...请教下PVD不进中断，查询方式可以...
本帖最后由 borrow1988 于 2018-8-31 10:35 编辑...请教大家下，PVD使用中断方式无法进中断，但是查询可以
以下是配置，其中NVCI为1组：NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
void PWR_PVD_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);//使能PWR时钟
NVIC_InitStructure.NVIC_IRQChannel = PVD_IRQn; //使能PVD所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;//抢占优先级1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure);
// EXTI_StructInit(&EXTI_InitStructure);
EXTI_InitStructure.EXTI_Line = EXTI_Line16; //PVD连接到中断线16上
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //使用中断模式
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //电压低于阀值时产生中断
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //使能中断线
EXTI_Init(&EXTI_InitStructure);
PWR_PVDLevelConfig(PWR_PVDLevel_2V5);//设定监控阀值 注意和F1的区别 F1的电压等级就更直观 PWR_PVDLevel_2V8
PWR_PVDCmd(ENABLE);//使能PVD
}
void PVD_IRQHandler(void)
{
printf("\r\n PVD ISR \r\n");
if(EXTI_GetITStatus(PWR_FLAG_PVDO)!=RESET)
{
GPIO_ResetBits(GPIOA,GPIO_Pin_1);
//掉电了
printf("\r\n PVD\r\n");
}
EXTI_ClearITPendingBit(EXTI_Line16);
}
这个不是官方的标准配置吗，测试不行吗
/**
******************************************************************************
* @file PWR/PWR_PVD/main.c
* @authorMCD 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 ---------------------------------------------------------*/
/**
* @briefMain program
* @paramNone
* @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++);
}
}
/**
* @briefConfigures the PVD resources.
* @paramNone
* @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);
}
#ifdefUSE_FULL_ASSERT
/**
* @briefReports the name of the source file and the source line number
* where the assert_param error has occurred.
* @paramfile: pointer to the source file name
* @paramline: 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****/
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). */
/******************************************************************************/
/**
* @briefThis function handles the PVD Output interrupt request.
* @paramNone
* @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);
}
}
eric2013 发表于 2018-8-31 10:56
这个不是官方的标准配置吗，测试不行吗
EXTI_Trigger_Rising_Falling 改为EXTI_Trigger_Falling 不行。。。 eric2013 发表于 2018-8-31 10:56
这个不是官方的标准配置吗，测试不行吗
如果加RTOS 比如UCOS，掉电进不去，是不是因为OS调度时，把中断关了 可能存在有两个问题：
（1）EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //电压低于阀值时产生中断，这个应该理解反了，根据手册中PVD示意图的描述，掉电检测应该用EXTI_Trigger_Rising触发，上电用EXTI_Trigger_Falling。
（2）中断函数里这个EXTI_GetITStatus(PWR_FLAG_PVDO)的值也有讲究，根据参考手册中的寄存器描述
if(PWR_GetFlagStatus(PWR_FLAG_PVDO) == SET) ， PVDO = 1, VDD is lower than the PVD threshold selected with the PLS bits.
if((PWR_GetFlagStatus(PWR_FLAG_PVDO) == RESET)) // PVDO = 0, VDD is higher than the PVD threshold selected with the PLS bits.
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