/* ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, 2011 Giovanni Di Sirio. This file is part of ChibiOS/RT. ChibiOS/RT is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. ChibiOS/RT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ /** * @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 /** * @brief Mask of the available channels. */ #define EXT_CHANNELS_MASK (EXT_MAX_CHANNELS - 1) /** * @name EXTI configuration helpers * @{ */ /** * @brief EXTI-GPIO association macro. * @details Helper macro to associate a GPIO to each of the Mx EXTI inputs. */ #define EXT_MODE_EXTI(m0, m1, m2, m3, m4, m5, m6, m7, \ m8, m9, m10, m11, m12, m13, m14, m15) \ { \ ((m0) << 0) | ((m1) << 4) | ((m2) << 8) | ((m3) << 12), \ ((m4) << 0) | ((m5) << 4) | ((m6) << 8) | ((m7) << 12), \ ((m8) << 0) | ((m9) << 4) | ((m10) << 8) | ((m11) << 12), \ ((m12) << 0) | ((m13) << 4) | ((m14) << 8) | ((m15) << 12) \ } #define EXT_MODE_GPIOA 0 /**< @brief GPIOA identifier. */ #define EXT_MODE_GPIOB 1 /**< @brief GPIOB identifier. */ #define EXT_MODE_GPIOC 2 /**< @brief GPIOC identifier. */ #define EXT_MODE_GPIOD 3 /**< @brief GPIOD identifier. */ #define EXT_MODE_GPIOE 4 /**< @brief GPIOE identifier. */ #define EXT_MODE_GPIOF 5 /**< @brief GPIOF identifier. */ #define EXT_MODE_GPIOG 6 /**< @brief GPIOG identifier. */ #define EXT_MODE_GPIOH 7 /**< @brief GPIOH identifier. */ #define EXT_MODE_GPIOI 8 /**< @brief GPIOI identifier. */ /** @} */ /*===========================================================================*/ /* Driver pre-compile time settings. */ /*===========================================================================*/ /** * @name Configuration options * @{ */ /** * @brief EXTI0 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI0_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI0_IRQ_PRIORITY 6 #endif /** * @brief EXTI1 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI1_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI1_IRQ_PRIORITY 6 #endif /** * @brief EXTI2 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI2_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI2_IRQ_PRIORITY 6 #endif /** * @brief EXTI3 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI3_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI3_IRQ_PRIORITY 6 #endif /** * @brief EXTI4 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI4_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI4_IRQ_PRIORITY 6 #endif /** * @brief EXTI9..5 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI5_9_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI5_9_IRQ_PRIORITY 6 #endif /** * @brief EXTI15..10 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI10_15_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI10_15_IRQ_PRIORITY 6 #endif /** * @brief EXTI16 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI16_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI16_IRQ_PRIORITY 6 #endif /** * @brief EXTI17 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI17_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI17_IRQ_PRIORITY 6 #endif /** * @brief EXTI18 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI18_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI18_IRQ_PRIORITY 6 #endif /** * @brief EXTI19 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI19_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI19_IRQ_PRIORITY 6 #endif /** * @brief EXTI20 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI20_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI20_IRQ_PRIORITY 6 #endif /** * @brief EXTI21 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI21_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI21_IRQ_PRIORITY 6 #endif /** * @brief EXTI22 interrupt priority level setting. */ #if !defined(STM32_EXT_EXTI22_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_EXT_EXTI22_IRQ_PRIORITY 6 #endif /** @} */ /*===========================================================================*/ /* 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.*/ /** * @brief Initialization values for EXTICRx registers. */ uint16_t exti[4]; } 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_ */ /** @} */