基于某总汇编语言编写的数码管显示时钟程序Word文档下载推荐.docx

1、 MOV R0,#00H MOV R1,#00H MOV P0,#0FFH MOV SHI,#00H MOV FEN,#00H MOV MIAO,#00H MOV CHANGE,#00H SETB TR0 /打开定时器M1: LJMP KEY /键盘扫描M2: LCALL INIT /动态显示 LJMP M1 INIT: MOV A,SHI /显示函数 MOV B,#0AH DIV AB MOV 40H,A MOV 41H,B CLR P2.0 CLR P2.1 CLR P2.2 JNB F0,O1 CJNE CHANGE,#00H,O1 CJNE R1,#0,O1 MOV P1,#00H C

2、PL P2.7 LCALL DELAY LJMP O10O1: MOV DPTR,#TABLE MOV A,40H MOVC A,A+DPTR MOV P1,AO10: SETB P2.2 JNB F0,O2 CJNE CHANGE,#00H,O2 CJNE R1,#0,O2 LJMP O20O2: MOV DPTR,#TABLE MOV A,41H LCALL DELAY O20: CLR P2.0 /显示小时 SETB P2.1 MOV P1,#040H LCALL DELAY /显示分隔符 MOV A,FEN MOV 41H,B CLR P2.0 JNB F0,O3 CJNE CHANG

3、E,#01H,O3 CJNE R1,#0,O3 LJMP O30O3:O30: SETB P2.0 JNB F0,O4 CJNE CHANGE,#01H,O4 CJNE R1,#0,O4 LJMP O40O4: MOV P1,A LCALL DELAY MOV P1,#00H /显示分钟O40: MOV A,MIAO SETB P2.0 JNB F0,O5 CJNE CHANGE,#02H,O5 CJNE R1,#0,O5 LJMP O50O5:O50: JNB F0,O6 CJNE CHANGE,#02H,O6 CJNE R1,#0,O6 LJMP O60O6: MOV P1,#00H /显

4、示秒O60: RETKEY: MOV A,P0 XRL A,#0FFH CJNE A,#00H,A1 LJMP M2A1: LCALL DELAY1 MOV A,P0 CJNE A,#00H,KEY1KEY1: CJNE A,#80H,KEY2 /按键1、开始键 SETB F0/ CLR TR0 JNB P0.7,$KEY2: CJNE A,#40H,KEY3 /按键2、切换键 JNB F0,B1 INC CHANGE MOV A,CHANGE CJNE A,#03,B2B1: JNB P0.6,$B2:KEY3: CJNE A,#20H,KEY4 /按键3、加键 JNB F0,C1 CJNE

5、 A,#00,C2 INC SHI CJNE SHI,#24,C1 MOV SHI,#00H C1: JNB P0.5,$C2: CJNE A,#01,C4 INC FEN CJNE FEN,#60,C3C3:C4: INC MIAO CJNE MIAO,#60,C5C5:KEY4: CJNE A,#10H,KEY5 /按键4、减键 JNB F0,D1 CJNE A,#00,D2 CJNE SHI,#00H,D0 MOV SHI,#24D0: DEC SHID1: JNB P0.4,$D2: CJNE A,#01,D3 CJNE FEN,#00H,D00 MOV FEN,#60D00: DEC

6、 FEN JNB P0.4,$D3: CJNE MIAO,#00H,D000 MOV MIAO,#60D000: DEC MIAOKEY5: JNB F0,D0000 /按键5、停止键 CLR F0 D0000: JNB P0.3,$ ITOR: MOV TH0,#3CH MOV TL0,#0B0H INC R0 JNB F0,E0 CPL P2.6 INC 44H MOV A,44H CJNE A,#5,RETURN MOV 44H,#00H LJMP E1 E0: CJNE R0,#19,RETURN MOV R0,#00H JB F0,E1 CJNE MIAO,#60,RETURN CJNE FEN,#60,RETURN CJNE SHI,#24,RETURN LJMP RETURNE1: INC R1 CJNE R1,#2,RETURN MOV R1,#0RETURN: RETIDELAY: MOV R7,#255 DJNZ R7,$ RETDELAY1: MOV R6,#115 /10mSDL1: MOV R7,#248 DJNZ R6,DL1 RET TABLE: DB 3FH,06H,5BH,4FH DB 66H,6DH,7DH,07H DB 7FH,6FH END