git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3457 35acf78f-673a-0410-8e92-d51de3d6d3f4
gdisirio
parent
2e4d6bc9ab
commit
8912d9fea2
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011 Giovanni Di Sirio,
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2011 Florian Goebe, Chair for Computer Science 11,
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RWTH Aachen University
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM32/ext_lld.c
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* @brief STM32 EXT subsystem low level driver source.
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*
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* @addtogroup EXT
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_EXT || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief EXTDA driver identifier.
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*/
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EXTDriver EXTDA;
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512)
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/**
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* @brief EXTDB driver identifier.
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*/
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EXTDriver EXTDB;
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#endif
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief Handles external interrupts.
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*
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* @param[in] extp pointer to the driver that received the interrupt
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*/
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static void ext_lld_serveInterrupt(EXTDriver *extp) {
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uint32_t irqFlags;
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uint32_t ch;
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chSysLockFromIsr();
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/* Read flags of pending PIO interrupts.*/
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irqFlags = extp->pio->PIO_ISR;
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/* Call callback function for any pending interrupt.*/
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for(ch = 0; ch < 32; ch++) {
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/* Check if the channel is activated and if its IRQ flag is set.*/
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if((extp->config->channels[ch].mode &
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EXT_CH_MODE_ENABLED & EXT_CH_MODE_EDGES_MASK)
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&& ((1 << ch) & irqFlags)) {
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(extp->config->channels[ch].cb)(extp, ch);
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}
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}
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chSysUnlockFromIsr();
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AT91C_BASE_AIC->AIC_EOICR = 0;
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}
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/**
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* @brief EXTI[0] interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(EXTIA_IRQHandler) {
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CH_IRQ_PROLOGUE();
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ext_lld_serveInterrupt(&EXTDA);
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CH_IRQ_EPILOGUE();
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}
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512)
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/**
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* @brief EXTI[1] interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(EXTIB_IRQHandler) {
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CH_IRQ_PROLOGUE();
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ext_lld_serveInterrupt(&EXTDB);
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CH_IRQ_EPILOGUE();
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}
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#endif
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level EXT driver initialization.
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*
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* @notapi
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*/
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void ext_lld_init(void) {
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/* Driver initialization.*/
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extObjectInit(&EXTDA);
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/* Set PIO base addresses.*/
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EXTDA.pio = AT91C_BASE_PIOA;
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/* Set peripheral IDs.*/
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EXTDA.pid = AT91C_ID_PIOA;
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512)
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/* Aame for PIOB.*/
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extObjectInit(&EXTDB);
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EXTDB.pio = AT91C_BASE_PIOB;
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EXTDB.pid = AT91C_ID_PIOB;
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#endif
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}
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/**
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* @brief Configures and activates the EXT peripheral.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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*
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* @notapi
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*/
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void ext_lld_start(EXTDriver *extp) {
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uint16_t ch;
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uint32_t ier = 0;
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const EXTConfig *config = extp->config;
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switch(extp->pid) {
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case AT91C_ID_PIOA:
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AIC_ConfigureIT(AT91C_ID_PIOA, SAM7_computeSMR(config->mode,
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config->priority),
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EXTIA_IRQHandler);
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break;
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512)
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case AT91C_ID_PIOB:
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AIC_ConfigureIT(AT91C_ID_PIOB, SAM7_computeSMR(config->mode,
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config->priority),
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EXTIB_IRQHandler);
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break;
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#endif
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}
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/* Enable and Disable channels with respect to config.*/
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for(ch = 0; ch < EXT_MAX_CHANNELS; ch++) {
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ier |= (config->channels[ch].mode & EXT_CH_MODE_EDGES_MASK & EXT_CH_MODE_ENABLED ? 1 : 0) << ch;
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}
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extp->pio->PIO_IER = ier;
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extp->pio->PIO_IDR = ~ier;
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/* Enable interrupt on corresponding PIO port in AIC.*/
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AIC_EnableIT(extp->pid);
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}
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/**
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* @brief Deactivates the EXT peripheral.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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*
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* @notapi
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*/
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void ext_lld_stop(EXTDriver *extp) {
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/* Disable interrupt on corresponding PIO port in AIC.*/
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AIC_DisableIT(extp->pid);
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}
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/**
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* @brief Enables an EXT channel.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] channel channel to be enabled
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*
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* @notapi
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*/
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void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel) {
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extp->pio->PIO_IER = (1 << channel);
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}
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/**
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* @brief Disables an EXT channel.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] channel channel to be disabled
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*
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* @notapi
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*/
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void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel) {
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extp->pio->PIO_IDR = (1 << channel);
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}
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#endif /* HAL_USE_EXT */
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/** @} */
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@ -0,0 +1,249 @@
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011 Giovanni Di Sirio,
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2011 Florian Goebe, Chair for Computer Science 11,
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RWTH Aachen University
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file AT91SAM7/ext_lld.h
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* @brief AT91SAM7 EXT subsystem low level driver header.
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*
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* @addtogroup EXT
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* @{
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*/
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#ifndef _EXT_LLD_H_
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#define _EXT_LLD_H_
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#if HAL_USE_EXT || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @brief Pointer to the SAM7 AIC register block.
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*/
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#define SAM7_EXT_AIC ((AT91PS_AIC *)AT91C_BASE_AIC)
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/**
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* @brief Number of channels within one ext driver.
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*/
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#define EXT_MAX_CHANNELS 32
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/**
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* @brief Mask of priority bits in interrupt mode register.
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*/
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#define SAM7_EXT_PRIORITY_MASK 0x00000007
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/**
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* @brief Shifter for priority bits in interrupt mode register.
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*/
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#define SAM7_EXT_PRIORITY_SHIFTER 0
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/**
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* @brief Shifter for mode bits in interrupt mode register.
