单片机电路板设计实习 - 图文(5)

SETB ET0 CLR PT0 CLR PT1 SETB PX1 SETB IT1 MOV P0,#0FFH CLR TR0 CLR TR1 CLR 7FH

ML1: ACALL DISP

START: JB P1.0,L1 ACALL DELAY10 JB P1.0,L1 JNB P1.0,$ LJMP STOP

L1: JB P1.1,L2 ACALL DELAY10 JB P1.1,L2 JNB P1.1,$ LJMP FUWEI

L2: JB P1.2,L3 ACALL DELAY10 JB P1.2,L3 JNB P1.2,$ LJMP KJIA

L3: JB P1.3,L4 ACALL DELAY10 JB P1.3,L4 JNB P1.3,$ LJMP JISHU

L4: JB P1.4,L

; P1.0=0,暂停 ; P1.1=0,复位 ; P1.2=0,快加 ; P1.3=0,计数 ; P1.4=0,翻页14

ACALL DELAY10 JB P1.4,L JNB P1.4,$ LJMP FANYE L: SJMP HERE

STOP: CLR TR0 ;暂停程序 CLR TR1 ACALL DISP SJMP HERE

JISHU : MOV A,20H MOV @R1,A INC R1 DJNZ 50H,HERE MOV R1,#41H MOV 50H,#04H SJMP STOP

FANYE: MOV A,@R1 MOV 20H,A MOV B,#0AH DIV AB MOV 31H,A MOV 30H,B LCALL DISP DEC R1 DJNZ 50H,HERE MOV R1,#44H MOV 50H,#04H SJMP HERE

FUWEI: CLR TR0 CLR TR1 MOV 30H,#00H

;计数程序 ;翻页程序 ;复位程序 15

MOV 31H,#00H MOV 20H,#00H SJMP HERE

KJIA: SETB TR1 ;快加程序 CLR TR0

HEE: JNB TF1,HEE CLR TF1 ACALL JIA1 ACALL DISP JNB P1.0,STOP SJMP HEE

HERE: LJMP ML1

ZHDUAN: SETB TR0 ;启动定时器0 CLR TR1 RETI

TIME1: PUSH ACC ;定时1秒 PUSH PSW MOV TH0,#0D8H MOV TL0,#0F0H DJNZ 40H,RET0 LCALL JIA1 LCALL DISP MOV 40H,#100

RET0: POP PSW POP ACC RETI

TIME10: PUSH ACC ;定时10毫秒 PUSH PSW MOV TH0,#0D8H MOV TL0,#0F0H

RET1: POP PSW

16

POP ACC RETI

JIA1: MOV A,20H ;加1程序 CLR C INC A

CJNE A,#100,GO1 MOV 20H,#00H RET

GO1: MOV 20H,A MOV B,#0AH DIV AB MOV 31H,A MOV 30H,B RET

DISP: MOV R0,#30H MOV R3,#0BFH MOV A,R3

PLAY: MOV P2,A MOV A,@R0

MOV DPTR,#DSEG1 MOVC A,@A+DPTR MOV P0,A LCALL DL1 MOV P2,#0FFH MOV A,R3 RL A JNB ACC.2,LD1 INC R0 MOV R3,A LJMP PLAY LD1: RET

;显示程序 17

DL1: MOV R7,#02 DL: MOV R6,#248 DJNZ R6,$ DJNZ R7,DL RET

DELAY10: MOV R4,#14H ;延时10毫秒 DL00: MOV R5,#0FFH DL11: DJNZ R5,DL11 DJNZ R4,DL00 RET

DSEG1:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H END

附录2

图1 电路总图

18

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