STM TIM1的3路PWM如何产生相位差？

liu814084856 · 发表于 2013-5-16 14:31:29

RT

程序如下：
void PWM_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

//开启TIM和相应端口时钟
//启动GPIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB,
                       ENABLE);
//启动AFIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
//启动TIM1
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
TIM_Cmd(TIM1, ENABLE);
   //TIM1基本计数器设置（设置PWM频率）
    //频率=TIM1_CLK/(ARR+1)
    TIM_BaseInitStructure.TIM_Period = 1000-1;    //1000HZ
    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);
    //启用ARR的影子寄存器（直到产生更新事件才更改设置）
    TIM_ARRPreloadConfig(TIM1, ENABLE);

//GPIO做相应设置，为AF输出                  //PA8，PB13一组互补输出 PA9，PB14一组互补输出
//PA.8/9口设置为TIM1的OC1输出口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//PB.13/14口设置为TIM1_CH1N和TIM1_CH2N输出口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//Step3. TIM模块初始化
        //TIM1_OC1模块设置（设置1通道占空比）
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
    TIM_OCInitStructure.TIM_Pulse = 500;
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);
//启用CCR1寄存器的影子寄存器（直到产生更新事件才更改设置）
    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
     //TIM1开启

TIM_CtrlPWMOutputs(TIM1, ENABLE);
delay();

// void TIM_Configuration(void)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//PB.13/14口设置为TIM1_CH1N和TIM1_CH2N输出口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

//TIM1_OC2模块设置（设置2通道占空比）
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 500;
    TIM_OC2Init(TIM1, &TIM_OCInitStructure);
    //启用CCR2寄存器的影子寄存器（直到产生更新事件才更改设置）
    TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_CtrlPWMOutputs(TIM1, ENABLE);
delay();

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//PB.13/14口设置为TIM1_CH1N和TIM1_CH2N输出口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

//    //TIM1_OC1模块设置（设置1通道占空比）
//    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
//    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
//    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
//    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
//    TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
//    TIM_OCInitStructure.TIM_Pulse = 500;
//    TIM_OC1Init(TIM1, &TIM_OCInitStructure);
// //启用CCR1寄存器的影子寄存器（直到产生更新事件才更改设置）
//    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

//    //TIM1_OC2模块设置（设置2通道占空比）
//    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
//    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
//    TIM_OCInitStructure.TIM_Pulse = 500;
//    TIM_OC2Init(TIM1, &TIM_OCInitStructure);
//    //启用CCR2寄存器的影子寄存器（直到产生更新事件才更改设置）
//    TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);

//TIM1_OC3模块设置（设置3通道占空比）
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 500;
    TIM_OC3Init(TIM1, &TIM_OCInitStructure);
    //启用CCR3寄存器的影子寄存器（直到产生更新事件才更改设置）
    TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);

    //死区设置
//    TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
//    TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
//    TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
//    TIM_BDTRInitStructure.TIM_DeadTime = 0xF0; //这里调整死区大小0-0xff     死区最大14us
//    TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
//    TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
//    TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
//    TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

    //TIM1开启
    TIM_Cmd(TIM1, ENABLE);
    //TIM1_OC通道输出PWM（一定要加）
    TIM_CtrlPWMOutputs(TIM1, ENABLE);
}