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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8120 35acf78f-673a-0410-8e92-d51de3d6d3f4

master
Giovanni Di Sirio 2015-07-28 11:47:01 +00:00
parent 60faa453fd
commit 402bd03481
2 changed files with 0 additions and 372 deletions
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219
os/hal/ports/STM32/LLD/ext_lld.c
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/*
ChibiOS - Copyright (C) 2006..2015 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 "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) {
/* 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(STM32F1XX)
AFIO->EXTICR[n] = (AFIO->EXTICR[n] & mask) | port;
#else /* !defined(STM32F1XX) */
SYSCFG->EXTICR[n] = (SYSCFG->EXTICR[n] & mask) | port;
#endif /* !defined(STM32F1XX) */
}
#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
}
/**
* @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 */
/** @} */

153
os/hal/ports/STM32/LLD/ext_lld.h
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/*
ChibiOS - Copyright (C) 2006..2015 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.h
* @brief STM32 EXT subsystem low level driver header.
*
* @addtogroup EXT
* @{
*/
#ifndef _EXT_LLD_H_
#define _EXT_LLD_H_
#if HAL_USE_EXT || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @brief Available number of EXT channels.
*/
#define EXT_MAX_CHANNELS STM32_EXTI_NUM_CHANNELS
/**
* @name STM32-specific EXT channel modes
* @{
*/
#define EXT_MODE_GPIO_MASK 0xF0 /**< @brief Port field mask. */
#define EXT_MODE_GPIO_OFF 4 /**< @brief Port field offset. */
#define EXT_MODE_GPIOA 0x00 /**< @brief GPIOA identifier. */
#define EXT_MODE_GPIOB 0x10 /**< @brief GPIOB identifier. */
#define EXT_MODE_GPIOC 0x20 /**< @brief GPIOC identifier. */
#define EXT_MODE_GPIOD 0x30 /**< @brief GPIOD identifier. */
#define EXT_MODE_GPIOE 0x40 /**< @brief GPIOE identifier. */
#define EXT_MODE_GPIOF 0x50 /**< @brief GPIOF identifier. */
#define EXT_MODE_GPIOG 0x60 /**< @brief GPIOG identifier. */
#define EXT_MODE_GPIOH 0x70 /**< @brief GPIOH identifier. */
#define EXT_MODE_GPIOI 0x80 /**< @brief GPIOI identifier. */
/** @} */
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief EXT channel identifier.
*/
typedef uint32_t expchannel_t;
/**
* @brief Type of an EXT generic notification callback.
*
* @param[in] extp pointer to the @p EXPDriver object triggering the
* callback
*/
typedef void (*extcallback_t)(EXTDriver *extp, expchannel_t channel);
/**
* @brief Channel configuration structure.
*/
typedef struct {
/**
* @brief Channel mode.
*/
uint32_t mode;
/**
* @brief Channel callback.
* @details In the STM32 implementation a @p NULL callback pointer is
* valid and configures the channel as an event sources instead
* of an interrupt source.
*/
extcallback_t cb;
} EXTChannelConfig;
/**
* @brief Driver configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct {
/**
* @brief Channel configurations.
*/
EXTChannelConfig channels[EXT_MAX_CHANNELS];
/* End of the mandatory fields.*/
} EXTConfig;
/**
* @brief Structure representing an EXT driver.
*/
struct EXTDriver {
/**
* @brief Driver state.
*/
extstate_t state;
/**
* @brief Current configuration data.
*/
const EXTConfig *config;
/* End of the mandatory fields.*/
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if !defined(__DOXYGEN__)
extern EXTDriver EXTD1;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void ext_lld_init(void);
void ext_lld_start(EXTDriver *extp);
void ext_lld_stop(EXTDriver *extp);
void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel);
void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_EXT */
#endif /* _EXT_LLD_H_ */
/** @} */