抖动累积造成误触

[EricEricLei]

void Button_Cycle_Process(Button_t *btn)
{
  uint8_t current_level = (uint8_t)btn->Read_Button_Level();//获取当前按键电平
  
  if((current_level != btn->Button_Last_Level)&&(++(btn->Debounce_Time) >= BUTTON_DEBOUNCE_TIME)) //按键电平发生变化，消抖
  {
      btn->Button_Last_Level = current_level; //更新当前按键电平
      btn->Debounce_Time = 0;                 //确定了是按下
      
      ......
  }

  ......
}

btn->Debounce_Time仅在if内清零，如果发生多次抖动，btn->Debounce_Time依然会累加，并最终被认为是一次有效按键。应该修改为：

void Button_Cycle_Process(Button_t *btn)
{
  uint8_t current_level = (uint8_t)btn->Read_Button_Level();//获取当前按键电平
  
  if((current_level != btn->Button_Last_Level)&&(++(btn->Debounce_Time) >= BUTTON_DEBOUNCE_TIME)) //按键电平发生变化，消抖
  {
      btn->Button_Last_Level = current_level; //更新当前按键电平
      btn->Debounce_Time = 0;                 //确定了是按下
      
      ......
  }
 else if(current_level == btn->Button_Last_Level)
 {
      btn->Debounce_Time = 0;
 }

 ......
}