STM32F103 定时器双溢出更新问题

只看该作者 · 2017-4-24 17:22

定时器是中央对齐的互补PWM输出，我想在上溢和下溢时都能进中断，我现在是只有上溢能进中断，求高手指点。void SVPWM_3ShuntInit(void)
{
  ADC_InitTypeDef ADC_InitStructure;
  TIM_TimeBaseInitTypeDef TIM1_TimeBaseStructure;
  TIM_OCInitTypeDef TIM1_OCInitStructure;
  TIM_BDTRInitTypeDef TIM1_BDTRInitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB ,ENABLE);//IOê±Öó
  GPIO_StructInit(&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;//CH1P CH2P CH3P CH4P
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;  //CH1N CH2N CH3N CH4N
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOB,&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOB,&GPIO_InitStructure);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
  TIM_DeInit(TIM1);//ÖØÖÃè±ê¡Öμ
  TIM_TimeBaseStructInit(&TIM1_TimeBaseStructure);
  TIM1_TimeBaseStructure.TIM_Prescaler = 0x0;
  TIM1_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned3;
  TIM1_TimeBaseStructure.TIM_Period = PWM_PERIOD;
  TIM1_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV2;
  TIM1_TimeBaseStructure.TIM_RepetitionCounter = REP_RATE;
  TIM_TimeBaseInit(TIM1, &TIM1_TimeBaseStructure);

  TIM_OCStructInit(&TIM1_OCInitStructure);
  TIM1_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM1_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM1_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM1_OCInitStructure.TIM_Pulse = 0x505;
  TIM1_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM1_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  TIM1_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
  TIM1_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

  TIM_OC1Init(TIM1, &TIM1_OCInitStructure);
  TIM_OC2Init(TIM1, &TIM1_OCInitStructure);
  TIM_OC3Init(TIM1, &TIM1_OCInitStructure);
  TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
  TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
  TIM_OCStructInit(&TIM1_OCInitStructure);
  TIM1_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM1_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM1_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
  TIM1_OCInitStructure.TIM_Pulse = PWM_PERIOD - 1;
  TIM1_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM1_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
  TIM1_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
  TIM1_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
  TIM_OC4Init(TIM1, &TIM1_OCInitStructure);
  TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);

  TIM1_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
  TIM1_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
  TIM1_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
  TIM1_BDTRInitStructure.TIM_DeadTime = DEADTIME;
  TIM1_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
  TIM1_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;
  TIM1_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
  TIM_BDTRConfig(TIM1, &TIM1_BDTRInitStructure);

  TIM_ClearITPendingBit(TIM1, TIM_IT_Break);
  TIM_ClearFlag(TIM1, TIM_FLAG_Update);
  TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);
  TIM_Cmd(TIM1, ENABLE);
  TIM_CtrlPWMOutputs(TIM1, ENABLE);

  NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = TIM1_UP_PRE_EMPTION_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = TIM1_UP_SUB_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  NVIC_InitStructure.NVIC_IRQChannel = TIM1_BRK_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = BRK_PRE_EMPTION_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = BRK_SUB_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

只看该作者 · 2017-4-24 17:24

中央对齐，应该有两个溢出才对的，向上计数时，计到加载值，向下计数时，计到0。但是我只有向上计数进中断，向下计数不进中断。