《基于汇编语言编写的数码管显示时钟程序.doc》由会员分享，可在线阅读，更多相关《基于汇编语言编写的数码管显示时钟程序.doc（12页珍藏版）》请在金锄头文库上搜索。
1、如图用汇编语言编写的可调时钟（用定时器定时，不精准），此程序只是提供一个idea操作：最上面的键是开始调整键，后面依次为时分秒的切换键、加键、减键、调整完成键。程序如下：SHI EQU R2FEN EQU R3MIAO EQU R4CHANGE EQU R5ORG 00HLJMP MAINORG 000BH/中断入口LJMP ITORORG 60HMAIN:MOV TMOD,#01H /初始化定时器MOV TH0,#3CHMOV TL0,#0B0H/50mSSETB ET0SETB EACLR F0 /键盘设定标志位MOV R0,#00HMOV R1,#00HMOV P0,#0FFHMOV S
2、HI,#00HMOV FEN,#00HMOV MIAO,#00HMOV CHANGE,#00HSETB TR0/打开定时器M1: LJMP KEY/键盘扫描M2: LCALL INIT /动态显示LJMP M1INIT:MOV A,SHI/显示函数MOV B,#0AHDIV ABMOV 40H,AMOV 41H,B CLR P2.0CLR P2.1CLR P2.2JNB F0,O1CJNE CHANGE,#00H,O1CJNE R1,#0,O1MOV P1,#00HCPL P2.7LCALL DELAYLJMP O10O1:MOV DPTR,#TABLEMOV A,40HMOVC A,A+DP
3、TRMOV P1,ALCALL DELAYMOV P1,#00HO10:CLR P2.0CLR P2.1SETB P2.2JNB F0,O2CJNE CHANGE,#00H,O2CJNE R1,#0,O2MOV P1,#00HLCALL DELAYLJMP O20O2:MOV DPTR,#TABLEMOV A,41HMOVC A,A+DPTRMOV P1,ALCALL DELAYMOV P1,#00HO20:CLR P2.0 /显示小时SETB P2.1CLR P2.2MOV P1,#040HLCALL DELAY /显示分隔符 MOV P1,#00HMOV A,FENMOV B,#0AHDI
4、V ABMOV 40H,AMOV 41H,BCLR P2.0SETB P2.1SETB P2.2JNB F0,O3CJNE CHANGE,#01H,O3CJNE R1,#0,O3MOV P1,#00HLCALL DELAYLJMP O30O3:MOV DPTR,#TABLEMOV A,40HMOVC A,A+DPTRMOV P1,ALCALL DELAYMOV P1,#00HO30:SETB P2.0CLR P2.1CLR P2.2JNB F0,O4CJNE CHANGE,#01H,O4CJNE R1,#0,O4MOV P1,#00HLCALL DELAYLJMP O40O4:MOV DPTR
5、,#TABLEMOV A,41HMOVC A,A+DPTRMOV P1,ALCALL DELAYMOV P1,#00H /显示分钟O40:SETB P2.0CLR P2.1SETB P2.2MOV P1,#040HLCALL DELAY /显示分隔符MOV P1,#00HMOV A,MIAOMOV B,#0AHDIV ABMOV 40H,AMOV 41H,BSETB P2.0SETB P2.1CLR P2.2JNB F0,O5CJNE CHANGE,#02H,O5CJNE R1,#0,O5MOV P1,#00HLCALL DELAYLJMP O50O5:MOV DPTR,#TABLEMOV A
6、,40HMOVC A,A+DPTRMOV P1,ALCALL DELAYMOV P1,#00HO50:SETB P2.0SETB P2.1SETB P2.2JNB F0,O6CJNE CHANGE,#02H,O6CJNE R1,#0,O6MOV P1,#00HLCALL DELAYLJMP O60O6:MOV DPTR,#TABLEMOV A,41HMOVC A,A+DPTRMOV P1,ALCALL DELAYMOV P1,#00H /显示秒O60:RETKEY: MOV A,P0XRL A,#0FFHCJNE A,#00H,A1LJMP M2A1: LCALL DELAY1MOV A,P0
7、XRL A,#0FFHCJNE A,#00H,KEY1LJMP M2KEY1: CJNE A,#80H,KEY2 /按键1、开始键SETB F0/CLR TR0JNB P0.7,$LJMP M2KEY2: CJNE A,#40H,KEY3 /按键2、切换键JNB F0,B1 INC CHANGEMOV A,CHANGECJNE A,#03,B2MOV CHANGE,#00HB1: JNB P0.6,$LJMP M2B2: JNB P0.6,$LJMP M2KEY3: CJNE A,#20H,KEY4 /按键3、加键JNB F0,C1MOV A,CHANGECJNE A,#00,C2INC SH
8、ICJNE SHI,#24,C1MOV SHI,#00H C1: JNB P0.5,$LJMP M2C2: CJNE A,#01,C4INC FENCJNE FEN,#60,C3MOV FEN,#00HC3: JNB P0.5,$LJMP M2C4: INC MIAOCJNE MIAO,#60,C5MOV MIAO,#00HC5: JNB P0.5,$LJMP M2KEY4: CJNE A,#10H,KEY5 /按键4、减键JNB F0,D1MOV A,CHANGECJNE A,#00,D2CJNE SHI,#00H,D0MOV SHI,#24D0:DEC SHID1: JNB P0.4,$L
9、JMP M2D2: CJNE A,#01,D3CJNE FEN,#00H,D00MOV FEN,#60D00:DEC FENJNB P0.4,$LJMP M2D3: CJNE MIAO,#00H,D000MOV MIAO,#60D000:DEC MIAOJNB P0.4,$LJMP M2KEY5: JNB F0,D0000 /按键5、停止键CLR F0 MOV R0,#00HD0000: JNB P0.3,$LJMP M2ITOR:MOV TH0,#3CHMOV TL0,#0B0HINC R0JNB F0,E0CPL P2.6INC 44HMOV A,44HCJNE A,#5,RETURNMO
10、V 44H,#00HLJMP E1E0:CJNE R0,#19,RETURN MOV R0,#00HJB F0,E1 INC MIAOCJNE MIAO,#60,RETURNMOV MIAO,#00HINC FENCJNE FEN,#60,RETURNMOV FEN,#00HINC SHICJNE SHI,#24,RETURNMOV SHI,#00HLJMP RETURNE1: INC R1CJNE R1,#2,RETURNMOV R1,#0RETURN:RETIDELAY: MOV R7,#255DJNZ R7,$RETDELAY1: MOV R6,#115 /10mSDL1: MOV R7,#248DJNZ R7,$DJNZ R6,DL1RETTABLE: DB 3FH,06H,5BH,4FH DB 66H,6DH,7DH,07H DB 7FH,6FH END
