1601 lines
55 KiB
C
1601 lines
55 KiB
C
//*****************************************************************************
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//
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// gpio.c - API for GPIO ports
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//
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// Copyright (c) 2005-2010 Texas Instruments Incorporated. All rights reserved.
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// Software License Agreement
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//
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// Texas Instruments (TI) is supplying this software for use solely and
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// exclusively on TI's microcontroller products. The software is owned by
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// TI and/or its suppliers, and is protected under applicable copyright
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// laws. You may not combine this software with "viral" open-source
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// software in order to form a larger program.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
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// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
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// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
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// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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// DAMAGES, FOR ANY REASON WHATSOEVER.
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//
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// This is part of revision 6459 of the Stellaris Peripheral Driver Library.
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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//! \addtogroup gpio_api
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//! @{
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//
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//*****************************************************************************
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#include "inc/hw_gpio.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_memmap.h"
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#include "inc/hw_sysctl.h"
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#include "inc/hw_types.h"
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#include "driverlib/debug.h"
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#include "driverlib/gpio.h"
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#include "driverlib/interrupt.h"
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//*****************************************************************************
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//
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// The base addresses of all the GPIO modules. Both the APB and AHB apertures
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// are provided.
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//
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//*****************************************************************************
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static const unsigned long g_pulGPIOBaseAddrs[] =
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{
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GPIO_PORTA_BASE, GPIO_PORTA_AHB_BASE,
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GPIO_PORTB_BASE, GPIO_PORTB_AHB_BASE,
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GPIO_PORTC_BASE, GPIO_PORTC_AHB_BASE,
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GPIO_PORTD_BASE, GPIO_PORTD_AHB_BASE,
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GPIO_PORTE_BASE, GPIO_PORTE_AHB_BASE,
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GPIO_PORTF_BASE, GPIO_PORTF_AHB_BASE,
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GPIO_PORTG_BASE, GPIO_PORTG_AHB_BASE,
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GPIO_PORTH_BASE, GPIO_PORTH_AHB_BASE,
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GPIO_PORTJ_BASE, GPIO_PORTJ_AHB_BASE,
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};
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//*****************************************************************************
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//
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//! \internal
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//! Checks a GPIO base address.
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//!
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//! \param ulPort is the base address of the GPIO port.
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//!
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//! This function determines if a GPIO port base address is valid.
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//!
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//! \return Returns \b true if the base address is valid and \b false
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//! otherwise.
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//
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//*****************************************************************************
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#ifdef DEBUG
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static tBoolean
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GPIOBaseValid(unsigned long ulPort)
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{
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return((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTA_AHB_BASE) ||
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(ulPort == GPIO_PORTB_BASE) || (ulPort == GPIO_PORTB_AHB_BASE) ||
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(ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTC_AHB_BASE) ||
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(ulPort == GPIO_PORTD_BASE) || (ulPort == GPIO_PORTD_AHB_BASE) ||
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(ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTE_AHB_BASE) ||
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(ulPort == GPIO_PORTF_BASE) || (ulPort == GPIO_PORTF_AHB_BASE) ||
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(ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTG_AHB_BASE) ||
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(ulPort == GPIO_PORTH_BASE) || (ulPort == GPIO_PORTH_AHB_BASE) ||
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(ulPort == GPIO_PORTJ_BASE) || (ulPort == GPIO_PORTJ_AHB_BASE));
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}
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#endif
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//*****************************************************************************
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//
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//! \internal
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//! Gets the GPIO interrupt number.
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//!
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//! \param ulPort is the base address of the GPIO port.
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//!
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//! Given a GPIO base address, returns the corresponding interrupt number.
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//!
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//! \return Returns a GPIO interrupt number, or -1 if \e ulPort is invalid.
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//
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//*****************************************************************************
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static long
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GPIOGetIntNumber(unsigned long ulPort)
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{
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unsigned int ulInt;
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//
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// Determine the GPIO interrupt number for the given module.
