--- /dev/null
+/**\r
+ ******************************************************************************\r
+ * @file stm32f10x_exti.c\r
+ * @author MCD Application Team\r
+ * @version V3.3.0\r
+ * @date 04/16/2010\r
+ * @brief This file provides all the EXTI firmware functions.\r
+ ******************************************************************************\r
+ * @copy\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
+/* Includes ------------------------------------------------------------------*/\r
+#include "stm32f10x_exti.h"\r
+\r
+/** @addtogroup STM32F10x_StdPeriph_Driver\r
+ * @{\r
+ */\r
+\r
+/** @defgroup EXTI \r
+ * @brief EXTI driver modules\r
+ * @{\r
+ */\r
+\r
+/** @defgroup EXTI_Private_TypesDefinitions\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup EXTI_Private_Defines\r
+ * @{\r
+ */\r
+\r
+#define EXTI_LineNone ((uint32_t)0x00000) /* No interrupt selected */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup EXTI_Private_Macros\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup EXTI_Private_Variables\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup EXTI_Private_FunctionPrototypes\r
+ * @{\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup EXTI_Private_Functions\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 = 0x000FFFFF;\r
+}\r
+\r
+/**\r
+ * @brief Initializes the EXTI peripheral according to the specified\r
+ * parameters in the EXTI_InitStruct.\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.\r
+ * @param EXTI_Line: specifies the EXTI lines to be enabled or disabled.\r
+ * This parameter can be any combination of EXTI_Linex where x can be (0..19).\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
+ * @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..19)\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..19).\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..19)\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..19).\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
+/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/\r
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