STM32--4路PWM

TIM3输出4路PWM

void TIM3_INIT_PWM(u16 arr,u16 psc)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;
    

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);    //使能定时器3时钟
     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA| RCC_APB2Periph_GPIOB  | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
    
    //GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE); //Timer3部分重映射  TIM3_CH2->PB5    
 
    
   //TIM3 CH1的PWM脉冲波形    GPIOA.6
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //TIM_CH2
    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);//初始化GPIO
    
     //TIM3 CH2的PWM脉冲波形    GPIOA.7
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //TIM_CH2
    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);//初始化GPIO
    
    
     //TIM3 CH3的PWM脉冲波形    GPIOB.0
     
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //TIM_CH3
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO
    
     //TIM3 CH4的PWM脉冲波形    GPIOB.1
         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //TIM_CH4
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO
    
    
  //初始化TIM3
    TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
    TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 
    TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
    
    //初始化TIM3 Channel2 PWM模式     
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式2
     TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
    
    //初始化CH1
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC2
    //初始化CH2
    TIM_OC2Init(TIM3, &TIM_OCInitStructure);
    //初始化CH3
    TIM_OC3Init(TIM3, &TIM_OCInitStructure);  
    //初始化CH4
    TIM_OC4Init(TIM3, &TIM_OCInitStructure);  
    

    
    TIM_CtrlPWMOutputs(TIM3,ENABLE);    //MOE 主输出使能    
    
        
    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);//CH3预装载使能
    TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);//CH3预装载使能
    TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);  //
    TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);  //
    
    
    
    TIM_ARRPreloadConfig(TIM3, ENABLE); //使能TIM1在ARR上的预装载寄存器
    
    TIM_Cmd(TIM3, ENABLE);  //使能TIM3


    
}

TIM4输出4路PWM

void TIM4_PWM_Init(u16 arr,u16 psc)
{  
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;
 
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);// 
     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE);  //
                                                                             
 
        //CH1--PB6
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //TIM4_CH1
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    
        //CH2--PB7
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
 
    //CH3--PB8
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
 
        //CH4--PB9
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
 
 
    
    TIM_TimeBaseStructure.TIM_Period = arr; //
    TIM_TimeBaseStructure.TIM_Prescaler =psc; //
    TIM_TimeBaseStructure.TIM_ClockDivision = 0; //
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //
    TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //
 
 
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //
    TIM_OCInitStructure.TIM_Pulse = 0; //
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //
    TIM_OC1Init(TIM4, &TIM_OCInitStructure);  //
    
    
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //
    TIM_OCInitStructure.TIM_Pulse = 0; //
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //
    TIM_OC2Init(TIM4, &TIM_OCInitStructure);  //
    
    
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //
    TIM_OCInitStructure.TIM_Pulse = 0; //
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //
    TIM_OC3Init(TIM4, &TIM_OCInitStructure);  //
    
    
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //
    TIM_OCInitStructure.TIM_Pulse = 0; //
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //
    TIM_OC4Init(TIM4, &TIM_OCInitStructure);  //
 
  TIM_CtrlPWMOutputs(TIM4,ENABLE);    //
 
    TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);  //
    TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);  //
    TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);  //
    TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);  //
    
    TIM_ARRPreloadConfig(TIM4, ENABLE); //
    
    TIM_Cmd(TIM4, ENABLE);  //
 
   
}