440 lines
16 KiB
C
440 lines
16 KiB
C
/***************************************************************************//**
|
|
* @file
|
|
* @brief General Purpose IO (GPIO) peripheral API for EFM32.
|
|
* @author Energy Micro AS
|
|
* @version 2.0.0
|
|
*******************************************************************************
|
|
* @section License
|
|
* <b>(C) Copyright 2010 Energy Micro AS, http://www.energymicro.com</b>
|
|
*******************************************************************************
|
|
*
|
|
* This source code is the property of Energy Micro AS. The source and compiled
|
|
* code may only be used on Energy Micro "EFM32" microcontrollers.
|
|
*
|
|
* This copyright notice may not be removed from the source code nor changed.
|
|
*
|
|
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
|
|
* obligation to support this Software. Energy Micro AS is providing the
|
|
* Software "AS IS", with no express or implied warranties of any kind,
|
|
* including, but not limited to, any implied warranties of merchantability
|
|
* or fitness for any particular purpose or warranties against infringement
|
|
* of any proprietary rights of a third party.
|
|
*
|
|
* Energy Micro AS will not be liable for any consequential, incidental, or
|
|
* special damages, or any other relief, or for any claim by any third party,
|
|
* arising from your use of this Software.
|
|
*
|
|
******************************************************************************/
|
|
#ifndef __EFM32_GPIO_H
|
|
#define __EFM32_GPIO_H
|
|
|
|
#include <stdbool.h>
|
|
#include "efm32.h"
|
|
#include "efm32_bitband.h"
|
|
#include "efm32_assert.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/***************************************************************************//**
|
|
* @addtogroup EFM32_Library
|
|
* @{
|
|
******************************************************************************/
|
|
|
|
/***************************************************************************//**
|
|
* @addtogroup GPIO
|
|
* @{
|
|
******************************************************************************/
|
|
|
|
/*******************************************************************************
|
|
******************************** ENUMS ************************************
|
|
******************************************************************************/
|
|
|
|
/** GPIO ports identificator. */
|
|
typedef enum
|
|
{
|
|
gpioPortA = 0, /**< Port A */
|
|
gpioPortB = 1, /**< Port B */
|
|
gpioPortC = 2, /**< Port C */
|
|
gpioPortD = 3, /**< Port D */
|
|
gpioPortE = 4, /**< Port E */
|
|
gpioPortF = 5 /**< Port F */
|
|
} GPIO_Port_TypeDef;
|
|
|
|
/** GPIO drive mode. */
|
|
typedef enum
|
|
{
|
|
/** Default 6mA */
|
|
gpioDriveModeStandard = GPIO_P_CTRL_DRIVEMODE_STANDARD,
|
|
/** 0.5 mA */
|
|
gpioDriveModeLowest = GPIO_P_CTRL_DRIVEMODE_LOWEST,
|
|
/** 20 mA */
|
|
gpioDriveModeHigh = GPIO_P_CTRL_DRIVEMODE_HIGH,
|
|
/** 2 mA */
|
|
gpioDriveModeLow = GPIO_P_CTRL_DRIVEMODE_LOW
|
|
} GPIO_DriveMode_TypeDef;
|
|
|
|
/** Pin mode. For more details on each mode, please refer to the EFM32
|
|
* reference manual. */
|
|
typedef enum
|
|
{
|
|
/** Input disabled. Pullup if DOUT is set. */
|
|
gpioModeDisabled = _GPIO_P_MODEL_MODE0_DISABLED,
|
|
/** Input enabled. Filter if DOUT is set */
|
|
gpioModeInput = _GPIO_P_MODEL_MODE0_INPUT,
|
|
/** Input enabled. DOUT determines pull direction */
|
|
gpioModeInputPull = _GPIO_P_MODEL_MODE0_INPUTPULL,
|
|
/** Input enabled with filter. DOUT determines pull direction */
|
|
gpioModeInputPullFilter = _GPIO_P_MODEL_MODE0_INPUTPULLFILTER,
|
|
/** Push-pull output */
|
|
gpioModePushPull = _GPIO_P_MODEL_MODE0_PUSHPULL,
|
|
/** Push-pull output with drive-strength set by DRIVEMODE */
|
|
gpioModePushPullDrive = _GPIO_P_MODEL_MODE0_PUSHPULLDRIVE,
|
|
/** Wired-or output */
|
|
gpioModeWiredOr = _GPIO_P_MODEL_MODE0_WIREDOR,
|
