📄 sz613.asm
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LED1 BIT p1.3 ;4位数码管选通引脚
LED2 BIT p1.4
LED3 BIT p1.6
LED4 BIT p1.7
LED2DZ BIT P1.5 ;小数点
LS164_AB BIT p3.0 ;74LS164数据线
LS164_CLK BIT p3.1 ;74LS164时钟线
KEY1 BIT p3.5 ;按键1
KEY2 BIT p3.7 ;按键2
DISPFLAG EQU 40H ;显示标识
DISPBUF EQU 20H
BEEP BIT p1.0
MSCNT EQU 30H ;中断次数
SECONDBUF EQU 31H
MINUTEBUF EQU 32H
HOURBUF EQU 33H
MONTHBUF EQU 34H
DAYBUF EQU 35H
ORG 0000h
JMP START
ORG 000Bh
JMP TIMER0
ORG 0100H
START:
MOV SP,#50H
CLR LED2DZ
CLRDISPBUF: ; 清显示缓冲区
MOV R2,#0FH
MOV R0,#DISPBUF+1
CLRDISPBUFLOOP:
MOV @R0,#0H
INC R0
DJNZ R2,CLRDISPBUFLOOP
MOV DISPFLAG,#0;初始时显示"时,分"
CLR LS164_AB
CLR LS164_CLK
MOV TMOD,#01H ; 方式1
MOV TH0,#0H ;初值
MOV TL0,#0H
MOV MSCNT,#15H
SETB EA
SETB ET0
SETB TR0
LOOP:
LCALL DISP
AJMP LOOP
TIMER0:
PUSH PSW
PUSH ACC
SETB PSW.3
MOV TH0,#0H
MOV TL0,#0H
MOV A,MSCNT
DEC A
MOV MSCNT,A
JNZ RET1
; 微调
CLR EA
MOV TH0,#0BH
MOV TL0,#0DCH
SETB EA
MOV MSCNT,#14
; 秒走
MOV A, SECONDBUF
CJNE A, #59,SADD1
MOV SECONDBUF, #0
; 分走
MOV A, MINUTEBUF
CJNE A, #59,MADD1
MOV MINUTEBUF, #0
; 小时走
MOV A, HOURBUF
CJNE A, #23,HADD1
MOV HOURBUF, #0
; MOV A, DAYBUF
; CJNE A, #31,HADD1
; MOV DAYBUF, #0
AJMP RET1
SADD1: ; 秒加1
INC SECONDBUF
AJMP RET1
MADD1: ; 分加1
INC MINUTEBUF
AJMP RET1
HADD1: ; 小时加1
INC HOURBUF
RET1: LCALL KEYINPUT
POP ACC
POP PSW
RETI
; 74LS164芯片工作原理程序
Send74LS164:
MOV R1,#8
Send2LS164_Loop:
RLC A
MOV LS164_AB,C
SETB LS164_CLK
CLR LS164_CLK
DJNZ r1,Send2LS164_Loop
RET
KEYINPUT:
JB F0,K1RET
K1: JB KEY1,K2
LCALL DELAY10MS
JB KEY1,K2
LCALL DELAY10MS
MOV A,DISPFLAG
CJNE A,#1,CLRSECONDBUF
AJMP KEYRET
CJNE A,#2,DISPFLAGADD
CLRSECONDBUF:
MOV SECONDBUF,#0
DISPFLAGADD:
ADD A,#3
MOV DISPFLAG,A
SETB F0
WAIT: JNB KEY1,WAIT
CJNE A,#0FH,KEYRET
MOV DISPFLAG,#0
CLR F0
K1RET:
JMP KEYRET
K2:
JB KEY2,KEYRET
LCALL DELAY10US
JB KEY2,KEYRET
LCALL DELAY10US
MOV A,DISPFLAG
MONADD1: ; 月加1
CJNE A,#3,DAYADD1
MOV R5, MONTHBUF
CJNE R5,#12,MONADD
MOV MONTHBUF,#1
AJMP KEYRET
MONADD:
INC MONTHBUF
AJMP KEYRET
DAYADD1: ; 日加1
CJNE A,#6,HOURADD1
MOV R5,DAYBUF
CJNE R5,#31,DAYADD
MOV DAYBUF,#1
AJMP KEYRET
DAYADD:
INC DAYBUF
AJMP KEYRET
HOURADD1: ; 小时加1
CJNE A,#9,MINADD1
MOV R5,HOURBUF
CJNE R5,#23,HOURADD
MOV HOURBUF,#0
AJMP KEYRET
HOURADD:
INC HOURBUF
AJMP KEYRET
MINADD1: ; 分钟加1
CJNE A,#0CH,K2X
MOV R5,MINUTEBUF
CJNE R5,#59,MINADD
MOV MINUTEBUF,#0
AJMP KEYRET
MINADD:
INC MINUTEBUF
AJMP KEYRET
K2X: ; 显示日期和秒
ADD A,#1
CJNE A,#3,KEYRET
MOV DISPFLAG,#0
MOV DISPFLAG,A
KEYRET:
RET
;显示程序
DISP:
MOV R1,#DISPFLAG
LCALL UPDATEDISPBUF
;初始显示 "时间"
KF0: CJNE @R1,#0,KF1
MOV R0,#DISPBUF+1
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED4
LCALL DELAY10MS
MOV R0,#DISPBUF+2
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED3
LCALL DELAY10MS
MOV R0,#DISPBUF+3
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED2
LCALL DELAY10MS
MOV R0,#DISPBUF+4
LCALL GET_LED1
LCALL Send74LS164
LCALL SELECT_LED1
