Stm32高级定时器1产生6通道的PWM

18377006655

void TIM1_Pwm_Init(u16 arr,u16 psc)
{
        RCC->APB2ENR |=1<<11;
  RCC->APB2ENR|=1<<2;
  RCC->APB2ENR|=1<<3;
  RCC->APB2ENR|=1<<0;               
       
        GPIOA->CRH &=0xFFFFF000;
        GPIOA->CRH |=0x00000BBB;
        //GPIOA->ODR |=1<<8;
       
        GPIOB->CRH &=0x000FFFFF;
        GPIOB->CRH &=0xBBBFFFFF;
        TIM1->ARR=arr;
        TIM1->PSC=psc;
       
        TIM1->CCMR1 |=6<<4;
        TIM1->CCMR1 |=1<<3;       
        TIM1->CCMR1 |=6<<12;
        TIM1->CCMR1 |=1<<11;       
        //TIM1->CCMR1 &=0x9797;
        //TIM1->CCMR1 |=0x6868;
        TIM1->CCMR2 |=6<<4;
        TIM1->CCMR2 |=1<<3;
       
        TIM1->CR1 |=1<<7;
        TIM1->CR1 |=1<<4;  //&#188;&#198;êy&#198;÷&#207;ò&#207;&#194;&#188;&#198;êy
       
        //TIM1->CCER |=3<<0;
        //TIM1->CCER |=3<<4;
        //TIM1->CCER |=3<<8;
        TIM1->CCER |=0x0FFF;
        //TIM1->CCER |=0x1ddd;  //ê1&#196;ü±è&#189;&#207;ê&#228;3&#246;
       
        TIM1->BDTR |=1<<15;  //&#191;a&#198;&#244;&#203;ùóDí¨μà
        TIM1->BDTR |=0xCD;  //&#203;à&#199;&#248;ê±&#188;&#228;éè&#182;¨
       
        TIM1->CCR1=20;  //éè&#214;&#195;&#213;&#188;&#191;&#213;±è
        TIM1->CCR2=40;
  TIM1->CCR3=60;
       
        TIM1->EGR |=1<<0;
        TIM1->CR1 |=1<<0;
}


这是我写的程序，可是不知道怎么情况，发现输出的PWM不可以的，望各位大神指教出哪里错了