EXTI driver.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@12432 110e8d01-0319-4d1e-a829-52ad28d1bb01
This commit is contained in:
Giovanni Di Sirio
parent
db6f9df412
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PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/EXTIv1/stm32_exti.c
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PLATFORMINC += $(CHIBIOS)/os/hal/ports/STM32/LLD/EXTIv1
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STM32 EXTIv1 driver.
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Driver capability:
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- Support for the EXTI peripheral.
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The file registry must export:
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STM32_EXTI_NUM_LINES - Number of EXTI lines, it can be between 0 and 63.
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STM32_EXTI_IMR1_MASK - Mask of the fixed lines that must not be
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handled by the driver (0..31).
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STM32_EXTI_IMR2_MASK - Mask of the fixed lines that must not be
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handled by the driver (32..63).
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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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 EXTIv1/stm32_exti.c
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* @brief EXTI helper driver code.
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*
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* @addtogroup STM32_EXTI
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* @details EXTI sharing helper driver.
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* @{
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*/
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#include "hal.h"
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/* The following macro is only defined if some driver requiring EXTI services
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has been enabled.*/
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#if defined(STM32_EXTI_REQUIRED) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/* Handling differences in ST headers.*/
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#if !defined(STM32L4XX) && !defined(STM32L4XXP)
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#define EMR1 EMR
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#define IMR1 IMR
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#define PR1 PR
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#define RTSR1 RTSR
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#define FTSR1 FTSR
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#endif
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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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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief STM32 EXTI group 1 lines initialization.
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*
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* @param[in] mask mask of group 1 lines to be initialized
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* @param[in] mode initialization mode
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*
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* @api
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*/
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void extiEnableGroup1(uint32_t mask, extimode_t mode) {
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/* Masked out lines must not be touched by this driver.*/
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osalDbgAssert((mask & STM32_EXTI_IMR1_MASK) == 0U, "fixed line");
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if ((mode & EXTI_MODE_EDGES_MASK) == 0U) {
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/* Disabling channels.*/
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EXTI->IMR1 &= ~mask;
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EXTI->EMR1 &= ~mask;
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EXTI->RTSR1 &= ~mask;
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EXTI->FTSR1 &= ~mask;
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EXTI->PR1 = mask;
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}
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else {
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/* Programming edge registers.*/
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if (mode & EXTI_MODE_RISING_EDGE) {
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EXTI->RTSR1 |= mask;
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}
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else {
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EXTI->RTSR1 &= ~mask;
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}
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if (mode & EXTI_MODE_FALLING_EDGE) {
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EXTI->FTSR1 |= mask;
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}
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else {
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EXTI->FTSR1 &= ~mask;
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}
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/* Programming interrupt and event registers.*/
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if ((mode & EXTI_MODE_ACTION_MASK) == EXTI_MODE_ACTION_INTERRUPT) {
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EXTI->IMR1 |= mask;
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EXTI->EMR1 &= ~mask;
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}
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else {
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EXTI->EMR1 |= mask;
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EXTI->IMR1 &= ~mask;
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}
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}
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}
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#if (STM32_EXTI_NUM_LINES > 32) || defined(__DOXYGEN__)
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/**
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* @brief STM32 EXTI group 2 lines initialization.
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*
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* @param[in] mask mask of group 2 lines to be initialized
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* @param[in] mode initialization mode
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*
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* @api
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*/
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void extiEnableGroup2(uint32_t mask, extimode_t mode) {
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/* Masked out lines must not be touched by this driver.*/
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osalDbgAssert((mask & STM32_EXTI_IMR2_MASK) == 0U, "fixed line");
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if ((mode & EXTI_MODE_EDGES_MASK) == 0U) {
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/* Disabling channels.*/
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EXTI->IMR2 &= ~mask;
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EXTI->EMR2 &= ~mask;
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EXTI->RTSR2 &= ~mask;
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EXTI->FTSR2 &= ~mask;
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EXTI->PR2 = mask;
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}
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else {
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/* Programming edge registers.*/
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if (mode & EXTI_MODE_RISING_EDGE) {
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EXTI->RTSR2 |= mask;
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}
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else {
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EXTI->RTSR2 &= ~mask;
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}
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if (mode & EXTI_MODE_FALLING_EDGE) {
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EXTI->FTSR2 |= mask;
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}
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else {
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EXTI->FTSR2 &= ~mask;
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}
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/* Programming interrupt and event registers.*/
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if ((mode & EXTI_MODE_ACTION_MASK) == EXTI_MODE_ACTION_INTERRUPT) {
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EXTI->IMR2 |= mask;
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EXTI->EMR2 &= ~mask;
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}
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else {
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EXTI->EMR2 |= mask;
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EXTI->IMR2 &= ~mask;
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}
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}
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}
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#endif /* STM32_EXTI_NUM_LINES > 32 */
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/**
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* @brief STM32 EXTI line initialization.
