[请教]STM32F103 TIM1 输出PWM波不互补问题

只看该作者 · 2012-8-2 16:37

使用STM32F103 TIM1 输出PWM波不互补，channel 1和channel 1N的波形一样，不知道什么原因。
程序
void PWM_Config(void)
{

   GPIO_InitTypeDef GPIO_InitStructure;
/////////////////IO Config//////////////////////////////////////////
//4.<PA8--PA10> PWM(TIM1_CH1 C+,TIM1_CH2 B+,TIM1_CH3 A+)  ->BLMOTOR
   GPIO_InitStructure.GPIO_Pin = PWM_CP_PIN|PWM_BP_PIN|PWM_AP_PIN;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
   GPIO_Init(GPIOA, &GPIO_InitStructure);

//10.<PB13--PB15> PWM(TIM1_CH1N C-,TIM1_CH2N B-,TIM1_CH3N A-)  ->BLMOTOR
   GPIO_InitStructure.GPIO_Pin = PWM_CN_PIN|PWM_BN_PIN|PWM_AN_PIN;
   GPIO_Init(GPIOB, &GPIO_InitStructure);

//7.<PB0,PB1,PB12> BC,AC,AB (EXINT) ->BLMOTOR  检测电机当前状态

/////////////////Timer1 Config//////////////////////////////////////////

  /* Time Base configuration */
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;
  TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

  TIM_DeInit(TIM1);             //重设缺省值

  TIM_TimeBaseStructure.TIM_Prescaler = 0; //预分频（时钟分频）72M/（0+1）=72M
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
  TIM_TimeBaseStructure.TIM_Period = 9000-1;                   //装载值 72M/9000 = 8k(频率)
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;    //不分割
  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  /* Channel 1 Configuration in PWM mode */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 3000-1;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_Low;//TIM_OCNPolarity_Low;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Set;//TIM_OCNIdleState_Set;
//配置CCR1
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);

  /* TIM1 counter enable */
  TIM_Cmd(TIM1, ENABLE);
  /* Main Output Enable */
  TIM_CtrlPWMOutputs(TIM1, ENABLE);


}

只看该作者 · 2012-12-20 22:39

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
试一试这4句

只看该作者 · 2013-7-19 16:18

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
   TIM_OCInitStructure.TIM_OCNPolarity =  TIM_OCNPolarity_High;
   TIM_OCInitStructure.TIM_OCIdleState =  TIM_OCIdleState_Reset;
   TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

就可以了。