//***************************************************************************** // // usb.c - Driver for the USB Interface. // // Copyright (c) 2007-2020 Texas Instruments Incorporated. All rights reserved. // Software License Agreement // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions // are met: // // Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // // Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the // distribution. // // Neither the name of Texas Instruments Incorporated nor the names of // its contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // This is part of revision 2.2.0.295 of the Tiva Peripheral Driver Library. // //***************************************************************************** //***************************************************************************** // //! \addtogroup usb_api //! @{ // //***************************************************************************** #include #include #include "inc/hw_ints.h" #include "inc/hw_memmap.h" #include "inc/hw_types.h" #include "inc/hw_sysctl.h" #include "inc/hw_usb.h" #include "driverlib/debug.h" #include "driverlib/interrupt.h" #include "driverlib/sysctl.h" #include "driverlib/udma.h" #include "driverlib/usb.h" //***************************************************************************** // // Amount to shift the RX interrupt sources by in the flags used in the // interrupt calls. // //***************************************************************************** #define USB_INTEP_RX_SHIFT 16 //***************************************************************************** // // Amount to shift the RX endpoint status sources by in the flags used in the // calls. // //***************************************************************************** #define USB_RX_EPSTATUS_SHIFT 16 //***************************************************************************** // // Converts from an endpoint specifier to the offset of the endpoint's // control/status registers. // //***************************************************************************** #define EP_OFFSET(Endpoint) (Endpoint - 0x10) //***************************************************************************** // // Sets one of the indexed registers. // // \param ui32Base specifies the USB module base address. // \param ui32Endpoint is the endpoint index to target for this write. // \param ui32IndexedReg is the indexed register to write to. // \param ui8Value is the value to write to the register. // // This function is used to access the indexed registers for each endpoint. // The only registers that are indexed are the FIFO configuration registers, // which are not used after configuration. // // \return None. // //***************************************************************************** static void _USBIndexWrite(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32IndexedReg, uint32_t ui32Value, uint32_t ui32Size) { uint32_t ui32Index; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == 0) || (ui32Endpoint == 1) || (ui32Endpoint == 2) || (ui32Endpoint == 3)); ASSERT((ui32Size == 1) || (ui32Size == 2)); // // Save the old index in case it was in use. // ui32Index = HWREGB(ui32Base + USB_O_EPIDX); // // Set the index. // HWREGB(ui32Base + USB_O_EPIDX) = ui32Endpoint; // // Determine the size of the register value. // if(ui32Size == 1) { // // Set the value. // HWREGB(ui32Base + ui32IndexedReg) = ui32Value; } else { // // Set the value. // HWREGH(ui32Base + ui32IndexedReg) = ui32Value; } // // Restore the old index in case it was in use. // HWREGB(ui32Base + USB_O_EPIDX) = ui32Index; } //***************************************************************************** // // Reads one of the indexed registers. // // \param ui32Base specifies the USB module base address. // \param ui32Endpoint is the endpoint index to target for this write. // \param ui32IndexedReg is the indexed register to write to. // \param ui32Size is a value of 1 or 2 indicating the byte size of the read. // // This function is used internally to access the indexed registers for each // endpoint. The only registers that are indexed are the FIFO configuration // registers, which are not used after configuration. // // \return The value in the register requested. // //***************************************************************************** static uint32_t _USBIndexRead(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32IndexedReg, uint32_t ui32Size) { uint8_t ui8Index; uint32_t ui32Value; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == 0) || (ui32Endpoint == 1) || (ui32Endpoint == 2) || (ui32Endpoint == 3)); ASSERT((ui32Size == 1) || (ui32Size == 2)); // // Save the old index in case it was in use. // ui8Index = HWREGB(ui32Base + USB_O_EPIDX); // // Set the index. // HWREGB(ui32Base + USB_O_EPIDX) = ui32Endpoint; // // Determine the size of the register value. // if(ui32Size == 1) { // // Get the value. // ui32Value = HWREGB(ui32Base + ui32IndexedReg); } else { // // Get the value. // ui32Value = HWREGH(ui32Base + ui32IndexedReg); } // // Restore the old index in case it was in use. // HWREGB(ui32Base + USB_O_EPIDX) = ui8Index; // // Return the register's value. // return(ui32Value); } //***************************************************************************** // //! Puts the USB bus in a suspended state. //! //! \param ui32Base specifies the USB module base address. //! //! When used in host mode, this function puts the USB bus in the suspended //! state. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostSuspend(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Send the suspend signaling to the USB bus. // HWREGB(ui32Base + USB_O_POWER) |= USB_POWER_SUSPEND; } //***************************************************************************** // //! Handles the USB bus reset condition. //! //! \param ui32Base specifies the USB module base address. //! \param bStart specifies whether to start or stop signaling reset on the USB //! bus. //! //! When this function is called with the \e bStart parameter set to \b true, //! this function causes the start of a reset condition on the USB bus. //! The caller must then delay at least 20ms before calling this function //! again with the \e bStart parameter set to \b false. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostReset(uint32_t ui32Base, bool bStart) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Send a reset signal to the bus. // if(bStart) { HWREGB(ui32Base + USB_O_POWER) |= USB_POWER_RESET; } else { HWREGB(ui32Base + USB_O_POWER) &= ~USB_POWER_RESET; } } //***************************************************************************** // //! Enables or disables USB high-speed negotiation. //! //! \param ui32Base specifies the USB module base address. //! \param bEnable specifies whether to enable or disable high-speed //! negotiation. //! //! High-speed negotiations for both host and device mode are enabled when this //! function is called with the \e bEnable parameter set to \b true. In device //! mode this causes the device to negotiate for high speed when the //! USB controller receives a reset from the host. In host mode, the USB host //! enables high-speed negotiations when resetting the connected device. If //! \e bEnable is set to \b false the controller only operates only in //! full-speed or low-speed. //! //! \b Example: Enable USB high-speed mode. //! //! \verbatim //! // //! // Enable USB high-speed mode. //! // //! USBHighSpeed(USB0_BASE, true); //! \endverbatim //! //! \note This feature is not available on all Tiva devices and should only be //! called when the USB is connected to an external ULPI PHY. Please //! check the data sheet to determine if the USB controller can interface with //! a ULPI PHY. //! //! \return None. // //***************************************************************************** void USBHighSpeed(uint32_t ui32Base, bool bEnable) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); if(bEnable) { // // Enable high speed mode negotiations in hosts or device mode. // HWREGB(ui32Base + USB_O_POWER) |= USB_POWER_HSENAB; } else { // // Enable high speed mode negotiations in hosts or device mode. // HWREGB(ui32Base + USB_O_POWER) &= ~USB_POWER_HSENAB; } } //***************************************************************************** // //! Handles the USB bus resume condition. //! //! \param ui32Base specifies the USB module base address. //! \param bStart specifies if the USB controller is entering or leaving the //! resume signaling state. //! //! When in device mode, this function brings the USB controller out of the //! suspend state. This call must first be made with the \e bStart parameter //! set to \b true to start resume signaling. The device application must //! then delay at least 10ms but not more than 15ms before calling this //! function with the \e bStart parameter set to \b false. //! //! When in host mode, this function signals devices to leave the suspend //! state. This call must first be made with the \e bStart parameter set to //! \b true to start resume signaling. The host application must then delay //! at least 20ms before calling this function with the \e bStart parameter set //! to \b false. This action causes the controller to complete the resume //! signaling on the USB bus. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostResume(uint32_t ui32Base, bool bStart) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Send a resume signal to the bus. // if(bStart) { HWREGB(ui32Base + USB_O_POWER) |= USB_POWER_RESUME; } else { HWREGB(ui32Base + USB_O_POWER) &= ~USB_POWER_RESUME; } } //***************************************************************************** // //! Returns the current speed of the USB device connected. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current speed of the USB bus in host mode. //! //! \b Example: Get the USB connection speed. //! //! \verbatim //! // //! // Get the connection speed of the device connected to the USB controller. //! // //! USBHostSpeedGet(USB0_BASE); //! \endverbatim //! //! \note This function must only be called in host mode. //! //! \return Returns one of the following: \b USB_LOW_SPEED, \b USB_FULL_SPEED, //! \b USB_HIGH_SPEED, or \b USB_UNDEF_SPEED. // //***************************************************************************** uint32_t USBHostSpeedGet(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // If the Full Speed device bit is set, then this is a full speed device. // if(HWREGB(ui32Base + USB_O_POWER) & USB_POWER_HSMODE) { return(USB_HIGH_SPEED); } // // If the Full Speed device bit is set, then this is a full speed device. // if(HWREGB(ui32Base + USB_O_DEVCTL) & USB_DEVCTL_FSDEV) { return(USB_FULL_SPEED); } // // If the Low Speed device bit is set, then this is a low speed device. // if(HWREGB(ui32Base + USB_O_DEVCTL) & USB_DEVCTL_LSDEV) { return(USB_LOW_SPEED); } // // The device speed is not known. // return(USB_UNDEF_SPEED); } //***************************************************************************** // //! Returns the current speed of the USB controller in device mode. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the operating speed of the connection to the USB host //! controller. This function returns either \b USB_HIGH_SPEED or //! \b USB_FULL_SPEED to indicate the connection speed in device mode. //! //! \b Example: Get the USB connection speed. //! //! \verbatim //! // //! // Get the connection speed of the USB controller. //! // //! USBDevSpeedGet(USB0_BASE); //! \endverbatim //! //! \note This function must only be called in device mode. //! //! \return Returns either \b USB_HIGH_SPEED or \b USB_FULL_SPEED. // //***************************************************************************** uint32_t USBDevSpeedGet(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // If the Full Speed device bit is set, then this is a full speed device. // if(HWREGB(ui32Base + USB_O_POWER) & USB_POWER_HSMODE) { return(USB_HIGH_SPEED); } return(USB_FULL_SPEED); } //***************************************************************************** // //! Disables control interrupts on a specified USB controller. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Flags specifies which control interrupts to disable. //! //! This function disables the control interrupts for the USB controller //! specified by the \e ui32Base parameter. The \e ui32Flags parameter //! specifies which control interrupts to disable. The flags passed in the //! \e ui32Flags parameters must be the definitions that start with //! \b USB_INTCTRL_* and not any other \b USB_INT flags. //! //! \return None. // //***************************************************************************** void USBIntDisableControl(uint32_t ui32Base, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Flags & ~(USB_INTCTRL_ALL)) == 0); // // If any general interrupts were disabled then write the general interrupt // settings out to the hardware. // if(ui32Flags & USB_INTCTRL_STATUS) { HWREGB(ui32Base + USB_O_IE) &= ~(ui32Flags & USB_INTCTRL_STATUS); } // // Disable the power fault interrupt. // if(ui32Flags & USB_INTCTRL_POWER_FAULT) { HWREG(ui32Base + USB_O_EPCIM) = 0; } // // Disable the ID pin detect interrupt. // if(ui32Flags & USB_INTCTRL_MODE_DETECT) { HWREG(USB0_BASE + USB_O_IDVIM) = 0; } } //***************************************************************************** // //! Enables control interrupts on a specified USB controller. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Flags specifies which control interrupts to enable. //! //! This function enables the control interrupts for the USB controller //! specified by the \e ui32Base parameter. The \e ui32Flags parameter //! specifies which control interrupts to enable. The flags passed in the //! \e ui32Flags parameters must be the definitions that start with //! \b USB_INTCTRL_* and not any other \b USB_INT flags. //! //! \return None. // //***************************************************************************** void USBIntEnableControl(uint32_t ui32Base, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Flags & (~USB_INTCTRL_ALL)) == 0); // // If any general interrupts were enabled, then write the general // interrupt settings out to the hardware. // if(ui32Flags & USB_INTCTRL_STATUS) { HWREGB(ui32Base + USB_O_IE) |= ui32Flags; } // // Enable the power fault interrupt. // if(ui32Flags & USB_INTCTRL_POWER_FAULT) { HWREG(ui32Base + USB_O_EPCIM) = USB_EPCIM_PF; } // // Enable the ID pin detect interrupt. // if(ui32Flags & USB_INTCTRL_MODE_DETECT) { HWREG(USB0_BASE + USB_O_IDVIM) = USB_IDVIM_ID; } } //***************************************************************************** // //! Returns the control interrupt status on a specified USB controller. //! //! \param ui32Base specifies the USB module base address. //! //! This function reads control interrupt status for a USB controller. This //! call returns the current status for control interrupts only, the endpoint //! interrupt status is retrieved by calling USBIntStatusEndpoint(). The bit //! values returned are compared against the \b USB_INTCTRL_* values. //! //! The following are the meanings of all \b USB_INCTRL_ flags and the modes //! for which they are valid. These values apply to any calls to //! USBIntStatusControl(), USBIntEnableControl(), and USBIntDisableControl(). //! Some of these flags are only valid in the following modes as indicated in //! the parentheses: Host, Device, and OTG. //! //! - \b USB_INTCTRL_ALL - A full mask of all control interrupt sources. //! - \b USB_INTCTRL_VBUS_ERR - A VBUS error has occurred (Host Only). //! - \b USB_INTCTRL_SESSION - Session Start Detected on A-side of cable //! (OTG Only). //! - \b USB_INTCTRL_SESSION_END - Session End Detected (Device Only) //! - \b USB_INTCTRL_DISCONNECT - Device Disconnect Detected (Host Only) //! - \b USB_INTCTRL_CONNECT - Device Connect Detected (Host Only) //! - \b USB_INTCTRL_SOF - Start of Frame Detected. //! - \b USB_INTCTRL_BABBLE - USB controller detected a device signaling past //! the end of a frame (Host Only) //! - \b USB_INTCTRL_RESET - Reset signaling detected by device (Device Only) //! - \b USB_INTCTRL_RESUME - Resume signaling detected. //! - \b USB_INTCTRL_SUSPEND - Suspend signaling detected by device (Device //! Only) //! - \b USB_INTCTRL_MODE_DETECT - OTG cable mode detection has completed //! (OTG Only) //! - \b USB_INTCTRL_POWER_FAULT - Power Fault detected (Host Only) //! //! \note This call clears the source of all of the control status interrupts. //! //! \return Returns the status of the control interrupts for a USB controller. // //***************************************************************************** uint32_t USBIntStatusControl(uint32_t ui32Base) { uint32_t ui32Status; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Get the general interrupt status, these bits go into the upper 8 bits // of the returned value. // ui32Status = HWREGB(ui32Base + USB_O_IS); // // Add the power fault status. // if(HWREG(ui32Base + USB_O_EPCISC) & USB_EPCISC_PF) { // // Indicate a power fault was detected. // ui32Status |= USB_INTCTRL_POWER_FAULT; // // Clear the power fault interrupt. // HWREGB(ui32Base + USB_O_EPCISC) |= USB_EPCISC_PF; } if(HWREG(USB0_BASE + USB_O_IDVISC) & USB_IDVRIS_ID) { // // Indicate an id detection. // ui32Status |= USB_INTCTRL_MODE_DETECT; // // Clear the id detection interrupt. // HWREG(USB0_BASE + USB_O_IDVISC) |= USB_IDVRIS_ID; } // // Return the combined interrupt status. // return(ui32Status); } //***************************************************************************** // //! Disables endpoint interrupts on a specified USB controller. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Flags specifies which endpoint interrupts to disable. //! //! This function disables endpoint interrupts for the USB controller specified //! by the \e ui32Base parameter. The \e ui32Flags parameter specifies which //! endpoint interrupts to disable. The flags passed in the \e ui32Flags //! parameters must be the definitions that start with \b USB_INTEP_* and not //! any other \b USB_INT flags. //! //! \return None. // //***************************************************************************** void USBIntDisableEndpoint(uint32_t ui32Base, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // If any transmit interrupts were disabled, then write the transmit // interrupt settings out to the hardware. // HWREGH(ui32Base + USB_O_TXIE) &= ~(ui32Flags & (USB_INTEP_HOST_OUT | USB_INTEP_DEV_IN | USB_INTEP_0)); // // If any receive interrupts were disabled, then write the receive // interrupt settings out to the hardware. // HWREGH(ui32Base + USB_O_RXIE) &= ~((ui32Flags & (USB_INTEP_HOST_IN | USB_INTEP_DEV_OUT)) >> USB_INTEP_RX_SHIFT); } //***************************************************************************** // //! Enables endpoint interrupts on a specified USB controller. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Flags specifies which endpoint interrupts to enable. //! //! This function enables endpoint interrupts for the USB controller specified //! by the \e ui32Base parameter. The \e ui32Flags parameter specifies which //! endpoint interrupts to enable. The flags passed in the \e ui32Flags //! parameters must be the definitions that start with \b USB_INTEP_* and not //! any other \b USB_INT flags. //! //! \return None. // //***************************************************************************** void USBIntEnableEndpoint(uint32_t ui32Base, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Enable any transmit endpoint interrupts. // HWREGH(ui32Base + USB_O_TXIE) |= ui32Flags & (USB_INTEP_HOST_OUT | USB_INTEP_DEV_IN | USB_INTEP_0); // // Enable any receive endpoint interrupts. // HWREGH(ui32Base + USB_O_RXIE) |= ((ui32Flags & (USB_INTEP_HOST_IN | USB_INTEP_DEV_OUT)) >> USB_INTEP_RX_SHIFT); } //***************************************************************************** // //! Returns the endpoint interrupt status on a specified USB controller. //! //! \param ui32Base specifies the USB module base address. //! //! This function reads endpoint interrupt status for a USB controller. This //! call returns the current status for endpoint interrupts only, the control //! interrupt status is retrieved by calling USBIntStatusControl(). The bit //! values returned are compared against the \b USB_INTEP_* values. //! These values are grouped into classes for \b USB_INTEP_HOST_* and //! \b USB_INTEP_DEV_* values to handle both host and device modes with all //! endpoints. //! //! \note This call clears the source of all of the endpoint interrupts. //! //! \return Returns the status of the endpoint interrupts for a USB controller. // //***************************************************************************** uint32_t USBIntStatusEndpoint(uint32_t ui32Base) { uint32_t ui32Status; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Get the transmit interrupt status. // ui32Status = HWREGH(ui32Base + USB_O_TXIS); ui32Status |= (HWREGH(ui32Base + USB_O_RXIS) << USB_INTEP_RX_SHIFT); // // Return the combined interrupt status. // return(ui32Status); } //***************************************************************************** // //! Returns the interrupt number for a specified USB module. //! //! \param ui32Base is the base address of the USB module. //! //! This function returns the interrupt number for the USB module with the base //! address passed in the \e ui32Base parameter. //! //! \return Returns the USB interrupt number or 0 if the interrupt does not //! exist. // //***************************************************************************** static uint32_t _USBIntNumberGet(uint32_t ui32Base) { uint32_t ui32Int; if(CLASS_IS_TM4C123) { ui32Int = INT_USB0_TM4C123; } else if(CLASS_IS_TM4C129) { ui32Int = INT_USB0_TM4C129; } else { ui32Int = 0; } return(ui32Int); } //***************************************************************************** // //! Registers an interrupt handler for the USB controller. //! //! \param ui32Base specifies the USB module base address. //! \param pfnHandler is a pointer to the function to be called when a USB //! interrupt occurs. //! //! This function registers the handler to be called when a USB interrupt //! occurs and enables the global USB interrupt in the interrupt controller. //! The specific desired USB interrupts must be enabled via a separate call to //! USBIntEnable(). It is the interrupt handler's responsibility to clear the //! interrupt sources via calls to USBIntStatusControl() and //! USBIntStatusEndpoint(). //! //! \sa IntRegister() for important information about registering interrupt //! handlers. //! //! \return None. // //***************************************************************************** void USBIntRegister(uint32_t ui32Base, void (*pfnHandler)(void)) { uint32_t ui32Int; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ui32Int = _USBIntNumberGet(ui32Base); ASSERT(ui32Int != 0); // // Register the interrupt handler. // IntRegister(ui32Int, pfnHandler); // // Enable the USB interrupt. // IntEnable(ui32Int); } //***************************************************************************** // //! Unregisters an interrupt handler for the USB controller. //! //! \param ui32Base specifies the USB module base address. //! //! This function unregisters the interrupt handler. This function also //! disables the USB interrupt in the interrupt controller. //! //! \sa IntRegister() for important information about registering or //! unregistering interrupt handlers. //! //! \return None. // //***************************************************************************** void USBIntUnregister(uint32_t ui32Base) { uint32_t ui32Int; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ui32Int = _USBIntNumberGet(ui32Base); ASSERT(ui32Int != 0); // // Disable the USB interrupt. // IntDisable(ui32Int); // // Unregister the interrupt handler. // IntUnregister(ui32Int); } //***************************************************************************** // //! Returns the current status of an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! //! This function returns the status of a specified endpoint. If any of these //! status bits must be cleared, then the USBDevEndpointStatusClear() or the //! USBHostEndpointStatusClear() functions must be called. //! //! The following are the status flags for host mode: //! //! - \b USB_HOST_IN_PID_ERROR - PID error on the specified endpoint. //! - \b USB_HOST_IN_NOT_COMP - The device failed to respond to an IN request. //! - \b USB_HOST_IN_STALL - A stall was received on an IN endpoint. //! - \b USB_HOST_IN_DATA_ERROR - There was a CRC or bit-stuff error on an IN //! endpoint in Isochronous mode. //! - \b USB_HOST_IN_NAK_TO - NAKs received on this IN endpoint for more than //! the specified timeout period. //! - \b USB_HOST_IN_ERROR - Failed to communicate with a device using this IN //! endpoint. //! - \b USB_HOST_IN_FIFO_FULL - This IN endpoint's FIFO is full. //! - \b USB_HOST_IN_PKTRDY - Data packet ready on this IN endpoint. //! - \b USB_HOST_OUT_NAK_TO - NAKs received on this OUT endpoint for more than //! the specified timeout period. //! - \b USB_HOST_OUT_NOT_COMP - The device failed to respond to an OUT //! request. //! - \b USB_HOST_OUT_STALL - A stall was received on this OUT endpoint. //! - \b USB_HOST_OUT_ERROR - Failed to communicate with a device using this //! OUT endpoint. //! - \b USB_HOST_OUT_FIFO_NE - This endpoint's OUT FIFO is not empty. //! - \b USB_HOST_OUT_PKTPEND - The data transfer on this OUT endpoint has not //! completed. //! - \b USB_HOST_EP0_NAK_TO - NAKs received on endpoint zero for more than the //! specified timeout period. //! - \b USB_HOST_EP0_ERROR - The device failed to respond to a request on //! endpoint zero. //! - \b USB_HOST_EP0_IN_STALL - A stall was received on endpoint zero for an //! IN transaction. //! - \b USB_HOST_EP0_IN_PKTRDY - Data packet ready on endpoint zero for an IN //! transaction. //! //! The following are the status flags for device mode: //! //! - \b USB_DEV_OUT_SENT_STALL - A stall was sent on this OUT endpoint. //! - \b USB_DEV_OUT_DATA_ERROR - There was a CRC or bit-stuff error on an OUT //! endpoint. //! - \b USB_DEV_OUT_OVERRUN - An OUT packet was not loaded due to a full FIFO. //! - \b USB_DEV_OUT_FIFO_FULL - The OUT endpoint's FIFO is full. //! - \b USB_DEV_OUT_PKTRDY - There is a data packet ready in the OUT //! endpoint's FIFO. //! - \b USB_DEV_IN_NOT_COMP - A larger packet was split up, more data to come. //! - \b USB_DEV_IN_SENT_STALL - A stall was sent on this IN endpoint. //! - \b USB_DEV_IN_UNDERRUN - Data was requested on the IN endpoint and no //! data was ready. //! - \b USB_DEV_IN_FIFO_NE - The IN endpoint's FIFO is not empty. //! - \b USB_DEV_IN_PKTPEND - The data transfer on this IN endpoint has not //! completed. //! - \b USB_DEV_EP0_SETUP_END - A control transaction ended before Data End //! condition was sent. //! - \b USB_DEV_EP0_SENT_STALL - A stall was sent on endpoint zero. //! - \b USB_DEV_EP0_IN_PKTPEND - The data transfer on endpoint zero has not //! completed. //! - \b USB_DEV_EP0_OUT_PKTRDY - There is a data packet ready in endpoint //! zero's OUT FIFO. //! //! \return The current status flags for the endpoint depending on mode. // //***************************************************************************** uint32_t USBEndpointStatus(uint32_t ui32Base, uint32_t ui32Endpoint) { uint32_t ui32Status; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Get the TX portion of the endpoint status. // ui32Status = HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRL1); // // Get the RX portion of the endpoint status. // ui32Status |= ((HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRL1)) << USB_RX_EPSTATUS_SHIFT); // // Return the endpoint status. // return(ui32Status); } //***************************************************************************** // //! Clears the status bits in this endpoint in host mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags are the status bits that are cleared. //! //! This function clears the status of any bits that are passed in the //! \e ui32Flags parameter. The \e ui32Flags parameter can take the value //! returned from the USBEndpointStatus() call. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostEndpointStatusClear(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Clear the specified flags for the endpoint. // if(ui32Endpoint == USB_EP_0) { HWREGB(ui32Base + USB_O_CSRL0) &= ~ui32Flags; } else { HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~ui32Flags; HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~(ui32Flags >> USB_RX_EPSTATUS_SHIFT); } } //***************************************************************************** // //! Clears the status bits in this endpoint in device mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags are the status bits that are cleared. //! //! This function clears the status of any bits that are passed in the //! \e ui32Flags parameter. The \e ui32Flags parameter can take the value //! returned from the USBEndpointStatus() call. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevEndpointStatusClear(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // If this is endpoint 0, then the bits have different meaning and map // into the TX memory location. // if(ui32Endpoint == USB_EP_0) { // // Set the Serviced RxPktRdy bit to clear the RxPktRdy. // if(ui32Flags & USB_DEV_EP0_OUT_PKTRDY) { HWREGB(ui32Base + USB_O_CSRL0) |= USB_CSRL0_RXRDYC; } // // Set the serviced Setup End bit to clear the SetupEnd status. // if(ui32Flags & USB_DEV_EP0_SETUP_END) { HWREGB(ui32Base + USB_O_CSRL0) |= USB_CSRL0_SETENDC; } // // Clear the Sent Stall status flag. // if(ui32Flags & USB_DEV_EP0_SENT_STALL) { HWREGB(ui32Base + USB_O_CSRL0) &= ~(USB_DEV_EP0_SENT_STALL); } } else { // // Clear out any TX flags that were passed in. Only // USB_DEV_TX_SENT_STALL and USB_DEV_TX_UNDERRUN must be cleared. // HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~(ui32Flags & (USB_DEV_TX_SENT_STALL | USB_DEV_TX_UNDERRUN)); // // Clear out valid RX flags that were passed in. Only // USB_DEV_RX_SENT_STALL, USB_DEV_RX_DATA_ERROR, and USB_DEV_RX_OVERRUN // must be cleared. // HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~((ui32Flags & (USB_DEV_RX_SENT_STALL | USB_DEV_RX_DATA_ERROR | USB_DEV_RX_OVERRUN)) >> USB_RX_EPSTATUS_SHIFT); } } //***************************************************************************** // //! Sets the value data toggle on an endpoint in host mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint specifies the endpoint to reset the data toggle. //! \param bDataToggle specifies whether to set the state to DATA0 or DATA1. //! \param ui32Flags specifies whether to set the IN or OUT endpoint. //! //! This function is used to force the state of the data toggle in host mode. //! If the value passed in the \e bDataToggle parameter is \b false, then the //! data toggle is set to the DATA0 state, and if it is \b true it is set to //! the DATA1 state. The \e ui32Flags parameter can be \b USB_EP_HOST_IN or //! \b USB_EP_HOST_OUT to access the desired portion of this endpoint. The //! \e ui32Flags parameter is ignored for endpoint zero. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostEndpointDataToggle(uint32_t ui32Base, uint32_t ui32Endpoint, bool bDataToggle, uint32_t ui32Flags) { uint32_t ui32DataToggle; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // The data toggle defaults to DATA0. // ui32DataToggle = 0; // // See if the data toggle must be set to DATA1. // if(bDataToggle) { // // Select the data toggle bit based on the endpoint. // if(ui32Endpoint == USB_EP_0) { ui32DataToggle = USB_CSRH0_DT; } else if(ui32Flags == USB_EP_HOST_IN) { ui32DataToggle = USB_RXCSRH1_DT; } else { ui32DataToggle = USB_TXCSRH1_DT; } } // // Set the data toggle based on the endpoint. // if(ui32Endpoint == USB_EP_0) { // // Set the write enable and the bit value for endpoint zero. // HWREGB(ui32Base + USB_O_CSRH0) = ((HWREGB(ui32Base + USB_O_CSRH0) & ~(USB_CSRH0_DTWE | USB_CSRH0_DT)) | (ui32DataToggle | USB_CSRH0_DTWE)); } else if(ui32Flags == USB_EP_HOST_IN) { // // Set the Write enable and the bit value for an IN endpoint. // HWREGB(ui32Base + USB_O_RXCSRH1 + EP_OFFSET(ui32Endpoint)) = ((HWREGB(ui32Base + USB_O_RXCSRH1 + EP_OFFSET(ui32Endpoint)) & ~(USB_RXCSRH1_DTWE | USB_RXCSRH1_DT)) | (ui32DataToggle | USB_RXCSRH1_DTWE)); } else { // // Set the Write enable and the bit value for an OUT endpoint. // HWREGB(ui32Base + USB_O_TXCSRH1 + EP_OFFSET(ui32Endpoint)) = ((HWREGB(ui32Base + USB_O_TXCSRH1 + EP_OFFSET(ui32Endpoint)) & ~(USB_TXCSRH1_DTWE | USB_TXCSRH1_DT)) | (ui32DataToggle | USB_TXCSRH1_DTWE)); } } //***************************************************************************** // //! Sets the data toggle on an endpoint to zero. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint specifies the endpoint to reset the data toggle. //! \param ui32Flags specifies whether to access the IN or OUT endpoint. //! //! This function causes the USB controller to clear the data toggle for an //! endpoint. This call is not valid for endpoint zero and can be made with //! host or device controllers. //! //! The \e ui32Flags parameter must be one of \b USB_EP_HOST_OUT, //! \b USB_EP_HOST_IN, \b USB_EP_DEV_OUT, or \b USB_EP_DEV_IN. //! //! \return None. // //***************************************************************************** void USBEndpointDataToggleClear(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // See if the transmit or receive data toggle must be cleared. // if(ui32Flags & (USB_EP_HOST_OUT | USB_EP_DEV_IN)) { HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_TXCSRL1_CLRDT; } else { HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_RXCSRL1_CLRDT; } } //***************************************************************************** // //! Enables or disables ping tokens for an endpoint using high-speed control //! transfers in host mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint specifies the endpoint to enable/disable ping tokens. //! \param bEnable specifies whether enable or disable ping tokens. //! //! This function configures the USB controller to either send or not send ping //! tokens during the data and status phase of high speed control transfers. //! The only supported value for \e ui32Endpoint is \b USB_EP_0 because all //! control transfers are handled using this endpoint. If the \e bEnable is //! \b true then ping tokens are enabled, if \b false then ping tokens are //! disabled. This must be used if the controller must support //! communications with devices that do not support ping tokens in high speed //! mode. //! //! \b Example: Disable ping transactions in host mode on endpoint 0. //! //! \verbatim //! // //! // Disable ping transaction on endpoint 0. //! // //! USBHostEndpointPing(USB0_BASE, USB_EP_0, false); //! \endverbatim //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostEndpointPing(uint32_t ui32Base, uint32_t ui32Endpoint, bool bEnable) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0)); // // Handle the endpoint 0 case separately. // if(bEnable) { HWREGB(USB0_BASE + USB_O_CSRH0) &= ~USB_CSRH0_DISPING; } else { HWREGB(USB0_BASE + USB_O_CSRH0) |= USB_CSRH0_DISPING; } } //***************************************************************************** // //! Stalls the specified endpoint in device mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint specifies the endpoint to stall. //! \param ui32Flags specifies whether to stall the IN or OUT endpoint. //! //! This function causes the endpoint number passed in to go into a stall //! condition. If the \e ui32Flags parameter is \b USB_EP_DEV_IN, then the //! stall is issued on the IN portion of this endpoint. If the \e ui32Flags //! parameter is \b USB_EP_DEV_OUT, then the stall is issued on the OUT portion //! of this endpoint. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevEndpointStall(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Flags & ~(USB_EP_DEV_IN | USB_EP_DEV_OUT)) == 0); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Determine how to stall this endpoint. // if(ui32Endpoint == USB_EP_0) { // // Perform a stall on endpoint zero. // HWREGB(ui32Base + USB_O_CSRL0) |= USB_CSRL0_STALL | USB_CSRL0_RXRDYC; } else if(ui32Flags == USB_EP_DEV_IN) { // // Perform a stall on an IN endpoint. // HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_TXCSRL1_STALL; } else { // // Perform a stall on an OUT endpoint. // HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_RXCSRL1_STALL; } } //***************************************************************************** // //! Clears the stall condition on the specified endpoint in device mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint specifies which endpoint to remove the stall condition. //! \param ui32Flags specifies whether to remove the stall condition from the //! IN or the OUT portion of this endpoint. //! //! This function causes the endpoint number passed in to exit the stall //! condition. If the \e ui32Flags parameter is \b USB_EP_DEV_IN, then the //! stall is cleared on the IN portion of this endpoint. If the \e ui32Flags //! parameter is \b USB_EP_DEV_OUT, then the stall is cleared on the OUT //! portion of this endpoint. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevEndpointStallClear(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); ASSERT((ui32Flags & ~(USB_EP_DEV_IN | USB_EP_DEV_OUT)) == 0); // // Determine how to clear the stall on this endpoint. // if(ui32Endpoint == USB_EP_0) { // // Clear the stall on endpoint zero. // HWREGB(ui32Base + USB_O_CSRL0) &= ~USB_CSRL0_STALLED; } else if(ui32Flags == USB_EP_DEV_IN) { // // Clear the stall on an IN endpoint. // HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~(USB_TXCSRL1_STALL | USB_TXCSRL1_STALLED); // // Reset the data toggle. // HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_TXCSRL1_CLRDT; } else { // // Clear the stall on an OUT endpoint. // HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~(USB_RXCSRL1_STALL | USB_RXCSRL1_STALLED); // // Reset the data toggle. // HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_RXCSRL1_CLRDT; } } //***************************************************************************** // //! Connects the USB controller to the bus in device mode. //! //! \param ui32Base specifies the USB module base address. //! //! This function causes the soft connect feature of the USB controller to //! be enabled. Call USBDevDisconnect() to remove the USB device from the bus. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevConnect(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Enable connection to the USB bus. // HWREGB(ui32Base + USB_O_POWER) |= USB_POWER_SOFTCONN; } //***************************************************************************** // //! Removes the USB controller from the bus in device mode. //! //! \param ui32Base specifies the USB module base address. //! //! This function causes the soft connect feature of the USB controller to //! remove the device from the USB bus. A call to USBDevConnect() is needed to //! reconnect to the bus. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevDisconnect(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Disable connection to the USB bus. // HWREGB(ui32Base + USB_O_POWER) &= (~USB_POWER_SOFTCONN); } //***************************************************************************** // //! Sets the address in device mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Address is the address to use for a device. //! //! This function configures the device address on the USB bus. This address //! was likely received via a SET ADDRESS command from the host controller. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevAddrSet(uint32_t ui32Base, uint32_t ui32Address) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Set the function address in the correct location. // HWREGB(ui32Base + USB_O_FADDR) = (uint8_t)ui32Address; } //***************************************************************************** // //! Returns the current device address in device mode. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current device address. This address was set //! by a call to USBDevAddrSet(). //! //! \note This function must only be called in device mode. //! //! \return The current device address. // //***************************************************************************** uint32_t USBDevAddrGet(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Return the function address. // return(HWREGB(ui32Base + USB_O_FADDR)); } //***************************************************************************** // //! Sets the base configuration for a host endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32MaxPayload is the maximum payload for this endpoint. //! \param ui32NAKPollInterval is the either the NAK timeout limit or the //! polling interval, depending on the type of endpoint. //! \param ui32TargetEndpoint is the endpoint that the host endpoint is //! targeting. //! \param ui32Flags are used to configure other endpoint settings. //! //! This function sets the basic configuration for the transmit or receive //! portion of an endpoint in host mode. The \e ui32Flags parameter determines //! some of the configuration while the other parameters provide the rest. The //! \e ui32Flags parameter determines whether this is an IN endpoint //! (\b USB_EP_HOST_IN or \b USB_EP_DEV_IN) or an OUT endpoint //! (\b USB_EP_HOST_OUT or \b USB_EP_DEV_OUT), whether this is a Full speed //! endpoint (\b USB_EP_SPEED_FULL) or a Low speed endpoint //! (\b USB_EP_SPEED_LOW). //! //! The \b USB_EP_MODE_ flags control the type of the endpoint. //! - \b USB_EP_MODE_CTRL is a control endpoint. //! - \b USB_EP_MODE_ISOC is an isochronous endpoint. //! - \b USB_EP_MODE_BULK is a bulk endpoint. //! - \b USB_EP_MODE_INT is an interrupt endpoint. //! //! The \e ui32NAKPollInterval parameter has different meanings based on the //! \b USB_EP_MODE value and whether or not this call is being made for //! endpoint zero or another endpoint. For endpoint zero or any Bulk //! endpoints, this value always indicates the number of frames to allow a //! device to NAK before considering it a timeout. If this endpoint is an //! isochronous or interrupt endpoint, this value is the polling interval for //! this endpoint. //! //! For interrupt endpoints, the polling interval is the number of frames //! between interrupt IN requests to an endpoint and has a range of 1 to 255. //! For isochronous endpoints this value represents a polling interval of //! 2 ^ (\e ui32NAKPollInterval - 1) frames. When used as a NAK timeout, the //! \e ui32NAKPollInterval value specifies 2 ^ (\e ui32NAKPollInterval - 1) //! frames before issuing a time out. //! //! There are two special time out values that can be specified when setting //! the \e ui32NAKPollInterval value. The first is \b MAX_NAK_LIMIT, which is //! the maximum value that can be passed in this variable. The other is //! \b DISABLE_NAK_LIMIT, which indicates that there is no limit on the //! number of NAKs. //! //! The \b USB_EP_DMA_MODE_ flags determine the type of DMA access to the //! endpoint data FIFOs. The choice of the DMA mode depends on how the DMA //! controller is configured and how it is being used. See the ``Using USB //! with the uDMA Controller'' or the ''Using the integrated USB DMA //! Controller'' section for more information on DMA configuration depending //! on the type of DMA that is supported by the USB controller. //! //! When configuring the OUT portion of an endpoint, the \b USB_EP_AUTO_SET bit //! is specified to cause the transmission of data on the USB bus to start //! as soon as the number of bytes specified by \e ui32MaxPayload has been //! written into the OUT FIFO for this endpoint. //! //! When configuring the IN portion of an endpoint, the \b USB_EP_AUTO_REQUEST //! bit can be specified to trigger the request for more data once the FIFO has //! been drained enough to fit \e ui32MaxPayload bytes. The //! \b USB_EP_AUTO_CLEAR bit can be used to clear the data packet ready flag //! automatically once the data has been read from the FIFO. If this option is //! not used, this flag must be manually cleared via a call to //! USBDevEndpointStatusClear() or USBHostEndpointStatusClear(). //! //! For interrupt endpoints in low or full speed mode, the polling interval //! (\e ui32NAKPollInterval) is the number of frames between interrupt IN //! requests to an endpoint and has a range of 1 to 255. For interrupt //! endpoints in high speed mode the polling interval is //! 2 ^ (\e ui32NAKPollInterval - 1) microframes between interrupt IN requests //! to an endpoint and has a range of 1 to 16. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostEndpointConfig(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32MaxPayload, uint32_t ui32NAKPollInterval, uint32_t ui32TargetEndpoint, uint32_t ui32Flags) { uint32_t ui32Register; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); ASSERT(ui32NAKPollInterval <= MAX_NAK_LIMIT); // // Endpoint zero is configured differently than the other endpoints, so see // if this is endpoint zero. // if(ui32Endpoint == USB_EP_0) { // // Set the NAK timeout. // HWREGB(ui32Base + USB_O_NAKLMT) = ui32NAKPollInterval; // // Set the transfer type information. // // // Set the speed of this endpoint. // if(ui32Flags & USB_EP_SPEED_HIGH) { HWREGB(ui32Base + USB_O_TYPE0) = USB_TYPE0_SPEED_HIGH; } else if(ui32Flags & USB_EP_SPEED_FULL) { HWREGB(ui32Base + USB_O_TYPE0) = USB_TYPE0_SPEED_FULL; } else { HWREGB(ui32Base + USB_O_TYPE0) = USB_TYPE0_SPEED_LOW; } } else { // // Start with the target endpoint. // ui32Register = ui32TargetEndpoint; // // Set the speed for the device using this endpoint. // if(ui32Flags & USB_EP_SPEED_HIGH) { ui32Register |= USB_TXTYPE1_SPEED_HIGH; } else if(ui32Flags & USB_EP_SPEED_FULL) { ui32Register |= USB_TXTYPE1_SPEED_FULL; } else { ui32Register |= USB_TXTYPE1_SPEED_LOW; } // // Set the protocol for the device using this endpoint. // switch(ui32Flags & USB_EP_MODE_MASK) { // // The bulk protocol is being used. // case USB_EP_MODE_BULK: { ui32Register |= USB_TXTYPE1_PROTO_BULK; break; } // // The isochronous protocol is being used. // case USB_EP_MODE_ISOC: { ui32Register |= USB_TXTYPE1_PROTO_ISOC; break; } // // The interrupt protocol is being used. // case USB_EP_MODE_INT: { ui32Register |= USB_TXTYPE1_PROTO_INT; break; } // // The control protocol is being used. // case USB_EP_MODE_CTRL: { ui32Register |= USB_TXTYPE1_PROTO_CTRL; break; } } // // See if the transmit or receive endpoint is being configured. // if(ui32Flags & USB_EP_HOST_OUT) { // // Set the transfer type information. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXTYPE1) = ui32Register; // // Set the NAK timeout or polling interval. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXINTERVAL1) = ui32NAKPollInterval; // // Set the Maximum Payload per transaction. // HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXMAXP1) = ui32MaxPayload; // // Set the transmit control value to zero. // ui32Register = 0; // // Allow auto setting of TxPktRdy when max packet size has been // loaded into the FIFO. // if(ui32Flags & USB_EP_AUTO_SET) { ui32Register |= USB_TXCSRH1_AUTOSET; } // // Configure the DMA Mode. // if(ui32Flags & USB_EP_DMA_MODE_1) { ui32Register |= USB_TXCSRH1_DMAEN | USB_TXCSRH1_DMAMOD; } else if(ui32Flags & USB_EP_DMA_MODE_0) { ui32Register |= USB_TXCSRH1_DMAEN; } // // Write out the transmit control value. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRH1) = (uint8_t)ui32Register; } else { // // Set the transfer type information. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXTYPE1) = ui32Register; // // Set the NAK timeout or polling interval. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXINTERVAL1) = ui32NAKPollInterval; // // Set the Maximum Payload per transaction. // HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXMAXP1) = ui32MaxPayload; // // Set the receive control value to zero. // ui32Register = 0; // // Allow auto clearing of RxPktRdy when packet of size max packet // has been unloaded from the FIFO. // if(ui32Flags & USB_EP_AUTO_CLEAR) { ui32Register |= USB_RXCSRH1_AUTOCL; } // // Allow auto generation of DMA requests. // if(ui32Flags & USB_EP_AUTO_REQUEST) { ui32Register |= USB_RXCSRH1_AUTORQ; } // // Configure the DMA Mode. // if(ui32Flags & USB_EP_DMA_MODE_1) { ui32Register |= USB_RXCSRH1_DMAEN | USB_RXCSRH1_DMAMOD; } else if(ui32Flags & USB_EP_DMA_MODE_0) { ui32Register |= USB_RXCSRH1_DMAEN; } // // Write out the receive control value. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRH1) = (uint8_t)ui32Register; } } } //***************************************************************************** // //! Changes the speed of the connection for a host endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags are used to configure other endpoint settings. //! //! This function sets the USB speed for an IN or OUT endpoint in host mode. //! The \e ui32Flags parameter specifies the speed using one of the following //! values: \b USB_EP_SPEED_LOW, \b USB_EP_SPEED_FULL, or \b USB_EP_SPEED_HIGH. //! The \e ui32Flags parameter also specifies which direction is set by //! adding the logical OR in either \b USB_EP_HOST_IN or \b USB_EP_HOST_OUT. //! All other flags are ignored. This function is typically only used for //! endpoint 0, but could be used with other endpoints as well. //! //! \b Example: Set host transactions on endpoint 0 to full speed.. //! //! \verbatim //! // //! // Set host endpoint 0 transactions to full speed. //! // //! USBHostEndpointSpeed(USB0_BASE, USB_EP_0, USB_EP_SPEED_FULL); //! \endverbatim //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostEndpointSpeed(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { uint32_t ui32Reg; uint32_t ui32Speed; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Create the register speed value. // if(ui32Flags & USB_EP_SPEED_HIGH) { ui32Speed = USB_TYPE0_SPEED_HIGH; } else if(ui32Flags & USB_EP_SPEED_FULL) { ui32Speed = USB_TYPE0_SPEED_FULL; } else { ui32Speed = USB_TYPE0_SPEED_LOW; } // // Endpoint 0 is handled differently as it is bi-directional. // if(ui32Endpoint == USB_EP_0) { HWREGB(ui32Base + USB_O_TYPE0) = ui32Speed; } else if(ui32Flags & USB_EP_HOST_OUT) { // // Clear the current speed and set the new speed. // ui32Reg = (HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXTYPE1) & ~(USB_TXTYPE1_SPEED_M)); ui32Reg |= ui32Speed; HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXTYPE1) |= ui32Reg; } else { // // Clear the current speed and set the new speed. // ui32Reg = (HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXTYPE1) & ~(USB_RXTYPE1_SPEED_M)); ui32Reg |= ui32Speed; HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXTYPE1) |= ui32Reg; } } //***************************************************************************** // //! Sets the configuration for an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32MaxPacketSize is the maximum packet size for this endpoint. //! \param ui32Flags are used to configure other endpoint settings. //! //! This function sets the basic configuration for an endpoint in device mode. //! Endpoint zero does not have a dynamic configuration, so this function //! must not be called for endpoint zero. The \e ui32Flags parameter //! determines some of the configuration while the other parameters provide the //! rest. //! //! The \b USB_EP_MODE_ flags define what the type is for the specified endpoint. //! //! - \b USB_EP_MODE_CTRL is a control endpoint. //! - \b USB_EP_MODE_ISOC is an isochronous endpoint. //! - \b USB_EP_MODE_BULK is a bulk endpoint. //! - \b USB_EP_MODE_INT is an interrupt endpoint. //! //! The \b USB_EP_DMA_MODE_ flags determine the type of DMA access to the //! endpoint data FIFOs. The choice of the DMA mode depends on how the DMA //! controller is configured and how it is being used. See the ``Using USB //! with the uDMA Controller'' or the ''Using the integrated USB DMA //! Controller'' section for more information on DMA configuration depending //! on the type of DMA that is supported by the USB controller. //! //! When configuring an IN endpoint, the \b USB_EP_AUTO_SET bit can be //! specified to cause the automatic transmission of data on the USB bus as //! soon as \e ui32MaxPacketSize bytes of data are written into the FIFO for //! this endpoint. This option is commonly used with DMA (both on devices //! with integrated USB DMA as well as those that use uDMA) as no interaction //! is required to start the transmission of data. //! //! When configuring an OUT endpoint, the \b USB_EP_AUTO_REQUEST bit is //! specified to trigger the request for more data once the FIFO has been //! drained enough to receive \e ui32MaxPacketSize more bytes of data. Also //! for OUT endpoints, the \b USB_EP_AUTO_CLEAR bit can be used to clear the //! data packet ready flag automatically once the data has been read from the //! FIFO. If this option is not used, this flag must be manually cleared via a //! call to USBDevEndpointStatusClear(). Both of these settings can be used to //! remove the need for extra calls when using the controller with DMA. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevEndpointConfigSet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32MaxPacketSize, uint32_t ui32Flags) { uint32_t ui32Register; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Determine if a transmit or receive endpoint is being configured. // if(ui32Flags & USB_EP_DEV_IN) { // // Set the maximum packet size. // HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXMAXP1) = ui32MaxPacketSize; // // The transmit control value is zero unless options are enabled. // ui32Register = 0; // // Allow auto setting of TxPktRdy when max packet size has been loaded // into the FIFO. // if(ui32Flags & USB_EP_AUTO_SET) { ui32Register |= USB_TXCSRH1_AUTOSET; } // // Configure the DMA mode. // if(ui32Flags & USB_EP_DMA_MODE_1) { ui32Register |= USB_TXCSRH1_DMAEN | USB_TXCSRH1_DMAMOD; } else if(ui32Flags & USB_EP_DMA_MODE_0) { ui32Register |= USB_TXCSRH1_DMAEN; } // // Enable isochronous mode if requested. // if((ui32Flags & USB_EP_MODE_MASK) == USB_EP_MODE_ISOC) { ui32Register |= USB_TXCSRH1_ISO; } // // Write the transmit control value. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRH1) = (uint8_t)ui32Register; // // Reset the Data toggle to zero. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRL1) = USB_TXCSRL1_CLRDT; } else { // // Set the MaxPacketSize. // HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXMAXP1) = ui32MaxPacketSize; // // The receive control value is zero unless options are enabled. // ui32Register = 0; // // Allow auto clearing of RxPktRdy when packet of size max packet // has been unloaded from the FIFO. // if(ui32Flags & USB_EP_AUTO_CLEAR) { ui32Register = USB_RXCSRH1_AUTOCL; } // // Configure the DMA mode. // if(ui32Flags & USB_EP_DMA_MODE_1) { ui32Register |= USB_RXCSRH1_DMAEN | USB_RXCSRH1_DMAMOD; } else if(ui32Flags & USB_EP_DMA_MODE_0) { ui32Register |= USB_RXCSRH1_DMAEN; } // // If requested, disable NYET responses for high-speed bulk and // interrupt endpoints. // if(ui32Flags & USB_EP_DIS_NYET) { ui32Register |= USB_RXCSRH1_DISNYET; } // // Enable isochronous mode if requested. // if((ui32Flags & USB_EP_MODE_MASK) == USB_EP_MODE_ISOC) { ui32Register |= USB_RXCSRH1_ISO; } // // Write the receive control value. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRH1) = (uint8_t)ui32Register; // // Reset the Data toggle to zero. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRL1) = USB_RXCSRL1_CLRDT; } } //***************************************************************************** // //! Gets the current configuration for an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param pui32MaxPacketSize is a pointer which is written with the maximum //! packet size for this endpoint. //! \param pui32Flags is a pointer which is written with the current endpoint //! settings. On entry to the function, this pointer must contain either //! \b USB_EP_DEV_IN or \b USB_EP_DEV_OUT to indicate whether the IN or OUT //! endpoint is to be queried. //! //! This function returns the basic configuration for an endpoint in device //! mode. The values returned in \e *pui32MaxPacketSize and \e *pui32Flags are //! equivalent to the \e ui32MaxPacketSize and \e ui32Flags previously passed //! to USBDevEndpointConfigSet() for this endpoint. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevEndpointConfigGet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t *pui32MaxPacketSize, uint32_t *pui32Flags) { uint32_t ui32Register; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT(pui32MaxPacketSize && pui32Flags); ASSERT((ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Determine if a transmit or receive endpoint is being queried. // if(*pui32Flags & USB_EP_DEV_IN) { // // Clear the flags other than the direction bit. // *pui32Flags = USB_EP_DEV_IN; // // Get the maximum packet size. // *pui32MaxPacketSize = (uint32_t)HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXMAXP1); // // Get the current transmit control register value. // ui32Register = (uint32_t)HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRH1); // // Are we allowing auto setting of TxPktRdy when max packet size has // been loaded into the FIFO? // if(ui32Register & USB_TXCSRH1_AUTOSET) { *pui32Flags |= USB_EP_AUTO_SET; } // // Get the DMA mode. // if(ui32Register & USB_TXCSRH1_DMAEN) { if(ui32Register & USB_TXCSRH1_DMAMOD) { *pui32Flags |= USB_EP_DMA_MODE_1; } else { *pui32Flags |= USB_EP_DMA_MODE_0; } } // // Are we in isochronous mode? // if(ui32Register & USB_TXCSRH1_ISO) { *pui32Flags |= USB_EP_MODE_ISOC; } else { // // The hardware doesn't differentiate between bulk, interrupt // and control mode for the endpoint so we just set something // that isn't isochronous. This protocol ensures that anyone // modifying the returned flags in preparation for a call to // USBDevEndpointConfigSet do not see an unexpected mode change. // If they decode the returned mode, however, they may be in for // a surprise. // *pui32Flags |= USB_EP_MODE_BULK; } } else { // // Clear the flags other than the direction bit. // *pui32Flags = USB_EP_DEV_OUT; // // Get the MaxPacketSize. // *pui32MaxPacketSize = (uint32_t)HWREGH(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXMAXP1); // // Get the current receive control register value. // ui32Register = (uint32_t)HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRH1); // // Are we allowing auto clearing of RxPktRdy when packet of size max // packet has been unloaded from the FIFO? // if(ui32Register & USB_RXCSRH1_AUTOCL) { *pui32Flags |= USB_EP_AUTO_CLEAR; } // // Get the DMA mode. // if(ui32Register & USB_RXCSRH1_DMAEN) { if(ui32Register & USB_RXCSRH1_DMAMOD) { *pui32Flags |= USB_EP_DMA_MODE_1; } else { *pui32Flags |= USB_EP_DMA_MODE_0; } } // // Are we in isochronous mode? // if(ui32Register & USB_RXCSRH1_ISO) { *pui32Flags |= USB_EP_MODE_ISOC; } else { // // The hardware doesn't differentiate between bulk, interrupt // and control mode for the endpoint so we just set something // that isn't isochronous. This protocol ensures that anyone // modifying the returned flags in preparation for a call to // USBDevEndpointConfigSet do not see an unexpected mode change. // If they decode the returned mode, however, they may be in for // a surprise. // *pui32Flags |= USB_EP_MODE_BULK; } } } //***************************************************************************** // //! Sets the FIFO configuration for an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32FIFOAddress is the starting address for the FIFO. //! \param ui32FIFOSize is the size of the FIFO specified by one of the //! \b USB_FIFO_SZ_ values. //! \param ui32Flags specifies what information to set in the FIFO //! configuration. //! //! This function configures