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//
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switch(ulPort)
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{
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case GPIO_PORTA_BASE:
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case GPIO_PORTA_AHB_BASE:
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{
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ulInt = INT_GPIOA;
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break;
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}
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case GPIO_PORTB_BASE:
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case GPIO_PORTB_AHB_BASE:
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{
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ulInt = INT_GPIOB;
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break;
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}
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case GPIO_PORTC_BASE:
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case GPIO_PORTC_AHB_BASE:
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{
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ulInt = INT_GPIOC;
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break;
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}
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case GPIO_PORTD_BASE:
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case GPIO_PORTD_AHB_BASE:
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{
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ulInt = INT_GPIOD;
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break;
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}
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case GPIO_PORTE_BASE:
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case GPIO_PORTE_AHB_BASE:
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{
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ulInt = INT_GPIOE;
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break;
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}
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case GPIO_PORTF_BASE:
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case GPIO_PORTF_AHB_BASE:
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{
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ulInt = INT_GPIOF;
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break;
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}
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case GPIO_PORTG_BASE:
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case GPIO_PORTG_AHB_BASE:
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{
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ulInt = INT_GPIOG;
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break;
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}
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case GPIO_PORTH_BASE:
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case GPIO_PORTH_AHB_BASE:
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{
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ulInt = INT_GPIOH;
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break;
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}
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case GPIO_PORTJ_BASE:
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case GPIO_PORTJ_AHB_BASE:
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{
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ulInt = INT_GPIOJ;
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break;
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}
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default:
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{
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return(-1);
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}
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}
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//
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// Return GPIO interrupt number.
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//
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return(ulInt);
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}
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//*****************************************************************************
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//
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//! Sets the direction and mode of the specified pin(s).
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//!
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//! \param ulPort is the base address of the GPIO port
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//! \param ucPins is the bit-packed representation of the pin(s).
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//! \param ulPinIO is the pin direction and/or mode.
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//!
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//! This function will set the specified pin(s) on the selected GPIO port
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//! as either an input or output under software control, or it will set the
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//! pin to be under hardware control.
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//!
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//! The parameter \e ulPinIO is an enumerated data type that can be one of
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//! the following values:
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//!
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//! - \b GPIO_DIR_MODE_IN
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//! - \b GPIO_DIR_MODE_OUT
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//! - \b GPIO_DIR_MODE_HW
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//!
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//! where \b GPIO_DIR_MODE_IN specifies that the pin will be programmed as
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//! a software controlled input, \b GPIO_DIR_MODE_OUT specifies that the pin
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//! will be programmed as a software controlled output, and
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//! \b GPIO_DIR_MODE_HW specifies that the pin will be placed under
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//! hardware control.
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//!
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//! The pin(s) are specified using a bit-packed byte, where each bit that is
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//! set identifies the pin to be accessed, and where bit 0 of the byte
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//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
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//!
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//! \note GPIOPadConfigSet() must also be used to configure the corresponding
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//! pad(s) in order for them to propagate the signal to/from the GPIO.
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//!
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//! \return None.
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//
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//*****************************************************************************
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void
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GPIODirModeSet(unsigned long ulPort, unsigned char ucPins,
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unsigned long ulPinIO)
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{
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//
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// Check the arguments.
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//
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ASSERT(GPIOBaseValid(ulPort));
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ASSERT((ulPinIO == GPIO_DIR_MODE_IN) || (ulPinIO == GPIO_DIR_MODE_OUT) ||
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(ulPinIO == GPIO_DIR_MODE_HW));
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//
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// Set the pin direction and mode.
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//
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HWREG(ulPort + GPIO_O_DIR) = ((ulPinIO & 1) ?
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(HWREG(ulPort + GPIO_O_DIR) | ucPins) :
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(HWREG(ulPort + GPIO_O_DIR) & ~(ucPins)));
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HWREG(ulPort + GPIO_O_AFSEL) = ((ulPinIO & 2) ?
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(HWREG(ulPort + GPIO_O_AFSEL) | ucPins) :
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(HWREG(ulPort + GPIO_O_AFSEL) &
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~(ucPins)));
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}
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//*****************************************************************************
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//
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//! Gets the direction and mode of a pin.
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//!
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//! \param ulPort is the base address of the GPIO port.
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//! \param ucPin is the pin number.
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//!
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//! This function gets the direction and control mode for a specified pin on
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//! the selected GPIO port. The pin can be configured as either an input or
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//! output under software control, or it can be under hardware control. The
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//! type of control and direction are returned as an enumerated data type.
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//!
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//! \return Returns one of the enumerated data types described for
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//! GPIODirModeSet().
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//
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//*****************************************************************************
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unsigned long
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GPIODirModeGet(unsigned long ulPort, unsigned char ucPin)
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{
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unsigned long ulDir, ulAFSEL;
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//
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// Check the arguments.
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//
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ASSERT(GPIOBaseValid(ulPort));
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ASSERT(ucPin < 8);
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//
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// Convert from a pin number to a bit position.
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//
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ucPin = 1 << ucPin;
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//
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// Return the pin direction and mode.
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//
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ulDir = HWREG(ulPort + GPIO_O_DIR);
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ulAFSEL = HWREG(ulPort + GPIO_O_AFSEL);
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return(((ulDir & ucPin) ? 1 : 0) | ((ulAFSEL & ucPin) ? 2 : 0));
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}
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//*****************************************************************************
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//
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//! Sets the interrupt type for the specified pin(s).
