【文章內(nèi)容簡介】 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 INITILE2: MOV L50MS,20 MOV L1MS,00H MOV L250MS,00H MOV SEC,00H MOV MIN,00H MOV HOU,00H MOV A,HOU MOV B,10 DIV AB ADD A,30H 。將BCD嗎轉(zhuǎn)化為ASIIC碼 MOV P0,0C8H 。顯示小時十位 LCALL ENABLE LCALL WRITE2MOV A,B ADD A,30H MOV P0,0C9H 。顯示小時個位 LCALL ENABLE LCALL WRITE2MOV A,3AH MOV P0,0DH 。顯示冒號 LCALL ENABLE LCALL WRITE2MOV A,MIN MOV B,10 DIV AB ADD A,30HMOV P0,0CBH 。顯示分十位 LCALL ENABLE LCALL WRITE2MOV A,B ADD A,30H MOV P0,0CCH 。顯示分個位 LCALL ENABLE LCALL WRITE2MOV A,3AH MOV P0,0CDH 。顯示冒號 LCALL ENABLE LCALL WRITE MOV A,SEC MOV B,10 DIV AB ADD A,30H MOV P0,0CEH 。顯示秒十位 LCALL ENABLE LCALL WRITE2MOV A,B ADD A,30H MOV P0,0CFH 。顯示秒個位 LCALL ENABLE LCALL WRITE2MOV P0,0C0H 。設光標地址 LCALL ENABLE MOV DPTR,TABLE2。寫數(shù)據(jù) LCALL WRITE1 RETENABLE: CLR RS CLR RW CLR E LCALL DELAY SETB E RETWRITE1: MOV R1,00HA1: MOV A,R1 MOVC A,@A+DPTR CALL WRITE2 INC R1 CJNE A,0FEH,A1 。未到字符串末尾繼續(xù) RETWRITE2: MOV P0,A SETB RS CLR RW CLR E CALL DELAY SETB E RETDELAY: MOV R4,05D1: MOV R5,0FFH DJNZ R5,$ DJNZ R4,D1RET TAB: db 0c0h,0f9h,0a4h,0b0h,99h,92h,82h,0f8h db 80h,90h,88h,83h,0c6h,0a1h,86h,8ehTAB1: db 89h,86h,0c7h,0c7h,0c0h TAB2: db 0c6h,88h,0c0hTABLE1: DB 39。WELCOM HERE39。,0FEHTABLE2: DB 39。WELCOME 39。,0FEHTABLE4: DB 39。CAU39。,0FEH TABLE3: DB 30H,31H,32H,33h DB 34H,35H,36H,37H DB 38h,39H,41H,42H DB 43H,44H,45H,46H MAIN0: MOV TMOD,11H MOV IE,8aH MOV TH1, 3cH MOV TL1, 0b0H lcall ks jnz TTM12 MOV 40H,00HNEXT20: MOV A,40H MOV DPH,52H MOV DPL,53H MOVC A,@A+DPTR MOV R2,A JZ STOP ANL A,0FH MOV R1,A MOV A,R2 SWAP A ANL A,0FH JNZ SING CLR TR0 JMPSING: 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 。有鍵跳出 JNZ STOP LJMP NEXT20STOP: CLR TR0 CLR TR1 LJMP MAIN0 TTM12: LCALL K2 MOV A,37H CJNE A,0EH,TTM13 CLR TR1 LCALL DELAY1TTM120: LCALL KS LCALL DELAY1 JZ TTM120 LCALL K2 MOV A,37H CJNE A,0EH,TTM120 SETB TR1 LJMP NEXT20TTM13: CJNE A,0CH,TTM14 MOV A,52H INC A MOV 52H,A MOV A,53H INC A MOV 53H,A MOV A,36H INC A MOV 37H,A LJMP TTM2TTM14: CJNE A,0DH,TTM2 MOV A,52H DEC A MOV 52H,A MOV A,53H DEC A MOV 53H,A