標(biāo)題: stm32配置pwm [打印本頁(yè)]

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作者: yzhwoaini    時(shí)間: 2017-11-24 18:22
標(biāo)題: stm32配置pwm
#include "pwm.h"
#include "led.h"

//void TIM3_Int_Init(u16 arr,u16 psc)
//{
//TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
//NVIC_InitTypeDef NVIC_InitStructure;
//RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //①時(shí)鐘 TIM3 使能
////定時(shí)器 TIM3 初始化
//TIM_TimeBaseStructure.TIM_Period = arr; //設(shè)置自動(dòng)重裝載寄存器周期的值
//TIM_TimeBaseStructure.TIM_Prescaler =psc; //設(shè)置時(shí)鐘頻率除數(shù)的預(yù)分頻值
//TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //設(shè)置時(shí)鐘分割
//TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM 向上計(jì)數(shù)
//    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //②初始化 TIM3
//TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //③允許更新中斷
////中斷優(yōu)先級(jí) NVIC 設(shè)置
//NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3 上升中斷
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占優(yōu)先級(jí) 0 級(jí)
//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //從優(yōu)先級(jí) 3 級(jí)
//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ 通道被使能
//NVIC_Init(&NVIC_InitStructure); //④初始化 NVIC 寄存器
//TIM_Cmd(TIM3, ENABLE); //⑤使能 TIM3
//}
//定時(shí)器 3 中斷服務(wù)程序⑥
//void TIM3_IRQHandler(void) //TIM3 中斷
//{
//if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //檢查 TIM3 更新中斷發(fā)生與否
//{
//TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除 TIM3 更新中斷標(biāo)志
//LED1=!LED1;
//}
//}

void TIM3_PWM_Init(u16 arr,u16 psc)
{

        GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
        TIM_OCInitTypeDef TIM_OCInitSture;
        
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //①使能 TIM3時(shí)鐘
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO,ENABLE);//①使能 GPIO 和 AFIO 復(fù)用功能時(shí)鐘

    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9;//端口配置 led0=PC8 led1=PC9
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;//復(fù)用推挽
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;//
    GPIO_Init(GPIOC,&GPIO_InitStructure);//初始化GPIO

    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
        GPIO_InitStructure.GPIO_Pin= GPIO_Pin_6|GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
        GPIO_Init(GPIOC,&GPIO_InitStructure);
        
        //映射
        
        GPIO_PinRemapConfig( GPIO_FullRemap_TIM3  ,ENABLE);//映射
        
        //定時(shí)器TIM3初始化
        
        TIM_TimeBaseStructure.TIM_Period = arr; //設(shè)置自動(dòng)重裝載寄存器周期的值
    TIM_TimeBaseStructure.TIM_Prescaler =psc; //設(shè)置時(shí)鐘頻率除數(shù)的預(yù)分頻值
    TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1; //設(shè)置時(shí)鐘分割
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM 向上計(jì)數(shù)
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//初始化 TIN3
        
        //初始化TIM3 PWM模式
        TIM_OCInitSture.TIM_OCMode=TIM_OCMode_PWM1;//選擇 PWM 模式 1
        TIM_OCInitSture.TIM_OutputState=TIM_OutputState_Enable;//比較輸出使能
        TIM_OCInitSture.TIM_OCPolarity=TIM_OCPolarity_High;//輸出極性高
        TIM_OC3Init(TIM3,&TIM_OCInitSture);//④初始化外設(shè) TIM3 OC3
        
        TIM_OCInitSture.TIM_OCMode=TIM_OCMode_PWM1;
        TIM_OCInitSture.TIM_OutputState=TIM_OutputState_Enable;
        TIM_OCInitSture.TIM_OCPolarity= TIM_OCPolarity_High;
        TIM_OC4Init(TIM3,&TIM_OCInitSture);//④初始化外設(shè) TIM3 OC4
        
        
        
    TIM_OC3PreloadConfig( TIM3,TIM_OCPreload_Enable);//使能預(yù)裝載寄存器
        TIM_OC4PreloadConfig( TIM3,TIM_OCPreload_Enable);
        TIM_Cmd(TIM3, ENABLE); //⑤使能 TIM3
        
}

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