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//!
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//! \param ulPort is the base address of the GPIO port.
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//! \param ucPins is the bit-packed representation of the pin(s).
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//! \param ulIntType specifies the type of interrupt trigger mechanism.
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//!
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//! This function sets up the various interrupt trigger mechanisms for the
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//! specified pin(s) on the selected GPIO port.
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//!
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//! The parameter \e ulIntType is an enumerated data type that can be one of
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//! the following values:
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//!
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//! - \b GPIO_FALLING_EDGE
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//! - \b GPIO_RISING_EDGE
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//! - \b GPIO_BOTH_EDGES
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//! - \b GPIO_LOW_LEVEL
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//! - \b GPIO_HIGH_LEVEL
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//!
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//! where the different values describe the interrupt detection mechanism
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//! (edge or level) and the particular triggering event (falling, rising,
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//! or both edges for edge detect, low or high for level detect).
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//!
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//! The pin(s) are specified using a bit-packed byte, where each bit that is
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//! set identifies the pin to be accessed, and where bit 0 of the byte
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//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
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//!
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//! \note In order to avoid any spurious interrupts, the user must
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//! ensure that the GPIO inputs remain stable for the duration of
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//! this function.
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//!
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//! \return None.
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//
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//*****************************************************************************
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void
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GPIOIntTypeSet(unsigned long ulPort, unsigned char ucPins,
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unsigned long ulIntType)
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{
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//
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// Check the arguments.
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//
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ASSERT(GPIOBaseValid(ulPort));
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ASSERT((ulIntType == GPIO_FALLING_EDGE) ||
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(ulIntType == GPIO_RISING_EDGE) || (ulIntType == GPIO_BOTH_EDGES) ||
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(ulIntType == GPIO_LOW_LEVEL) || (ulIntType == GPIO_HIGH_LEVEL));
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//
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// Set the pin interrupt type.
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//
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HWREG(ulPort + GPIO_O_IBE) = ((ulIntType & 1) ?
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(HWREG(ulPort + GPIO_O_IBE) | ucPins) :
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(HWREG(ulPort + GPIO_O_IBE) & ~(ucPins)));
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HWREG(ulPort + GPIO_O_IS) = ((ulIntType & 2) ?
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(HWREG(ulPort + GPIO_O_IS) | ucPins) :
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(HWREG(ulPort + GPIO_O_IS) & ~(ucPins)));
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HWREG(ulPort + GPIO_O_IEV) = ((ulIntType & 4) ?
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(HWREG(ulPort + GPIO_O_IEV) | ucPins) :
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(HWREG(ulPort + GPIO_O_IEV) & ~(ucPins)));
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}
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//*****************************************************************************
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//
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//! Gets the interrupt type for a pin.
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//!
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//! \param ulPort is the base address of the GPIO port.
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//! \param ucPin is the pin number.
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//!
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//! This function gets the interrupt type for a specified pin on the selected
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//! GPIO port. The pin can be configured as a falling edge, rising edge, or
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//! both edge detected interrupt, or it can be configured as a low level or
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//! high level detected interrupt. The type of interrupt detection mechanism
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//! is returned as an enumerated data type.
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//!
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//! \return Returns one of the enumerated data types described for
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//! GPIOIntTypeSet().
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//
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//*****************************************************************************
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unsigned long
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GPIOIntTypeGet(unsigned long ulPort, unsigned char ucPin)
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{
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unsigned long ulIBE, ulIS, ulIEV;
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//
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// Check the arguments.
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//
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ASSERT(GPIOBaseValid(ulPort));
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ASSERT(ucPin < 8);
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//
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// Convert from a pin number to a bit position.
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//
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ucPin = 1 << ucPin;
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//
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// Return the pin interrupt type.
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//
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ulIBE = HWREG(ulPort + GPIO_O_IBE);
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ulIS = HWREG(ulPort + GPIO_O_IS);
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ulIEV = HWREG(ulPort + GPIO_O_IEV);
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return(((ulIBE & ucPin) ? 1 : 0) | ((ulIS & ucPin) ? 2 : 0) |
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((ulIEV & ucPin) ? 4 : 0));
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}
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//*****************************************************************************
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//
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//! Sets the pad configuration for the specified pin(s).
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//!
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//! \param ulPort is the base address of the GPIO port.
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//! \param ucPins is the bit-packed representation of the pin(s).
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//! \param ulStrength specifies the output drive strength.
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//! \param ulPinType specifies the pin type.
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//!
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//! This function sets the drive strength and type for the specified pin(s)
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//! on the selected GPIO port. For pin(s) configured as input ports, the
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//! pad is configured as requested, but the only real effect on the input
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//! is the configuration of the pull-up or pull-down termination.
