?。保绦蚪Y(jié)構(gòu)采用主程序和中斷服務(wù)子程序結(jié)構(gòu)．

　?。玻〞r中斷程序

定時器1于方式1,16位,10ms中斷一次

40H10ms計數(shù)單元

41H秒計數(shù)單元

42H分計數(shù)單元

43H時計數(shù)單元

定時方式1為10MS:THX=0ECH,TLX=78H

方式0為10MS: THX=63H,TLX=18H

3．參考程序

;

DISPEQU0DE00H;顯示子程序入口

;

ORG0000H

START:AJMPMAIN

;

ORG001BH;定時器1中斷服

AJMPTINT1;務(wù)程序入口

;

ORG0030H

MAIN:MOVR0,#39H;顯示緩沖區(qū)初始化內(nèi)容來自單片機之家www.dpj100.com

MAIN_0:MOV@R0,#0

INCR0

CJNER0,#44H,#0

MOVTMOD,#10H

MOVIE,#10001000B

MOVTH1,#0ECH;10ms:EC78H

MOVTL1,#78H

SETBTR1

MAIN_1:LCALLDISP;主程序循環(huán)

SJMPMAIN_1

;

;定時器1中斷服務(wù)程序

TINT1:MOVTH1,#0ECH

MOVTL1,#78H

PUSHACC

PUSHPSW

INC40H

MOVA,40H

CJNEA,#100,TINT1R

MOV40H,#0

MOVA,41H;秒單元加1

INCA

DAA

MOV41H,A

CJNEA,#60H,TINT10

MOV41H,#0

MOVA,42H;分單元加1

INCA

DAA

MOV42H,A

CJNEA,#60H,TINT10

MOV42H,#0

MOVA,43H;小時單元加1

INCA

DAA

MOV43H,A

CJNEA,#24H,TINT10

MOV43H,#0

TINT10:MOVA,41H;秒拆字

ANLA,#0FH

MOV39H,A

MOVA,41H

ANLA,#0F0H

SWAPA

MOV3AH,A

MOVA,42H;分拆字

ANLA,#0FH

MOV3BH,A

MOVA,42H

ANLA,#0F0H

SWAPA

MOV3CH,A

MOVA,43H;小時拆字

ANLA,#0FH

MOV3DH,A

MOVA,43H

ANLA,#0F0H

SWAPA

MOV3EH,A

TINT1R:POPPSW

POPACC

RETI