+++ /dev/null
-/**\r
- ******************************************************************************\r
- * @file stm32l1xx_exti.c\r
- * @author MCD Application Team\r
- * @version V1.0.0\r
- * @date 31-December-2010\r
- * @brief This file provides firmware functions to manage the following \r
- * functionalities of the EXTI peripheral: \r
- * - Initialization and Configuration\r
- * - Interrupts and flags management\r
- *\r
- * @verbatim \r
- * \r
- * ===================================================================\r
- * EXTI features\r
- * ===================================================================\r
- * \r
- * External interrupt/event lines are mapped as following:\r
- * 1- All available GPIO pins are connected to the 16 external \r
- * interrupt/event lines from EXTI0 to EXTI15.\r
- * 2- EXTI line 16 is connected to the PVD output\r
- * 3- EXTI line 17 is connected to the RTC Alarm event\r
- * 4- EXTI line 18 is connected to the USB Device FS wakeup event\r
- * 5- EXTI line 19 is connected to the RTC Tamper and TimeStamp events\r
- * 6- EXTI line 20 is connected to the RTC Wakeup event\r
- * 7- EXTI line 21 is connected to the Comparator 1 wakeup event \r
- * 8- EXTI line 22 is connected to the Comparator 2 wakeup event\r
- *\r
- * ===================================================================\r
- * How to use this driver\r
- * =================================================================== \r
- * \r
- * In order to use an I/O pin as an external interrupt source, follow\r
- * steps below:\r
- * 1- Configure the I/O in input mode using GPIO_Init()\r
- * 2- Select the input source pin for the EXTI line using \r
- * SYSCFG_EXTILineConfig()\r
- * 3- Select the mode(interrupt, event) and configure the trigger \r
- * selection (Rising, falling or both) using EXTI_Init()\r
- * 4- Configure NVIC IRQ channel mapped to the EXTI line using NVIC_Init()\r
- * \r
- *@note SYSCFG APB clock must be enabled to get write access to SYSCFG_EXTICRx\r
- * registers using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);\r
- * \r
- * @endverbatim \r
- *\r
- ******************************************************************************\r
- * @attention\r
- *\r
- * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS\r
- * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE\r
- * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY\r
- * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING\r
- * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE\r
- * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.\r
- *\r
- * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2>\r
- ****************************************************************************** \r
- */ \r
-\r
-/* Includes ------------------------------------------------------------------*/\r
-#include "stm32l1xx_exti.h"\r
-\r
-/** @addtogroup STM32L1xx_StdPeriph_Driver\r
- * @{\r
- */\r
-\r
-/** @defgroup EXTI \r
- * @brief EXTI driver modules\r
- * @{\r
- */\r
-\r
-/* Private typedef -----------------------------------------------------------*/\r
-/* Private define ------------------------------------------------------------*/\r
-#define EXTI_LINENONE ((uint32_t)0x00000) /* No interrupt selected */\r
-\r
-/* Private macro -------------------------------------------------------------*/\r
-/* Private variables ---------------------------------------------------------*/\r
-/* Private function prototypes -----------------------------------------------*/\r
-/* Private functions ---------------------------------------------------------*/\r
-\r
-/** @defgroup EXTI_Private_Functions\r
- * @{\r
- */\r
-\r
-/** @defgroup EXTI_Group1 Initialization and Configuration functions\r
- * @brief Initialization and Configuration functions \r
- *\r
-@verbatim \r
- ===============================================================================\r
- Initialization and Configuration functions\r
- =============================================================================== \r
-\r
-@endverbatim\r
- * @{\r
- */\r
-\r
-/**\r
- * @brief Deinitializes the EXTI peripheral registers to their default reset values.\r
- * @param None\r
- * @retval None\r
- */\r
-void EXTI_DeInit(void)\r
-{\r
- EXTI->IMR = 0x00000000;\r
- EXTI->EMR = 0x00000000;\r
- EXTI->RTSR = 0x00000000; \r
- EXTI->FTSR = 0x00000000; \r
- EXTI->PR = 0x007FFFFF;\r
-}\r
-\r
-/**\r
- * @brief Initializes the EXTI peripheral according to the specified\r
- * parameters in the EXTI_InitStruct.\r
- * EXTI_Line specifies the EXTI line (EXTI0....EXTI22) \r
- * EXTI_Mode specifies which EXTI line is used as interrupt or an event\r
- * EXTI_Trigger selects the trigger. When the trigger occurs, interrupt\r
- * pending bit will be set\r
- * EXTI_LineCmd controls (Enable/Disable) the EXTI line\r
- * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure\r
- * that contains the configuration information for the EXTI peripheral.\r
- * @retval None\r
- */\r
-void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct)\r
-{\r
- uint32_t tmp = 0;\r
-\r
- /* Check the parameters */\r
- assert_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode));\r
- assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger));\r
- assert_param(IS_EXTI_LINE(EXTI_InitStruct->EXTI_Line)); \r
- assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd));\r
-\r
- tmp = (uint32_t)EXTI_BASE;\r
- \r
- if (EXTI_InitStruct->EXTI_LineCmd != DISABLE)\r
- {\r
- /* Clear EXTI line configuration */\r
- EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line;\r
- EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line;\r
- \r
- tmp += EXTI_InitStruct->EXTI_Mode;\r
-\r
- *(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;\r
-\r
- /* Clear Rising Falling edge configuration */\r
- EXTI->RTSR &= ~EXTI_InitStruct->EXTI_Line;\r
- EXTI->FTSR &= ~EXTI_InitStruct->EXTI_Line;\r
- \r
- /* Select the trigger for the selected external interrupts */\r
- if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling)\r
- {\r
- /* Rising Falling edge */\r
- EXTI->RTSR |= EXTI_InitStruct->EXTI_Line;\r
- EXTI->FTSR |= EXTI_InitStruct->EXTI_Line;\r
- }\r
- else\r
- {\r
- tmp = (uint32_t)EXTI_BASE;\r
- tmp += EXTI_InitStruct->EXTI_Trigger;\r
-\r
- *(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;\r
- }\r
- }\r
- else\r
- {\r
- tmp += EXTI_InitStruct->EXTI_Mode;\r
-\r
- /* Disable the selected external lines */\r
- *(__IO uint32_t *) tmp &= ~EXTI_InitStruct->EXTI_Line;\r
- }\r
-}\r
-\r
-/**\r
- * @brief Fills each EXTI_InitStruct member with its reset value.\r
- * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will\r
- * be initialized.\r
- * @retval None\r
- */\r
-void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct)\r
-{\r
- EXTI_InitStruct->EXTI_Line = EXTI_LINENONE;\r
- EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt;\r
- EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Falling;\r
- EXTI_InitStruct->EXTI_LineCmd = DISABLE;\r
-}\r
-\r
-/**\r
- * @brief Generates a Software interrupt on selected EXTI line.\r
- * @param EXTI_Line: specifies the EXTI line on which the software interrupt\r
- * will be generated.\r
- * This parameter can be any combination of EXTI_Linex where x can be (0..22).\r
- * @retval None\r
- */\r
-void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line)\r
-{\r
- /* Check the parameters */\r
- assert_param(IS_EXTI_LINE(EXTI_Line));\r
- \r
- EXTI->SWIER |= EXTI_Line;\r
-}\r
-\r
-/**\r
- * @}\r
- */\r
-\r
-/** @defgroup EXTI_Group2 Interrupts and flags management functions\r
- * @brief Interrupts and flags management functions \r
- *\r
-@verbatim \r
- ===============================================================================\r
- Interrupts and flags management functions\r
- =============================================================================== \r
-\r
-@endverbatim\r
- * @{\r
- */\r
-\r
-/**\r
- * @brief Checks whether the specified EXTI line flag is set or not.\r
- * @param EXTI_Line: specifies the EXTI line flag to check.\r
- * This parameter can be:\r
- * @arg EXTI_Linex: External interrupt line x where x(0..22)\r
- * @retval The new state of EXTI_Line (SET or RESET).\r
- */\r
-FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line)\r
-{\r
- FlagStatus bitstatus = RESET;\r
- /* Check the parameters */\r
- assert_param(IS_GET_EXTI_LINE(EXTI_Line));\r
- \r
- if ((EXTI->PR & EXTI_Line) != (uint32_t)RESET)\r
- {\r
- bitstatus = SET;\r
- }\r
- else\r
- {\r
- bitstatus = RESET;\r
- }\r
- return bitstatus;\r
-}\r
-\r
-/**\r
- * @brief Clears the EXTI\92s line pending flags.\r
- * @param EXTI_Line: specifies the EXTI lines flags to clear.\r
- * This parameter can be any combination of EXTI_Linex where x can be (0..22).\r
- * @retval None\r
- */\r
-void EXTI_ClearFlag(uint32_t EXTI_Line)\r
-{\r
- /* Check the parameters */\r
- assert_param(IS_EXTI_LINE(EXTI_Line));\r
- \r
- EXTI->PR = EXTI_Line;\r
-}\r
-\r
-/**\r
- * @brief Checks whether the specified EXTI line is asserted or not.\r
- * @param EXTI_Line: specifies the EXTI line to check.\r
- * This parameter can be:\r
- * @arg EXTI_Linex: External interrupt line x where x(0..22)\r
- * @retval The new state of EXTI_Line (SET or RESET).\r
- */\r
-ITStatus EXTI_GetITStatus(uint32_t EXTI_Line)\r
-{\r
- ITStatus bitstatus = RESET;\r
- uint32_t enablestatus = 0;\r
- /* Check the parameters */\r
- assert_param(IS_GET_EXTI_LINE(EXTI_Line));\r
- \r
- enablestatus = EXTI->IMR & EXTI_Line;\r
- if (((EXTI->PR & EXTI_Line) != (uint32_t)RESET) && (enablestatus != (uint32_t)RESET))\r
- {\r
- bitstatus = SET;\r
- }\r
- else\r
- {\r
- bitstatus = RESET;\r
- }\r
- return bitstatus;\r
-}\r
-\r
-/**\r
- * @brief Clears the EXTI\92s line pending bits.\r
- * @param EXTI_Line: specifies the EXTI lines to clear.\r
- * This parameter can be any combination of EXTI_Linex where x can be (0..22).\r
- * @retval None\r
- */\r
-void EXTI_ClearITPendingBit(uint32_t EXTI_Line)\r
-{\r
- /* Check the parameters */\r
- assert_param(IS_EXTI_LINE(EXTI_Line));\r
- \r
- EXTI->PR = EXTI_Line;\r
-}\r
-\r
-/**\r
- * @}\r
- */\r
-\r
-/**\r
- * @}\r
- */\r
-\r
-/**\r
- * @}\r
- */\r
-\r
-/**\r
- * @}\r
- */\r
-\r
-/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/\r
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