diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_exti.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_exti.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/stm32lib/src/stm32f10x_exti.c b/stm32lib/src/stm32f10x_exti.c new file mode 100644 index 0000000..021a051 --- /dev/null +++ b/stm32lib/src/stm32f10x_exti.c @@ -0,0 +1,219 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : stm32f10x_exti.c
+* Author : MCD Application Team
+* Version : V2.0.2
+* Date : 07/11/2008
+* Description : This file provides all the EXTI firmware functions.
+********************************************************************************
+* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
+* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
+* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
+* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
+* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+*******************************************************************************/
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x_exti.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#define EXTI_LineNone ((u32)0x00000) /* No interrupt selected */
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name : EXTI_DeInit
+* Description : Deinitializes the EXTI peripheral registers to their default
+* reset values.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void EXTI_DeInit(void)
+{
+ EXTI->IMR = 0x00000000;
+ EXTI->EMR = 0x00000000;
+ EXTI->RTSR = 0x00000000;
+ EXTI->FTSR = 0x00000000;
+ EXTI->PR = 0x0007FFFF;
+}
+
+/*******************************************************************************
+* Function Name : EXTI_Init
+* Description : Initializes the EXTI peripheral according to the specified
+* parameters in the EXTI_InitStruct.
+* Input : - EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure
+* that contains the configuration information for the EXTI
+* peripheral.
+* Output : None
+* Return : None
+*******************************************************************************/
+void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct)
+{
+ /* 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(EXTI_InitStruct->EXTI_Line));
+ assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd));
+
+ if (EXTI_InitStruct->EXTI_LineCmd != DISABLE)
+ {
+ /* Clear EXTI line configuration */
+ EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line;
+ EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line;
+
+ *(vu32 *)(EXTI_BASE + (u32)EXTI_InitStruct->EXTI_Mode)|= EXTI_InitStruct->EXTI_Line;
+
+ /* Clear Rising Falling edge configuration */
+ EXTI->RTSR &= ~EXTI_InitStruct->EXTI_Line;
+ EXTI->FTSR &= ~EXTI_InitStruct->EXTI_Line;
+
+ /* Select the trigger for the selected external interrupts */
+ if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling)
+ {
+ /* Rising Falling edge */
+ EXTI->RTSR |= EXTI_InitStruct->EXTI_Line;
+ EXTI->FTSR |= EXTI_InitStruct->EXTI_Line;
+ }
+ else
+ {
+ *(vu32 *)(EXTI_BASE + (u32)EXTI_InitStruct->EXTI_Trigger)|= EXTI_InitStruct->EXTI_Line;
+ }
+ }
+ else
+ {
+ /* Disable the selected external lines */
+ *(vu32 *)(EXTI_BASE + (u32)EXTI_InitStruct->EXTI_Mode)&= ~EXTI_InitStruct->EXTI_Line;
+ }
+}
+
+/*******************************************************************************
+* Function Name : EXTI_StructInit
+* Description : Fills each EXTI_InitStruct member with its reset value.
+* Input : - EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure
+* which will be initialized.
+* Output : None
+* Return : 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_Falling;
+ EXTI_InitStruct->EXTI_LineCmd = DISABLE;
+}
+
+/*******************************************************************************
+* Function Name : EXTI_GenerateSWInterrupt
+* Description : Generates a Software interrupt.
+* Input : - EXTI_Line: specifies the EXTI lines to be enabled or
+* disabled.
+* This parameter can be any combination of EXTI_Linex where
+* x can be (0..18).
+* Output : None
+* Return : None
+*******************************************************************************/
+void EXTI_GenerateSWInterrupt(u32 EXTI_Line)
+{
+ /* Check the parameters */
+ assert_param(IS_EXTI_LINE(EXTI_Line));
+
+ EXTI->SWIER |= EXTI_Line;
+}
+
+/*******************************************************************************
+* Function Name : EXTI_GetFlagStatus
+* Description : Checks whether the specified EXTI line flag is set or not.
+* Input : - EXTI_Line: specifies the EXTI line flag to check.
+* This parameter can be:
+* - EXTI_Linex: External interrupt line x where x(0..18)
+* Output : None
+* Return : The new state of EXTI_Line (SET or RESET).
+*******************************************************************************/
+FlagStatus EXTI_GetFlagStatus(u32 EXTI_Line)
+{
+ FlagStatus bitstatus = RESET;
+
+ /* Check the parameters */
+ assert_param(IS_GET_EXTI_LINE(EXTI_Line));
+
+ if ((EXTI->PR & EXTI_Line) != (u32)RESET)
+ {
+ bitstatus = SET;
+ }
+ else
+ {
+ bitstatus = RESET;
+ }
+ return bitstatus;
+}
+
+/*******************************************************************************
+* Function Name : EXTI_ClearFlag
+* Description : Clears the EXTI’s line pending flags.
+* Input : - EXTI_Line: specifies the EXTI lines flags to clear.
+* This parameter can be any combination of EXTI_Linex where
+* x can be (0..18).
+* Output : None
+* Return : None
+*******************************************************************************/
+void EXTI_ClearFlag(u32 EXTI_Line)
+{
+ /* Check the parameters */
+ assert_param(IS_EXTI_LINE(EXTI_Line));
+
+ EXTI->PR = EXTI_Line;
+}
+
+/*******************************************************************************
+* Function Name : EXTI_GetITStatus
+* Description : Checks whether the specified EXTI line is asserted or not.
+* Input : - EXTI_Line: specifies the EXTI line to check.
+* This parameter can be:
+* - EXTI_Linex: External interrupt line x where x(0..18)
+* Output : None
+* Return : The new state of EXTI_Line (SET or RESET).
+*******************************************************************************/
+ITStatus EXTI_GetITStatus(u32 EXTI_Line)
+{
+ ITStatus bitstatus = RESET;
+ u32 enablestatus = 0;
+
+ /* Check the parameters */
+ assert_param(IS_GET_EXTI_LINE(EXTI_Line));
+
+ enablestatus = EXTI->IMR & EXTI_Line;
+
+ if (((EXTI->PR & EXTI_Line) != (u32)RESET) && (enablestatus != (u32)RESET))
+ {
+ bitstatus = SET;
+ }
+ else
+ {
+ bitstatus = RESET;
+ }
+ return bitstatus;
+}
+
+/*******************************************************************************
+* Function Name : EXTI_ClearITPendingBit
+* Description : Clears the EXTI’s line pending bits.
+* Input : - EXTI_Line: specifies the EXTI lines to clear.
+* This parameter can be any combination of EXTI_Linex where
+* x can be (0..18).
+* Output : None
+* Return : None
+*******************************************************************************/
+void EXTI_ClearITPendingBit(u32 EXTI_Line)
+{
+ /* Check the parameters */
+ assert_param(IS_EXTI_LINE(EXTI_Line));
+
+ EXTI->PR = EXTI_Line;
+}
+
+/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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