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//!
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//! The parameter \e ulStrength can be one of the following values:
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//!
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//! - \b GPIO_STRENGTH_2MA
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//! - \b GPIO_STRENGTH_4MA
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//! - \b GPIO_STRENGTH_8MA
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//! - \b GPIO_STRENGTH_8MA_SC
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//!
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//! where \b GPIO_STRENGTH_xMA specifies either 2, 4, or 8 mA output drive
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//! strength, and \b GPIO_OUT_STRENGTH_8MA_SC specifies 8 mA output drive with
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//! slew control.
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//!
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//! The parameter \e ulPinType can be one of the following values:
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//!
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//! - \b GPIO_PIN_TYPE_STD
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//! - \b GPIO_PIN_TYPE_STD_WPU
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//! - \b GPIO_PIN_TYPE_STD_WPD
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//! - \b GPIO_PIN_TYPE_OD
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//! - \b GPIO_PIN_TYPE_OD_WPU
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//! - \b GPIO_PIN_TYPE_OD_WPD
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//! - \b GPIO_PIN_TYPE_ANALOG
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//!
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//! where \b GPIO_PIN_TYPE_STD* specifies a push-pull pin, \b GPIO_PIN_TYPE_OD*
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//! specifies an open-drain pin, \b *_WPU specifies a weak pull-up, \b *_WPD
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//! specifies a weak pull-down, and \b GPIO_PIN_TYPE_ANALOG specifies an
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//! analog input (for the comparators).
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//!
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//! The pin(s) are specified using a bit-packed byte, where each bit that is
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//! set identifies the pin to be accessed, and where bit 0 of the byte
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//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
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//!
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//! \return None.
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//
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//*****************************************************************************
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void
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GPIOPadConfigSet(unsigned long ulPort, unsigned char ucPins,
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unsigned long ulStrength, unsigned long ulPinType)
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{
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//
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// Check the arguments.
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//
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ASSERT(GPIOBaseValid(ulPort));
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ASSERT((ulStrength == GPIO_STRENGTH_2MA) ||
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(ulStrength == GPIO_STRENGTH_4MA) ||
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(ulStrength == GPIO_STRENGTH_8MA) ||
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(ulStrength == GPIO_STRENGTH_8MA_SC));
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ASSERT((ulPinType == GPIO_PIN_TYPE_STD) ||
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(ulPinType == GPIO_PIN_TYPE_STD_WPU) ||
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(ulPinType == GPIO_PIN_TYPE_STD_WPD) ||
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(ulPinType == GPIO_PIN_TYPE_OD) ||
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(ulPinType == GPIO_PIN_TYPE_OD_WPU) ||
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(ulPinType == GPIO_PIN_TYPE_OD_WPD) ||
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(ulPinType == GPIO_PIN_TYPE_ANALOG))
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|
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//
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// Set the output drive strength.
|
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//
|
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HWREG(ulPort + GPIO_O_DR2R) = ((ulStrength & 1) ?
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(HWREG(ulPort + GPIO_O_DR2R) | ucPins) :
|
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(HWREG(ulPort + GPIO_O_DR2R) & ~(ucPins)));
|
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HWREG(ulPort + GPIO_O_DR4R) = ((ulStrength & 2) ?
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(HWREG(ulPort + GPIO_O_DR4R) | ucPins) :
|
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(HWREG(ulPort + GPIO_O_DR4R) & ~(ucPins)));
|
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HWREG(ulPort + GPIO_O_DR8R) = ((ulStrength & 4) ?
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(HWREG(ulPort + GPIO_O_DR8R) | ucPins) :
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(HWREG(ulPort + GPIO_O_DR8R) & ~(ucPins)));
|
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HWREG(ulPort + GPIO_O_SLR) = ((ulStrength & 8) ?
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(HWREG(ulPort + GPIO_O_SLR) | ucPins) :
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(HWREG(ulPort + GPIO_O_SLR) & ~(ucPins)));
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|
|
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//
|
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// Set the pin type.
|
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//
|
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HWREG(ulPort + GPIO_O_ODR) = ((ulPinType & 1) ?
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(HWREG(ulPort + GPIO_O_ODR) | ucPins) :
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(HWREG(ulPort + GPIO_O_ODR) & ~(ucPins)));
|
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HWREG(ulPort + GPIO_O_PUR) = ((ulPinType & 2) ?
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(HWREG(ulPort + GPIO_O_PUR) | ucPins) :
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(HWREG(ulPort + GPIO_O_PUR) & ~(ucPins)));
|
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HWREG(ulPort + GPIO_O_PDR) = ((ulPinType & 4) ?