|
/** Wired-or output with pull-down */
|
|
gpioModeWiredOrPullDown = _GPIO_P_MODEL_MODE0_WIREDORPULLDOWN,
|
|
/** Open-drain output */
|
|
gpioModeWiredAnd = _GPIO_P_MODEL_MODE0_WIREDAND,
|
|
/** Open-drain output with filter */
|
|
gpioModeWiredAndFilter = _GPIO_P_MODEL_MODE0_WIREDANDFILTER,
|
|
/** Open-drain output with pullup */
|
|
gpioModeWiredAndPullUp = _GPIO_P_MODEL_MODE0_WIREDANDPULLUP,
|
|
/** Open-drain output with filter and pullup */
|
|
gpioModeWiredAndPullUpFilter = _GPIO_P_MODEL_MODE0_WIREDANDPULLUPFILTER,
|
|
/** Open-drain output with drive-strength set by DRIVEMODE */
|
|
gpioModeWiredAndDrive = _GPIO_P_MODEL_MODE0_WIREDANDDRIVE,
|
|
/** Open-drain output with filter and drive-strength set by DRIVEMODE */
|
|
gpioModeWiredAndDriveFilter = _GPIO_P_MODEL_MODE0_WIREDANDDRIVEFILTER,
|
|
/** Open-drain output with pullup and drive-strength set by DRIVEMODE */
|
|
gpioModeWiredAndDrivePullUp = _GPIO_P_MODEL_MODE0_WIREDANDDRIVEPULLUP,
|
|
/** Open-drain output with filter, pullup and drive-strength set by DRIVEMODE */
|
|
gpioModeWiredAndDrivePullUpFilter = _GPIO_P_MODEL_MODE0_WIREDANDDRIVEPULLUPFILTER
|
|
} GPIO_Mode_TypeDef;
|
|
|
|
/*******************************************************************************
|
|
***************************** PROTOTYPES **********************************
|
|
******************************************************************************/
|
|
|
|
void GPIO_DbgLocationSet(unsigned int location);
|
|
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_TINY_FAMILY)
|
|
static __INLINE void GPIO_EM4SetPinRetention(bool enable);
|
|
#endif
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Enable/disable serial wire clock pin.
|
|
*
|
|
* @note
|
|
* Disabling SWDClk will disable the debug interface, which may result in
|
|
* a lockout if done early in startup (before debugger is able to halt core).
|
|
*
|
|
* @param[in] enable
|
|
* @li false - disable serial wire clock.
|
|
* @li true - enable serial wire clock (default after reset).
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_DbgSWDClkEnable(bool enable)
|
|
{
|
|
BITBAND_Peripheral(&(GPIO->ROUTE), _GPIO_ROUTE_SWCLKPEN_SHIFT, (unsigned int)enable);
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Enable/disable serial wire data pin.
|
|
*
|
|
* @note
|
|
* Disabling SWDClk will disable the debug interface, which may result in
|
|
* a lockout if done early in startup (before debugger is able to halt core).
|
|
*
|
|
* @param[in] enable
|
|
* @li false - disable serial wire data pin.
|
|
* @li true - enable serial wire data pin (default after reset).
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_DbgSWDIOEnable(bool enable)
|
|
{
|
|
BITBAND_Peripheral(&(GPIO->ROUTE), _GPIO_ROUTE_SWDIOPEN_SHIFT, (unsigned int)enable);
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Enable/Disable serial wire output pin.
|
|
*
|
|
* @note
|
|
* Enabling this pin is not sufficient to fully enable serial wire output
|
|
* which is also dependent on issues outside the GPIO module. Please refer to
|
|
* DBG_SWOEnable().
|
|
*
|
|
* @param[in] enable
|
|
* @li false - disable serial wire viewer pin (default after reset).
|
|
* @li true - enable serial wire viewer pin.
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_DbgSWOEnable(bool enable)
|
|
{
|
|
BITBAND_Peripheral(&(GPIO->ROUTE), _GPIO_ROUTE_SWOPEN_SHIFT, (unsigned int)enable);
|
|
}
|
|
|
|
|
|
void GPIO_DriveModeSet(GPIO_Port_TypeDef port, GPIO_DriveMode_TypeDef mode);
|
|
|
|
|
|
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_TINY_FAMILY)
|
|
/**************************************************************************//**
|
|
* @brief
|
|
* Disable GPIO pin wake-up from EM4.
|
|
*
|
|
* @param[in] pinmask
|
|
* Bitmask containing the bitwise logic OR of which GPIO pin(s) to disable.
|
|
* Refer to Reference Manuals for pinmask to GPIO port/pin mapping.
