mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
targets/cmsis/TARGET_STM/TARGET_DISCO_F303VC/stm32f30x_exti.c
- Committer:
- janekm
- Date:
- 2014-09-16
- Revision:
- 310:6188e0254baa
- Parent:
- 157:90e3acc479a2
File content as of revision 310:6188e0254baa:
/** ****************************************************************************** * @file stm32f30x_exti.c * @author MCD Application Team * @version V1.1.0 * @date 27-February-2014 * @brief This file provides firmware functions to manage the following * functionalities of the EXTI peripheral: * + Initialization and Configuration * + Interrupts and flags management * @verbatim =============================================================================== ##### EXTI features ##### =============================================================================== [..] External interrupt/event lines are mapped as following: (#) All available GPIO pins are connected to the 16 external interrupt/event lines from EXTI0 to EXTI15. (#) EXTI line 16 is connected to the PVD output (#) EXTI line 17 is connected to the RTC Alarm event (#) EXTI line 18 is connected to USB Device wakeup event (#) EXTI line 19 is connected to the RTC Tamper and TimeStamp events (#) EXTI line 20 is connected to the RTC wakeup event (#) EXTI line 21 is connected to the Comparator 1 wakeup event (#) EXTI line 22 is connected to the Comparator 2 wakeup event (#) EXTI line 23 is connected to the I2C1 wakeup event (#) EXTI line 24 is connected to the I2C2 wakeup event (#) EXTI line 25 is connected to the USART1 wakeup event (#) EXTI line 26 is connected to the USART2 wakeup event (#) EXTI line 27 is reserved (#) EXTI line 28 is connected to the USART3 wakeup event (#) EXTI line 29 is connected to the Comparator 3 event (#) EXTI line 30 is connected to the Comparator 4 event (#) EXTI line 31 is connected to the Comparator 5 event (#) EXTI line 32 is connected to the Comparator 6 event (#) EXTI line 33 is connected to the Comparator 7 event (#) EXTI line 34 is connected for thr UART4 wakeup event (#) EXTI line 35 is connected for the UART5 wakeup event ##### How to use this driver ##### =============================================================================== [..] In order to use an I/O pin as an external interrupt source, follow steps below: (#) Configure the I/O in input mode using GPIO_Init(). (#) Select the input source pin for the EXTI line using SYSCFG_EXTILineConfig(). (#) Select the mode(interrupt, event) and configure the trigger selection (Rising, falling or both) using EXTI_Init(). For the internal interrupt, the trigger selection is not needed (the active edge is always the rising one). (#) Configure NVIC IRQ channel mapped to the EXTI line using NVIC_Init(). (#) Optionally, you can generate a software interrupt using the function EXTI_GenerateSWInterrupt(). [..] (@) SYSCFG APB clock must be enabled to get write access to SYSCFG_EXTICRx registers using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); @endverbatim ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2> * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f30x_exti.h" /** @addtogroup STM32F30x_StdPeriph_Driver * @{ */ /** @defgroup EXTI * @brief EXTI driver modules * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define EXTI_LINENONE ((uint32_t)0x00000) /* No interrupt selected */ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /** @defgroup EXTI_Private_Functions * @{ */ /** @defgroup EXTI_Group1 Initialization and Configuration functions * @brief Initialization and Configuration functions * @verbatim =============================================================================== ##### Initialization and Configuration functions ##### =============================================================================== @endverbatim * @{ */ /** * @brief Deinitializes the EXTI peripheral registers to their default reset * values. * @param None * @retval None */ void EXTI_DeInit(void) { EXTI->IMR = 0x1F800000; EXTI->EMR = 0x00000000; EXTI->RTSR = 0x00000000; EXTI->FTSR = 0x00000000; EXTI->SWIER = 0x00000000; EXTI->PR = 0xE07FFFFF; EXTI->IMR2 = 0x0000000C; EXTI->EMR2 = 0x00000000; EXTI->RTSR2 = 0x00000000; EXTI->FTSR2 = 0x00000000; EXTI->SWIER2 = 0x00000000; EXTI->PR2 = 0x00000003; } /** * @brief Initializes the EXTI peripheral according to the specified * parameters in the EXTI_InitStruct. * EXTI_Line specifies the EXTI line (EXTI0....EXTI35). * EXTI_Mode specifies which EXTI line is used as interrupt or an event. * EXTI_Trigger selects the trigger. When the trigger occurs, interrupt * pending bit will be set. * EXTI_LineCmd controls (Enable/Disable) the EXTI line. * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure that * contains the configuration information for the EXTI peripheral. * @retval None */ void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct) { uint32_t tmp = 0; /* Check the parameters */ assert_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode)); assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger)); assert_param(IS_EXTI_LINE_ALL(EXTI_InitStruct->EXTI_Line)); assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd)); tmp = (uint32_t)EXTI_BASE; if (EXTI_InitStruct->EXTI_LineCmd != DISABLE) { /* Clear EXTI line configuration */ *(__IO uint32_t *) (((uint32_t) &(EXTI->IMR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); *(__IO uint32_t *) (((uint32_t) &(EXTI->EMR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); tmp += EXTI_InitStruct->EXTI_Mode + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20); *(__IO uint32_t *) tmp |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); tmp = (uint32_t)EXTI_BASE; /* Clear Rising Falling edge configuration */ *(__IO uint32_t *) (((uint32_t) &(EXTI->RTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); *(__IO uint32_t *) (((uint32_t) &(EXTI->FTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); /* Select the trigger for the selected interrupts */ if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling) { /* Rising Falling edge */ *(__IO uint32_t *) (((uint32_t) &(EXTI->RTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); *(__IO uint32_t *) (((uint32_t) &(EXTI->FTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); } else { tmp += EXTI_InitStruct->EXTI_Trigger + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20); *(__IO uint32_t *) tmp |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); } } else { tmp += EXTI_InitStruct->EXTI_Mode + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20); /* Disable the selected external lines */ *(__IO uint32_t *) tmp &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F)); } } /** * @brief Fills each EXTI_InitStruct member with its reset value. * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will * be initialized. * @retval None */ void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct) { EXTI_InitStruct->EXTI_Line = EXTI_LINENONE; EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Rising_Falling; EXTI_InitStruct->EXTI_LineCmd = DISABLE; } /** * @brief Generates a Software interrupt on selected EXTI line. * @param EXTI_Line: specifies the EXTI line on which the software interrupt * will be generated. * This parameter can be any combination of EXTI_Linex where x can be (0..20). * @retval None */ void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line) { /* Check the parameters */ assert_param(IS_EXTI_LINE_EXT(EXTI_Line)); *(__IO uint32_t *) (((uint32_t) &(EXTI->SWIER)) + ((EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_Line & 0x1F)); } /** * @} */ /** @defgroup EXTI_Group2 Interrupts and flags management functions * @brief EXTI Interrupts and flags management functions * @verbatim =============================================================================== ##### Interrupts and flags management functions ##### =============================================================================== [..] This section provides functions allowing to configure the EXTI Interrupts sources and check or clear the flags or pending bits status. @endverbatim * @{ */ /** * @brief Checks whether the specified EXTI line flag is set or not. * @param EXTI_Line: specifies the EXTI line flag to check. * This parameter can be any combination of EXTI_Linex where x can be (0..20). * @retval The new state of EXTI_Line (SET or RESET). */ FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line) { FlagStatus bitstatus = RESET; /* Check the parameters */ assert_param(IS_GET_EXTI_LINE(EXTI_Line)); if ((*(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20)& (uint32_t)(1 << (EXTI_Line & 0x1F))) != (uint32_t)RESET) { bitstatus = SET; } else { bitstatus = RESET; } return bitstatus; } /** * @brief Clears the EXTI's line pending flags. * @param EXTI_Line: specifies the EXTI lines flags to clear. * This parameter can be any combination of EXTI_Linex where x can be (0..20). * @retval None */ void EXTI_ClearFlag(uint32_t EXTI_Line) { /* Check the parameters */ assert_param(IS_EXTI_LINE_EXT(EXTI_Line)); *(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20) = (1 << (EXTI_Line & 0x1F)); } /** * @brief Checks whether the specified EXTI line is asserted or not. * @param EXTI_Line: specifies the EXTI line to check. * This parameter can be any combination of EXTI_Linex where x can be (0..20). * @retval The new state of EXTI_Line (SET or RESET). */ ITStatus EXTI_GetITStatus(uint32_t EXTI_Line) { ITStatus bitstatus = RESET; /* Check the parameters */ assert_param(IS_GET_EXTI_LINE(EXTI_Line)); if ((*(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20)& (uint32_t)(1 << (EXTI_Line & 0x1F))) != (uint32_t)RESET) { bitstatus = SET; } else { bitstatus = RESET; } return bitstatus; } /** * @brief Clears the EXTI's line pending bits. * @param EXTI_Line: specifies the EXTI lines to clear. * This parameter can be any combination of EXTI_Linex where x can be (0..20). * @retval None */ void EXTI_ClearITPendingBit(uint32_t EXTI_Line) { /* Check the parameters */ assert_param(IS_EXTI_LINE_EXT(EXTI_Line)); *(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20) = (1 << (EXTI_Line & 0x1F)); } /** * @} */ /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/