154 lines
5.1 KiB
C
154 lines
5.1 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 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 STM32/ext_lld.h
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* @brief STM32 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 Available number of EXT channels.
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*/
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#define EXT_MAX_CHANNELS STM32_EXTI_NUM_CHANNELS
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/**
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* @name STM32-specific EXT channel modes
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* @{
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*/
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#define EXT_MODE_GPIO_MASK 0xF0 /**< @brief Port field mask. */
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#define EXT_MODE_GPIO_OFF 4 /**< @brief Port field offset. */
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#define EXT_MODE_GPIOA 0x00 /**< @brief GPIOA identifier. */
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#define EXT_MODE_GPIOB 0x10 /**< @brief GPIOB identifier. */
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#define EXT_MODE_GPIOC 0x20 /**< @brief GPIOC identifier. */
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#define EXT_MODE_GPIOD 0x30 /**< @brief GPIOD identifier. */
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#define EXT_MODE_GPIOE 0x40 /**< @brief GPIOE identifier. */
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#define EXT_MODE_GPIOF 0x50 /**< @brief GPIOF identifier. */
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#define EXT_MODE_GPIOG 0x60 /**< @brief GPIOG identifier. */
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#define EXT_MODE_GPIOH 0x70 /**< @brief GPIOH identifier. */
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#define EXT_MODE_GPIOI 0x80 /**< @brief GPIOI identifier. */
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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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} 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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/*===========================================================================*/
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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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#if !defined(__DOXYGEN__)
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extern EXTDriver EXTD1;
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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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