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*/
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#define SAM7_EXT_MODE_SHIFTER 5
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/*
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* On the SAM7 architecture, a single channel can only be enables or disabled
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* Hence, undefine the other channel mode constants
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*/
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#ifdef EXT_CH_MODE_RISING_EDGE
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#undef EXT_CH_MODE_RISING_EDGE
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#endif
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#ifdef EXT_CH_MODE_FALLING_EDGE
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#undef EXT_CH_MODE_FALLING_EDGE
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#endif
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#ifdef EXT_CH_MODE_BOTH_EDGES
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#undef EXT_CH_MODE_BOTH_EDGES
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#endif
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/**
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* @name EXT channels mode
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* @{
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*/
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#define EXT_CH_MODE_ENABLED 1 /**< @brief Channel is enabled. */
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/** @} */
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/**
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* @name EXT drivers mode
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* @{
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*/
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/**
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* @brief Mask for modes.
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*/
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#define SAM7_EXT_MODE_MASK AT91C_AIC_SRCTYPE
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/**
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* @brief Falling edge callback.
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*/
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#define SAM7_EXT_MODE_FALLING_EDGE AT91C_AIC_SRCTYPE_EXT_NEGATIVE_EDGE
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/**
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* @brief Rising edge callback.
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*/
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#define SAM7_EXT_MODE_RISING_EDGE AT91C_AIC_SRCTYPE_POSITIVE_EDGE
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/**
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* @brief High-level callback.
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*/
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#define SAM7_EXT_MODE_HIGH_LEVEL AT91C_AIC_SRCTYPE_HIGH_LEVEL
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/**
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* @brief Low-level callback.
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*/
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#define SAM7_EXT_MODE_LOW_LEVEL AT91C_AIC_SRCTYPE_EXT_LOW_LEVEL
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/** @} */
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/**
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* @name EXT drivers priorities
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* @{
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*/
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#define SAM7_EXT_PRIOR_HIGHEST AT91C_AIC_PRIOR_HIGHEST
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#define SAM7_EXT_PRIOR_LOWEST AT91C_AIC_PRIOR_LOWEST
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/** @} */
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief EXT channel identifier.
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*/
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typedef uint32_t expchannel_t;
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/**
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* @brief Type of an EXT generic notification callback.
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*
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* @param[in] extp pointer to the @p EXPDriver object triggering the
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* callback
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*/
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typedef void (*extcallback_t)(EXTDriver *extp, expchannel_t channel);
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/**
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* @brief Channel configuration structure.
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*/
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typedef struct {
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/**
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* @brief Channel mode.
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*/
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uint32_t mode;
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/**
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* @brief Channel callback.
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* @details In the STM32 implementation a @p NULL callback pointer is
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* valid and configures the channel as an event sources instead
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* of an interrupt source.
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*/
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extcallback_t cb;
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} EXTChannelConfig;
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/**
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* @brief Driver configuration structure.
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* @note It could be empty on some architectures.
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*/
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typedef struct {
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/**
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* @brief Channel configurations.
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*/
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EXTChannelConfig channels[EXT_MAX_CHANNELS];
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/* End of the mandatory fields.*/
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/**
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* @brief interrupt mode.
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*/
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uint32_t mode;
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/**
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* @brief interrupt priority.
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*/
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uint32_t priority;
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} EXTConfig;
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/**
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* @brief Structure representing an EXT driver.
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*/
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struct EXTDriver {
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/**
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* @brief Driver state.
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*/
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extstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const EXTConfig *config;
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/* End of the mandatory fields.*/
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/**
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* @brief Pointer to the corresponding PIO registers block.
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*/
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AT91PS_PIO pio;
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/**
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* @brief peripheral ID of the corresponding PIO block.
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*/
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uint32_t pid;
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @brief Computes the content for the interrupt source mode register.
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*/
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#define SAM7_computeSMR(mode, prio) ( \
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((mode & SAM7_EXT_MODE_MASK) << SAM7_EXT_MODE_SHIFTER) | \
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((prio & SAM7_EXT_PRIORITY_MASK) << SAM7_EXT_PRIORITY_SHIFTER) \
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)
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if !defined(__DOXYGEN__)
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extern EXTDriver EXTDA;
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512)
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extern EXTDriver EXTDB;
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#endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void ext_lld_init(void);
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void ext_lld_start(EXTDriver *extp);
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void ext_lld_stop(EXTDriver *extp);
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void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel);
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void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_EXT */
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#endif /* _EXT_LLD_H_ */
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/** @} */
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@ -1,6 +1,7 @@
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# List of all the AT91SAM7 platform files.
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PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/AT91SAM7/hal_lld.c \
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${CHIBIOS}/os/hal/platforms/AT91SAM7/pal_lld.c \
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${CHIBIOS}/os/hal/platforms/AT91SAM7/ext_lld.c \
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${CHIBIOS}/os/hal/platforms/AT91SAM7/serial_lld.c \
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${CHIBIOS}/os/hal/platforms/AT91SAM7/spi_lld.c \
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${CHIBIOS}/os/hal/platforms/AT91SAM7/mac_lld.c \
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|
|
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@ -76,6 +76,8 @@
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*** 2.3.4 ***
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- FIX: Fixed broken TIM8 support in STM32 PWM driver (bug 3418620).
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- FIX: Fixed halconf.h file corrupted in some STM32 demos (bug 3418626).
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- NEW: Added EXT driver implementation for AT91SAM7x contributed by Florian.
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(TODO: Test application missing).
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- NEW: Updated USB driver model and STM32 implementation and fixed several
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problems.
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- Changed the API to move buffer copy operations out of critical zones.
|
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|
|
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|||
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