TIM1 的7个pwm引脚唯独通道2的正没有输出，请教？

只看该作者 · 2010-8-17 17:02

本帖最后由 chunhuaqioushi 于 2010-8-17 17:17 编辑

使用芯片是stm32f103c8t6 最后标识是chn014
下面是我的初始化，初始化后通道1 3 的正反输出都是正常的，通道2的反也是正常的，只有通道2的正是没有波形的，知道的指导下吧

//---------------------------------------------------------------------------------
static void BldcGpioInitial(void){
      GPIO_InitTypeDef GPIO_InitStructure;

      /* GPIOA Configuration: Channel 1, 2 and 3 as alternate function push-pull */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      /* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      /* GPIOB Configuration: BKIN pin */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOB, &GPIO_InitStructure);
      //LED Configuration
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_10|GPIO_Pin_11;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
      GPIO_Init(GPIOB, &GPIO_InitStructure);
      GPIO_ResetBits(GPIOB,GPIO_Pin_2|GPIO_Pin_10|GPIO_Pin_11);//关闭灯
      //MOTOR ADDRESS
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
      GPIO_Init(GPIOB, &GPIO_InitStructure);
}
//-------------------------------------------------------------------------------
static void BldcRCCInitial(void){

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOB|\
      RCC_APB2Periph_AFIO, ENABLE);
}
static void BldcNVICInitial(void){
      /*
      NVIC_InitTypeDef NVIC_InitStructure;
      NVIC_InitStructure.NVIC_IRQChannel = TIM1_TRG_COM_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
      */

}
static void BldcTimInitial(void){
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef  TIM_OCInitStructure;
      TIM_BDTRInitTypeDef TIM_BDTRInitStructure;


      /* Time Base configuration */

      TIM_TimeBaseStructure.TIM_Prescaler = 2;
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
      TIM_TimeBaseStructure.TIM_Period = 1000;
      TIM_TimeBaseStructure.TIM_ClockDivision = 0;
      TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

      TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);


      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
      TIM_OCInitStructure.TIM_Pulse = 500;
      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_OCNIdleState_Set;

      TIM_OC1Init(TIM1, &TIM_OCInitStructure);

      TIM_OCInitStructure.TIM_Pulse = 500;
      TIM_OC2Init(TIM1, &TIM_OCInitStructure);

      TIM_OCInitStructure.TIM_Pulse = 500;
      TIM_OC3Init(TIM1, &TIM_OCInitStructure);


      TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
      TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
      TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
      TIM_BDTRInitStructure.TIM_DeadTime = 1;
      TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
      TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
      TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;

      TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);



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

}