51单片机数字钟汇编程序

1、ORG0000HAJMPMAINORG000BHAJMPTT0ORG001BHAJMPTT1ORG 0030HMAIN:MOV 20H,#00H; 初始化程序MOV21H,#00HMOV22H,#00HMOV23H,#00HMOV24H,#00HMOV25H,#00HMOV26H,#10;MOV27H,#10;熄灭最高两位MOV30H,#00HMOV31H,#00HMOV32H,#00HMOV33H,#00HMOV34H,#00HMOV35H,#00HMOV36H,#10;MOV37H,#10;熄灭最高两位MOVSP,#50HMOVTMOD,#11H;定时器初始化MOVTH0,#3CHMOVT

2、L0,#0B0HMOVTH1,#0D8HMOVTL1,#0F0HMOVIE,#8AH;中断允许SETBTR0;启动定时器0MOVR5,#20MOVR1,#30HMOVR2,#0E0HCLR 2FH.7;设置表示位SFJ1:JNB2FH.7,SFJ2;功能切换键标志位LCALL SFJ24; 调用秒表键盘程序LCALL DISPLAY1; 调用秒表显示程序SJMPSFJ25SFJ2:LCALL DISPLAY ;调用时钟显示子程序SFJ25:LCALL KEY; 调用时钟键盘子程序SJMPSFJ1/* 定时器0 中断 */TT0:PUSHACC;保护现场;启动到时器1PUSHPSWDJNZR5,

3、SFJ5MOVR5,#20INC 20H; 秒加一MOVA,20HCJNEA,#10,SFJ5MOV20H,#00HINC 21HMOVA,21HCJNEA,#6,SFJ5; 判断秒是否加到 60MOV21H,#00H;清零计数单元INC 22H; 分加一MOVA,22HCJNEA,#10,SFJ5MOV22H,#00HINC 23HMOVA,23HCJNEA,#6,SFJ5; 判断分是否加到 60MOV23H,#00H;清零计数单元INC 24HMOVA,25HCJNEA,#2,SFJ3;每到 24 小时就清零MOVA,24H; 计数单元CJNEA,#4,SFJ5;SJMPSFJ4;SFJ3

4、:MOVA,24H;CJNEA,#10,SFJ5;SFJ4:MOV24H,#00HINC 25HMOVA,25HCJNEA,#3,SFJ5MOV25H,#00HSFJ5:MOVTH0,#3CH;定时器赋初值MOVTL0,#0B0HPOPPSW;恢复现场POPACCRETI/* 定时器1 中断 */TT1:PUSHACC;保护现场PUSHPSWINC 30H;1/100 秒加一MOVA,30HCJNEA,#10,SFJ6MOV30H,#00HKEY:MOVA,31HCJNEA,#10,SFJ6MOV31H,#00H;清零计数单元INC 32H; 秒加一MOVA,32HCJNEA,#10,SFJ6

5、MOV32H,#00HINC 33HMOVA,33HCJNEA,#6,SFJ6MOV33H,#00H;清零计数单元INC 34H; 分加一MOVA,34HCJNEA,#10,SFJ6MOV34H,#00HINC 35HMOVA,35HCJNEA,#6,SFJ6MOV35H,#00HMOVTH1,#0D8H;定时器1 赋初值MOVTL1,#0F0HPOPPSW;恢复现场POPACCRETI/* 键盘子程序 */JB P3.1,SFJ7LCALL DELAY1JB P3.1,SFJ7CPL 2FH.7JNB2FH.7,SFJ32MOVTH0,#3CHMOVTL0,#0B0HMOVTH1,#0D8H

6、MOVTL1,#0F0HSETBTR1CLR TR0MOVR1,#30HMOVR2,#0E0HRET;启动 / 停止时钟MOVP1,#0F7HMOVA,P1ANLA,#0F0HCJNEA,#0F0H,SFJ8SFJ6:SFJ7:INC 31HSJMP SFJ15SFJ32: MOV TH0,#3CHMOV TL0,#0B0HMOV TH1,#0D8HMOV TL1,#0F0HSETB TR0CLR TR1MOV R1,#20HMOV R2,#0E0HRETSFJ8:LCALL DELAY1MOV A,P1ANL A,#0F0HCJNE A,#0F0H,SFJ9 ;扫描第一行SJMP SFJ15

