stm32f103高级定时器TIM1更新中断管理波形求助!!

领悟 · 发表于 2017-10-15 13:21:37

如图：黄色=CH1,紫色=CH1N 现在我要做的是在更新中断里通过反馈电压ADC去调节 CH1的波形  也就是打开或者关闭  但是现在的问题是：在我开关CH1时 CH1N会出现不正常的情况可以看到紫的的CH1N会有一个尖峰脉冲多余的  代码如下：

void TIM1_UP_IRQHandler(void)
{
  if ( (TIM1->SR & TIM_IT_Update) && (TIM1->DIER & TIM_IT_Update) )
  {
switch ( MachineControl.StartFinshFlag )
{
   case 1:
   PidAdjust.FeedBackCurr =
(ADC_ConvertedValue[0][1] + ADC_ConvertedValue[1][1] +
   ADC_ConvertedValue[2][1] + ADC_ConvertedValue[3][1] +
   ADC_ConvertedValue[4][1] + ADC_ConvertedValue[5][1] ) / 6 ;
if ( PidAdjust.FeedBackCurr > 400 ) ///<ADC调节
   {
TIM1->CCER &= (u16)0xFFFE ;///<关闭CH1的输出状态
}
else
   {
TIM1->CCER |= (u16)0x0001 ;///<打开CH1的输出状态
   }
   break;
}
TIM1->SR = (u16)~TIM_IT_Update;
  }
}
恳求各位支援谢谢了！！！

领悟 · 发表于 2017-10-15 13:24:27

void TIM1_Mode_Config( u8 modechange )
{
TIM_BDTRInitTypeDef  TIM_BDTRInitStructure;

// 开启定时器时钟,即内部时钟CK_INT=72M
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_DeInit(TIM1);
TIM_TimeBaseStructure.TIM_Period       = 1674;
TIM_TimeBaseStructure.TIM_Prescaler    = PWM_PRSC;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV2;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

TIM_OCInitTypeDef  TIM_OCInitStructure;
  TIM_OCStructInit( &TIM_OCInitStructure );
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       = 837;
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;
TIM_OC1Init(TIM1,&TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);

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  = DEADTIME;
TIM_BDTRInitStructure.TIM_Break    = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);

TIM_ClearFlag(TIM1,TIM_FLAG_Update);

TIM_Cmd(TIM1,DISABLE);
TIM_CtrlPWMOutputs(TIM1,DISABLE);

  TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE);

NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig ( NVIC_PriorityGroup_0 );
NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

}

这个是TIM1的初始化代码！！