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发表于 2018-8-31 10:56:20
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显示全部楼层
这个不是官方的标准配置吗,测试不行吗
- /**
- ******************************************************************************
- * @file PWR/PWR_PVD/main.c
- * @author MCD Application Team
- * @version V1.7.0
- * @date 22-April-2016
- * @brief Main program body
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT 2016 STMicroelectronics</center></h2>
- *
- * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
- * You may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.st.com/software_license_agreement_liberty_v2
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- ******************************************************************************
- */
- /* Includes ------------------------------------------------------------------*/
- #include "main.h"
- /** @addtogroup STM32F4xx_StdPeriph_Examples
- * @{
- */
- /** @addtogroup PWR_PVD
- * @{
- */
- /* Private typedef -----------------------------------------------------------*/
- /* Private define ------------------------------------------------------------*/
- /* Private macro -------------------------------------------------------------*/
- /* Private variables ---------------------------------------------------------*/
- __IO uint32_t uwCounter = 0;
- /* Private function prototypes -----------------------------------------------*/
- void PVD_Config(void);
- /* Private functions ---------------------------------------------------------*/
- /**
- * @brief Main program
- * @param None
- * @retval None
- */
- int main(void)
- {
- /*!< At this stage the microcontroller clock setting is already configured,
- this is done through SystemInit() function which is called from startup
- files (startup_stm32f40_41xxx.s/startup_stm32f427_437xx.s)
- before to branch to application main.
- To reconfigure the default setting of SystemInit() function, refer to
- system_stm32f4xx.c file
- */
-
- /* Initialize LEDs on EVAL board */
- STM_EVAL_LEDInit(LED1);
- STM_EVAL_LEDInit(LED2);
-
- /* Configure the PVD */
- PVD_Config();
-
- while (1)
- {
- /* Toggle LED2 */
- STM_EVAL_LEDToggle(LED2);
- /* Inserted Delay */
- for(uwCounter = 0; uwCounter < 0x5FFFF; uwCounter++);
- }
- }
- /**
- * @brief Configures the PVD resources.
- * @param None
- * @retval None
- */
- void PVD_Config(void)
- {
- NVIC_InitTypeDef NVIC_InitStructure;
- EXTI_InitTypeDef EXTI_InitStructure;
- /* Enable PWR clock */
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
- /* Configure one bit for preemption priority */
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
-
- /* Enable the PVD Interrupt */
- NVIC_InitStructure.NVIC_IRQChannel = PVD_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
-
- /* Configure EXTI Line16(PVD Output) to generate an interrupt on rising and
- falling edges */
- EXTI_ClearITPendingBit(EXTI_Line16);
- EXTI_InitStructure.EXTI_Line = EXTI_Line16;
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
- EXTI_InitStructure.EXTI_LineCmd = ENABLE;
- EXTI_Init(&EXTI_InitStructure);
- /* Configure the PVD Level to 3 (PVD detection level set to 2.5V, refer to the
- electrical characteristics of you device datasheet for more details) */
- PWR_PVDLevelConfig(PWR_PVDLevel_3);
- /* Enable the PVD Output */
- PWR_PVDCmd(ENABLE);
- }
- #ifdef USE_FULL_ASSERT
- /**
- * @brief Reports the name of the source file and the source line number
- * where the assert_param error has occurred.
- * @param file: pointer to the source file name
- * @param line: assert_param error line source number
- * @retval None
- */
- void assert_failed(uint8_t* file, uint32_t line)
- {
- /* User can add his own implementation to report the file name and line number,
- ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
- /* Infinite loop */
- while (1)
- {
- }
- }
- #endif
- /**
- * @}
- */
- /**
- * @}
- */
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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中断:
- /******************************************************************************/
- /* STM32F4xx Peripherals Interrupt Handlers */
- /* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */
- /* available peripheral interrupt handler's name please refer to the startup */
- /* file (startup_stm32f40xx.s.startup_stm32f427x.s). */
- /******************************************************************************/
-
- /**
- * @brief This function handles the PVD Output interrupt request.
- * @param None
- * @retval None
- */
- void PVD_IRQHandler(void)
- {
- if(EXTI_GetITStatus(EXTI_Line16) != RESET)
- {
- /* Toggle LED1 */
- STM_EVAL_LEDToggle(LED1);
- /* Clear the Key Button EXTI line pending bit */
- EXTI_ClearITPendingBit(EXTI_Line16);
- }
- }
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