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(HWREG(ulPort + GPIO_O_PDR) | ucPins) :
|
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(HWREG(ulPort + GPIO_O_PDR) & ~(ucPins)));
|
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HWREG(ulPort + GPIO_O_DEN) = ((ulPinType & 8) ?
|
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(HWREG(ulPort + GPIO_O_DEN) | ucPins) :
|
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(HWREG(ulPort + GPIO_O_DEN) & ~(ucPins)));
|
|
|
|
//
|
|
// Set the analog mode select register. This register only appears in
|
|
// DustDevil-class (and later) devices, but is a harmless write on
|
|
// Sandstorm- and Fury-class devices.
|
|
//
|
|
HWREG(ulPort + GPIO_O_AMSEL) =
|
|
((ulPinType == GPIO_PIN_TYPE_ANALOG) ?
|
|
(HWREG(ulPort + GPIO_O_AMSEL) | ucPins) :
|
|
(HWREG(ulPort + GPIO_O_AMSEL) & ~(ucPins)));
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Gets the pad configuration for a pin.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPin is the pin number.
|
|
//! \param pulStrength is a pointer to storage for the output drive strength.
|
|
//! \param pulPinType is a pointer to storage for the output drive type.
|
|
//!
|
|
//! This function gets the pad configuration for a specified pin on the
|
|
//! selected GPIO port. The values returned in \e pulStrength and
|
|
//! \e pulPinType correspond to the values used in GPIOPadConfigSet(). This
|
|
//! function also works for pin(s) configured as input pin(s); however, the
|
|
//! only meaningful data returned is whether the pin is terminated with a
|
|
//! pull-up or down resistor.
|
|
//!
|
|
//! \return None
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPadConfigGet(unsigned long ulPort, unsigned char ucPin,
|
|
unsigned long *pulStrength, unsigned long *pulPinType)
|
|
{
|
|
unsigned long ulTemp1, ulTemp2, ulTemp3, ulTemp4;
|
|
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
ASSERT(ucPin < 8);
|
|
|
|
//
|
|
// Convert from a pin number to a bit position.
|
|
//
|
|
ucPin = (1 << ucPin);
|
|
|
|
//
|
|
// Get the drive strength for this pin.
|
|
//
|
|
ulTemp1 = HWREG(ulPort + GPIO_O_DR2R);
|
|
ulTemp2 = HWREG(ulPort + GPIO_O_DR4R);
|
|
ulTemp3 = HWREG(ulPort + GPIO_O_DR8R);
|
|
ulTemp4 = HWREG(ulPort + GPIO_O_SLR);
|
|
*pulStrength = (((ulTemp1 & ucPin) ? 1 : 0) | ((ulTemp2 & ucPin) ? 2 : 0) |
|
|
((ulTemp3 & ucPin) ? 4 : 0) | ((ulTemp4 & ucPin) ? 8 : 0));
|
|
|
|
//
|
|
// Get the pin type.
|
|
//
|
|
ulTemp1 = HWREG(ulPort + GPIO_O_ODR);
|
|
ulTemp2 = HWREG(ulPort + GPIO_O_PUR);
|
|
ulTemp3 = HWREG(ulPort + GPIO_O_PDR);
|
|
ulTemp4 = HWREG(ulPort + GPIO_O_DEN);
|
|
*pulPinType = (((ulTemp1 & ucPin) ? 1 : 0) | ((ulTemp2 & ucPin) ? 2 : 0) |
|
|
((ulTemp3 & ucPin) ? 4 : 0) | ((ulTemp4 & ucPin) ? 8 : 0));
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Enables interrupts for the specified pin(s).
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! Unmasks the interrupt for the specified pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinIntEnable(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Enable the interrupts.
|
|
//
|
|
HWREG(ulPort + GPIO_O_IM) |= ucPins;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Disables interrupts for the specified pin(s).
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! Masks the interrupt for the specified pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinIntDisable(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Disable the interrupts.
|
|
//
|
|
HWREG(ulPort + GPIO_O_IM) &= ~(ucPins);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Gets interrupt status for the specified GPIO port.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param bMasked specifies whether masked or raw interrupt status is
|
|
//! returned.
|
|
//!
|
|
//! If \e bMasked is set as \b true, then the masked interrupt status is
|
|
//! returned; otherwise, the raw interrupt status will be returned.
|
|
//!
|
|
//! \return Returns a bit-packed byte, where each bit that is set identifies
|
|
//! an active masked or raw interrupt, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//! Bits 31:8 should be ignored.
|
|
//
|
|
//*****************************************************************************
|
|
long
|
|
GPIOPinIntStatus(unsigned long ulPort, tBoolean bMasked)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Return the interrupt status.
|
|
//
|
|
if(bMasked)
|
|
{
|
|
return(HWREG(ulPort + GPIO_O_MIS));
|
|
}
|
|
else
|
|
{
|
|
return(HWREG(ulPort + GPIO_O_RIS));
|
|
}
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Clears the interrupt for the specified pin(s).
