如何使用STM32的PVD对电源的电压进行监控

O_InitStructure.O_Speed = O_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT_PP;

GPIO_Init(GPIOB, &GPIO_InitStructure); //GPIO B

}

/*******************************************************************

* Function Name : EXTI_Configuration

* Description : Configures .

* Input : None

* Output : None

* Return : None

********************************************************************/

void EXTI_Configuration(void)

{

EXTI_InitTypeDef EXTI_InitStructure;

EXTI_DeInit();

EXTI_StructInit(&EXTI_InitStructure);

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 EXTI Line16 to generate an interrupt

}

/***************************************************************************

* Function Name : NVIC_Configuration

* Description : Configures Vector Table base location.

* Input : None

* Output : None

* Return : None

**************************************************************************/

void NVIC_Configuration(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

#ifdef VECT_TAB_RAM

/* Set the Vector Table base location at 0x20000000 */

NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);

#else /* VECT_TAB_FLASH */

/* Set the Vector Table base location at 0x08000000 */

NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);

#endif

STM32 中文应用文档

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); // Configure one bit for preemption priority

NVIC_InitStructure.NVIC_IRQChannel = PVD_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure); // Enable the PVD Interrupt

}

中断程序：

/**************************************************************************

* Function Name : PVD_IRQHandler

* Description : This function handles PVD interrupt request.

* Input : None

* Output : None

* Return : None

***************************************************************************/

void PVD_IRQHandler(void)

{

if (PWR_GetFlagStatus(PWR_FLAG_PVDO))

GPIO_WriteBit(GPIOB, 1 < 5, Bit_SET);

else

GPIO_WriteBit(GPIOB, 1 < 5, Bit_RESET);

}

注：在void EXTI_Configuration(void)中，对于EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; 中的初始化值，根据你的需要进行修改，具体细节如下：

EXTI_Trigger_Rising --- 表示电压从高电压下降到低于设定的电压阀值产生中断；

EXTI_Trigger_Falling --- 表示电压从低电压上升到高于设定的电压阀值产生中断；

EXTI_Trigger_Rising_Falling --- 表示电压从高电压下降到低于设定的电压阀值、或从低电压上升到高于设定的电压阀值产生中断。