新唐的PWM产生波形，其实起始相位偏移点可以控制的

void PWM1P0_IRQHandler(void)

{

        /* A相比较事件发生(120)*/

        PWM1->CNTEN |= PWM_CNTEN_CNTEN2_Msk;

        /*标志被硬件置1。软件写1到该位->清标志。*/

        <font color="#ff0000">PWM1->INTSTS0 |= PWM_INTSTS0_CMPUIF0_Msk;    --------<b>这一句，依TRM是写 1 清零的。原想判断哪个通道引起的事件，可这里就是句废话。。。行不通。有人能解释下吗？</b></font>

        

        NVIC_DisableIRQ(PWM1P0_IRQn);

}



void PWM1P1_IRQHandler(void)

{

        /* B相比较事件发生(120)*/

        PWM1->CNTEN |= PWM_CNTEN_CNTEN4_Msk;



        

        NVIC_DisableIRQ(PWM1P1_IRQn);

}



void PWM1P2_IRQHandler(void)

{

        /* c相比较事件发生(120)*/

        PWM_SET_CMR(PWM1, 0, 32726);   //恢复前两相的占空比50%

        PWM_SET_CMR(PWM1, 2, 32726);



        

        NVIC_DisableIRQ(PWM1P2_IRQn);

}

PWM_DISABLE_COMPLEMENTARY_MODE(PWM1);



    /*Set PWM Timer clock prescaler*/

    PWM_SET_PRESCALER(PWM1, 0, 21); 

        PWM_SET_PRESCALER(PWM1, 2, 21);

        PWM_SET_PRESCALER(PWM1, 4, 21);

    /*Set PWM Timer duty = 120° */

    PWM_SET_CMR(PWM1, 0, 21817);

        PWM_SET_CMR(PWM1, 2, 21817);

        PWM_SET_CMR(PWM1, 4, 32726);

    /*Set PWM Timer period*/

    PWM_SET_CNR(PWM1, 0, 65453);

        PWM_SET_CNR(PWM1, 2, 65453);

        PWM_SET_CNR(PWM1, 4, 65453);



    /* Set waveform generation */

        /*PWM1 CH0\2\4 设置PRDPCTL0 = 0x01 => PWM周期点输出LOW        */

        PWM1->WGCTL0 = (PWM1->WGCTL0 & ~PWM_WGCTL0_PRDPCTL0_Msk) | (PWM_OUTPUT_NOTHING<<PWM_WGCTL0_PRDPCTL0_Pos);

        /*PWM1 CH0\2\4 设置CMPDCTL0 零点输出LOW*/

        PWM1->WGCTL0 = (PWM1->WGCTL0 & ~PWM_WGCTL0_ZPCTL0_Msk) | (PWM_OUTPUT_HIGH << PWM_WGCTL0_ZPCTL0_Pos);

        PWM1->WGCTL0 = (PWM1->WGCTL0 & ~PWM_WGCTL0_ZPCTL2_Msk) | (PWM_OUTPUT_HIGH << PWM_WGCTL0_ZPCTL2_Pos);

        PWM1->WGCTL0 = (PWM1->WGCTL0 & ~PWM_WGCTL0_ZPCTL4_Msk) | (PWM_OUTPUT_HIGH << PWM_WGCTL0_ZPCTL4_Pos);

        /*PWM1 CH0\2\4 设置CMPDCTL1 => PWM向上计数，比较点输出HIGH*/

        PWM1->WGCTL1 = (PWM1->WGCTL1 & ~PWM_WGCTL1_CMPUCTL0_Msk) | (PWM_OUTPUT_LOW<<PWM_WGCTL1_CMPUCTL0_Pos);

        PWM1->WGCTL1 = (PWM1->WGCTL1 & ~PWM_WGCTL1_CMPUCTL2_Msk) | (PWM_OUTPUT_LOW<<PWM_WGCTL1_CMPUCTL2_Pos);

        PWM1->WGCTL1 = (PWM1->WGCTL1 & ~PWM_WGCTL1_CMPUCTL4_Msk) | (PWM_OUTPUT_LOW<<PWM_WGCTL1_CMPUCTL4_Pos);

        

   // Enable output of all PWM1 channels

    PWM1->POEN |= PWM_POEN_POEN0_Msk | PWM_POEN_POEN2_Msk | PWM_POEN_POEN4_Msk;



    // Enable PWM1 channel 0\2\4 period interrupt.

    PWM1->INTEN0 = (PWM1->INTEN0 & ~PWM_INTEN0_CMPUIEN0_Msk) | PWM_INTEN0_CMPUIEN0_Msk;

        PWM1->INTEN0 = (PWM1->INTEN0 & ~PWM_INTEN0_CMPUIEN2_Msk) | PWM_INTEN0_CMPUIEN2_Msk;

        PWM1->INTEN0 = (PWM1->INTEN0 & ~PWM_INTEN0_CMPUIEN4_Msk) | PWM_INTEN0_CMPUIEN4_Msk;

    NVIC_EnableIRQ(PWM1P0_IRQn);

        NVIC_EnableIRQ(PWM1P1_IRQn);

        NVIC_EnableIRQ(PWM1P2_IRQn);



    // Start

        PWM1->CNTEN = 0x01u;