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標(biāo)題: 定時中斷固定頻率紅外線信號長短接收控制 [打印本頁]

作者: 俠行江湖 時間: 2017-4-8 18:52
標(biāo)題: 定時中斷固定頻率紅外線信號長短接收控制
最近在利用STM8 TIM4定時中斷做一個固定頻率紅外線信號長短接收控制LED燈程序，但是就是執(zhí)行不了，大俠們幫我看看，問題出在哪了？
描述：1. 紅外線（PWM方波)F=125HZ ,T=8ms , D=0.4；
      2. 單片機(jī)PC5口接收紅外信號；
      3. TIM4定時時間100 us;
      3. 先是判斷紅外信號頻率是否正確，然后根據(jù)接收信號時間的長短來控制不同LED燈亮滅。接收信號時間T_js:
         1) 短接收：T_js>3s時，LED1亮；2）長接收：0.2s<T_js<3s時,LED3亮。3）T_js<0.2s 無效
程序如下：
#define PT_INPUT_HIGH_COUNTER_MAX  40 //4ms
#define PT_INPUT_LOW_COUNTER_MAX 520  //5.2ms

#define PT_TRACE_PEROID_LOW_THRESHOLD 70 //7ms
#define PT_TRACE_PEROID_HIGH_THRESHOLD  90 //9ms

#define IR_SENSE_SHORT_PRESS_THRESHOLD  2000 //200ms
#define IR_SENSE_LONG_PRESS_THRESHOLD  30000  //3s
void PT91_Recv_Handle(void)
{
  static u8 flag = 0; //反轉(zhuǎn)的標(biāo)志
  //PT_Level_Read_Temp=GPIO_ReadInputPin(PT91_PORT,PT91_PIN);
  IR_Input_Level=GPIO_ReadInputPin(PT91_PORT,PT91_PIN);
  // PT_PIN Trace follow start
  if(IR_Input_Level==HIGH)//High
{
   if(PT_Input_High_Counter<PT_INPUT_HIGH_COUNTER_MAX)// prevent to flow
   {
      PT_Input_High_Counter++;
   }
   else
   {
      PT_Input_High_Counter=0;
   }
}
  else//Low
{
   if(PT_Input_Low_Counter<PT_INPUT_LOW_COUNTER_MAX)// prevent to flow
   {
      PT_Input_Low_Counter++;
   }
   else
   {
      PT_Input_Low_Counter=0;
   }
}
// PT_PIN Trace follow end
// PT_PIN wave peroid judge start
PT_Trace_Peroid=PT_Input_Low_Counter+PT_Input_High_Counter;
PT_Input_PR=PT_Trace_Peroid;
if(PT_Trace_Peroid>PT_TRACE_PEROID_LOW_THRESHOLD && PT_Trace_Peroid<PT_TRACE_PEROID_HIGH_THRESHOLD) //trace success
{
   PT_Trace_Success_Counter++;
   if(PT_Trace_Success_Counter>IR_SENSE_LONG_PRESS_THRESHOLD)// long IR sensed
   {
      Short_IR_sense_judge_state=NO;
      Long_IR_sense_judge_state=YES;
      PT_Trace_Success_Counter=0;
      // long IR sense handle
      LED1_L;
   }
   else if(PT_Trace_Success_Counter>IR_SENSE_SHORT_PRESS_THRESHOLD)
   {
      if(flag)
      {
         Long_IR_sense_judge_state=YES;
      }
      Short_IR_sense_judge_state=YES;
      PT_Trace_Success_Counter=0;
      // short IR sense handle
      LED3_L;
   }
   else
   {
      PT_Trace_Success_Counter++;
   }
   flag = !flag;
}
else //trace fail
         {
         PT_Trace_Success_Counter=0;
         PT_Input_High_Counter=0;
         PT_Input_Low_Counter=0;
         Short_IR_sense_judge_state=NO;
         Long_IR_sense_judge_state=NO;
         }
   // PT_PIN wave peroid judge end
}

INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23)
{
/* In order to detect unexpected events during development,
   it is recommended to set a breakpoint on the following instruction.
  */
TIM4_ClearITPendingBit(TIM4_IT_UPDATE);//清除更新標(biāo)志位
PT91_Recv_Handle();
}

作者: 俠行江湖 時間: 2017-4-8 21:36
自己頂一下

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