7、SFJ9:CJNE A,#70H,SFJ10;扫描秒加一键INC 20HMOV A,20HCJNE A,#10,SFJ31MOV 20H,#00HINC 21HMOV A,21HCJNE A,#6,SFJ31MOV 21H,#00HSJMP SFJ15SFJ10: MOV A,P1;扫描分加一键ANL A,#0F0HCJNE A,#0B0H,SFJ11INC 22HMOV A,22HCJNE A,#10,SFJ31MOV 22H,#00HINC 23HMOV A,23HCJNE A,#6,SFJ31MOV 23H,#00HSJMP SFJ31SFJ11: MOV A,P1;扫描小时加一键ANL

8、A,#0F0HCJNE A,#0D0H,SFJ31INC24HMOV A,25HCJNE A,#2,SFJ12MOV A,24HCJNEA,#4,SFJ31SJMPSFJ13SFJ12:MOVA,24HCJNEA,#10,SFJ31SFJ13:MOV24H,#00HINC 25HMOVA,25HCJNEA,#3,SFJ31MOV25H,#00HSFJ31:RET/* 减法 */SFJ15:MOVP1,#0FBH;扫描第二行MOVA,P1ANLA,#0F0HCJNEA,#0F0H,SFJ16SJMPSFJ23SFJ16:LCALLDELAY1MOVA,P1ANLA,#0F0HCJNEA,#0F0

9、H,SFJ17SJMPSFJ23SFJ17:CJNEA,#70H,SFJ18 ;扫描秒减一键DEC20HMOVA,20HCJNEA,#0FFH,SFJ23MOV20H,#09HDEC21HMOVA,21HCJNEA,#0FFH,SFJ23MOV21H,#05HSJMPSFJ23SFJ18:MOVA,P1;扫描分减一键ANLA,#0F0HCJNEA,#0B0H,SFJ19DEC22HMOVA,22HCJNEA,#0FFH,SFJ23MOV22H,#09HDEC23HMOVA,23HCJNEA,#0FFH,SFJ23MOV23H,#05HSFJ19:MOVA,P1;扫描小时减一ANLA,#0F0H

10、CJNE DECMOV CJNE DECMOVCJNEMOV MOVSJMPSFJ20: MOVSFJ23: RETA,#0D0H,SFJ23 24HA,24HA,#0FFH,SFJ23 25HA,25HA,#0FFH,SFJ20 24H,#03H 25H,#02HSFJ23 24H,#09H;启动 /停止 秒表;清零并停止秒表/* 秒表键盘子程序 */SFJ24: JB P3.3,SFJ26LCALL DELAY1JB P3.3,SFJ26CPL TR1SFJ26: JB P3.2,SFJ27LCALL DELAY1JB P3.2,SFJ27MOV30H,#00HMOV31H,#00HMOV

11、32H,#00HMOV33H,#00HMOV34H,#00HMOV35H,#00HMOV36H,#10HMOV37H,#10HSFJ27:RET/* 时钟显示子程序*/DISPLAY:PUSHACCPUSHPSWSFJ50:MOVP2,R2MOVA,R1MOVDPTR,#TABMOVCA,A+DPTRMOVP0,AACALL DELAYCLR TR1;清零计数单元;熄灭最高两位 ;MOV P0,#0FFHINC R1MOV A,R2CLR CSUBB A,#20HMOV R2,ACJNE R1,#28H,SFJ50MOV R1,#20HPOP PSWPOP ACCRET/* 秒表显示子程序*/DISPLAY1: PUSH ACCPUSHPSWSFJ51:MOVP2,R2MOVA,R1MOVDPTR,#TABMOVCA,A+DPTRMOVP0,AACALL DELAYMOVP0,#0FFHINC R1MOVA,R2CLR CSUBBA,#20HMOVR2,ACJNER1,#38H,SFJ51MOVR1,#30HPOPPSWPOPA