Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_exti.c

Revision:

125:23cc3068a9e4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_exti.c	Wed Mar 19 10:15:22 2014 +0000
@@ -0,0 +1,359 @@
+/**
+  ******************************************************************************
+  * @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>&copy; 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****/