LCALL DELAY10MS
AJMP KFRET
;显示 "日期"
KF1: CJNE @R1,#1,KF2
MOV R0,#DISPBUF+5
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED4
LCALL DELAY10MS
MOV R0,#DISPBUF+6
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED3
LCALL DELAY10MS
MOV R0,#DISPBUF+7
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED2
LCALL DELAY10MS
MOV R0,#DISPBUF+8
LCALL GET_LED1
LCALL Send74LS164
LCALL SELECT_LED1
LCALL DELAY10MS
AJMP KFRET
;显示 "秒"
KF2: CJNE @R1,#2,KF3
MOV R0,#DISPBUF+9
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED4
LCALL DELAY10MS
MOV R0,#DISPBUF+0AH
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED3
LCALL DELAY10MS
AJMP KFRET
;显示 "月"
KF3: CJNE @R1,#3,KF6
MOV R0,#DISPBUF+7
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED2
LCALL DELAY10MS
MOV R0,#DISPBUF+8
LCALL GET_LED1
LCALL Send74LS164
LCALL SELECT_LED1
LCALL DELAY10MS
AJMP KFRET
;显示 "日"
KF6: CJNE @R1,#6,KF9
MOV R0,#DISPBUF+5
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED4
LCALL DELAY10MS
MOV R0,#DISPBUF+6
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED3
LCALL DELAY10MS
AJMP KFRET
;显示 "小时"
KF9: CJNE @R1,#9,KFC
MOV R0,#DISPBUF+3
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED2
LCALL DELAY10MS
MOV R0,#DISPBUF+4
LCALL GET_LED1
LCALL Send74LS164
LCALL SELECT_LED1
LCALL DELAY10MS
AJMP KFRET
;显示 "分"
KFC: CJNE @R1,#0CH,KFRET
MOV R0,#DISPBUF+1
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED4
LCALL DELAY10MS
MOV R0,#DISPBUF+2
LCALL GET_LED234
LCALL Send74LS164
LCALL SELECT_LED3
LCALL DELAY10MS
KFRET:
RET
UPDATEDISPBUF: ;1秒钟重新为 "秒，分，小时" 重新填显示缓冲
MOV A, SECONDBUF
MOV B, #10
DIV AB
MOV DISPBUF+9, B
MOV DISPBUF+0AH, A
MOV A, MINUTEBUF
MOV B, #10
DIV AB
MOV DISPBUF+1, B
MOV DISPBUF+2, A
MOV A, HOURBUF
MOV B, #10
DIV AB
MOV DISPBUF+3, B
MOV DISPBUF+4, A
MOV A, MONTHBUF
MOV B, #10
DIV AB
MOV DISPBUF+7, B
MOV DISPBUF+8, A
MOV A, DAYBUF
MOV B, #10
DIV AB
MOV DISPBUF+5, B
MOV DISPBUF+6, A
RET
SELECT_LED1:;选通数码管1
CLR LED1
SETB LED2
SETB LED3
SETB LED4
RET
SELECT_LED2:;选通数码管1
CLR LED2
SETB LED1
SETB LED3
SETB LED4
RET
SELECT_LED3:;选通数码管1
CLR LED3
SETB LED1
SETB LED2
SETB LED4
RET
SELECT_LED4:;选通数码管1
CLR LED4
SETB LED1
SETB LED2
SETB LED3
RET
GET_LED234:
MOV DPTR,#SAG_LED234
MOV A,@R0
MOVC A,@A+DPTR
RET
GET_LED1:
MOV DPTR,#SAG_LED1
MOV A,@R0
MOVC A,@A+DPTR
RET
DELAY10MS: ;延时10毫秒
MOV R7,#10
D53: MOV R6,#200
D54:
NOP
NOP
NOP
NOP
NOP
DJNZ R6,D54
DJNZ R7,D53
RET
DELAY10US:
MOV R7,#5
DJNZ R7,$
RET
SAG_LED1: ;LED1段码
DB 01010000b,11111001b,00110100b,10110000b,10011001b,10010010b,00010010b,11111000b,00010000b,10010000b,0ffh
SAG_LED234: ;LED234段码
DB 11000000b,11111001b,10100100b,10110000b,10011001b,10010010b,10000010b,11111000b,10000000b,10010000b,0ffh
; 0 1 2 3 4 5 6 7 8 9
TABLE_extra:
DB 11111110B,11111101B,11111011B,11110111B,11101111B,11011111B,10111111B,0h,0ffh,0ffh,0ffh
END
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