160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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LPC122x EXT driver - Copyright (C) 2013 Marcin Jokel
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file LPC122x/ext_lld_isr.c
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* @brief LPC122x EXT subsystem low level driver ISR code.
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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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#include "ext_lld_isr.h"
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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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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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#if LPC122x_EXT_USE_EXT0 || LPC122x_EXT_USE_EXT1 || LPC122x_EXT_USE_EXT2 || \
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defined(__DOXYGEN__)
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/**
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* @brief I2C error handler.
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*
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* @param[in] i2cp pointer to the @p I2CDriver object
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*
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* @notapi
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*/
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static void ext_lld_serve_interrupt(EXTDriver *extp) {
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uint32_t port_stat;
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uint8_t i;
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port_stat = extp->gpio->MIS; /* Read interrupt status */
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extp->gpio->IC = port_stat; /* Clear interrupt flags */
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for (i = 0; i < EXT_MAX_CHANNELS; i++) {
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if (port_stat & 0x01) {
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extp->config->channels[i].cb(extp, i);
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}
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port_stat = port_stat >> 1;
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}
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}
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#endif
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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#if LPC122x_EXT_USE_EXT0 || defined(__DOXYGEN__)
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/**
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* @brief PIO0 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(VectorA4) {
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CH_IRQ_PROLOGUE();
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ext_lld_serve_interrupt(&EXTD0);
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CH_IRQ_EPILOGUE();
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}
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#endif
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#if LPC122x_EXT_USE_EXT1 || defined(__DOXYGEN__)
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/**
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* @brief PIO1 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(VectorA8) {
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CH_IRQ_PROLOGUE();
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ext_lld_serve_interrupt(&EXTD1);
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CH_IRQ_EPILOGUE();
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}
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#endif
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#if LPC122x_EXT_USE_EXT2 || defined(__DOXYGEN__)
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/**
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* @brief PIO2 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(VectorAC) {
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CH_IRQ_PROLOGUE();
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ext_lld_serve_interrupt(&EXTD2);
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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 Enables EXTI IRQ sources.
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*
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* @notapi
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*/
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void ext_lld_exti_irq_enable(extirq_t irqn) {
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uint32_t pmask;
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switch (irqn) {
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case EXTI0_IRQ:
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pmask = LPC122x_EXT_EXTI0_IRQ_PRIORITY;
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break;
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case EXTI1_IRQ:
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pmask = LPC122x_EXT_EXTI1_IRQ_PRIORITY;
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break;
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case EXTI2_IRQ:
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pmask = LPC122x_EXT_EXTI2_IRQ_PRIORITY;
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break;
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}
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nvicEnableVector(EINT0_IRQn + irqn, CORTEX_PRIORITY_MASK(pmask));
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}
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/**
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* @brief Disables EXTI IRQ sources.
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*
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* @notapi
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*/
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void ext_lld_exti_irq_disable(extirq_t irqn) {
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nvicDisableVector(EINT0_IRQn + irqn);
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}
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#endif /* HAL_USE_EXT */
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/** @} */
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