请问如何配置STM8S105 TIM1 CH1-CH4各通道才能输出PWM信号

只看该作者 · 2015-1-28 10:09

如题，有哪位高手知道如何配置STM8S105的TIM1各个通道才能输出PWM信号？不胜感激
根据官方例子修改，CH2和CH4能正常输出PWM，但是CH1和CH3就是不正常

#define CCR1_Val  ((uint16_t)2047)

#define CCR2_Val  ((uint16_t)1535)

#define CCR3_Val ((uint16_t)1023)

#define CCR4_Val  ((uint16_t)511)

static void TIM1_Config(void)

{



   TIM1_DeInit();



  /* Time Base configuration */

  /*

  TIM1_Period = 4095

  TIM1_Prescaler = 0

  TIM1_CounterMode = TIM1_COUNTERMODE_UP

  TIM1_RepetitionCounter = 0

  */



  TIM1_TimeBaseInit(0, TIM1_COUNTERMODE_UP, 4095, 0);



  /* Channel 1, 2,3 and 4 Configuration in PWM mode */

  

  /*

  TIM1_OCMode = TIM1_OCMODE_PWM2

  TIM1_OutputState = TIM1_OUTPUTSTATE_ENABLE

  TIM1_OutputNState = TIM1_OUTPUTNSTATE_ENABLE

  TIM1_Pulse = CCR1_Val

  TIM1_OCPolarity = TIM1_OCPOLARITY_LOW

  TIM1_OCNPolarity = TIM1_OCNPOLARITY_HIGH

  TIM1_OCIdleState = TIM1_OCIDLESTATE_SET

  TIM1_OCNIdleState = TIM1_OCIDLESTATE_RESET

  

  */

  TIM1_OC1Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_ENABLE,

               CCR1_Val, TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_SET,

               TIM1_OCNIDLESTATE_RESET); 



  /*TIM1_Pulse = CCR2_Val*/

  TIM1_OC2Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_ENABLE, CCR2_Val,

               TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_SET, 

               TIM1_OCNIDLESTATE_RESET);



  /*TIM1_Pulse = CCR3_Val*/

  TIM1_OC3Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_ENABLE,

               CCR3_Val, TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_SET,

               TIM1_OCNIDLESTATE_RESET);



  /*TIM1_Pulse = CCR4_Val*/

  TIM1_OC4Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, CCR4_Val, TIM1_OCPOLARITY_LOW,

               TIM1_OCIDLESTATE_SET);



  /* TIM1 counter enable */

  TIM1_Cmd(ENABLE);



  /* TIM1 Main Output Enable */

  TIM1_CtrlPWMOutputs(ENABLE);

}