[RISC-V MCU 应用开发] 【RISC-V MCU CH32V103测评】+定时器测试

#ifndef __LED_H

#define __LED_H

#include "ch32v10x_conf.h"

void LED_Init(void);  //初始化

#endif

#include "led.h"

void LED_Init(void) 

#ifndef __TIME_H

#define __TIME_H

#include "ch32v10x_conf.h"

void TIM3_Int_Init(u16 arr,u16 psc);

void TIM3_IRQHandler(void);

#endif

#include "time.h"

#include "led.h"

void TIM3_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));

void TIM3_Int_Init(u16 arr,u16 psc)

{

   TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

   NVIC_InitTypeDef NVIC_InitStructure;

   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能TIM3时钟

   TIM_TimeBaseStructure.TIM_Period = arr;   //指定下次更新事件时要加载到活动自动重新加载寄存器中的周期值。

   TIM_TimeBaseStructure.TIM_Prescaler =psc; //指定用于划分TIM时钟的预分频器值。

   TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;     //时钟分频因子

   TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM计数模式，向上计数模式

   TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

   TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能TIM3中断，允许更新中断

   //初始化TIM NVIC，设置中断优先级分组

   NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;           //TIM3中断

   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //设置抢占优先级0

   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;        //设置响应优先级3

   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;           //使能通道1中断

   NVIC_Init(&NVIC_InitStructure); //初始化NVIC

   TIM_Cmd(TIM3, ENABLE); //TIM3使能

}

void TIM3_IRQHandler(void)

{

   static u8 i=0;

   if(TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查TIM3中断是否发生。

   {

       TIM_ClearITPendingBit(TIM3,TIM_IT_Update);    //清除TIM3的中断挂起位。

        printf("Enter interrupt\n");

       <font color="#ff0000"> GPIO_WriteBit(GPIOA, GPIO_Pin_1, (i==0) ? (i=Bit_SET):(i=Bit_RESET));</font>

   }

}

/*  用定时器点亮led（PA1）*/

<font color="#ff0000">#include "debug.h"

#include "led.h"

#include "time.h</font><span style="color: rgb(255, 0, 0);">"</span>

int main(void)

｛

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

    Delay_Init();

    USART_Printf_Init(115200);

    LED_Init();

    TIM3_Int_Init(4999,7199);

    printf("SystemClk:%d\r\n",SystemCoreClock);

    while(1)

  ｛