TEN1:JNB P0.2,TENA
MOV A,HOUR ADD A,#01 DA A
MOV HOUR,A CJNE A,#24H,TENA MOV HOUR,#0 TENA:RETI
;******************预置日期 DATE:JNB P0.3,TEN3
MOV A,MONTH
06 电气工程及其自动化 2 班
许伟敏
4
19
单片微型计算机课程设计
基于汇编语言的电子数字钟
源程序集合及注释
ADD A,#01 DA A
MOV MONTH,A CJNE A,#13H,TENB MOV MONTH,#1 SJMP TENB TEN3:JNB P0.2,TEN4
MOV A,YEAR ADD A,#01 DA A
MOV YEAR,A SJMP TENB TEN4:JNB P0.4,TENB
MOV A,DAY ADD A,#01 DA A MOV DAY,A
;***************判断平闰年
MOV A,MONTH CJNE A,#02H,TEN6 MOV A,YEAR ANL A,#0F0H SWAP A MOV B,#10 MUL AB MOV 24H,A MOV A,YEAR ANL A,#0FH ADD A,24H JB ACC.0,TEN5 JB ACC.1,TEN5 MOV A,DAY CJNE A,#30H,TENB MOV DAY,#1 SJMP TENB TEN5:MOV A,DAY
CJNE A,#29H,TENB MOV DAY,#1 SJMP TENB ;**************判断大小月 TEN6:CJNE A,#08H,TEN7 TEN7:JC TEN9
JB 18H,TEN8 MOV A,DAY CJNE A,#32H,TENB MOV DAY,#1 SJMP TENB
TEN8:MOV A,DAY
CJNE A,#31H,TENB MOV DAY,#1 SJMP TENB TEN9:JNB 18H,TEN10
MOV A,DAY CJNE A,#32H,TENB MOV DAY,#1 SJMP TENB TEN10:MOV A,DAY
CJNE A,#31H,TENB MOV DAY,#1
06 电气工程及其自动化 2 班
许伟敏
4
20
单片微型计算机课程设计
基于汇编语言的电子数字钟
源程序集合及注释
TENB: RETI
;**************************预置闹铃时间 RTIME:JNB P0.3,TEN12
MOV A,RM ADD A,#01 DA A MOV RM,A CJNE A,#60H,TENC MOV RM,#0 SJMP TENC TEN12:JNB P0.2,TENC
MOV A,RH ADD A,#01 DA A MOV RH,A CJNE A,#24H,TENC MOV RH,#0 TENC:RETI
;************************预置生日日期 BDATE:JNB P0.3,TEN14
MOV A,BD ADD A,#01 DA A MOV BD,A MOV A,BM
CJNE A,#02H,TEN15 MOV A,BD
CJNE A,#30H,TEND MOV BD,#1 SJMP TEND
TEN15:CJNE A,#08H,TEN16 TEN16:JC TEN18
JB 18H,TEN17 MOV A,BD
CJNE A,#32H,TEND MOV BD,#1 SJMP TEND TEN17:MOV A,BD
CJNE A,#31H,TEND MOV BD,#1 SJMP TEND TEN18:JNB 18H,TEN19
MOV A,BD
CJNE A,#32H,TEND MOV BD,#1 SJMP TEND TEN19:MOV A,BD
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