the starting FIFO RAM address and size of the FIFO //! for a specified endpoint. Endpoint zero does not have a dynamically //! configurable FIFO, so this function must not be called for endpoint zero. //! The \e ui32FIFOSize parameter must be one of the values in the //! \b USB_FIFO_SZ_ values. //! //! The \e ui32FIFOAddress value must be a multiple of 8 bytes and directly //! indicates the starting address in the USB controller's FIFO RAM. For //! example, a value of 64 indicates that the FIFO starts 64 bytes into //! the USB controller's FIFO memory. The \e ui32Flags value specifies whether //! the endpoint's OUT or IN FIFO must be configured. If in host mode, use //! \b USB_EP_HOST_OUT or \b USB_EP_HOST_IN, and if in device mode, use //! \b USB_EP_DEV_OUT or \b USB_EP_DEV_IN. //! //! \return None. // //***************************************************************************** void USBFIFOConfigSet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32FIFOAddress, uint32_t ui32FIFOSize, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // See if the transmit or receive FIFO is being configured. // if(ui32Flags & (USB_EP_HOST_OUT | USB_EP_DEV_IN)) { // // Set the transmit FIFO location and size for this endpoint. // _USBIndexWrite(ui32Base, ui32Endpoint >> 4, USB_O_TXFIFOSZ, ui32FIFOSize, 1); _USBIndexWrite(ui32Base, ui32Endpoint >> 4, USB_O_TXFIFOADD, ui32FIFOAddress >> 3, 2); } else { // // Set the receive FIFO location and size for this endpoint. // _USBIndexWrite(ui32Base, ui32Endpoint >> 4, USB_O_RXFIFOSZ, ui32FIFOSize, 1); _USBIndexWrite(ui32Base, ui32Endpoint >> 4, USB_O_RXFIFOADD, ui32FIFOAddress >> 3, 2); } } //***************************************************************************** // //! Returns the FIFO configuration for an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param pui32FIFOAddress is the starting address for the FIFO. //! \param pui32FIFOSize is the size of the FIFO as specified by one of the //! \b USB_FIFO_SZ_ values. //! \param ui32Flags specifies what information to retrieve from the FIFO //! configuration. //! //! This function returns the starting address and size of the FIFO for a //! specified endpoint. Endpoint zero does not have a dynamically configurable //! FIFO, so this function must not be called for endpoint zero. The //! \e ui32Flags parameter specifies whether the endpoint's OUT or IN FIFO must //! be read. If in host mode, the \e ui32Flags parameter must be //! \b USB_EP_HOST_OUT or \b USB_EP_HOST_IN, and if in device mode, the //! \e ui32Flags parameter must be either \b USB_EP_DEV_OUT or //! \b USB_EP_DEV_IN. //! //! \return None. // //***************************************************************************** void USBFIFOConfigGet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t *pui32FIFOAddress, uint32_t *pui32FIFOSize, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // See if the transmit or receive FIFO is being configured. // if(ui32Flags & (USB_EP_HOST_OUT | USB_EP_DEV_IN)) { // // Get the transmit FIFO location and size for this endpoint. // *pui32FIFOAddress = (_USBIndexRead(ui32Base, ui32Endpoint >> 4, (uint32_t)USB_O_TXFIFOADD, 2)) << 3; *pui32FIFOSize = _USBIndexRead(ui32Base, ui32Endpoint >> 4, (uint32_t)USB_O_TXFIFOSZ, 1); } else { // // Get the receive FIFO location and size for this endpoint. // *pui32FIFOAddress = (_USBIndexRead(ui32Base, ui32Endpoint >> 4, (uint32_t)USB_O_RXFIFOADD, 2)) << 3; *pui32FIFOSize = _USBIndexRead(ui32Base, ui32Endpoint >> 4, (uint32_t)USB_O_RXFIFOSZ, 1); } } //***************************************************************************** // //! Configure the DMA settings for an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Config specifies the configuration options for an endpoint. //! //! This function configures the DMA settings for a specified endpoint without //! changing other options that may already be configured. In order for the //! DMA transfer to be enabled, the USBEndpointDMAEnable() function must be //! called before starting the DMA transfer. The configuration //! options are passed in the \e ui32Config parameter and can have the values //! described below. //! //! One of the following values to specify direction: //! - \b USB_EP_HOST_OUT or \b USB_EP_DEV_IN - This setting is used with //! DMA transfers from memory to the USB controller. //! - \b USB_EP_HOST_IN or \b USB_EP_DEV_OUT - This setting is used with //! DMA transfers from the USB controller to memory. //! //! One of the following values: //! - \b USB_EP_DMA_MODE_0(default) - This setting is typically used for //! transfers that do not span multiple packets or when interrupts are //! required for each packet. //! - \b USB_EP_DMA_MODE_1 - This setting is typically used for //! transfers that span multiple packets and do not require interrupts //! between packets. //! //! Values only used with \b USB_EP_HOST_OUT or \b USB_EP_DEV_IN: //! - \b USB_EP_AUTO_SET - This setting is used to allow transmit DMA transfers //! to automatically be sent when a full packet is loaded into a FIFO. //! This is needed with \b USB_EP_DMA_MODE_1 to ensure that packets go //! out when the FIFO becomes full and the DMA has more data to send. //! //! Values only used with \b USB_EP_HOST_IN or \b USB_EP_DEV_OUT: //! - \b USB_EP_AUTO_CLEAR - This setting is used to allow receive DMA //! transfers to automatically be acknowledged as they are received. This is //! needed with \b USB_EP_DMA_MODE_1 to ensure that packets continue to //! be received and acknowledged when the FIFO is emptied by the DMA //! transfer. //! //! Values only used with \b USB_EP_HOST_IN: //! - \b USB_EP_AUTO_REQUEST - This setting is used to allow receive DMA //! transfers to automatically request a new IN transaction when the //! previous transfer has emptied the FIFO. This is typically used in //! conjunction with \b USB_EP_AUTO_CLEAR so that receive DMA transfers //! can continue without interrupting the main processor. //! //! \b Example: Set endpoint 1 receive endpoint to automatically acknowledge //! request and automatically generate a new IN request in host mode. //! //! \verbatim //! // //! // Configure endpoint 1 for receiving multiple packets using DMA. //! // //! USBEndpointDMAConfigSet(USB0_BASE, USB_EP_1, USB_EP_HOST_IN | //! USB_EP_DMA_MODE_1 | //! USB_EP_AUTO_CLEAR | //! USB_EP_AUTO_REQUEST); //! \endverbatim //! //! \b Example: Set endpoint 2 transmit endpoint to automatically send each //! packet in host mode when spanning multiple packets. //! //! \verbatim //! // //! // Configure endpoint 1 for transmitting multiple packets using DMA. //! // //! USBEndpointDMAConfigSet(USB0_BASE, USB_EP_2, USB_EP_HOST_OUT | //! USB_EP_DMA_MODE_1 | //! USB_EP_AUTO_SET); //! \endverbatim //! //! \return None. // //***************************************************************************** void USBEndpointDMAConfigSet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Config) { uint32_t ui32NewConfig; if(ui32Config & USB_EP_HOST_OUT) { // // Clear mode and DMA enable. // ui32NewConfig = (HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRH1) & ~(USB_TXCSRH1_DMAMOD | USB_TXCSRH1_AUTOSET)); if(ui32Config & USB_EP_DMA_MODE_1) { ui32NewConfig |= USB_TXCSRH1_DMAMOD; } if(ui32Config & USB_EP_AUTO_SET) { ui32NewConfig |= USB_TXCSRH1_AUTOSET; } HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRH1) = ui32NewConfig; } else { ui32NewConfig = (HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRH1) & ~(USB_RXCSRH1_AUTORQ | USB_RXCSRH1_AUTOCL | USB_RXCSRH1_DMAMOD)); if(ui32Config & USB_EP_DMA_MODE_1) { ui32NewConfig |= USB_RXCSRH1_DMAMOD; } if(ui32Config & USB_EP_AUTO_CLEAR) { ui32NewConfig |= USB_RXCSRH1_AUTOCL; } if(ui32Config & USB_EP_AUTO_REQUEST) { ui32NewConfig |= USB_RXCSRH1_AUTORQ; } HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRH1) = ui32NewConfig; } } //***************************************************************************** // //! Enable DMA on a specified endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags specifies which direction and what mode to use when //! enabling DMA. //! //! This function enables DMA on a specified endpoint and configures the mode //! according to the values in the \e ui32Flags parameter. The \e ui32Flags //! parameter must have \b USB_EP_DEV_IN or \b USB_EP_DEV_OUT set. Once this //! function is called the only DMA or error interrupts are generated by the //! USB controller. //! //! \note If this function is called when an endpoint is configured in DMA //! mode 0 the USB controller does not generate an interrupt. //! //! \return None. // //***************************************************************************** void USBEndpointDMAEnable(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // See if the transmit DMA is being enabled. // if(ui32Flags & USB_EP_DEV_IN) { // // Enable DMA on the transmit endpoint. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRH1) |= USB_TXCSRH1_DMAEN; } else { // // Enable DMA on the receive endpoint. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRH1) |= USB_RXCSRH1_DMAEN; } } //***************************************************************************** // //! Disable DMA on a specified endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags specifies which direction to disable. //! //! This function disables DMA on a specified endpoint to allow non-DMA USB //! transactions to generate interrupts normally. The \e ui32Flags parameter //! must be \b USB_EP_DEV_IN or \b USB_EP_DEV_OUT; all other bits are ignored. //! //! \return None. // //***************************************************************************** void USBEndpointDMADisable(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // If this was a request to disable DMA on the IN portion of the endpoint // then handle it. // if(ui32Flags & USB_EP_DEV_IN) { // // Just disable DMA leave the mode setting. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_TXCSRH1) &= ~USB_TXCSRH1_DMAEN; } else { // // Just disable DMA leave the mode setting. // HWREGB(ui32Base + EP_OFFSET(ui32Endpoint) + USB_O_RXCSRH1) &= ~USB_RXCSRH1_DMAEN; } } //***************************************************************************** // //! Determines the number of bytes of data available in a specified endpoint's //! FIFO. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! //! This function returns the number of bytes of data currently available in //! the FIFO for the specified receive (OUT) endpoint. It may be used prior to //! calling USBEndpointDataGet() to determine the size of buffer required to //! hold the newly-received packet. //! //! \return This call returns the number of bytes available in a specified endpoint //! FIFO. // //***************************************************************************** uint32_t USBEndpointDataAvail(uint32_t ui32Base, uint32_t ui32Endpoint) { uint32_t ui32Register; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Get the address of the receive status register to use, based on the // endpoint. // if(ui32Endpoint == USB_EP_0) { ui32Register = USB_O_CSRL0; } else { ui32Register = USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint); } // // Is there a packet ready in the FIFO? // if((HWREGH(ui32Base + ui32Register) & USB_CSRL0_RXRDY) == 0) { return(0); } // // Return the byte count in the FIFO. // return(HWREGH(ui32Base + USB_O_COUNT0 + ui32Endpoint)); } //***************************************************************************** // //! Retrieves data from the specified endpoint's FIFO. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param pui8Data is a pointer to the data area used to return the data from //! the FIFO. //! \param pui32Size is initially the size of the buffer passed into this call //! via the \e pui8Data parameter. It is set to the amount of data returned in //! the buffer. //! //! This function returns the data from the FIFO for the specified endpoint. //! The \e pui32Size parameter indicates the size of the buffer passed in //! the \e pui32Data parameter. The data in the \e pui32Size parameter is //! changed to match the amount of data returned in the \e pui8Data parameter. //! If a zero-byte packet is received, this call does not return an error but //! instead just returns a zero in the \e pui32Size parameter. The only error //! case occurs when there is no data packet available. //! //! \return This call returns 0, or -1 if no packet was received. // //***************************************************************************** int32_t USBEndpointDataGet(uint32_t ui32Base, uint32_t ui32Endpoint, uint8_t *pui8Data, uint32_t *pui32Size) { uint32_t ui32Register, ui32ByteCount, ui32FIFO; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Get the address of the receive status register to use, based on the // endpoint. // if(ui32Endpoint == USB_EP_0) { ui32Register = USB_O_CSRL0; } else { ui32Register = USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint); } // // Don't allow reading of data if the RxPktRdy bit is not set. // if((HWREGH(ui32Base + ui32Register) & USB_CSRL0_RXRDY) == 0) { // // Can't read the data because none is available. // *pui32Size = 0; // // Return a failure since there is no data to read. // return(-1); } // // Get the byte count in the FIFO. // ui32ByteCount = HWREGH(ui32Base + USB_O_COUNT0 + ui32Endpoint); // // Determine how many bytes are copied. // ui32ByteCount = (ui32ByteCount < *pui32Size) ? ui32ByteCount : *pui32Size; // // Return the number of bytes we are going to read. // *pui32Size = ui32ByteCount; // // Calculate the FIFO address. // ui32FIFO = ui32Base + USB_O_FIFO0 + (ui32Endpoint >> 2); // // Read the data out of the FIFO. // for(; ui32ByteCount > 0; ui32ByteCount--) { // // Read a byte at a time from the FIFO. // *pui8Data++ = HWREGB(ui32FIFO); } // // Success. // return(0); } //***************************************************************************** // //! Acknowledge that data was read from the specified endpoint's FIFO in device //! mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param bIsLastPacket indicates if this packet is the last one. //! //! This function acknowledges that the data was read from the endpoint's FIFO. //! The \e bIsLastPacket parameter is set to a \b true value if this is the //! last in a series of data packets on endpoint zero. The \e bIsLastPacket //! parameter is not used for endpoints other than endpoint zero. This call //! can be used if processing is required between reading the data and //! acknowledging that the data has been read. //! //! \note This function must only be called in device mode. //! //! \return None. // //***************************************************************************** void USBDevEndpointDataAck(uint32_t ui32Base, uint32_t ui32Endpoint, bool bIsLastPacket) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Determine which endpoint is being acked. // if(ui32Endpoint == USB_EP_0) { // // Clear RxPktRdy, and optionally DataEnd, on endpoint zero. // HWREGB(ui32Base + USB_O_CSRL0) = USB_CSRL0_RXRDYC | (bIsLastPacket ? USB_CSRL0_DATAEND : 0); } else { // // Clear RxPktRdy on all other endpoints. // HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~(USB_RXCSRL1_RXRDY); } } //***************************************************************************** // //! Acknowledge that data was read from the specified endpoint's FIFO in host //! mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! //! This function acknowledges that the data was read from the endpoint's FIFO. //! This call is used if processing is required between reading the data and //! acknowledging that the data has been read. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostEndpointDataAck(uint32_t ui32Base, uint32_t ui32Endpoint) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Clear RxPktRdy. // if(ui32Endpoint == USB_EP_0) { HWREGB(ui32Base + USB_O_CSRL0) &= ~USB_CSRL0_RXRDY; } else { HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) &= ~(USB_RXCSRL1_RXRDY); } } //***************************************************************************** // //! Puts data into the specified endpoint's FIFO. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param pui8Data is a pointer to the data area used as the source for the //! data to put into the FIFO. //! \param ui32Size is the amount of data to put into the FIFO. //! //! This function puts the data from the \e pui8Data parameter into the FIFO //! for this endpoint. If a packet is already pending for transmission, then //! this call does not put any of the data into the FIFO and returns -1. Care //! must be taken to not write more data than can fit into the FIFO //! allocated by the call to USBFIFOConfigSet(). //! //! \return This call returns 0 on success, or -1 to indicate that the FIFO //! is in use and cannot be written. // //***************************************************************************** int32_t USBEndpointDataPut(uint32_t ui32Base, uint32_t ui32Endpoint, uint8_t *pui8Data, uint32_t ui32Size) { uint32_t ui32FIFO; uint8_t ui8TxPktRdy; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Get the bit position of TxPktRdy based on the endpoint. // if(ui32Endpoint == USB_EP_0) { ui8TxPktRdy = USB_CSRL0_TXRDY; } else { ui8TxPktRdy = USB_TXCSRL1_TXRDY; } // // Don't allow transmit of data if the TxPktRdy bit is already set. // if(HWREGB(ui32Base + USB_O_CSRL0 + ui32Endpoint) & ui8TxPktRdy) { return(-1); } // // Calculate the FIFO address. // ui32FIFO = ui32Base + USB_O_FIFO0 + (ui32Endpoint >> 2); // // Write the data to the FIFO. // for(; ui32Size > 0; ui32Size--) { HWREGB(ui32FIFO) = *pui8Data++; } // // Success. // return(0); } //***************************************************************************** // //! Starts the transfer of data from an endpoint's FIFO. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32TransType is set to indicate what type of data is being sent. //! //! This function starts the transfer of data from the FIFO for a specified //! endpoint. This function is called if the \b USB_EP_AUTO_SET bit was //! not enabled for the endpoint. Setting the \e ui32TransType parameter //! allows the appropriate signaling on the USB bus for the type of transaction //! being requested. The \e ui32TransType parameter must be one of the //! following: //! //! - \b USB_TRANS_OUT for OUT transaction on any endpoint in host mode. //! - \b USB_TRANS_IN for IN transaction on any endpoint in device mode. //! - \b USB_TRANS_IN_LAST for the last IN transaction on endpoint zero in a //! sequence of IN transactions. //! - \b USB_TRANS_SETUP for setup transactions on endpoint zero. //! - \b USB_TRANS_STATUS for status results on endpoint zero. //! //! \return This call returns 0 on success, or -1 if a transmission is already //! in progress. // //***************************************************************************** int32_t USBEndpointDataSend(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32TransType) { uint32_t ui32TxPktRdy; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Get the bit position of TxPktRdy based on the endpoint. // if(ui32Endpoint == USB_EP_0) { // // Don't allow transmit of data if the TxPktRdy bit is already set. // if(HWREGB(ui32Base + USB_O_CSRL0) & USB_CSRL0_TXRDY) { return(-1); } ui32TxPktRdy = ui32TransType & 0xff; } else { // // Don't allow transmit of data if the TxPktRdy bit is already set. // if(HWREGB(ui32Base + USB_O_CSRL0 + ui32Endpoint) & USB_TXCSRL1_TXRDY) { return(-1); } ui32TxPktRdy = (ui32TransType >> 8) & 0xff; } // // Set TxPktRdy in order to send the data. // HWREGB(ui32Base + USB_O_CSRL0 + ui32Endpoint) = ui32TxPktRdy; // // Success. // return(0); } //***************************************************************************** // //! Forces a flush of an endpoint's FIFO. