【单片机】CH32V103v8t6 - PA5-外部中断测试程序

main.c文件内容

/*
*@Note
外部中断线例程：
EXTI_Line5(PA5)
PA5设置上拉输入，下降沿触发中断。

*/

#include "debug.h"

/*******************************************************************************
* Function Name : EXTI5_INT_INIT
* Description : Initializes EXTI0 collection.
* Input : None
* Return : None
*******************************************************************************/
void EXTI5_INT_INIT(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* GPIOA ----> EXTI_Line5 */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource5);
EXTI_InitStructure.EXTI_Line=EXTI_Line5;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

/*******************************************************************************
* Function Name : main
* Description : Main program.
* Input : None
* Return : None
*******************************************************************************/
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
Delay_Init();
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n",SystemCoreClock);

printf("EXTI0 Test\r\n");
EXTI5_INT_INIT();

while(1)
{
Delay_Ms(1000);
printf("Run at main\r\n");
}
}

ch32v10x_it.c内容

/********************************** (C) COPYRIGHT *******************************
* File Name          : ch32v10x_it.c
* Author             : WCH
* Version            : V1.0.0
* Date               : 2020/04/30
* Description        : Main Interrupt Service Routines.
*******************************************************************************/
#include "ch32v10x_it.h"

void NMI_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void HardFault_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void EXTI9_5_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));

/*******************************************************************************
* Function Name  : NMI_Handler
* Description    : This function handles NMI exception.
* Input          : None
* Return         : None
*******************************************************************************/
void NMI_Handler(void)
{
}

/*******************************************************************************
* Function Name  : HardFault_Handler
* Description    : This function handles Hard Fault exception.
* Input          : None
* Return         : None
*******************************************************************************/
void HardFault_Handler(void)
{
  while (1)
  {
  }
}

/*******************************************************************************
* Function Name  : EXTI5_IRQHandler
* Description    : This function handles EXTI0 Handler.
* Input          : None
* Return         : None
*******************************************************************************/

void EXTI9_5_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line5)!=RESET)
  {
    printf("Run at EXTI5\r\n");
    EXTI_ClearITPendingBit(EXTI_Line5);     /* Clear Flag */
  }
}

工程文件下载地址：https://download.csdn.net/download/qq_18187161/22441602