求助原子大神，关于定时器嵌套使用问题

宇龙15 · 发表于 2015-8-12 12:29:08

定时器2：优先级2，用于检测外部边缘信号，产生中断时，清除定时器6的中断处理函数
定时器6：优先级3，定时10ms触发，产生中断时，结束检测过程，
现在遇到的问题是：定时器2的中断无法清除定时器6的中断处理函数，只能检测前面的10ms的信号。为什么定时器6的事件提前发生了，求救啊！！！
程序如下：
void TIM6_DAC_IRQHandler(void)
{
if (TIM_GetITStatus(TIM6, TIM_IT_Update) == SET)
{
TIM_ClearITPendingBit(TIM6, TIM_IT_Update);
TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);
Close_TIM2();
Close_TIM6():
Over_Flag = 1;
}

void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_CC4) == SET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}
}

void TIM6_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

/* TIM6 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);

/* Time ?¨?±?÷?ù???è?? */
TIM_TimeBaseStructure.TIM_Period = 9999;
TIM_TimeBaseStructure.TIM_Prescaler = 48/1-1;//1m
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);

TIM_ITConfig(TIM6,TIM_IT_Update,ENABLE ); //???????¨??TIM3????,???í?ü??????

/* TIM6 ???????×?è??*/
NVIC_InitStructure.NVIC_IRQChannel = TIM6_DAC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

TIM_ITConfig(TIM6,TIM_IT_Update,ENABLE );
TIM_Cmd(TIM6, ENABLE); //

}

宇龙15 · 发表于 2015-8-12 12:29:09

回复【4楼】正点原子:
---------------------------------
定时器2的capture有误操作，导致超时触发定时器6.

宇龙15 · 发表于 2015-8-12 12:32:29

不好意思，这个函数贴错了
void TIM2_IRQHandler(void)
{
  if (TIM_GetITStatus(TIM2, TIM_IT_CC4) == SET)
  {
TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);
TIM_ClearITPendingBit(TIM6, TIM_IT_Update);
  }
}