unsigned char set;//運行狀態(tài)標(biāo)志0運行狀態(tài);1上限值設(shè)定狀態(tài);2下限值設(shè)定狀態(tài);3偏差值設(shè)定狀態(tài)
unsigned char KEY_Variable[3];//按鍵濾波綬沖區(qū)
union{
    unsigned char  c[2];
    unsigned int X;         
  }upper_limit,lower_limit, difference;/*溫度上限設(shè)定值，下限設(shè)定值，和偏差值*/
bit bm_HOLD_Start;
bit bm_jiaozhun;
unsigned char  HOLD_Number	;