第七十二章、CH32V103应用教程——PWM输出-8路

#ifndef __PWM_H

#define __PWM_H



#include "ch32v10x_conf.h"



void PWM_GPIO_Configuration(void);

void PWM_TIM_Configuration(void);



#endif

#include "pwm.h"



//PWM输出通道对应GPIO引脚初始化配置

//此处使用TIM1和TIM2，对应通道分别为下：

//TIM2:CH1(PA0) CH2(PA1) CH3(PA2)  CH4(PA3)

//TIM1:CH1(PA8) CH2(PA9) CH3(PA10) CH4(PA11)

void PWM_GPIO_Configuration(void)

{

    GPIO_InitTypeDef GPIO_InitStructure;



    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);    //打开管脚复用AFIO时钟

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);



    //此处PA9引脚既作为USART_TX,又作为TIM1_CH2,需要进行复用操作

    GPIO_PinRemapConfig(GPIO_FullRemap_TIM1,ENABLE);     //更改指定管脚的映射。



    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_8 | GPIO_Pin_9|GPIO_Pin_10 | GPIO_Pin_11;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;      //复用推挽输出

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_Init(GPIOA, &GPIO_InitStructure);



}



//定时器PWM输出配置

void PWM_TIM_Configuration(void)

{

     TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;

     TIM_OCInitTypeDef TIM_OCInitStructure;



     TIM_BaseInitStructure.TIM_Period = 1000-1;

     TIM_BaseInitStructure.TIM_Prescaler = 72-1;

     TIM_BaseInitStructure.TIM_ClockDivision = 0;

     TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;

     TIM_BaseInitStructure.TIM_RepetitionCounter = 0;

     TIM_TimeBaseInit(TIM1, &TIM_BaseInitStructure);



     TIM_ARRPreloadConfig(TIM1, ENABLE);



     TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

     TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

     TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;



     TIM_OCInitStructure.TIM_Pulse = 200;

     TIM_OC1Init(TIM1, &TIM_OCInitStructure);

     TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);



     TIM_OCInitStructure.TIM_Pulse = 400;

     TIM_OC2Init(TIM1, &TIM_OCInitStructure);

     TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);



     TIM_OCInitStructure.TIM_Pulse = 600;

     TIM_OC3Init(TIM1, &TIM_OCInitStructure);

     TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);



     TIM_OCInitStructure.TIM_Pulse = 800;

     TIM_OC4Init(TIM1, &TIM_OCInitStructure);

     TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);



     TIM_BaseInitStructure.TIM_Period = 1000-1;

     TIM_BaseInitStructure.TIM_Prescaler = 72-1;

     TIM_BaseInitStructure.TIM_ClockDivision = 0;

     TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;

     TIM_BaseInitStructure.TIM_RepetitionCounter = 0;

     TIM_TimeBaseInit(TIM2, &TIM_BaseInitStructure);



     TIM_ARRPreloadConfig(TIM2, ENABLE);



     TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

     TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

     TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;



     TIM_OCInitStructure.TIM_Pulse =100;

     TIM_OC1Init(TIM2, &TIM_OCInitStructure);

     TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);



     TIM_OCInitStructure.TIM_Pulse =300;

     TIM_OC2Init(TIM2, &TIM_OCInitStructure);

     TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);



     TIM_OCInitStructure.TIM_Pulse =500;

     TIM_OC3Init(TIM2, &TIM_OCInitStructure);

     TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);



     TIM_OCInitStructure.TIM_Pulse =700;

     TIM_OC4Init(TIM2, &TIM_OCInitStructure);

     TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);



     TIM_Cmd(TIM1, ENABLE);

     TIM_Cmd(TIM2, ENABLE);



     TIM_CtrlPWMOutputs(TIM1, ENABLE);

     TIM_CtrlPWMOutputs(TIM2, ENABLE);





}

int main(void)

{



    Delay_Init();

    //USART_Printf_Init(115200);

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



    PWM_GPIO_Configuration();

    PWM_TIM_Configuration();

    while(1)

    {

        //TIM_SetCompare1(TIM1,500);  //可对占空比进行修改

    }



}