TIM1的4通道看不到波形

Blackfyre · 发表于 2017-3-10 16:58:25

用的stm32f103C8T6  TIM1 CH4通道 PA11 用keil自带的逻辑仿真没波形
void PWMInit(void)
{                               //PA11  I_Vref
      RCC.APB2ENR.bit.TIM1EN = 1;
      RCC.APB2ENR.bit.IOPAEN = 1;
      RCC.APB2ENR.bit.AFIOEN = 1;

      AFIO.MAPR.bit.TIM1_REMAP = 0;

      GPIOA.CRH.bit.MODE11 = 3;
      GPIOA.CRH.bit.CNF11 = 2;

      TIM1.ARR.bit.ARR = 9999;
      TIM1.PSC.bit.PSC = 0;

      TIM1.CCMR2.bit.OC4M = 6;
      TIM1.CCER.bit.CC4P = 0;
      TIM1.CCMR2.bit.OC4PE = 0;
      TIM1.CCER.bit.CC4E = 1;

      TIM1.CR1.bit.ARPE = 1;

      TIM1.CCR4.bit.CCR4 = 5000;
      TIM1.CR1.bit.CEN = 1;
}