MM32F013x芯片学习-TIM1发互补PWM波形

调试过程中因为疏忽了一个位的操作，导致无输出，一番检查后发现MOE位必须要使能，否则，无波形输出.使能BDTR的MOE位后，波形正常输出，总体操作还是比较简单的，除了MOE没有使能外，其他寄存器的配置很顺利。

该模块优点是操作简单，可互补输出，插入死区，通道极性可修改，灵活关闭通道，

缺点是当通道被关闭后，无法修改被关闭通道的电平，只能是默认的低电平，这里还不够灵活。

复制

void TIM1_pwm_init(void)

{

    //pin mux

    RCC->AHBENR |= RCC_AHBENR_GPIOB; //enable GPIOB clock



    //B14->TIM1_CH1

    GPIOB->CRH &=  ~(GPIO_CNF_MODE_MASK << GPIO_CRH_CNF_MODE_14_Pos);

    GPIOB->CRH |= GPIO_CNF_MODE_AF_PP<< GPIO_CRH_CNF_MODE_14_Pos;



    GPIOB->AFRH &= ~GPIO_AFRH_AFR14;

    GPIOB->AFRH |= (GPIO_AF_MODE7 << GPIO_AFRH_AFR14_Pos);



    //B13->TIM1_CH1N

    GPIOB->CRH &=  ~(GPIO_CNF_MODE_MASK << GPIO_CRH_CNF_MODE_13_Pos);

    GPIOB->CRH |= GPIO_CNF_MODE_AF_PP<< GPIO_CRH_CNF_MODE_13_Pos;    



    GPIOB->AFRH &= ~GPIO_AFRH_AFR13;

    GPIOB->AFRH |= (GPIO_AF_MODE2 << GPIO_AFRH_AFR13_Pos);



    //init timer1

    RCC->APB2ENR |= RCC_APB2ENR_TIM1;//enable clock



    TIM1->PSC = 71;// 71+1

    TIM1->ARR = 50;// 50us

    TIM1->DIER |= TIM_DIER_UIEN;//enable update interrupt



    TIM1->CCR1 = 25;//duty



    //oc1 configure

    TIM1->CCMR1 &= ~TIM_CCMR1_CC1S;//output

    TIM1->CCMR1 |= TIM_CCMR1_OC1FE;

    TIM1->CCMR1 |= TIM_CCMR1_OC1PE;

    TIM1->CCMR1 |= TIM_CCMR1_OC1M_PWM1;



    //output control

    TIM1->CCER |= TIM_CCER_CC1EN;

    TIM1->CCER &= ~TIM_CCER_CC1P;

    TIM1->CCER |= TIM_CCER_CC1NEN;

    TIM1->CCER &= ~TIM_CCER_CC1NP;

    //TIM1->CCER |= TIM_CCER_CC1NP;



    //set dead time

    TIM1->CR1 |= TIM_CR1_CKD_DIV4;

    TIM1->BDTR |= 36;// 2us

    

    TIM3->CR1 |= TIM_CR1_ARPE;   //ARPEenable

    TIM1->CR1 |= TIM_CR1_CEN;//counter enable    

    

    TIM1->BDTR |= TIM_BDTR_MOEN;//主输出使能

    



    NVIC_SetPriority(TIM1_BRK_UP_TRG_COM_IRQn,1);

    NVIC_EnableIRQ(TIM1_BRK_UP_TRG_COM_IRQn);    

}

 



void TIM1_BRK_UP_TRG_COM_IRQHandler(void)

{

    if(TIM1->SR & TIM_SR_UIF)

    {

        TIM1->SR &= ~TIM_SR_UIF;



        LED1_TOGGLE;

    }



}

谢谢分享经验