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! Clears the interrupt for the specified pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note Since there is a write buffer in the Cortex-M3 processor, it may take
|
|
//! several clock cycles before the interrupt source is actually cleared.
|
|
//! Therefore, it is recommended that the interrupt source be cleared early in
|
|
//! the interrupt handler (as opposed to the very last action) to avoid
|
|
//! returning from the interrupt handler before the interrupt source is
|
|
//! actually cleared. Failure to do so may result in the interrupt handler
|
|
//! being immediately reentered (since NVIC still sees the interrupt source
|
|
//! asserted).
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinIntClear(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Clear the interrupts.
|
|
//
|
|
HWREG(ulPort + GPIO_O_ICR) = ucPins;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Registers an interrupt handler for a GPIO port.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param pfnIntHandler is a pointer to the GPIO port interrupt handling
|
|
//! function.
|
|
//!
|
|
//! This function will ensure that the interrupt handler specified by
|
|
//! \e pfnIntHandler is called when an interrupt is detected from the selected
|
|
//! GPIO port. This function will also enable the corresponding GPIO interrupt
|
|
//! in the interrupt controller; individual pin interrupts and interrupt
|
|
//! sources must be enabled with GPIOPinIntEnable().
|
|
//!
|
|
//! \sa IntRegister() for important information about registering interrupt
|
|
//! handlers.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPortIntRegister(unsigned long ulPort, void (*pfnIntHandler)(void))
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Get the interrupt number associated with the specified GPIO.
|
|
//
|
|
ulPort = GPIOGetIntNumber(ulPort);
|
|
|
|
//
|
|
// Register the interrupt handler.
|
|
//
|
|
IntRegister(ulPort, pfnIntHandler);
|
|
|
|
//
|
|
// Enable the GPIO interrupt.
|
|
//
|
|
IntEnable(ulPort);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Removes an interrupt handler for a GPIO port.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//!
|
|
//! This function will unregister the interrupt handler for the specified
|
|
//! GPIO port. This function will also disable the corresponding
|
|
//! GPIO port interrupt in the interrupt controller; individual GPIO interrupts
|
|
//! and interrupt sources must be disabled with GPIOPinIntDisable().
|
|
//!
|
|
//! \sa IntRegister() for important information about registering interrupt
|
|
//! handlers.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPortIntUnregister(unsigned long ulPort)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Get the interrupt number associated with the specified GPIO.
|
|
//
|
|
ulPort = GPIOGetIntNumber(ulPort);
|
|
|
|
//
|
|
// Disable the GPIO interrupt.
|
|
//
|
|
IntDisable(ulPort);
|
|
|
|
//
|
|
// Unregister the interrupt handler.
|
|
//
|
|
IntUnregister(ulPort);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Reads the values present of the specified pin(s).
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The values at the specified pin(s) are read, as specified by \e ucPins.
|
|
//! Values are returned for both input and output pin(s), and the value
|
|
//! for pin(s) that are not specified by \e ucPins are set to 0.
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \return Returns a bit-packed byte providing the state of the specified
|
|
//! pin, where bit 0 of the byte represents GPIO port pin 0, bit 1 represents
|
|
//! GPIO port pin 1, and so on. Any bit that is not specified by \e ucPins
|
|
//! is returned as a 0. Bits 31:8 should be ignored.
|
|
//
|
|
//*****************************************************************************
|
|
long
|
|
GPIOPinRead(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Return the pin value(s).
|
|
//
|
|
return(HWREG(ulPort + (GPIO_O_DATA + (ucPins << 2))));
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Writes a value to the specified pin(s).
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//! \param ucVal is the value to write to the pin(s).
|
|
//!
|
|
//! Writes the corresponding bit values to the output pin(s) specified by
|
|
//! \e ucPins. Writing to a pin configured as an input pin has no effect.