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags specifies if the IN or OUT endpoint is accessed. //! //! This function forces the USB controller to flush out the data in the FIFO. //! The function can be called with either host or device controllers and //! requires the \e ui32Flags parameter be one of \b USB_EP_HOST_OUT, //! \b USB_EP_HOST_IN, \b USB_EP_DEV_OUT, or \b USB_EP_DEV_IN. //! //! \return None. // //***************************************************************************** void USBFIFOFlush(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Endpoint zero has a different register set for FIFO flushing. // if(ui32Endpoint == USB_EP_0) { // // Nothing in the FIFO if neither of these bits are set. // if((HWREGB(ui32Base + USB_O_CSRL0) & (USB_CSRL0_RXRDY | USB_CSRL0_TXRDY)) != 0) { // // Hit the Flush FIFO bit. // HWREGB(ui32Base + USB_O_CSRH0) = USB_CSRH0_FLUSH; } } else { // // Only reset the IN or OUT FIFO. // if(ui32Flags & (USB_EP_HOST_OUT | USB_EP_DEV_IN)) { // // Make sure the FIFO is not empty. // if(HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) & USB_TXCSRL1_TXRDY) { // // Hit the Flush FIFO bit. // HWREGB(ui32Base + USB_O_TXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_TXCSRL1_FLUSH; } } else { // // Make sure that the FIFO is not empty. // if(HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) & USB_RXCSRL1_RXRDY) { // // Hit the Flush FIFO bit. // HWREGB(ui32Base + USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint)) |= USB_RXCSRL1_FLUSH; } } } } //***************************************************************************** // //! Schedules a request for an IN transaction on an endpoint in host mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! //! This function schedules a request for an IN transaction. When the USB //! device being communicated with responds with the data, the data can be //! retrieved by calling USBEndpointDataGet() or via a DMA transfer. //! //! \note This function must only be called in host mode and only for IN //! endpoints. //! //! \return None. // //***************************************************************************** void USBHostRequestIN(uint32_t ui32Base, uint32_t ui32Endpoint) { uint32_t ui32Register; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Endpoint zero uses a different offset than the other endpoints. // if(ui32Endpoint == USB_EP_0) { ui32Register = USB_O_CSRL0; } else { ui32Register = USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint); } // // Set the request for an IN transaction. // HWREGB(ui32Base + ui32Register) = USB_RXCSRL1_REQPKT; } //***************************************************************************** // //! Clears a scheduled IN transaction for an endpoint in host mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! //! This function clears a previously scheduled IN transaction if it is still //! pending. This function is used to safely disable any scheduled IN //! transactions if the endpoint specified by \e ui32Endpoint is reconfigured //! for communications with other devices. //! //! \note This function must only be called in host mode and only for IN //! endpoints. //! //! \return None. // //***************************************************************************** void USBHostRequestINClear(uint32_t ui32Base, uint32_t ui32Endpoint) { uint32_t ui32Register; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // Endpoint zero uses a different offset than the other endpoints. // if(ui32Endpoint == USB_EP_0) { ui32Register = USB_O_CSRL0; } else { ui32Register = USB_O_RXCSRL1 + EP_OFFSET(ui32Endpoint); } // // Clear the request for an IN transaction. // HWREGB(ui32Base + ui32Register) &= ~USB_RXCSRL1_REQPKT; } //***************************************************************************** // //! Issues a request for a status IN transaction on endpoint zero. //! //! \param ui32Base specifies the USB module base address. //! //! This function is used to cause a request for a status IN transaction from //! a device on endpoint zero. This function can only be used with endpoint //! zero as that is the only control endpoint that supports this ability. This //! function is used to complete the last phase of a control transaction to a //! device and an interrupt is signaled when the status packet has been //! received. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostRequestStatus(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Set the request for a status IN transaction. // HWREGB(ui32Base + USB_O_CSRL0) = USB_CSRL0_REQPKT | USB_CSRL0_STATUS; } //***************************************************************************** // //! Sets the functional address for the device that is connected to an //! endpoint in host mode. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Addr is the functional address for the controller to use for //! this endpoint. //! \param ui32Flags determines if this is an IN or an OUT endpoint. //! //! This function configures the functional address for a device that is using //! this endpoint for communication. This \e ui32Addr parameter is the address //! of the target device that this endpoint is communicating with. The //! \e ui32Flags parameter indicates if the IN or OUT endpoint is set. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostAddrSet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Addr, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // See if the transmit or receive address is set. // if(ui32Flags & USB_EP_HOST_OUT) { // // Set the transmit address. // HWREGB(ui32Base + USB_O_TXFUNCADDR0 + (ui32Endpoint >> 1)) = ui32Addr; } else { // // Set the receive address. // HWREGB(ui32Base + USB_O_TXFUNCADDR0 + 4 + (ui32Endpoint >> 1)) = ui32Addr; } } //***************************************************************************** // //! Gets the current functional device address for an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags determines if this is an IN or an OUT endpoint. //! //! This function returns the current functional address that an endpoint is //! using to communicate with a device. The \e ui32Flags parameter determines //! if the IN or OUT endpoint's device address is returned. //! //! \note This function must only be called in host mode. //! //! \return Returns the current function address being used by an endpoint. // //***************************************************************************** uint32_t USBHostAddrGet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // See if the transmit or receive address is returned. // if(ui32Flags & USB_EP_HOST_OUT) { // // Return this endpoint's transmit address. // return(HWREGB(ui32Base + USB_O_TXFUNCADDR0 + (ui32Endpoint >> 1))); } else { // // Return this endpoint's receive address. // return(HWREGB(ui32Base + USB_O_TXFUNCADDR0 + 4 + (ui32Endpoint >> 1))); } } //***************************************************************************** // //! Sets the hub address for the device that is connected to an endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Addr is the hub address and port for the device using this //! endpoint. The hub address must be defined in bits 0 through 6 with the //! port number in bits 8 through 14. //! \param ui32Flags determines if this is an IN or an OUT endpoint. //! //! This function configures the hub address for a device that is using this //! endpoint for communication. The \e ui32Flags parameter determines if the //! device address for the IN or the OUT endpoint is configured by this call //! and sets the speed of the downstream device. Valid values are one of //! \b USB_EP_HOST_OUT or \b USB_EP_HOST_IN optionally ORed with //! \b USB_EP_SPEED_LOW. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostHubAddrSet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Addr, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // See if the hub transmit or receive address is being set. // if(ui32Flags & USB_EP_HOST_OUT) { // // Set the hub transmit address and port number for this endpoint. // HWREGH(ui32Base + USB_O_TXHUBADDR0 + (ui32Endpoint >> 1)) = ui32Addr; } else { // // Set the hub receive address and port number for this endpoint. // HWREGH(ui32Base + USB_O_TXHUBADDR0 + 4 + (ui32Endpoint >> 1)) = ui32Addr; } // // Set the speed of communication for endpoint 0. This configuration is // done here because it changes on a transaction-by-transaction basis for // EP0. For other endpoints, this is set in USBHostEndpointConfig(). // if(ui32Endpoint == USB_EP_0) { if(ui32Flags & USB_EP_SPEED_FULL) { HWREGB(ui32Base + USB_O_TYPE0) = USB_TYPE0_SPEED_FULL; } else if(ui32Flags & USB_EP_SPEED_HIGH) { HWREGB(ui32Base + USB_O_TYPE0) = USB_TYPE0_SPEED_HIGH; } else { HWREGB(ui32Base + USB_O_TYPE0) = USB_TYPE0_SPEED_LOW; } } } //***************************************************************************** // //! Gets the current device hub address for this endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint to access. //! \param ui32Flags determines if this is an IN or an OUT endpoint. //! //! This function returns the current hub address that an endpoint is using //! to communicate with a device. The \e ui32Flags parameter determines if the //! device address for the IN or OUT endpoint is returned. //! //! \note This function must only be called in host mode. //! //! \return This function returns the current hub address being used by an //! endpoint. // //***************************************************************************** uint32_t USBHostHubAddrGet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_0) || (ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); // // See if the hub transmit or receive address is returned. // if(ui32Flags & USB_EP_HOST_OUT) { // // Return the hub transmit address for this endpoint. // return(HWREGB(ui32Base + USB_O_TXHUBADDR0 + (ui32Endpoint >> 1))); } else { // // Return the hub receive address for this endpoint. // return(HWREGB(ui32Base + USB_O_TXHUBADDR0 + 4 + (ui32Endpoint >> 1))); } } //***************************************************************************** // //! Sets the configuration for USB power fault. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Flags specifies the configuration of the power fault. //! //! This function controls how the USB controller uses its external power //! control pins (USBnPFLT and USBnEPEN). The flags specify the power //! fault level sensitivity, the power fault action, and the power enable level //! and source. //! //! One of the following can be selected as the power fault level sensitivity: //! //! - \b USB_HOST_PWRFLT_LOW - An external power fault is indicated by the pin //! being driven low. //! - \b USB_HOST_PWRFLT_HIGH - An external power fault is indicated by the pin //! being driven high. //! //! One of the following can be selected as the power fault action: //! //! - \b USB_HOST_PWRFLT_EP_NONE - No automatic action when power fault //! detected. //! - \b USB_HOST_PWRFLT_EP_TRI - Automatically tri-state the USBnEPEN pin on a //! power fault. //! - \b USB_HOST_PWRFLT_EP_LOW - Automatically drive USBnEPEN pin low on a //! power fault. //! - \b USB_HOST_PWRFLT_EP_HIGH - Automatically drive USBnEPEN pin high on a //! power fault. //! //! One of the following can be selected as the power enable level and source: //! //! - \b USB_HOST_PWREN_MAN_LOW - USBnEPEN is driven low by the USB controller //! when USBHostPwrEnable() is called. //! - \b USB_HOST_PWREN_MAN_HIGH - USBnEPEN is driven high by the USB //! controller when USBHostPwrEnable() is //! called. //! - \b USB_HOST_PWREN_AUTOLOW - USBnEPEN is driven low by the USB controller //! automatically if USBOTGSessionRequest() has //! enabled a session. //! - \b USB_HOST_PWREN_AUTOHIGH - USBnEPEN is driven high by the USB //! controller automatically if //! USBOTGSessionRequest() has enabled a //! session. //! //! When using the VBUS glitch filter, the \b USB_HOST_PWREN_FILTER can be //! addded to ignore small, short drops in VBUS level caused by high power //! consumption. This feature is mainly used to avoid causing VBUS errors //! caused by devices with high in-rush current. //! //! \note This function must only be called on microcontrollers that support //! host mode or OTG operation. The \b USB_HOST_PWREN_AUTOLOW and //! \b USB_HOST_PWREN_AUTOHIGH parameters can only be specified on devices that //! support OTG operation. //! //! \return None. // //***************************************************************************** void USBHostPwrConfig(uint32_t ui32Base, uint32_t ui32Flags) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Flags & ~(USB_HOST_PWREN_FILTER | USB_EPC_PFLTACT_M | USB_EPC_PFLTAEN | USB_EPC_PFLTSEN_HIGH | USB_EPC_EPEN_M)) == 0); // // If requested, enable VBUS droop detection on parts that support this // feature. // HWREG(ui32Base + USB_O_VDC) = ui32Flags >> 16; // // Set the power fault configuration as specified. This configuration // does not change whether fault detection is enabled or not. // HWREGH(ui32Base + USB_O_EPC) = (ui32Flags | (HWREGH(ui32Base + USB_O_EPC) & ~(USB_EPC_PFLTACT_M | USB_EPC_PFLTAEN | USB_EPC_PFLTSEN_HIGH | USB_EPC_EPEN_M))); } //***************************************************************************** // //! Enables power fault detection. //! //! \param ui32Base specifies the USB module base address. //! //! This function enables power fault detection in the USB controller. If the //! USBnPFLT pin is not in use, this function must not be used. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostPwrFaultEnable(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Enable power fault input. // HWREGH(ui32Base + USB_O_EPC) |= USB_EPC_PFLTEN; } //***************************************************************************** // //! Disables power fault detection. //! //! \param ui32Base specifies the USB module base address. //! //! This function disables power fault detection in the USB controller. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostPwrFaultDisable(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Enable power fault input. // HWREGH(ui32Base + USB_O_EPC) &= ~USB_EPC_PFLTEN; } //***************************************************************************** // //! Enables the external power pin. //! //! \param ui32Base specifies the USB module base address. //! //! This function enables the USBnEPEN signal, which enables an external power //! supply in host mode operation. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostPwrEnable(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Enable the external power supply enable signal. // HWREGH(ui32Base + USB_O_EPC) |= USB_EPC_EPENDE; } //***************************************************************************** // //! Disables the external power pin. //! //! \param ui32Base specifies the USB module base address. //! //! This function disables the USBnEPEN signal, which disables an external //! power supply in host mode operation. //! //! \note This function must only be called in host mode. //! //! \return None. // //***************************************************************************** void USBHostPwrDisable(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Disable the external power supply enable signal. // HWREGH(ui32Base + USB_O_EPC) &= ~USB_EPC_EPENDE; } //***************************************************************************** // //! Gets the current frame number. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the last frame number received. //! //! \return The last frame number received. // //***************************************************************************** uint32_t USBFrameNumberGet(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Return the most recent frame number. // return(HWREGH(ui32Base + USB_O_FRAME)); } //***************************************************************************** // //! Starts or ends a session. //! //! \param ui32Base specifies the USB module base address. //! \param bStart specifies if this call starts or ends a session. //! //! This function is used in OTG mode to start a session request or end a //! session. If the \e bStart parameter is set to \b true, then this function //! starts a session and if it is \b false it ends a session. //! //! \return None. // //***************************************************************************** void USBOTGSessionRequest(uint32_t ui32Base, bool bStart) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Start or end the session as directed. // if(bStart) { HWREGB(ui32Base + USB_O_DEVCTL) |= USB_DEVCTL_SESSION; } else { HWREGB(ui32Base + USB_O_DEVCTL) &= ~USB_DEVCTL_SESSION; } } //***************************************************************************** // //! Returns the absolute FIFO address for a specified endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint specifies which endpoint's FIFO address to return. //! //! This function returns the actual physical address of the FIFO. This //! address is needed when the USB is going to be used with the uDMA //! controller and the source or destination address must be set to the //! physical FIFO address for a specified endpoint. This function can also be //! used to provide the physical address to manually read data from an //! endpoints FIFO. //! //! \return None. // //***************************************************************************** uint32_t USBFIFOAddrGet(uint32_t ui32Base, uint32_t ui32Endpoint) { // // Return the FIFO address for this endpoint. // return(ui32Base + USB_O_FIFO0 + (ui32Endpoint >> 2)); } //***************************************************************************** // //! Returns the current operating mode of the controller. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current operating mode on USB controllers with //! OTG or Dual mode functionality. //! //! For OTG controllers: //! //! The function returns one of the following values on OTG controllers: //! //! \b USB_OTG_MODE_ASIDE_HOST indicates that the controller is in host mode //! on the A-side of the cable. //! //! \b USB_OTG_MODE_ASIDE_DEV indicates that the controller is in device mode //! on the A-side of the cable. //! //! \b USB_OTG_MODE_BSIDE_HOST indicates that the controller is in host mode //! on the B-side of the cable. //! //! \b USB_OTG_MODE_BSIDE_DEV indicates that the controller is in device mode //! on the B-side of the cable. If an OTG session request is started with no //! cable in place, this mode is the default. //! //! \b USB_OTG_MODE_NONE indicates that the controller is not attempting to //! determine its role in the system. //! //! For Dual Mode controllers: //! //! The function returns one of the following values: //! //! \b USB_DUAL_MODE_HOST indicates that the controller is acting as a host. //! //! \b USB_DUAL_MODE_DEVICE indicates that the controller acting as a device. //! //! \b USB_DUAL_MODE_NONE indicates that the controller is not active as //! either a host or device. //! //! \return Returns \b USB_OTG_MODE_ASIDE_HOST, \b USB_OTG_MODE_ASIDE_DEV, //! \b USB_OTG_MODE_BSIDE_HOST, \b USB_OTG_MODE_BSIDE_DEV, //! \b USB_OTG_MODE_NONE, \b USB_DUAL_MODE_HOST, \b USB_DUAL_MODE_DEVICE, or //! \b USB_DUAL_MODE_NONE. // //***************************************************************************** uint32_t USBModeGet(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Checks the current mode in the USB_O_DEVCTL and returns the current // mode. // // USB_OTG_MODE_ASIDE_HOST: USB_DEVCTL_HOST | USB_DEVCTL_SESSION // USB_OTG_MODE_ASIDE_DEV: USB_DEVCTL_SESSION // USB_OTG_MODE_BSIDE_HOST: USB_DEVCTL_DEV | USB_DEVCTL_SESSION | // USB_DEVCTL_HOST // USB_OTG_MODE_BSIDE_DEV: USB_DEVCTL_DEV | USB_DEVCTL_SESSION // USB_OTG_MODE_NONE: USB_DEVCTL_DEV // return(HWREGB(ui32Base + USB_O_DEVCTL) & (USB_DEVCTL_DEV | USB_DEVCTL_HOST | USB_DEVCTL_SESSION | USB_DEVCTL_VBUS_M)); } //***************************************************************************** // //! Sets the DMA channel to use for a specified endpoint. