Chip is stm32f103C8T6, PVD off electricity detection, interrupt service function is through a serial port to send data, but not to send, don't know is not to enter the interrupt, or enter the interrupt, but the voltage is too low, a serial port to send data failure, a great god see, write for a long time didn't solve the problem, the code is as follows:

 void PVD_Init (void) 
{
SystemInit (); 
EXTI_InitTypeDef EXTI_InitStructure; 
RCC_APB1PeriphClockCmd (RCC_APB1Periph_PWR, ENABLE);//PWRe1? U 

/* 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 (& amp; EXTI_InitStructure); 
} 

Void PVD_NVIC (void) 
{
NVIC_InitTypeDef NVIC_InitStructure; 

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

/* the 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 (& amp; NVIC_InitStructure); 
} 

Void PVD_IRQHandler (void) 
{
If (EXTI_GetITStatus (EXTI_Line16)!=RESET) 
{
GPIO_SetBits (GPIOA, GPIO_Pin_1); 
Start ().//a serial port to send data 
EXTI_ClearITPendingBit (EXTI_Line16); 
} 
} 

Int main () 
{
. 

PWR_PVDLevelConfig (PWR_PVDLevel_2V9); 
PWR_PVDCmd (ENABLE); 

PVD_Init (); 
PVD_NVIC (); 

. 
While (1) 
{
; 
} 
} 

CodePudding user response:

The use of leds in instructions

CodePudding user response:

Not ah, tried

CodePudding user response:

The corresponding clock open