单片机—多任务编程

;================================================================LedPort               Equ           P2SegPort               Equ           P0Timer1                Equ           0FB23HSec400Chg             Bit           30HSec10Chg              Bit           31HSecChg                Bit           32HMinChg                Bit           33HSec400                Data          34HSec10                 Data          35HSecond                Data          36HTemp                  Data          37HRelieve               Data          38HTemp1                 Data          39H;================================================================Org           0000HAjmp          Main;================================================================InitSysT:             Mov           Relieve,#50Mov           TMod,#00100000BMov           TL1,#Low(Timer1)Mov           TH1,#High(Timer1)Setb          EASetb          ET1Setb          TR1Mov           Sec400,#40Mov           Sec10,#10Mov           Second,#60Clr           Sec400ChgClr           Sec10ChgClr           SecChgClr           MinChgRet;================================================================Org           001BHMov           TL1,#Low(Timer1)Mov           TH1,#High(TImer1)AJmp          CTC1EntryCTC1Entry:            Setb          Sec400ChgDjnz          Sec400,T1IntOutMov           Sec400,#40Setb          Sec10ChgInc           Sec10HEXDjnz          Sec10,T1IntOutMov           Sec10,#10Setb          SecChgDjnz          Second,T1IntOutMov           Second,#60Setb          MinChgT1IntOut:             RetI            ;================================================================Delay:                Mov           R6,#40Delay1:               Mov           R7,#0Delay2:               Djnz          R7,Delay2Djnz          R6,Delay1Ret;================================================================ SegDisplay:           Mov           Dptr,#TableSegLoop:             Movc          A,@A+DptrMov           SegPort,ARet;----------------------------------------------------------------Table:                DB            11000000BDB            11111001BDB            10100100BDB            10110000BDB            10011001BDB            10010010BDB            10000010BDB            11011000BDB            10000000BDB            10010000B;================================================================Main:                 MOv           Temp1,#11111110BMov           Temp,#0Acall         InitSysTMainLoop0:            Jbc           Sec400Chg,DoSec400MainLoop1:            Jbc           Sec10Chg,DoSec10MainLoop2:            Jbc           SecChg,DoSecondMainLoop3:            Jbc           MinChg,DoMinuteAjmp          MainLoop0DoSec400:Sjmp          MainLoop1DoSec10:Mov           A,TempAcall         SegDisplayDjnz          Relieve,L3Mov           Relieve,#50Inc           TempMov           A,TempCjne          A,#9,MainLoop2Mov           Temp,#0                    L3:                   Sjmp          MainLoop2DoSecond:                           Mov           LedPort,Temp1Mov           A,Temp1Rl            AMov           Temp1,ASjmp          MainLoop3DoMinute:Sjmp          MainLoop0                     ;================================================================End