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint specifies which endpoint's FIFO address to return. //! \param ui32Channel specifies which DMA channel to use for which endpoint. //! //! This function is used to configure which DMA channel to use with a specified //! endpoint. Receive DMA channels can only be used with receive endpoints //! and transmit DMA channels can only be used with transmit endpoints. As a //! result, the 3 receive and 3 transmit DMA channels can be mapped to any //! endpoint other than 0. The values that are passed into the //! \e ui32Channel value are the UDMA_CHANNEL_USBEP* values defined in udma.h. //! //! \note This function only has an effect on microcontrollers that have the //! ability to change the DMA channel for an endpoint. Calling this function //! on other devices has no effect. //! //! \return None. //! //***************************************************************************** void USBEndpointDMAChannel(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Channel) { uint32_t ui32Mask; // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); ASSERT((ui32Endpoint == USB_EP_1) || (ui32Endpoint == USB_EP_2) || (ui32Endpoint == USB_EP_3) || (ui32Endpoint == USB_EP_4) || (ui32Endpoint == USB_EP_5) || (ui32Endpoint == USB_EP_6) || (ui32Endpoint == USB_EP_7)); ASSERT(ui32Channel <= UDMA_CHANNEL_USBEP3TX); // // The input select mask must be shifted into the correct position // based on the channel. // ui32Mask = 0xf << (ui32Channel * 4); // // Clear out the current selection for the channel. // ui32Mask = HWREG(ui32Base + USB_O_DMASEL) & (~ui32Mask); // // The input select is now shifted into the correct position based on the // channel. // ui32Mask |= (USBEPToIndex(ui32Endpoint)) << (ui32Channel * 4); // // Write the value out to the register. // HWREG(ui32Base + USB_O_DMASEL) = ui32Mask; } //***************************************************************************** // //! Change the mode of the USB controller to host. //! //! \param ui32Base specifies the USB module base address. //! //! This function changes the mode of the USB controller to host mode. //! //! \note This function must only be called on microcontrollers that support //! OTG operation. //! //! \return None. // //***************************************************************************** void USBHostMode(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Force mode in OTG parts that support forcing USB controller mode. // This bit is not writable in USB controllers that do not support // forcing the mode. Not setting the USB_GPCS_DEVMOD bit makes this a // force of host mode. // HWREGB(ui32Base + USB_O_GPCS) = USB_GPCS_DEVMODOTG; } //***************************************************************************** // //! Change the mode of the USB controller to device. //! //! \param ui32Base specifies the USB module base address. //! //! This function changes the mode of the USB controller to device mode. //! //! \note This function must only be called on microcontrollers that support //! OTG operation. //! //! \return None. // //***************************************************************************** void USBDevMode(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Set the USB controller mode to device. // HWREGB(ui32Base + USB_O_GPCS) = USB_GPCS_DEVMODOTG | USB_GPCS_DEVMOD; } //***************************************************************************** // //! Changes the mode of the USB controller to OTG. //! //! \param ui32Base specifies the USB module base address. //! //! This function changes the mode of the USB controller to OTG mode. This //! function is only valid on microcontrollers that have the OTG capabilities. //! //! \return None. // //***************************************************************************** void USBOTGMode(uint32_t ui32Base) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); // // Disable the override of the USB controller mode when running on an OTG // device. // HWREGB(ui32Base + USB_O_GPCS) = 0; } //***************************************************************************** // //! Change the operating mode of the USB controller. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Mode specifies the operating mode of the USB OTG pins. //! //! This function changes the operating modes of the USB controller. When //! operating in full OTG mode, the USB controller uses the VBUS and ID pins to //! detect mode and voltage changes. While these pins are primarily used in //! OTG mode, they can also affect the operation of host and device modes. In //! device mode, the USB controller can be configured to monitor or ignore //! VBUS. Monitoring VBUS allows the controller to determine if it has been //! disconnected from the host. In host mode, the USB controller uses the //! VBUS pin to detect loss of VBUS caused by excessive power draw due to a //! drop in the VBUS voltage. This call takes the place of USBHostMode(), //! USBDevMode(), and USBOTGMode(). The \e ui32Mode value should be one of //! the following values: //! //! - \b USB_MODE_OTG enables operating in full OTG mode, VBUS and ID are //! used by the controller. //! - \b USB_MODE_HOST enables operating only as a host with no monitoring of //! VBUS or ID pins. //! - \b USB_MODE_HOST_VBUS enables operating only as a host with monitoring of //! VBUS pin. This configuration enables detection of VBUS droop while still //! forcing host mode. //! - \b USB_MODE_DEVICE enables operating only as a device with no monitoring //! of VBUS or ID pins. //! - \b USB_MODE_DEVICE_VBUS enables operating only as a device with //! monitoring of VBUS pin. This configuration enables disconnect detection //! while still forcing device mode. //! //! \note Some of the options above are not available on some Tiva devices. //! Please check the data sheet to determine if the USB controller supports a //! particular mode. //! //! \b Example: Force device mode but allow monitoring of the USB VBUS pin. //! //! \verbatim //! // //! // Force device mode but allow monitoring of VBUS for disconnect. //! // //! USBModeConfig(USB_MODE_DEVICE_VBUS); //! \endverbatim //! //! \return None. // //***************************************************************************** void USBModeConfig(uint32_t ui32Base, uint32_t ui32Mode) { // // Check the arguments. // ASSERT(ui32Base == USB0_BASE); HWREG(ui32Base + USB_O_GPCS) = ui32Mode; } //***************************************************************************** // //! Powers off the internal USB PHY. //! //! \param ui32Base specifies the USB module base address. //! //! This function powers off the internal USB PHY, reducing the current //! consumption of the device. While in the powered-off state, the USB //! controller is unable to operate. //! //! \return None. // //***************************************************************************** void USBPHYPowerOff(uint32_t ui32Base) { // // Set the PWRDNPHY bit in the PHY, putting it into its low power mode. // HWREGB(ui32Base + USB_O_POWER) |= USB_POWER_PWRDNPHY; } //***************************************************************************** // //! Powers on the internal USB PHY. //! //! \param ui32Base specifies the USB module base address. //! //! This function powers on the internal USB PHY, enabling it return to normal //! operation. By default, the PHY is powered on, so this function must //! only be called if USBPHYPowerOff() has previously been called. //! //! \return None. // //***************************************************************************** void USBPHYPowerOn(uint32_t ui32Base) { // // Clear the PWRDNPHY bit in the PHY, putting it into normal operating // mode. // HWREGB(ui32Base + USB_O_POWER) &= ~USB_POWER_PWRDNPHY; } //***************************************************************************** // //! Sets the number of packets to request when transferring multiple bulk //! packets. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Endpoint is the endpoint index to target for this write. //! \param ui32Count is the number of packets to request. //! //! This function sets the number of consecutive bulk packets to request //! when transferring multiple bulk packets with DMA. //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBEndpointPacketCountSet(uint32_t ui32Base, uint32_t ui32Endpoint, uint32_t ui32Count) { HWREG(ui32Base + USB_O_RQPKTCOUNT1 + (0x4 * (USBEPToIndex(ui32Endpoint) - 1))) = ui32Count; } //***************************************************************************** // //! Returns the number of USB endpoint pairs on the device. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the number of endpoint pairs supported by the USB //! controller corresponding to the passed base address. The value returned is //! the number of IN or OUT endpoints available and does not include endpoint 0 //! (the control endpoint). For example, if 15 is returned, there are 15 IN //! and 15 OUT endpoints available in addition to endpoint 0. //! //! \return Returns the number of IN or OUT endpoints available. // //***************************************************************************** uint32_t USBNumEndpointsGet(uint32_t ui32Base) { // // Read the number of endpoints from the hardware. The number of TX and // RX endpoints are always the same. // return(HWREGB(ui32Base + USB_O_EPINFO) & USB_EPINFO_TXEP_M); } //***************************************************************************** // //! Returns the version of the USB controller. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the version number of the USB controller, which can //! be be used to adjust for slight differences between the USB controllers in //! the Tiva family. The values that are returned are //! \b USB_CONTROLLER_VER_0 and \b USB_CONTROLLER_VER_1. //! //! \note The most significant difference between \b USB_CONTROLLER_VER_0 and //! \b USB_CONTROLLER_VER_1 is that \b USB_CONTROLLER_VER_1 supports the USB //! controller's own bus master DMA controller, while the //! \b USB_CONTROLLER_VER_0 only supports using the uDMA controller with the //! USB module. //! //! \b Example: Get the version of the Tiva USB controller. //! //! \verbatim //! uint32_t ui32Version; //! //! // //! // Retrieve the version of the Tiva USB controller. //! // //! ui32Version = USBControllerVersion(USB0_BASE); //! \endverbatim //! //! \return This function returns one of the \b USB_CONTROLLER_VER_ values. // //***************************************************************************** uint32_t USBControllerVersion(uint32_t ui32Base) { // // Return the type field of the peripheral properties. This returns // zero for all parts that did not have a peripheral property. // return(HWREG(ui32Base + USB_O_PP) & USB_PP_TYPE_M); } //***************************************************************************** // //! Configures and enables the clocking to the USB controller's PHY. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Div specifies the divider for the internal USB PHY clock. //! \param ui32Flags configures the internal USB PHY clock and specifies the //! clock source for a ULPI-connected PHY. //! //! This function configures and enables the USB PHY clock. In addition, for //! systems that use a ULPI-connected external PHY, this function configures //! the source for the PHY clock. The \e ui32Flags parameter specifies the //! clock source with the following values: //! //! - \b USB_CLOCK_INTERNAL uses the internal PLL combined with the \e ui32Div //! value to generate the USB clock that is used by the internal USB PHY. In //! addition, when using an external ULPI-connected USB PHY, the specified //! clock is output on the USB0CLK pin. //! - \b USB_CLOCK_EXTERNAL specifies that USB0CLK is an input from the //! ULPI-connected external PHY. //! //! The \e ui32Div parameter is used to specify a divider for the internal //! clock if the \b USB_CLOCK_INTERNAL is specified and is ignored if //! \b USB_CLOCK_EXTERNAL is specified. When the \b USB_CLOCK_INTERNAL is //! specified, the \e ui32Div value must be set so that the PLL_VCO/\e ui32Div //! results in a 60-MHz clock. //! //! \b Example: Enable the USB clock with a 480-MHz PLL setting. //! //! \verbatim //! // //! // Enable the USB clock using a 480-MHz PLL. //! // (480-MHz/8 = 60-MHz) //! // //! USBClockEnable(USB0_BASE, 8, USB_CLOCK_INTERNAL); //! \endverbatim //! //! \note The ability to configure the USB PHY clock is not available on //! all Tiva devices. Please consult the data sheet for the Tiva //! device that you are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBClockEnable(uint32_t ui32Base, uint32_t ui32Div, uint32_t ui32Flags) { ASSERT(ui32Base == USB0_BASE); // // Configure and enable the USB clock input. // HWREG(ui32Base + USB_O_CC) = (ui32Div - 1) | ui32Flags; } //***************************************************************************** // //! Disables the clocking of the USB controller's PHY. //! //! \param ui32Base specifies the USB module base address. //! //! This function disables the USB PHY clock. This function should not be //! called in applications where the USB controller is used. //! //! \b Example: Disable the USB PHY clock input. //! //! \verbatim //! // //! // Disable clocking of the USB controller's PHY. //! // //! USBClockDisable(USB0_BASE); //! \endverbatim //! //! \note The ability to configure the USB PHY clock is not available on all //! Tiva devices. Please consult the data sheet for the Tiva device //! that you are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBClockDisable(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); // // Disable the USB clock input. // HWREG(ui32Base + USB_O_CC) = 0; } //***************************************************************************** // // Close the Doxygen group. //! @} // //***************************************************************************** //***************************************************************************** // //! \addtogroup usb_dma //! @{ // //***************************************************************************** //***************************************************************************** // //! Enable interrupts for a specified integrated USB DMA channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which DMA channel interrupt to enable. //! //! This function enables the USB DMA channel interrupt based on the //! \e ui32Channel parameter. The \e ui32Channel value is a zero-based //! index of the USB DMA channel. Once enabled, the USBDMAChannelIntStatus() //! function returns if a DMA channel has generated an interrupt. //! //! \b Example: Enable the USB DMA channel 3 interrupt. //! //! \verbatim //! // //! // Enable the USB DMA channel 3 interrupt //! // //! USBDMAChannelIntEnable(USB0_BASE, 3); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelIntEnable(uint32_t ui32Base, uint32_t ui32Channel) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Enable the specified DMA channel interrupts. // HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) |= USB_DMACTL0_IE; } //***************************************************************************** // //! Disable interrupts for a specified integrated USB DMA channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which USB DMA channel interrupt to disable. //! //! This function disables the USB DMA channel interrupt based on the //! \e ui32Channel parameter. The \e ui32Channel value is a zero-based //! index of the USB DMA channel. //! //! \b Example: Disable the USB DMA channel 3 interrupt. //! //! \verbatim //! // //! // Disable the USB DMA channel 3 interrupt //! // //! USBDMAChannelIntDisable(USB0_BASE, 3); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelIntDisable(uint32_t ui32Base, uint32_t ui32Channel) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Enable the specified DMA channel interrupts. // HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) &= ~USB_DMACTL0_IE; } //***************************************************************************** // //! Return the current status of the integrated USB DMA interrupts. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current bit-mapped interrupt status for all USB //! DMA channel interrupt sources. Calling this function automatically clears //! all currently pending USB DMA interrupts. //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \b Example: Get the pending USB DMA interrupts. //! //! \verbatim //! uint32_t ui32Ints; //! //! // //! // Get the pending USB DMA interrupts. //! // //! ui32Ints = USBDMAChannelIntStatus(USB0_BASE); //! \endverbatim //! //! \return The bit-mapped interrupts for the DMA channels. // //***************************************************************************** uint32_t USBDMAChannelIntStatus(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); return(HWREG(ui32Base + USB_O_DMAINTR)); } //***************************************************************************** // //! Enables integrated USB DMA for a specified channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies the USB DMA channel to enable. //! //! This function enables the USB DMA channel passed in the \e ui32Channel //! parameter. The \e ui32Channel value is a zero-based index of the USB DMA //! channel. //! //! \b Example: Enable USB DMA channel 2. //! //! \verbatim //! // //! // Enable USB DMA channel 2. //! // //! USBDMAChannelEnable(2); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelEnable(uint32_t ui32Base, uint32_t ui32Channel) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Enable the USB DMA channel. // HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) |= USB_DMACTL0_ENABLE; } //***************************************************************************** // //! Disables integrated USB DMA for a specified channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies the USB DMA channel to disable. //! //! This function disables the USB DMA channel passed in the \e ui32Channel //! parameter. The \e ui32Channel parameter is a zero-based index of the DMA //! channel. //! //! \b Example: Disable USB DMA channel 2. //! //! \verbatim //! // //! // Disable USB DMA channel 2. //! // //! USBDMAChannelDisable(2); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelDisable(uint32_t ui32Base, uint32_t ui32Channel) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Disable the USB DMA channel. // HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) &= ~USB_DMACTL0_ENABLE; } //***************************************************************************** // //! Assigns and configures an endpoint to a specified integrated USB DMA //! channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which DMA channel to access. //! \param ui32Endpoint is the endpoint to assign to the USB DMA channel. //! \param ui32Config is used to specify the configuration of the USB DMA //! channel. //! //! This function assigns an endpoint and configures the settings for a //! USB DMA channel. The \e ui32Endpoint parameter is one of the //! \b USB_EP_* values and the \e ui32Channel value is a zero-based index of //! the DMA channel to configure. The \e ui32Config parameter is a combination //! of the \b USB_DMA_CFG_* values using the following guidelines. //! //! Use one of the following to set the DMA burst mode: //! - \b USB_DMA_CFG_BURST_NONE disables bursting. //! - \b USB_DMA_CFG_BURST_4 sets the DMA burst size to 4 words. //! - \b USB_DMA_CFG_BURST_8 sets the DMA burst size to 8 words. //! - \b USB_DMA_CFG_BURST_16 sets the DMA burst size to 16 words. //! //! Use one of the following to set the DMA mode: //! - \b USB_DMA_CFG_MODE_0 is typically used when only a single packet is //! being sent via DMA and triggers one completion interrupt per packet. //! - \b USB_DMA_CFG_MODE_1 is typically used when multiple packets are being //! sent via DMA and triggers one completion interrupt per transfer. //! //! Use one of the following to set the direction of the transfer: //! - \b USB_DMA_CFG_DIR_RX selects a DMA transfer from the endpoint to a //! memory location. //! - \b USB_DMA_CFG_DIR_TX selects a DMA transfer to the endpoint from a //! memory location. //! //! The following two optional settings allow an application to immediately //! enable the DMA transfer and/or DMA interrupts when configuring the DMA //! channel: //! - \b USB_DMA_CFG_INT_EN enables interrupts for this channel immediately so //! that an added call to USBDMAChannelIntEnable() is not necessary. //! - \b USB_DMA_CFG_EN enables the DMA channel immediately so that an added //! call to USBDMAChannelEnable() is not necessary. //! //! \b Example: Assign channel 0 to endpoint 1 in DMA mode 0, 4 word burst, //! enable interrupts and immediately enable the transfer. //! //! \verbatim //! // //! // Assign channel 0 to endpoint 1 in DMA mode 0, 4 word bursts, //! // enable interrupts and immediately enable the transfer. //! // //! USBDMAChannelConfigSet(USB0_BASE, 0, USB_EP_1, //! (USB_DMA_CFG_BURST_4 | USB_DMA_CFG_MODE0 | //! USB_DMA_CFG_DIR_RX | USB_DMA_CFG_INT_EN | //! USB_DMA_CFG_EN)); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelConfigSet(uint32_t ui32Base, uint32_t ui32Channel, uint32_t ui32Endpoint, uint32_t ui32Config) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); ASSERT((ui32Endpoint & ~USB_EP_7) == 0); // // Reset this USB DMA channel. // HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) = 0; // // Set the configuration of the requested channel. // HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) = ui32Config | ui32Endpoint; } //***************************************************************************** // //! Returns the current status for an integrated USB DMA channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which DMA channel to query. //! //! This function returns the current status for the USB DMA channel specified //! by the \e ui32Channel parameter. The \e ui32Channel value is a zero-based //! index of the USB DMA channel to query. //! //! \b Example: Get the current USB DMA status for channel 2. //! //! \verbatim //! uint32_t ui32Status; //! //! // //! // Get the current USB DMA status for channel 2. //! // //! ui32Status = USBDMAChannelStatus(USB0_BASE, 2); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return Returns zero or \b USB_DMACTL0_ERR if there is a pending error //! condition on a DMA channel. // //***************************************************************************** uint32_t USBDMAChannelStatus(uint32_t ui32Base, uint32_t ui32Channel) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Return a non-zero value if there is a pending error condition. // return(HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) & USB_DMACTL0_ERR); } //***************************************************************************** // //! Clears the integrated USB DMA status for a specified channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which DMA channel to clear. //! \param ui32Status holds the status bits to clear. //! //! This function clears the USB DMA channel status for the channel specified //! by the \e ui32Channel parameter. The \e ui32Channel value is a zero-based //! index of the USB DMA channel to query. The \e ui32Status parameter //! specifies the status bits to clear and must be the valid values that are //! returned from a call to the USBDMAChannelStatus() function. //! //! \b Example: Clear the current USB DMA status for channel 2. //! //! \verbatim //! // //! // Clear the any pending USB DMA status for channel 2. //! // //! USBDMAChannelStatusClear(USB0_BASE, 2, USBDMAChannelStatus(USB0_BASE, 2)); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelStatusClear(uint32_t ui32Base, uint32_t ui32Channel, uint32_t ui32Status) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // The only status is the error bit. // ui32Status &= USB_DMACTL0_ERR; // // Clear the specified error condition. // HWREG(ui32Base + USB_O_DMACTL0 + (0x10 * ui32Channel)) &= ~ui32Status; } //***************************************************************************** // //! Sets the source or destination address for an integrated USB DMA transfer //! on a specified channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which DMA channel to configure. //! \param pvAddress specifies the source or destination address for the USB //! DMA transfer. //! //! This function sets the source or destination address for the USB DMA //! channel number specified in the \e ui32Channel parameter. The //! \e ui32Channel value is a zero-based index of the USB DMA channel. The //! \e pvAddress parameter is a source address if the transfer type for the DMA //! channel is transmit and a destination address if the transfer type is //! receive. //! //! \b Example: Set the transfer address for USB DMA channel 1. //! //! \verbatim //! void *pvBuffer; //! //! // //! // Set the address for USB DMA channel 1. //! // //! USBDMAChannelAddressSet(USB0_BASE, 1, pvBuffer); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelAddressSet(uint32_t ui32Base, uint32_t ui32Channel, void *pvAddress) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Set the DMA address. // HWREG(ui32Base + USB_O_DMAADDR0 + (0x10 * ui32Channel)) = (uint32_t)pvAddress; } //***************************************************************************** // //! Returns the source or destination address for the specified integrated USB //! DMA channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies the USB DMA channel. //! //! This function returns the DMA address for the channel number specified //! in the \e ui32Channel parameter. The \e ui32Channel value is a zero-based //! index of the DMA channel to query. This function must not be used on //! devices that return \b USB_CONTROLLER_VER_0 from the USBControllerVersion() //! function. //! //! \b Example: Get the transfer address for USB DMA channel 1. //! //! \verbatim //! void *pvBuffer; //! //! // //! // Retrieve the current DMA address for channel 1. //! // //! pvBuffer = USBDMAChannelAddressGet(USB0_BASE, 1); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return The current DMA address for a USB DMA channel. // //***************************************************************************** void * USBDMAChannelAddressGet(uint32_t ui32Base, uint32_t ui32Channel) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Return the current DMA address. // return((void *)HWREG(ui32Base + USB_O_DMAADDR0 + (0x10 * ui32Channel))); } //***************************************************************************** // //! Sets the transfer count for an integrated USB DMA channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which DMA channel to access. //! \param ui32Count specifies the number of bytes to transfer. //! //! This function sets the USB DMA transfer count in bytes for the channel //! number specified in the \e ui32Channel parameter. The \e ui32Channel //! value is a zero-based index of the DMA channel. //! //! \b Example: Set the transfer count to 512 bytes for USB DMA channel 1. //! //! \verbatim //! // //! // Set the transfer count to 512 bytes for USB DMA channel 1. //! // //! USBDMAChannelCountSet(USB0_BASE, 1, 512); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return None. // //***************************************************************************** void USBDMAChannelCountSet(uint32_t ui32Base, uint32_t ui32Channel, uint32_t ui32Count) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Set the USB DMA count for the channel. // HWREG(ui32Base + USB_O_DMACOUNT0 + (0x10 * ui32Channel)) = ui32Count; } //***************************************************************************** // //! Returns the transfer count for an integrated USB DMA channel. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Channel specifies which DMA channel to access. //! //! This function returns the USB DMA transfer count in bytes for the channel //! number specified in the \e ui32Channel parameter. The \e ui32Channel value //! is a zero-based index of the DMA channel to query. //! //! \b Example: Get the transfer count for USB DMA channel 1. //! //! \verbatim //! uint32_t ui32Count; //! //! // //! // Get the transfer count for USB DMA channel 1. //! // //! ui32Count = USBDMAChannelCountGet(USB0_BASE, 1); //! \endverbatim //! //! \note This feature is not available on all Tiva devices. Please //! check the data sheet to determine if the USB controller has a DMA //! controller or if it must use the uDMA controller for DMA transfers. //! //! \return The current count for a USB DMA channel. // //***************************************************************************** uint32_t USBDMAChannelCountGet(uint32_t ui32Base, uint32_t ui32Channel) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Channel < 8); // // Return the current DMA count. // return(HWREG(ui32Base + USB_O_DMACOUNT0 + (0x10 * ui32Channel))); } //***************************************************************************** // //! Returns the available number of integrated USB DMA channels. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the total number of DMA channels available when using //! the integrated USB DMA controller. This function returns 0 if the //! integrated controller is not present. //! //! \b Example: Get the number of integrated DMA channels. //! //! \verbatim //! uint32_t ui32Count; //! //! // //! // Get the number of integrated DMA channels. //! // //! ui32Count = USBDMANumChannels(USB0_BASE); //! \endverbatim //! //! \return The number of integrated USB DMA channels or zero if the //! integrated USB DMA controller is not present. // //***************************************************************************** uint32_t USBDMANumChannels(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); // // Return the number of DMA channels for the integrated DMA controller. // return(HWREG(ui32Base + USB_O_RAMINFO) >> USB_RAMINFO_DMACHAN_S); } //***************************************************************************** // // Close the Doxygen group. //! @} // //***************************************************************************** //***************************************************************************** // //! \addtogroup usb_ulpi //! @{ // //***************************************************************************** //***************************************************************************** // //! Configures the USB controller's ULPI function. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Config contains the configuration options. //! //! This function is used to configure the USB controller's ULPI function. //! The configuration options are set in the \e ui32Config parameter and are a //! logical OR of the following values: //! //! - \b USB_ULPI_EXTVBUS enables the external ULPI PHY as the source for VBUS //! signaling. //! - \b USB_ULPI_EXTVBUS_IND enables the external ULPI PHY to detect external //! VBUS over-current condition. //! //! \b Example: Enable ULPI PHY with full VBUS control. //! //! \verbatim //! // //! // Enable ULPI PHY with full VBUS control. //! // //! USBULPIConfig(USB0_BASE, USB_ULPI_EXTVBUS | USB_ULPI_EXTVBUS_IND); //! \endverbatim //! //! \note The USB ULPI feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBULPIConfig(uint32_t ui32Base, uint32_t ui32Config) { HWREGB(ui32Base + USB_O_ULPIVBUSCTL) = (uint8_t)ui32Config; } //***************************************************************************** // //! Enables the USB controller's ULPI function. //! //! \param ui32Base specifies the USB module base address. //! //! This function enables the USB controller's ULPI function and must be //! called before attempting to access an external ULPI-connected USB PHY. //! //! \b Example: Enable ULPI function. //! //! \verbatim //! // //! // Enable ULPI function. //! // //! USBULPIEnable(USB0_BASE); //! \endverbatim //! //! \note The USB ULPI feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBULPIEnable(uint32_t ui32Base) { HWREG(ui32Base + USB_O_PC) |= USB_PC_ULPIEN; } //***************************************************************************** // //! Disables the USB controller's ULPI function. //! //! \param ui32Base specifies the USB module base address. //! //! This function disables the USB controller's ULPI function. Accesses to //! the external ULPI-connected PHY cannot succeed after this function has been //! called. //! //! \b Example: Disable ULPI function. //! //! \verbatim //! // //! // Disable ULPI function. //! // //! USBULPIDisable(USB0_BASE); //! \endverbatim //! //! \note The USB ULPI feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBULPIDisable(uint32_t ui32Base) { HWREG(ui32Base + USB_O_PC) &= ~USB_PC_ULPIEN; } //***************************************************************************** // //! Reads a register from an external ULPI-connected USB PHY. //! //! \param ui32Base specifies the USB module base address. //! \param ui8Reg specifies the register address to read. //! //! This function reads the register address specified in the \e ui8Reg //! parameter using the ULPI function. This function is blocking and only //! returns when the read access completes. The function does not return if //! there is not a ULPI-connected USB PHY present. //! //! \b Example: Read a register from the ULPI PHY. //! //! \verbatim //! uint8_t ui8Value; //! //! // //! // Read a register from the ULPI PHY register at 0x10. //! // //! ui8Value = USBULPIRegRead(USB0_BASE, 0x10); //! \endverbatim //! //! \note The USB ULPI feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return The value of the requested ULPI register. // //***************************************************************************** uint8_t USBULPIRegRead(uint32_t ui32Base, uint8_t ui8Reg) { ASSERT(ui32Base == USB0_BASE); // // Set the register address and initiate a read access. // HWREGB(ui32Base + USB_O_ULPIREGADDR) = ui8Reg; HWREGB(ui32Base + USB_O_ULPIREGCTL) = USB_ULPIREGCTL_RDWR | USB_ULPIREGCTL_REGACC; // // Wait for the access to complete. // while((HWREGB(ui32Base + USB_O_ULPIREGCTL) & USB_ULPIREGCTL_REGCMPLT) == 0) { } // // Clear the register access complete flag. // HWREGB(ui32Base + USB_O_ULPIREGCTL) = 0; return(HWREGB(ui32Base + USB_O_ULPIREGDATA)); } //***************************************************************************** // //! Writes a value to a register on an external ULPI-connected USB PHY. //! //! \param ui32Base specifies the USB module base address. //! \param ui8Reg specifies the register address to write. //! \param ui8Data specifies the data to write. //! //! This function writes the register address specified in the \e ui8Reg //! parameter with the value specified in the \e ui8Data parameter using the //! ULPI function. This function is blocking and only returns when the //! write access completes. The function does not return if there is not a //! ULPI-connected USB PHY present. //! //! \b Example: Write a register from the external ULPI PHY. //! //! \verbatim //! // //! // Write the ULPI PHY register at 0x10 with 0x20. //! // //! USBULPIRegWrite(USB0_BASE, 0x10, 0x20); //! \endverbatim //! //! \note The USB ULPI feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBULPIRegWrite(uint32_t ui32Base, uint8_t ui8Reg, uint8_t ui8Data) { ASSERT(ui32Base == USB0_BASE); // // Set the register address and initiate a read access. // HWREGB(ui32Base + USB_O_ULPIREGADDR) = ui8Reg; HWREGB(ui32Base + USB_O_ULPIREGDATA) = ui8Data; HWREGB(ui32Base + USB_O_ULPIREGCTL) = USB_ULPIREGCTL_REGACC; // // Wait for the access to complete. // while((HWREGB(ui32Base + USB_O_ULPIREGCTL) & USB_ULPIREGCTL_REGCMPLT) == 0) { } // // Clear the register access complete flag. // HWREGB(ui32Base + USB_O_ULPIREGCTL) = 0; } //***************************************************************************** // // Close the Doxygen group. //! @} // //***************************************************************************** //***************************************************************************** // //! \addtogroup usb_lpm //! @{ // //***************************************************************************** //***************************************************************************** // //! Sends an LPM request to a device at a specified address and endpoint number. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Address is the target device address for the LPM request. //! \param ui32Endpoint is the target endpoint for the LPM request. //! //! This function sends an LPM request to a connected device in host mode. //! The \e ui32Address parameter specifies the device address and has a range //! of values from 1 to 127. The \e ui32Endpoint parameter specifies the //! endpoint on the device to which to send the LPM request and must be one of //! the \b USB_EP_* values. The function returns before the LPM request is //! sent, requiring the caller to poll the USBLPMIntStatus() function or wait //! for an interrupt to signal completion of the LPM transaction. This //! function must only be called after the USBHostLPMConfig() has configured //! the LPM transaction settings. //! //! \b Example: Send an LPM request to the device at address 1 on endpoint 0. //! //! \verbatim //! // //! // Send an LPM request to the device at address 1 on endpoint 0. //! // //! USBHostLPMSend(USB0_BASE, 1, USB_EP_0); //! \endverbatim //! //! \note This function must only be called in host mode. The USB LPM feature //! is not available on all Tiva devices. Please consult the data sheet for //! the Tiva device that you are using to determine if this feature is //! available. //! //! \return None. // //***************************************************************************** void USBHostLPMSend(uint32_t ui32Base, uint32_t ui32Address, uint32_t ui32Endpoint) { uint32_t ui32Reg; ASSERT(ui32Base == USB0_BASE); ASSERT(ui32Address < 127); // // Set the address and endpoint. // HWREGB(ui32Base + USB_O_LPMFADDR) = ui32Address; ui32Reg = HWREGH(ui32Base + USB_O_LPMATTR) & ~USB_LPMATTR_ENDPT_M; ui32Reg |= (USBEPToIndex(ui32Endpoint) << USB_LPMATTR_ENDPT_S); HWREGH(ui32Base + USB_O_LPMATTR) = ui32Reg; // // Send the LPM transaction. // HWREGB(ui32Base + USB_O_LPMCNTRL) |= USB_LPMCNTRL_TXLPM; } //***************************************************************************** // //! Sets the global configuration for all LPM requests. //! //! \param ui32Base specifies the USB module base address. //! \param ui32ResumeTime specifies the resume signaling duration in 75us //! increments. //! \param ui32Config specifies the combination of configuration options for //! LPM transactions. //! //! This function sets the global configuration options for LPM transactions //! and must be called at least once before ever calling USBHostLPMSend(). The //! \e ui32ResumeTime specifies the length of time that the host drives resume //! signaling on the bus in microseconds. The valid values //! for \e ui32ResumeTime are from 50us to 1175us in 75us increments. The //! remaining configuration is specified by the \e ui32Config parameter and //! includes the following options: //! //! - \b USB_HOST_LPM_RMTWAKE allows the device to signal a remote wake from //! the LPM state. //! - \b USB_HOST_LPM_L1 is the LPM mode to enter and must always be included //! in the configuration. //! //! \b Example: Set the LPM configuration to allow remote wake with a resume //! duration of 500us. //! //! \verbatim //! // //! // Set the LPM configuration to allow remote wake with a resume //! // duration of 500us. //! // //! USBHostLPMConfig(USB0_BASE, 500, USB_HOST_LPM_RMTWAKE | USB_HOST_LPM_L1); //! \endverbatim //! //! \note This function must only be called in host mode. The USB LPM feature //! is not available on all Tiva devices. Please consult the data sheet for //! the Tiva device that you are using to determine if this feature is //! available. //! //! \return None. // //***************************************************************************** void USBHostLPMConfig(uint32_t ui32Base, uint32_t ui32ResumeTime, uint32_t ui32Config) { ASSERT(ui32Base == USB0_BASE); ASSERT(ui32ResumeTime <= 1175); ASSERT(ui32ResumeTime >= 50); // // Set the Host Initiated Resume Duration, Remote wake and Suspend mode. // HWREGH(ui32Base + USB_O_LPMATTR) = ui32Config | ((ui32ResumeTime - 50) / 75) << USB_LPMATTR_HIRD_S; } //***************************************************************************** // //! Initiates resume signaling to wake a device from LPM suspend mode. //! //! \param ui32Base specifies the USB module base address. //! //! In host mode, this function initiates resume signaling to wake a device //! that has entered an LPM-triggered low power mode. This LPM-triggered low //! power mode is entered when the USBHostLPMSend() is called to put a specific //! device into a low power state. //! //! \b Example: Initiate resume signaling. //! //! \verbatim //! // //! // Initiate resume signaling. //! // //! USBHostLPMResume(USB0_BASE); //! \endverbatim //! //! \note This function must only be called in host mode. The USB LPM feature //! is not available on all Tiva devices. Please consult the data sheet for //! the Tiva device that you are using to determine if this feature is //! available. //! //! \return None. // //***************************************************************************** void USBHostLPMResume(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); // // Send Resume signaling. // HWREGB(ui32Base + USB_O_LPMCNTRL) |= USB_LPMCNTRL_RES; } //***************************************************************************** // //! Initiates remote wake signaling to request the device to leave LPM //! suspend mode. //! //! \param ui32Base specifies the USB module base address. //! //! This function initiates remote wake signaling to request that the host //! wake a device that has entered an LPM-triggered low power mode. //! //! \b Example: Initiate remote wake signaling. //! //! \verbatim //! // //! // Initiate remote wake signaling. //! // //! USBDevLPMRemoteWake(USB0_BASE); //! \endverbatim //! //! \note This function must only be called in device mode. The USB LPM feature //! is not available on all Tiva devices. Please consult the data sheet for //! the Tiva device that you are using to determine if this feature is //! available. //! //! \return None. // //***************************************************************************** void USBDevLPMRemoteWake(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); // // Send remote wake signaling. // HWREGB(ui32Base + USB_O_LPMCNTRL) |= USB_LPMCNTRL_RES; } //***************************************************************************** // //! Configures the USB device mode response to LPM requests. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Config is the combination of configuration options for LPM //! transactions in device mode. //! //! This function sets the global configuration options for LPM //! transactions in device mode and must be called before ever calling //! USBDevLPMEnable() to set the configuration for LPM transactions. The //! configuration options in device mode are specified in the \e ui32Config //! parameter and include one of the following: //! //! - \b USB_DEV_LPM_NONE disables the USB controller from responding to LPM //! transactions. //! - \b USB_DEV_LPM_EN enables the USB controller to respond to LPM //! and extended transactions. //! - \b USB_DEV_LPM_EXTONLY enables the USB controller to respond to //! extended transactions, but not LPM transactions. //! //! The \e ui32Config option can also optionally include the //! \b USB_DEV_LPM_NAK value to cause the USB controller to NAK all //! transactions other than an LPM transaction once the USB controller is in //! LPM suspend mode. If this value is not included in the \e ui32Config //! parameter, the USB controller does not respond in suspend mode. //! //! The USB controller does not enter LPM suspend mode until the application //! calls the USBDevLPMEnable() function. //! //! \b Example: Enable LPM transactions and NAK while in LPM suspend mode. //! //! \verbatim //! // //! // Enable LPM transactions and NAK while in LPM suspend mode. //! // //! USBDevLPMConfig(USB0_BASE, USB_DEV_LPM_NAK | USB_DEV_LPM_EN); //! \endverbatim //! //! \note This function must only be called in device mode. The USB LPM feature //! is not available on all Tiva devices. Please consult the data sheet for //! the Tiva device that you are using to determine if this feature is //! available. //! //! \return None. // //***************************************************************************** void USBDevLPMConfig(uint32_t ui32Base, uint32_t ui32Config) { ASSERT(ui32Base == USB0_BASE); // // Set the device LPM configuration. // HWREGB(ui32Base + USB_O_LPMCNTRL) = ui32Config; } //***************************************************************************** // //! Enables the USB controller to respond to LPM suspend requests. //! //! \param ui32Base specifies the USB module base address. //! //! This function is used to automatically respond to an LPM sleep request from //! the USB host controller. If there is no data pending in any transmit //! FIFOs, then the USB controller acknowledges the packet and enters the //! LPM L1 state and generates the \b USB_INTLPM_ACK interrupt. If the USB //! controller has pending transmit data in at least one FIFO, then the USB //! controller responds with NYET and signals the \b USB_INTLPM_INCOMPLETE or //! \b USB_INTLPM_NYET depending on if data is pending in receive or transmit //! FIFOs. A call to USBDevLPMEnable() is required after every //! LPM resume event to re-enable LPM mode. //! //! \b Example: Enable LPM suspend mode. //! //! \verbatim //! // //! // Enable LPM suspend mode. //! // //! USBDevLPMEnable(USB0_BASE); //! \endverbatim //! //! \note This function must only be called in device mode. The USB LPM feature //! is not available on all Tiva devices. Please consult the data sheet for //! the Tiva device that you are using to determine if this feature is //! available. //! //! \return None. // //***************************************************************************** void USBDevLPMEnable(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); // // Enable L1 mode on the next LPM transaction. // HWREGB(ui32Base + USB_O_LPMCNTRL) |= USB_LPMCNTRL_EN_LPMEXT | USB_LPMCNTRL_TXLPM; } //***************************************************************************** // //! Disables the USB controller from responding to LPM suspend requests. //! //! \param ui32Base specifies the USB module base address. //! //! This function disables the USB controller from responding to LPM //! transactions. When the device enters LPM L1 mode, the USB controller //! automatically disables responding to further LPM transactions. //! //! \note If LPM transactions were enabled before calling this function, then //! an LPM request can still occur before this function returns. As a result, //! the application must continue to handle LPM requests until this function //! returns. //! //! \b Example: Disable LPM suspend mode. //! //! \verbatim //! // //! // Disable LPM suspend mode. //! // //! USBDevLPMDisable(USB0_BASE); //! \endverbatim //! //! \note This function must only be called in device mode. The USB LPM feature //! is not available on all Tiva devices. Please consult the data sheet for //! the Tiva device that you are using to determine if this feature is //! available. //! //! \return None. // //***************************************************************************** void USBDevLPMDisable(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); // // Disable auto entering L1 mode on LPM transactions. // HWREGB(ui32Base + USB_O_LPMCNTRL) &= ~USB_LPMCNTRL_TXLPM; } //***************************************************************************** // //! Returns the current link state setting. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current link state setting for the USB //! controller. When the controller is operating as a host, this link //! state is sent with an LPM request. When the controller is acting //! as a device, this link state was received by the last LPM transaction //! whether it was acknowledged or stalled because the requested //! LPM mode is not supported. //! //! \b Example: Get the link state for the last LPM transaction. //! //! \verbatim //! uint32_t ui32LinkState; //! //! // //! // Get the endpoint number that received the LPM request. //! // //! ui32LinkState = USBLPMLinkStateGet(USB0_BASE); //! //! // //! // Check if this was a supported link state. //! // //! if(ui32LinkState == USB_HOST_LPM_L1) //! { //! // //! // Handle the supported L1 link state. //! // //! } //! else //! { //! // //! // Handle the unsupported link state. //! // //! } //! \endverbatim //! //! \note The USB LPM feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return The current LPM link state. // //***************************************************************************** uint32_t USBLPMLinkStateGet(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); return(HWREGH(ui32Base + USB_O_LPMATTR) & USB_LPMATTR_LS_M); } //***************************************************************************** // //! Returns the current LPM endpoint value. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current LPM endpoint value. The meaning of the //! value depends on the mode of operation of the USB controller. When in //! device mode, the value returned is the endpoint that received the last //! LPM transaction. When in host mode this is the endpoint that was last //! sent an LPM transaction, or the endpoint that is configured to be sent when //! the LPM transaction is triggered. The value returned is in the //! \b USB_EP_[0-7] value and a direct endpoint index. //! //! \b Example: Get the endpoint for the last LPM transaction. //! //! \verbatim //! uint32_t ui32Endpoint; //! //! // //! // Get the endpoint number that received the LPM request. //! // //! ui32LinkState = USBLPMEndpointGet(USB0_BASE); //! //! \endverbatim //! //! \note The USB LPM feature is not available on all Tiva devices. Please //! consult the data sheet for the Tiva device that you are using to determine //! if this feature is available. //! //! \return The last endpoint to receive an LPM request in device mode or the //! endpoint that the host sends an LPM request as one of the \b USB_EP_[0-7] //! values. // //***************************************************************************** uint32_t USBLPMEndpointGet(uint32_t ui32Base) { uint32_t ui32Endpoint; ASSERT(ui32Base == USB0_BASE); ui32Endpoint = (HWREGH(ui32Base + USB_O_LPMATTR) & USB_LPMATTR_ENDPT_M) >> USB_LPMATTR_ENDPT_S; return(IndexToUSBEP(ui32Endpoint)); } //***************************************************************************** // //! Returns if remote wake is currently enabled. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current state of the remote wake setting for host //! or device mode operation. If the controller is acting as a host this //! returns the current setting that is sent to devices when LPM requests are //! sent to a device. If the controller is in device mode, this function //! returns the state of the last LPM request sent from the host and indicates //! if the host enabled remote wakeup. //! //! \b Example: Issue remote wake if remote wake is enabled. //! //! \verbatim //! //! if(USBLPMRemoteWakeEnabled(USB0_BASE)) //! { //! USBDevLPMRemoteWake(USB0_BASE); //! } //! //! \endverbatim //! //! \note The USB LPM feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return The \b true if remote wake is enabled or \b false if it is not. // //***************************************************************************** bool USBLPMRemoteWakeEnabled(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); if(HWREGH(ui32Base + USB_O_LPMATTR) & USB_LPMATTR_RMTWAK) { return(true); } return(false); } //***************************************************************************** // //! Returns the current LPM interrupt status. //! //! \param ui32Base specifies the USB module base address. //! //! This function returns the current LPM interrupt status for the USB //! controller. //! //! The valid interrupt status bits when the USB controller is acting as a host //! are the following: //! //! - \b USB_INTLPM_ERROR a bus error occurred in the transmission of an LPM //! transaction. //! - \b USB_INTLPM_RESUME the USB controller has resumed from the LPM low //! power state. //! - \b USB_INTLPM_INCOMPLETE the LPM transaction failed because a timeout //! occurred or there were bit errors in the response for three attempts. //! - \b USB_INTLPM_ACK the device has acknowledged an LPM transaction. //! - \b USB_INTLPM_NYET the device has responded with a NYET to an LPM //! transaction. //! - \b USB_INTLPM_STALL the device has stalled an LPM transaction. //! //! The valid interrupt status bits when the USB controller is acting as a //! device are the following: //! //! - \b USB_INTLPM_ERROR an LPM transaction was received that has an //! unsupported link state field. The transaction was stalled, but the //! requested link state can still be read using the USBLPMLinkStateGet() //! function. //! - \b USB_INTLPM_RESUME the USB controller has resumed from the LPM low //! power state. //! - \b USB_INTLPM_INCOMPLETE the USB controller responded to an LPM //! transaction with a NYET because data was still in the transmit FIFOs. //! - \b USB_INTLPM_ACK the USB controller acknowledged an LPM transaction and //! is now in the LPM suspend mode. //! - \b USB_INTLPM_NYET the USB controller responded to an LPM transaction //! with a NYET because LPM transactions are not yet enabled by a call to //! USBDevLPMEnable(). //! - \b USB_INTLPM_STALL the USB controller has stalled an incoming LPM //! transaction. //! //! \note This call clears the source of all LPM status interrupts, so the //! caller must take care to save the value returned because a subsequent call //! to USBLPMIntStatus() does not return the previous value. //! //! \b Example: Get the current LPM interrupt status. //! //! \verbatim //! uint32_t ui32LPMIntStatus; //! //! // //! // Get the current LPM interrupt status. //! // //! ui32LPMIntStatus = USBLPMIntStatus(USB0_BASE); //! //! // //! // Check if an LPM transaction was acknowledged. //! // //! if(ui32LPMIntStatus & USB_INTLPM_ACK) //! { //! // //! // Handle entering LPM suspend mode. //! // //! ... //! } //! \endverbatim //! //! \note The USB LPM feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return The current LPM interrupt status. // //***************************************************************************** uint32_t USBLPMIntStatus(uint32_t ui32Base) { ASSERT(ui32Base == USB0_BASE); // // Return the current raw interrupt status. // return(HWREGB(ui32Base + USB_O_LPMRIS)); } //***************************************************************************** // //! Enables LPM interrupts. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Ints specifies which LPM interrupts to enable. //! //! This function enables a set of LPM interrupts so that they can trigger a //! USB interrupt. The \e ui32Ints parameter specifies which of the //! \b USB_INTLPM_* to enable. //! //! The valid interrupt status bits when the USB controller is acting as a host //! are the following: //! //! - \b USB_INTLPM_ERROR a bus error occurred in the transmission of an LPM //! transaction. //! - \b USB_INTLPM_RESUME the USB controller has resumed from LPM low power //! state. //! - \b USB_INTLPM_INCOMPLETE the LPM transaction failed because a timeout //! occurred or there were bit errors in the response for three attempts. //! - \b USB_INTLPM_ACK the device has acknowledged an LPM transaction. //! - \b USB_INTLPM_NYET the device has responded with a NYET to an LPM //! transaction. //! - \b USB_INTLPM_STALL the device has stalled an LPM transaction. //! //! The valid interrupt status bits when the USB controller is acting as a //! device are the following: //! //! - \b USB_INTLPM_ERROR an LPM transaction was received that has an //! unsupported link state field. The transaction was stalled, but the //! requested link state can still be read using the USBLPMLinkStateGet() //! function. //! - \b USB_INTLPM_RESUME the USB controller has resumed from the LPM low //! power state. //! - \b USB_INTLPM_INCOMPLETE the USB controller responded to an LPM //! transaction with a NYET because data was still in the transmit FIFOs. //! - \b USB_INTLPM_ACK the USB controller acknowledged an LPM transaction and //! is now in the LPM suspend mode. //! - \b USB_INTLPM_NYET the USB controller responded to an LPM transaction //! with a NYET because LPM transactions are not yet enabled by a call to //! USBDevLPMEnable(). //! - \b USB_INTLPM_STALL the USB controller has stalled an incoming LPM //! transaction. //! //! \b Example: Enable all LPM interrupt sources. //! //! \verbatim //! // //! // Enable all LPM interrupt sources. //! // //! USBLPMIntEnable(USB0_BASE, USB_INTLPM_ERROR | USB_INTLPM_RESUME | //! USB_INTLPM_INCOMPLETE | USB_INTLPM_ACK | //! USB_INTLPM_NYET | USB_INTLPM_STALL); //! \endverbatim //! //! \note The USB LPM feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBLPMIntEnable(uint32_t ui32Base, uint32_t ui32Ints) { ASSERT(ui32Base == USB0_BASE); // // Enable the requested interrupts. // HWREGB(ui32Base + USB_O_LPMIM) |= ui32Ints; } //***************************************************************************** // //! Disables LPM interrupts. //! //! \param ui32Base specifies the USB module base address. //! \param ui32Ints specifies which LPM interrupts to disable. //! //! This function disables the LPM interrupts specified in the \e ui32Ints //! parameter, preventing them from triggering a USB interrupt. //! //! The valid interrupt status bits when the USB controller is acting as a host //! are the following: //! //! - \b USB_INTLPM_ERROR a bus error occurred in the transmission of an LPM //! transaction. //! - \b USB_INTLPM_RESUME the USB controller has resumed from LPM low power //! state. //! - \b USB_INTLPM_INCOMPLETE the LPM transaction failed because a timeout //! occurred or there were bit errors in the response for three attempts. //! - \b USB_INTLPM_ACK the device has acknowledged an LPM transaction. //! - \b USB_INTLPM_NYET the device has responded with a NYET to an LPM //! transaction. //! - \b USB_INTLPM_STALL the device has stalled an LPM transaction. //! //! The valid interrupt status bits when the USB controller is acting as a //! device are the following: //! //! - \b USB_INTLPM_ERROR an LPM transaction was received that has an //! unsupported link state field. The transaction was stalled, but the //! requested link state can still be read using the USBLPMLinkStateGet() //! function. //! - \b USB_INTLPM_RESUME the USB controller has resumed from the LPM low //! power state. //! - \b USB_INTLPM_INCOMPLETE the USB controller responded to an LPM //! transaction with a NYET because data was still in the transmit FIFOs. //! - \b USB_INTLPM_ACK the USB controller acknowledged an LPM transaction and //! is now in the LPM suspend mode. //! - \b USB_INTLPM_NYET the USB controller responded to an LPM transaction //! with a NYET because LPM transactions are not yet enabled by a call to //! USBDevLPMEnable(). //! - \b USB_INTLPM_STALL the USB controller has stalled an incoming LPM //! transaction. //! //! \b Example: Disable all LPM interrupt sources. //! //! \verbatim //! // //! // Disable all LPM interrupt sources. //! // //! USBLPMIntDisable(USB0_BASE, USB_INTLPM_ERROR | USB_INTLPM_RESUME | //! USB_INTLPM_INCOMPLETE | USB_INTLPM_ACK | //! USB_INTLPM_NYET | USB_INTLPM_STALL); //! \endverbatim //! //! \note The USB LPM feature is not available on all Tiva devices. //! Please consult the data sheet for the Tiva device that you //! are using to determine if this feature is available. //! //! \return None. // //***************************************************************************** void USBLPMIntDisable(uint32_t ui32Base, uint32_t ui32Ints) { ASSERT(ui32Base == USB0_BASE); // // Disable the requested interrupts. // HWREGB(ui32Base + USB_O_LPMIM) &= ~ui32Ints; } //***************************************************************************** // // Close the Doxygen group. //! @} // //*****************************************************************************