stm8 tim1 pwm互补问题

有个脚落 · 发表于 2017-2-17 16:04:50

void TIM1_PWM_init()
{
  GPIO_Init(GPIOC, GPIO_PIN_3, GPIO_MODE_OUT_PP_HIGH_FAST);
  GPIO_Init(GPIOC, GPIO_PIN_4, GPIO_MODE_OUT_PP_HIGH_FAST);
  GPIO_Init(GPIOC, GPIO_PIN_6, GPIO_MODE_OUT_PP_HIGH_FAST);
  GPIO_Init(GPIOC, GPIO_PIN_7, GPIO_MODE_OUT_PP_HIGH_FAST);

  CLK->PCKENR1 |=0X80;                      //使能TIME1时钟源
   TIM1->EGR |=0X01;                         //初始化计数器，产生更新事件
   TIM1->RCR =0X00;                         //关闭计数器
//=======================================================开启时钟、关闭计数器
   TIM1->SMCR =0X00;
   TIM1->ETR =0X00;                         //使用内部Fmaster时钟，16M
   TIM1->PSCRH  =0X00;
   TIM1->PSCRL  =0X02;                         //2分频
   TIM1->ARRH =0x00;
   TIM1->ARRL =Cycle_50us;                   //重装值 -->50us/次
   TIM1->RCR =0X00;                         //重复计数0
   TIM1->CR1 =0X00;                         //向上计数
//=======================================================时基单元
//通道1 CH1 输出 CH1N禁止输出
   TIM1->CCMR1  =0x70;                         //PWM模式2,CC1通道配置为输出
   TIM1->CCR1H  =0X00;
   TIM1->CCR1L  =Cycle_50us>>1;                //占空比
   TIM1->CCER1 |=0X03;                         //CC1配置为输出，低电平有效
//通道2
   TIM1->CCMR2  =0X70;
   TIM1->CCR2H  =0X00;
   TIM1->CCR2L  =Cycle_50us>>1;
   TIM1->CCER1 |=(1<<5)|(1<<4);
//通道3
   TIM1->CCMR3  =0X70;
   TIM1->CCR3H  =0X00;
   TIM1->CCR3L  =Cycle_50us>>1;
   TIM1->CCER2 |=(1<<1)|(1<<0);
//通道4
   TIM1->CCMR4  =0X70;
   TIM1->CCR4H  =0X00;
   TIM1->CCR4L  =Cycle_50us>>1;
   TIM1->CCER2  |=(1<<5)|(1<<4);


   TIM1->BKR =0X80;       //静止刹车
   TIM1->CR1 |=0X01;       //使能时钟源
}