222 lines
6.5 KiB
C
222 lines
6.5 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @file STM32/ext_lld.c
|
|
* @brief STM32 EXT subsystem low level driver source.
|
|
*
|
|
* @addtogroup EXT
|
|
* @{
|
|
*/
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
#if HAL_USE_EXT || defined(__DOXYGEN__)
|
|
|
|
#include "ext_lld_isr.h"
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local definitions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported variables. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief EXTD1 driver identifier.
|
|
*/
|
|
EXTDriver EXTD1;
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local variables and types. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local functions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver interrupt handlers. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Low level EXT driver initialization.
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_init(void) {
|
|
|
|
/* Driver initialization.*/
|
|
extObjectInit(&EXTD1);
|
|
}
|
|
|
|
/**
|
|
* @brief Configures and activates the EXT peripheral.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_start(EXTDriver *extp) {
|
|
unsigned i;
|
|
|
|
if (extp->state == EXT_STOP)
|
|
ext_lld_exti_irq_enable();
|
|
|
|
/* Configuration of automatic channels.*/
|
|
for (i = 0; i < EXT_MAX_CHANNELS; i++)
|
|
if (extp->config->channels[i].mode & EXT_CH_MODE_AUTOSTART)
|
|
ext_lld_channel_enable(extp, i);
|
|
else
|
|
ext_lld_channel_disable(extp, i);
|
|
}
|
|
|
|
/**
|
|
* @brief Deactivates the EXT peripheral.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_stop(EXTDriver *extp) {
|
|
|
|
if (extp->state == EXT_ACTIVE)
|
|
ext_lld_exti_irq_disable();
|
|
|
|
EXTI->EMR = 0;
|
|
EXTI->IMR = 0;
|
|
EXTI->PR = 0xFFFFFFFF;
|
|
#if STM32_EXTI_NUM_CHANNELS > 32
|
|
EXTI->PR2 = 0xFFFFFFFF;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* @brief Enables an EXT channel.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
* @param[in] channel channel to be enabled
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel) {
|
|
|
|
#if STM32_EXTI_NUM_CHANNELS > 32
|
|
if (channel < 32) {
|
|
#endif
|
|
/* Programming edge registers.*/
|
|
if (extp->config->channels[channel].mode & EXT_CH_MODE_RISING_EDGE)
|
|
EXTI->RTSR |= (1 << channel);
|
|
else
|
|
EXTI->RTSR &= ~(1 << channel);
|
|
if (extp->config->channels[channel].mode & EXT_CH_MODE_FALLING_EDGE)
|
|
EXTI->FTSR |= (1 << channel);
|
|
else
|
|
EXTI->FTSR &= ~(1 << channel);
|
|
|
|
/* Programming interrupt and event registers.*/
|
|
if (extp->config->channels[channel].cb != NULL) {
|
|
EXTI->IMR |= (1 << channel);
|
|
EXTI->EMR &= ~(1 << channel);
|
|
}
|
|
else {
|
|
EXTI->EMR |= (1 << channel);
|
|
EXTI->IMR &= ~(1 << channel);
|
|
}
|
|
#if STM32_EXTI_NUM_CHANNELS > 32
|
|
}
|
|
else {
|
|
/* Programming edge registers.*/
|
|
if (extp->config->channels[channel].mode & EXT_CH_MODE_RISING_EDGE)
|
|
EXTI->RTSR2 |= (1 << (32 - channel));
|
|
else
|
|
EXTI->RTSR2 &= ~(1 << (32 - channel));
|
|
if (extp->config->channels[channel].mode & EXT_CH_MODE_FALLING_EDGE)
|
|
EXTI->FTSR2 |= (1 << (32 - channel));
|
|
else
|
|
EXTI->FTSR2 &= ~(1 << (32 - channel));
|
|
|
|
/* Programming interrupt and event registers.*/
|
|
if (extp->config->channels[channel].cb != NULL) {
|
|
EXTI->IMR2 |= (1 << (32 - channel));
|
|
EXTI->EMR2 &= ~(1 << (32 - channel));
|
|
}
|
|
else {
|
|
EXTI->EMR2 |= (1 << (32 - channel));
|
|
EXTI->IMR2 &= ~(1 << (32 - channel));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Setting the associated GPIO for external channels.*/
|
|
if (channel < 16) {
|
|
uint32_t n = channel >> 2;
|
|
uint32_t mask = ~(0xF << ((channel & 3) * 4));
|
|
uint32_t port = ((extp->config->channels[channel].mode &
|
|
EXT_MODE_GPIO_MASK) >>
|
|
EXT_MODE_GPIO_OFF) << ((channel & 3) * 4);
|
|
|
|
#if defined(STM32L1XX_MD) || defined(STM32F0XX) || defined(STM32F2XX) || \
|
|
defined(STM32F30X) || defined(STM32F37X) || defined(STM32F4XX)
|
|
SYSCFG->EXTICR[n] = (SYSCFG->EXTICR[n] & mask) | port;
|
|
#else /* STM32F1XX */
|
|
AFIO->EXTICR[n] = (AFIO->EXTICR[n] & mask) | port;
|
|
#endif /* STM32F1XX */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Disables an EXT channel.
|
|
*
|
|
* @param[in] extp pointer to the @p EXTDriver object
|
|
* @param[in] channel channel to be disabled
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel) {
|
|
|
|
(void)extp;
|
|
|
|
#if STM32_EXTI_NUM_CHANNELS > 32
|
|
if (channel < 32) {
|
|
#endif
|
|
EXTI->IMR &= ~(1 << channel);
|
|
EXTI->EMR &= ~(1 << channel);
|
|
EXTI->RTSR &= ~(1 << channel);
|
|
EXTI->FTSR &= ~(1 << channel);
|
|
EXTI->PR = (1 << channel);
|
|
#if STM32_EXTI_NUM_CHANNELS > 32
|
|
}
|
|
else {
|
|
EXTI->IMR2 &= ~(1 << (32 - channel));
|
|
EXTI->EMR2 &= ~(1 << (32 - channel));
|
|
EXTI->RTSR2 &= ~(1 << (32 - channel));
|
|
EXTI->FTSR2 &= ~(1 << (32 - channel));
|
|
EXTI->PR2 = (1 << (32 - channel));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif /* HAL_USE_EXT */
|
|
|
|
/** @} */
|