stm32定时器1的2路互补PWM

时间：2021-09-15 20:48:01
void TIM1_PWM_Ini(u16 arr,u16 psc)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;
    TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
//开启时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);                            //使能定时器3时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);       //使能GPIO和服用功能时钟
//  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);                             //引脚重映射要开这个时钟
//初始化GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9;    //PWM输出在PA8,9,10
    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

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14;  //PWM输出在PA7
    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

//初始化定时器 TIM1
    TIM_TimeBaseStructure.TIM_Period = arr;                             //设置在自动重装载周期值
    TIM_TimeBaseStructure.TIM_Prescaler =psc;                           //设置预分频值
    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_TimeBaseStructure.TIM_RepetitionCounter=0;                      //重复寄存器，用于自动更新pwm占空比
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);                     

//pwm输出配置,TIM_OCInitStructure共七项配置
    TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;                     //设置为pwm2输出模式

			TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;  
    //TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;              //设置输出极性//输出极性和互补极性的有效电平为低
    TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;         //使能该通道输出//比较输出使能
//下面几个参数(除了pulse)是高级定时器才会用到，通用定时器不用配置
  //  TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCPolarity_Low;  
	 TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCPolarity_High;                //设置互补端输出极性//输出极性和互补极性的有效电平为低
    TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;       //使能互补端输出
    TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset;          //死区后输出状态
    TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCIdleState_Reset;         //死区后互补端输出状态
//设置通道1捕获比较寄存器的脉冲值-占空比为50%
    TIM_OCInitStructure.TIM_Pulse=CCR1_Val;
    TIM_OC1Init(TIM1,&TIM_OCInitStructure);                             //设置通道1
//设置通道2捕获比较寄存器的脉冲值-占空比为25%
    TIM_OCInitStructure.TIM_Pulse=CCR2_Val;
    TIM_OC2Init(TIM1,&TIM_OCInitStructure);
//设置通道3捕获比较寄存器的脉冲值-占空比为12.5%
    TIM_OCInitStructure.TIM_Pulse=CCR3_Val;
    TIM_OC3Init(TIM1,&TIM_OCInitStructure);
//死区和刹车功能配置，高级定时器才有的，通用定时器不用配置TIM_BDTRInitStructure，共七项配置
        TIM_BDTRInitStructure.TIM_OSSRState=TIM_OSSRState_Disable;          //运行模式下输出选择//运行模式下“关闭状态”使能
        TIM_BDTRInitStructure.TIM_OSSIState=TIM_OSSIState_Disable;          //空闲模式下输出选择//关闭模式下“关闭状态”使能
        TIM_BDTRInitStructure.TIM_LOCKLevel=TIM_LOCKLevel_OFF;              //锁定设置  //锁定关闭
        TIM_BDTRInitStructure.TIM_DeadTime=0x90;                            //死区时间设置
        TIM_BDTRInitStructure.TIM_Break=TIM_Break_Disable;                      //刹车功能使能
        TIM_BDTRInitStructure.TIM_BreakPolarity=TIM_BreakPolarity_High;         //刹车输入极性 //刹车输入高电平有效    
        TIM_BDTRInitStructure.TIM_AutomaticOutput=TIM_AutomaticOutput_Enable;   //自动输出使能

        TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);        
//使能端的打开
        TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);        //使能TIMx在CCR1上的预装载寄存器?
        TIM_ARRPreloadConfig(TIM1,ENABLE);                      //使能TIMx在ARR上的预装载寄存器?
        TIM_Cmd(TIM1,ENABLE);                               //打开TIM2?
//下面这句是高级定时器才有的，输出pwm必须打开?
        TIM_CtrlPWMOutputs(TIM1,ENABLE);                        //pwm输出使能，一定要记得打开
}

标签：

相关文章