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinWrite(unsigned long ulPort, unsigned char ucPins, unsigned char ucVal)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Write the pins.
|
|
//
|
|
HWREG(ulPort + (GPIO_O_DATA + (ucPins << 2))) = ucVal;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use as analog-to-digital converter inputs.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The analog-to-digital converter input pins must be properly configured
|
|
//! to function correctly on DustDevil-class devices. This function provides
|
|
//! the proper configuration for those pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into an ADC input; it only
|
|
//! configures an ADC input pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeADC(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be inputs.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_IN);
|
|
|
|
//
|
|
// Set the pad(s) for analog operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_ANALOG);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use as a CAN device.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The CAN pins must be properly configured for the CAN peripherals to
|
|
//! function correctly. This function provides a typical configuration for
|
|
//! those pin(s); other configurations may work as well depending upon the
|
|
//! board setup (for example, using the on-chip pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a CAN pin; it only
|
|
//! configures a CAN pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeCAN(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be inputs.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use as an analog comparator input.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The analog comparator input pins must be properly configured for the analog
|
|
//! comparator to function correctly. This function provides the proper
|
|
//! configuration for those pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into an analog comparator input;
|
|
//! it only configures an analog comparator pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeComparator(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be inputs.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_IN);
|
|
|
|
//
|
|
// Set the pad(s) for analog operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_ANALOG);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use as GPIO inputs.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The GPIO pins must be properly configured in order to function correctly as
|
|
//! GPIO inputs; this is especially true of Fury-class devices where the
|
|
//! digital input enable is turned off by default. This function provides the
|
|
//! proper configuration for those pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeGPIOInput(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be inputs.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_IN);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use as GPIO outputs.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The GPIO pins must be properly configured in order to function correctly as
|
|
//! GPIO outputs; this is especially true of Fury-class devices where the
|
|
//! digital input enable is turned off by default. This function provides the
|
|
//! proper configuration for those pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeGPIOOutput(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be outputs.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_OUT);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use as GPIO open drain outputs.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The GPIO pins must be properly configured in order to function correctly as
|
|
//! GPIO outputs; this is especially true of Fury-class devices where the
|
|
//! digital input enable is turned off by default. This function provides the
|
|
//! proper configuration for those pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeGPIOOutputOD(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be outputs.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_OUT);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_OD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the I2C peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The I2C pins must be properly configured for the I2C peripheral to function
|
|
//! correctly. This function provides the proper configuration for those
|
|
//! pin(s).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into an I2C pin; it only
|
|
//! configures an I2C pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeI2C(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for open-drain operation with a weak pull-up.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_OD_WPU);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the PWM peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The PWM pins must be properly configured for the PWM peripheral to function
|
|
//! correctly. This function provides a typical configuration for those
|
|
//! pin(s); other configurations may work as well depending upon the board
|
|
//! setup (for example, using the on-chip pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a PWM pin; it only
|
|
//! configures a PWM pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypePWM(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the QEI peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The QEI pins must be properly configured for the QEI peripheral to function
|
|
//! correctly. This function provides a typical configuration for those
|
|
//! pin(s); other configurations may work as well depending upon the board
|
|
//! setup (for example, not using the on-chip pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a QEI pin; it only
|
|
//! configures a QEI pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeQEI(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation with a weak pull-up.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the SSI peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The SSI pins must be properly configured for the SSI peripheral to function
|
|
//! correctly. This function provides a typical configuration for those
|
|
//! pin(s); other configurations may work as well depending upon the board
|
|
//! setup (for example, using the on-chip pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a SSI pin; it only
|
|
//! configures a SSI pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeSSI(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the Timer peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The CCP pins must be properly configured for the timer peripheral to
|
|
//! function correctly. This function provides a typical configuration for
|
|
//! those pin(s); other configurations may work as well depending upon the
|
|
//! board setup (for example, using the on-chip pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a timer pin; it only
|
|
//! configures a timer pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeTimer(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the UART peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The UART pins must be properly configured for the UART peripheral to
|
|
//! function correctly. This function provides a typical configuration for
|
|
//! those pin(s); other configurations may work as well depending upon the
|
|
//! board setup (for example, using the on-chip pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a UART pin; it only
|
|
//! configures a UART pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeUART(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the USB peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! Some USB digital pins must be properly configured for the USB peripheral to
|
|
//! function correctly. This function provides a typical configuration for
|
|
//! the digital USB pin(s); other configurations may work as well depending
|
|
//! upon the board setup (for example, using the on-chip pull-ups).
|
|
//!
|
|
//! This function should only be used with EPEN and PFAULT pins as all other
|
|
//! USB pins are analog in nature or are not used in devices without OTG
|
|
//! functionality.
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a USB pin; it only
|
|
//! configures a USB pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeUSBDigital(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the USB peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! Some USB analog pins must be properly configured for the USB peripheral to
|
|
//! function correctly. This function provides the proper configuration for
|
|
//! any USB pin(s). This can also be used to configure the EPEN and PFAULT pins
|
|
//! so that they are no longer used by the USB controller.
