STM32F0xx Standard Peripherals Firmware Library: stm32f0xx_it.c Source File

00001 /**
00002   ******************************************************************************
00003   * @file    COMP/COMP_PulseWidthMeasurement/stm32f0xx_it.c 
00004   * @author  MCD Application Team
00005   * @version V1.4.0
00006   * @date    24-July-2014
00007   * @brief   Main Interrupt Service Routines.
00008   *          This file provides template for all exceptions handler and 
00009   *          peripherals interrupt service routine.
00010   ******************************************************************************
00011   * @attention
00012   *
00013   * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
00014   *
00015   * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
00016   * You may not use this file except in compliance with the License.
00017   * You may obtain a copy of the License at:
00018   *
00019   *        http://www.st.com/software_license_agreement_liberty_v2
00020   *
00021   * Unless required by applicable law or agreed to in writing, software 
00022   * distributed under the License is distributed on an "AS IS" BASIS, 
00023   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00024   * See the License for the specific language governing permissions and
00025   * limitations under the License.
00026   *
00027   ******************************************************************************
00028   */
00029 
00030 /* Includes ------------------------------------------------------------------*/
00031 #include "stm32f0xx_it.h"
00032 
00033 /** @addtogroup STM32F0xx_StdPeriph_Examples
00034   * @{
00035   */
00036 
00037 /** @addtogroup COMP_PulseWidthMeasurement
00038   * @{
00039   */
00040 
00041 /* Private typedef -----------------------------------------------------------*/
00042 /* Private define ------------------------------------------------------------*/
00043 /* Private macro -------------------------------------------------------------*/
00044 /* Private variables ---------------------------------------------------------*/
00045 extern __IO uint32_t Capture;
00046 extern __IO uint32_t DisplayActive;
00047 uint32_t CaptureCounter = 0;
00048 uint16_t IC4Value1 = 0;
00049 uint16_t IC4Value2 = 0;
00050 
00051 /* Private function prototypes -----------------------------------------------*/
00052 /* Private functions ---------------------------------------------------------*/
00053 
00054 /******************************************************************************/
00055 /*            Cortex-M0 Processor Exceptions Handlers                         */
00056 /******************************************************************************/
00057 
00058 /**
00059   * @brief  This function handles NMI exception.
00060   * @param  None
00061   * @retval None
00062   */
00063 void NMI_Handler(void)
00064 {
00065 }
00066 
00067 /**
00068   * @brief  This function handles Hard Fault exception.
00069   * @param  None
00070   * @retval None
00071   */
00072 void HardFault_Handler(void)
00073 {
00074   /* Go to infinite loop when Hard Fault exception occurs */
00075   while (1)
00076   {
00077   }
00078 }
00079 
00080 /**
00081   * @brief  This function handles SVCall exception.
00082   * @param  None
00083   * @retval None
00084   */
00085 void SVC_Handler(void)
00086 {
00087 }
00088 
00089 /**
00090   * @brief  This function handles PendSVC exception.
00091   * @param  None
00092   * @retval None
00093   */
00094 void PendSV_Handler(void)
00095 {
00096 }
00097 
00098 /**
00099   * @brief  This function handles SysTick Handler.
00100   * @param  None
00101   * @retval None
00102   */
00103 void SysTick_Handler(void)
00104 {
00105 }
00106 
00107 /******************************************************************************/
00108 /*                 STM32F0xx Peripherals Interrupt Handlers                   */
00109 /******************************************************************************/
00110 /**
00111   * @brief  This function handles TIM2 global interrupt.
00112   * @param  None
00113   * @retval None
00114   */
00115 void TIM2_IRQHandler(void)
00116 {
00117   
00118   if (TIM_GetITStatus(TIM2, TIM_IT_CC4) == SET)
00119   {
00120     if (CaptureCounter == 0)
00121     {
00122       IC4Value1 = TIM_GetCapture4(TIM2);
00123       CaptureCounter = 1;
00124     }
00125     else if (CaptureCounter == 1)
00126     {
00127       CaptureCounter = 0;
00128       IC4Value2 = TIM_GetCapture4(TIM2);
00129 
00130       if (IC4Value2 > IC4Value1)
00131       {
00132         Capture = (IC4Value2 - IC4Value1) - 1;
00133       }
00134       else
00135       {
00136         Capture = ((0xFFFF - IC4Value1) + IC4Value2) - 1;
00137       }
00138       DisplayActive = 1;
00139     }
00140     TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);
00141   }
00142 }
00143 
00144 
00145 /******************************************************************************/
00146 /*                 STM32F0xx Peripherals Interrupt Handlers                   */
00147 /*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  */
00148 /*  available peripheral interrupt handler's name please refer to the startup */
00149 /*  file (startup_stm32f0xx.s).                                               */
00150 /******************************************************************************/
00151 
00152 /**
00153   * @brief  This function handles PPP interrupt request.
00154   * @param  None
00155   * @retval None
00156   */
00157 /*void PPP_IRQHandler(void)
00158 {
00159 }*/
00160 
00161 /**
00162   * @}
00163   */
00164 
00165 /**
00166   * @}
00167   */
00168 
00169 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/