|
|
*****************************************************************************/
|
|
static __INLINE void GPIO_EM4DisablePinWakeup(uint32_t pinmask)
|
|
{
|
|
EFM_ASSERT((pinmask & ~_GPIO_EM4WUEN_MASK) == 0);
|
|
|
|
GPIO->EM4WUEN &= ~pinmask;
|
|
}
|
|
|
|
|
|
/**************************************************************************//**
|
|
* @brief
|
|
* Enable GPIO pin wake-up from EM4. When the function exits,
|
|
* EM4 mode can be safely entered.
|
|
*
|
|
* @note
|
|
* It is assumed that the GPIO pin modes are set correctly.
|
|
* Valid modes are @ref gpioModeInput and @ref gpioModeInputPull.
|
|
*
|
|
* @param[in] pinmask
|
|
* Bitmask containing the bitwise logic OR of which GPIO pin(s) to enable.
|
|
* Refer to Reference Manuals for pinmask to GPIO port/pin mapping.
|
|
* @param[in] polaritymask
|
|
* Bitmask containing the bitwise logic OR of GPIO pin(s) wake-up polarity.
|
|
* Refer to Reference Manuals for pinmask to GPIO port/pin mapping.
|
|
*****************************************************************************/
|
|
static __INLINE void GPIO_EM4EnablePinWakeup(uint32_t pinmask,
|
|
uint32_t polaritymask)
|
|
{
|
|
EFM_ASSERT((pinmask & ~_GPIO_EM4WUEN_MASK) == 0);
|
|
EFM_ASSERT((polaritymask & ~_GPIO_EM4WUPOL_MASK) == 0);
|
|
|
|
GPIO->EM4WUPOL &= ~pinmask; /* Set wakeup polarity */
|
|
GPIO->EM4WUPOL |= pinmask & polaritymask;
|
|
GPIO->EM4WUEN |= pinmask; /* Enable wakeup */
|
|
|
|
GPIO_EM4SetPinRetention(true); /* Enable pin retention */
|
|
|
|
GPIO->CMD = GPIO_CMD_EM4WUCLR; /* Clear wake-up logic */
|
|
}
|
|
|
|
/**************************************************************************//**
|
|
* @brief
|
|
* Check which GPIO pin(s) that caused a wake-up from EM4.
|
|
*
|
|
* @return
|
|
* Bitmask containing the bitwise logic OR of which GPIO pin(s) caused the
|
|
* wake-up. Refer to Reference Manuals for pinmask to GPIO port/pin mapping.
|
|
*****************************************************************************/
|
|
static __INLINE uint32_t GPIO_EM4GetPinWakeupCause(void)
|
|
{
|
|
return GPIO->EM4WUCAUSE & _GPIO_EM4WUCAUSE_MASK;
|
|
}
|
|
|
|
|
|
/**************************************************************************//**
|
|
* @brief
|
|
* Enable GPIO pin retention of output enable, output value, pull enable and
|
|
* pull direction in EM4.
|
|
*
|
|
* @param[in] enable
|
|
* @li true - enable EM4 pin retention.
|
|
* @li false - disable EM4 pin retention.
|
|
*****************************************************************************/
|
|
static __INLINE void GPIO_EM4SetPinRetention(bool enable)
|
|
{
|
|
if (enable)
|
|
{
|
|
GPIO->CTRL |= GPIO_CTRL_EM4RET;
|
|
}
|
|
else
|
|
{
|
|
GPIO->CTRL &= ~GPIO_CTRL_EM4RET;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Enable/disable input sensing.
|
|
*
|
|
* @details
|
|
* Disabling input sensing if not used, can save some energy consumption.
|
|
*
|
|
* @param[in] val
|
|
* Bitwise logic OR of one or more of:
|
|
* @li GPIO_INSENSE_INTSENSE - interrupt input sensing.
|
|
* @li GPIO_INSENSE_PRSSENSE - peripheral reflex system input sensing.
|
|
*
|
|
* @param[in] mask
|
|
* Mask containing bitwise logic OR of bits similar as for @p val used to indicate
|
|
* which input sense options to disable/enable.
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_InputSenseSet(uint32_t val, uint32_t mask)
|
|
{
|
|
GPIO->INSENSE = (GPIO->INSENSE & ~mask) | (val & mask);
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Clear one or more pending GPIO interrupts.
|
|
*
|
|
* @param[in] flags
|
|
* Bitwise logic OR of GPIO interrupt sources to clear.