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a USB pin; it only
|
|
//! configures a USB pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeUSBAnalog(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be inputs.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_IN);
|
|
|
|
//
|
|
// Set the pad(s) for analog operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_ANALOG);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the I2S peripheral.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! Some I2S pins must be properly configured for the I2S peripheral to
|
|
//! function correctly. This function provides a typical configuration for
|
|
//! the digital I2S pin(s); other configurations may work as well depending
|
|
//! upon the board setup (for example, using the on-chip pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into a I2S pin; it only
|
|
//! configures a I2S pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeI2S(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the Ethernet peripheral as LED signals.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The Ethernet peripheral provides two signals that can be used to drive
|
|
//! an LED (e.g. for link status/activity). This function provides a typical
|
|
//! configuration for the pins.
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into an Ethernet LED pin; it only
|
|
//! configures an Ethernet LED pin for proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeEthernetLED(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures pin(s) for use by the external peripheral interface.
|
|
//!
|
|
//! \param ulPort is the base address of the GPIO port.
|
|
//! \param ucPins is the bit-packed representation of the pin(s).
|
|
//!
|
|
//! The external peripheral interface pins must be properly configured for the
|
|
//! external peripheral interface to function correctly. This function
|
|
//! provides a typica configuration for those pin(s); other configurations may
|
|
//! work as well depending upon the board setup (for exampe, using the on-chip
|
|
//! pull-ups).
|
|
//!
|
|
//! The pin(s) are specified using a bit-packed byte, where each bit that is
|
|
//! set identifies the pin to be accessed, and where bit 0 of the byte
|
|
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, and so on.
|
|
//!
|
|
//! \note This cannot be used to turn any pin into an external peripheral
|
|
//! interface pin; it only configures an external peripheral interface pin for
|
|
//! proper operation.
|
|
//!
|
|
//! \return None.
|
|
//
|
|
//*****************************************************************************
|
|
void
|
|
GPIOPinTypeEPI(unsigned long ulPort, unsigned char ucPins)
|
|
{
|
|
//
|
|
// Check the arguments.
|
|
//
|
|
ASSERT(GPIOBaseValid(ulPort));
|
|
|
|
//
|
|
// Make the pin(s) be peripheral controlled.
|
|
//
|
|
GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);
|
|
|
|
//
|
|
// Set the pad(s) for standard push-pull operation.
|
|
//
|
|
GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! Configures the alternate function of a GPIO pin.
|
|
//!
|
|
//! \param ulPinConfig is the pin configuration value, specified as only one of
|
|
//! the \b GPIO_P??_??? values.
|
|
//!
|
|
//! This function configures the pin mux that selects the peripheral function
|
|
//! associated with a particular GPIO pin. Only one peripheral function at a
|
|
//! time can be associated with a GPIO pin, and each peripheral function should
|
|
//! only be associated with a single GPIO pin at a time (despite the fact that
|
|
//! many of them can be associated with more than one GPIO pin).
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|
//!
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|
//! \note This function is only valid on Tempest-class devices.
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|
//!
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|
//! \return None.
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|
//
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|
//*****************************************************************************
|
|
void
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|
GPIOPinConfigure(unsigned long ulPinConfig)
|
|
{
|
|
unsigned long ulBase, ulShift;
|
|
|
|
//
|
|
// Check the argument.
|
|
//
|
|
ASSERT(((ulPinConfig >> 16) & 0xff) < 9);
|
|
ASSERT(((ulPinConfig >> 8) & 0xe3) == 0);
|
|
|
|
//
|
|
// Extract the base address index from the input value.
|
|
//
|
|
ulBase = (ulPinConfig >> 16) & 0xff;
|
|
|
|
//
|
|
// Get the base address of the GPIO module, selecting either the APB or the
|
|
// AHB aperture as appropriate.
|
|
//
|
|
if(HWREG(SYSCTL_GPIOHSCTL) & (1 << ulBase))
|
|
{
|
|
ulBase = g_pulGPIOBaseAddrs[(ulBase << 1) + 1];
|
|
}
|
|
else
|
|
{
|
|
ulBase = g_pulGPIOBaseAddrs[ulBase << 1];
|
|
}
|
|
|
|
//
|
|
// Extract the shift from the input value.
|
|
//
|
|
ulShift = (ulPinConfig >> 8) & 0xff;
|
|
|
|
//
|
|
// Write the requested pin muxing value for this GPIO pin.
|
|
//
|
|
HWREG(ulBase + GPIO_O_PCTL) = ((HWREG(ulBase + GPIO_O_PCTL) &
|
|
~(0xf << ulShift)) |
|
|
((ulPinConfig & 0xf) << ulShift));
|
|
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
// Close the Doxygen group.
|
|
//! @}
|
|
//
|
|
//*****************************************************************************
|