【正文】 MOV 53H,LOW TABLE10 LCALL INITILE2 lcall MAIN0A11: CJNE A,02H,A22 LCALL MODD MOV 52H,HIGH TABLE20 MOV 53H,LOW TABLE20 LCALL INITILE2 lcall MAIN0A22: CJNE A,03H,A33 LCALL MODD MOV 52H,HIGH TABLE30 MOV 53H,LOW TABLE30 LCALL INITILE2 lcall MAIN0 A33: CJNE A,04H,A44 LCALL MODD MOV 52H,HIGH TABLE40 MOV 53H,LOW TABLE40 LCALL INITILE2 lcall MAIN0A44: CJNE A,05H,A55 LCALL MODD MOV 52H,HIGH TABLE50 MOV 53H,LOW TABLE50 LCALL INITILE2 lcall MAIN0A55: CJNE A,06H,A66 LCALL MODD MOV 52H,HIGH TABLE60 MOV 53H,LOW TABLE60 LCALL INITILE2 lcall MAIN0 A66: CJNE A,07H,A77 LCALL MODD MOV 52H,HIGH TABLE70 MOV 53H,LOW TABLE70 LCALL INITILE2 lcall MAIN0 A77: CJNE A,08H,A88 LCALL MODD MOV 52H,HIGH TABLE80 MOV 53H,LOW TABLE80 LCALL INITILE2 lcall MAIN0A88: CJNE A,09H,A99 LCALL MODD MOV 52H,HIGH TABLE90 MOV 53H,LOW TABLE90 LCALL INITILE2 lcall MAIN0 A99: CJNE A,0AH,AAA LCALL MODD MOV 52H,HIGH TABLE100 MOV 53H,LOW TABLE100 LCALL INITILE2 lcall MAIN0 AAA: RET 。將BCD嗎轉(zhuǎn)化為ASIIC碼 MOV P0,0C8H 。顯示小時個位 CALL ENABLE CALL WRITE2 MOV A,3AH MOV P0,0DH 。顯示分十位 CALL ENABLE CALL WRITE2 MOV A,B ADD A,30H MOV P0,0CCH 。顯示冒號 CALL ENABLE CALL WRITE2 MOV A,SEC MOV B,10 DIV AB ADD A,30H MOV P0,0CEH 。顯示秒個位 CALL ENABLE CALL WRITE2 MOV P0,0C0H 。寫數(shù)據(jù) CALL WRITE1 RET。**********************************************寫數(shù)據(jù)WRITE1: MOV R1,00HA1: MOV A,R1 MOVC A,A+DPTR CALL WRITE2 INC R1 CJNE A,0FEH,A1 。**********************************************DELAY: MOV R4,05D1: MOV R5,0FFH DJNZ R5,$ DJNZ R4,D1 RET 。WELCOM HERE39。DFF WB 39。CAU39。MAIN0: MOV TMOD,11H MOV IE,8aH 。MOV TL1, 0b0H lcall ks jnz TTM12 MOV 40H,00H。SING: DEC A MOV 22H,A RL A MOV DPTR,TABLE00 MOVC A,A+DPTR MOV TH0,A MOV 21H,A MOV A,22H RL A INC A MOVC A,A+DPTR MOV TL0,A MOV 20H,A SETB TR0 SETB TR1W1: LCALL DELAY30 INC 40H LCALL KS 。STOP: CLR TR0 CLR TR1 LJMP MAIN0 。 TTM2: RET。定時器中斷子程序0。***************************************************。***************************************************T1INT: MOV TH1, 3cH MOV TL1, 0b0H DJNZ L50MS,X4 MOV L50MS,20 。顯示秒十位 CALL ENABLE CALL WRITE2 MOV A,B ADD A,30H MOV P0,0CFH 。*************************************每分鐘刷新分顯示一次 MOV A,MIN INC A MOV MIN,A MOV B,10 DIV AB ADD A,30H MOV P0,0CBH 。顯示分個位 CALL ENABLE CALL WRITE2 MOV A,MIN MOV B,3 MUL AB MOV B,100 DIV AB MOV R2,A MOV A,10 XCH A,B DIV AB MOV A,MIN XRL A,60 JNZ OUTHOUSET: MOV MIN,00H 。將BCD嗎轉(zhuǎn)化為ASIIC碼 MOV P0,0C8H 。顯示小時個位 CALL ENABLE CALL WRITE2 MOV A,HOU INC A MOV HOU,A XRL A,10 JNZ OUT SJMP OVERFLOWOUT: RETI。DELAY30: MOV R7,2W2: MOV R4,125W3: MOV R3,248 DJNZ R3,$ DJNZ R4,W3 DJNZ R7,W2 DJNZ R1,DELAY30 RET。TABLE10: DB 66H,52H,36H,22H,12H,12H,