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_IntClear(uint32_t flags)
|
|
{
|
|
GPIO->IFC = flags;
|
|
}
|
|
|
|
|
|
void GPIO_IntConfig(GPIO_Port_TypeDef port,
|
|
unsigned int pin,
|
|
bool risingEdge,
|
|
bool fallingEdge,
|
|
bool enable);
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Disable one or more GPIO interrupts.
|
|
*
|
|
* @param[in] flags
|
|
* GPIO interrupt sources to disable.
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_IntDisable(uint32_t flags)
|
|
{
|
|
GPIO->IEN &= ~flags;
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Enable one or more GPIO interrupts.
|
|
*
|
|
* @note
|
|
* Depending on the use, a pending interrupt may already be set prior to
|
|
* enabling the interrupt. Consider using GPIO_IntClear() prior to enabling
|
|
* if such a pending interrupt should be ignored.
|
|
*
|
|
* @param[in] flags
|
|
* GPIO interrupt sources to enable.
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_IntEnable(uint32_t flags)
|
|
{
|
|
GPIO->IEN |= flags;
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Get pending GPIO interrupts.
|
|
*
|
|
* @return
|
|
* GPIO interrupt sources pending.
|
|
******************************************************************************/
|
|
static __INLINE uint32_t GPIO_IntGet(void)
|
|
{
|
|
return(GPIO->IF);
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Get enabled and pending GPIO interrupt flags.
|
|
* Useful for handling more interrupt sources in the same interrupt handler.
|
|
*
|
|
* @note
|
|
* Interrupt flags are not cleared by the use of this function.
|
|
*
|
|
* @return
|
|
* Pending and enabled GPIO interrupt sources.
|
|
* The return value is the bitwise AND combination of
|
|
* - the OR combination of enabled interrupt sources in GPIO_IEN register
|
|
* and
|
|
* - the OR combination of valid interrupt flags in GPIO_IF register.
|
|
******************************************************************************/
|
|
static __INLINE uint32_t GPIO_IntGetEnabled(void)
|
|
{
|
|
uint32_t tmp;
|
|
|
|
/* Store GPIO->IEN in temporary variable in order to define explicit order
|
|
* of volatile accesses. */
|
|
tmp = GPIO->IEN;
|
|
|
|
/* Bitwise AND of pending and enabled interrupts */
|
|
return GPIO->IF & tmp;
|
|
}
|
|
|
|
|
|
/**************************************************************************//**
|
|
* @brief
|
|
* Set one or more pending GPIO interrupts from SW.
|
|
*
|
|
* @param[in] flags
|
|
* GPIO interrupt sources to set to pending.
|
|
*****************************************************************************/
|
|
static __INLINE void GPIO_IntSet(uint32_t flags)
|
|
{
|
|
GPIO->IFS = flags;
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Locks the GPIO configuration.
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_Lock(void)
|
|
{
|
|
GPIO->LOCK = GPIO_LOCK_LOCKKEY_LOCK;
|
|
}
|
|
|
|
|
|
unsigned int GPIO_PinInGet(GPIO_Port_TypeDef port, unsigned int pin);
|
|
void GPIO_PinModeSet(GPIO_Port_TypeDef port,
|
|
unsigned int pin,
|
|
GPIO_Mode_TypeDef mode,
|
|
unsigned int out);
|
|
void GPIO_PinOutClear(GPIO_Port_TypeDef port, unsigned int pin);
|
|
unsigned int GPIO_PinOutGet(GPIO_Port_TypeDef port, unsigned int pin);
|
|
void GPIO_PinOutSet(GPIO_Port_TypeDef port, unsigned int pin);
|
|
void GPIO_PinOutToggle(GPIO_Port_TypeDef port, unsigned int pin);
|
|
|
|
uint32_t GPIO_PortInGet(GPIO_Port_TypeDef port);
|
|
void GPIO_PortOutClear(GPIO_Port_TypeDef port, uint32_t pins);
|
|
uint32_t GPIO_PortOutGet(GPIO_Port_TypeDef port);
|
|
void GPIO_PortOutSet(GPIO_Port_TypeDef port, uint32_t pins);
|
|
void GPIO_PortOutSetVal(GPIO_Port_TypeDef port, uint32_t val, uint32_t mask);
|
|
void GPIO_PortOutToggle(GPIO_Port_TypeDef port, uint32_t pins);
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Unlocks the GPIO configuration.
|
|
******************************************************************************/
|
|
static __INLINE void GPIO_Unlock(void)
|
|
{
|
|
GPIO->LOCK = GPIO_LOCK_LOCKKEY_UNLOCK;
|
|
}
|
|
|
|
|
|
/** @} (end addtogroup GPIO) */
|
|
/** @} (end addtogroup EFM32_Library) */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __EFM32_GPIO_H */
|