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*
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* @param[in] line line to be initialized
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* @param[in] mode initialization mode
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*
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* @api
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*/
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void extiEnableLine(extiline_t line, extimode_t mode) {
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uint32_t mask = (1U << (line & 0x1FU));
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osalDbgCheck(line < STM32_EXTI_NUM_LINES);
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osalDbgCheck((mode & ~EXTI_MODE_MASK) == 0U);
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#if STM32_EXTI_NUM_LINES > 32
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if (line < 32) {
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#endif
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extiEnableGroup1(mask, mode);
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#if STM32_EXTI_NUM_LINES > 32
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}
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else {
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extiEnableGroup2(mask, mode);
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}
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#endif
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}
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/**
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* @brief STM32 EXTI group 1 IRQ status clearing.
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*
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* @param[in] mask mask of group 1 lines to be initialized
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*
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* @api
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*/
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void extiClearGroup1(uint32_t mask) {
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/* Masked out lines must not be touched by this driver.*/
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osalDbgAssert((mask & STM32_EXTI_IMR1_MASK) == 0U, "fixed line");
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EXTI->PR1 = mask;
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}
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#if (STM32_EXTI_NUM_LINES > 32) || defined(__DOXYGEN__)
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/**
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* @brief STM32 EXTI group 2 IRQ status clearing.
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*
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* @param[in] mask mask of group 2 lines to be initialized
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*
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* @api
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*/
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void extiClearGroup2(uint32_t mask) {
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/* Masked out lines must not be touched by this driver.*/
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osalDbgAssert((mask & STM32_EXTI_IMR2_MASK) == 0U, "fixed line");
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EXTI->PR2 = mask;
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}
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#endif /* STM32_EXTI_NUM_LINES > 32 */
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/**
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* @brief STM32 EXTI line IRQ status clearing.
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*
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* @param[in] line line to be initialized
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*
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* @api
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*/
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void extiClearLine(extiline_t line) {
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uint32_t mask = (1U << (line & 0x1FU));
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osalDbgCheck(line < STM32_EXTI_NUM_LINES);
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#if STM32_EXTI_NUM_LINES > 32
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if (line < 32) {
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#endif
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extiClearGroup1(mask);
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#if STM32_EXTI_NUM_LINES > 32
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}
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else {
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extiClearGroup2(mask);
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}
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#endif
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}
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#endif /* STM32_EXTI_REQUIRED */
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/** @} */
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@ -0,0 +1,112 @@
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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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 EXTIv1/stm32_exti.h
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* @brief EXTI helper driver header.
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*
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* @addtogroup STM32_EXTI
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* @{
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*/
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#ifndef STM32_EXTI_H
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#define STM32_EXTI_H
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @name EXTI channel modes
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* @{
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*/
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#define EXTI_MODE_MASK 7U /**< @brief Mode parameter mask. */
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#define EXTI_MODE_EDGES_MASK 3U /**< @brief Edges field mask. */
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#define EXTI_MODE_DISABLED 0U /**< @brief Channel disabled. */
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#define EXTI_MODE_RISING_EDGE 1U /**< @brief Rising edge callback. */
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#define EXTI_MODE_FALLING_EDGE 2U /**< @brief Falling edge callback. */
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#define EXTI_MODE_BOTH_EDGES 3U /**< @brief Both edges callback. */
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#define EXTI_MODE_ACTION_MASK 4U /**< @brief Action field mask. */
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#define EXTI_MODE_ACTION_INTERRUPT 0U /**< @brief Interrupt mode. */
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#define EXTI_MODE_ACTION_EVENT 4U /**< @brief Event mode. */
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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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#if !defined(STM32_EXTI_NUM_LINES)
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#error "STM32_EXTI_NUM_LINES not defined in registry"
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#endif
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#if (STM32_EXTI_NUM_LINES < 0) || (STM32_EXTI_NUM_LINES > 63)
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#error "invalid STM32_EXTI_NUM_LINES value"
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#endif
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#if !defined(STM32_EXTI_IMR1_MASK)
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#error "STM32_EXTI_IMR1_MASK not defined in registry"
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#endif
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#if STM32_EXTI_NUM_LINES > 32
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#if !defined(STM32_EXTI_IMR2_MASK)
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#error "STM32_EXTI_IMR2_MASK not defined in registry"
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#endif
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#endif
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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 Type of an EXTI line identifier.
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*/
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typedef uint32_t extiline_t;
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/**
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* @brief Type of an EXTI line mode.
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*/
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typedef uint32_t extimode_t;
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void extiEnableGroup1(uint32_t mask, extimode_t mode);
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void extiClearGroup1(uint32_t mask);
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#if (STM32_EXTI_NUM_LINES > 32) || defined(__DOXYGEN__)
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void extiEnableGroup2(uint32_t mask, extimode_t mode);
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void extiClearGroup2(uint32_t mask);
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#endif /* STM32_EXTI_NUM_LINES > 32 */
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void extiEnableLine(extiline_t line, extimode_t mode);
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void extiClearLine(extiline_t line);
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#ifdef __cplusplus
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}
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#endif
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#endif /* STM32_EXTI_H */
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/** @} */
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