数码秒表.txt

数码表（汇编）

                   MIAO EQU 40H
		   FEN  EQU 41H
		   MIAOGEWEI EQU 42H
		   MIAOSHIWEI EQU 43H
		   FENGEWEI EQU 44H
		   FENSHIWEI EQU 45H
		   ORG 0000H
		   SJMP START
		   ORG 000BH
		   AJMP TIMER0
		   ORG 0030H
START:
                   MOV SP,#60H
		   MOV MIAO,#0
		   MOV FEN,#0
		   MOV DPTR,#TAB
		   MOV 30H,#0
		   MOV TH0,#3CH
		   MOV TL0,#0B0H
		   MOV TMOD,#01H
		   MOV IE,#82H
		   SETB TR0
MAIN:
                   CALL PROCESS
		   CALL DISPLAY
                   SJMP MAIN
PROCESS:
                   MOV A,MIAO
		   MOV B,#10
		   DIV AB
		   MOV MIAOSHIWEI,A
		   MOV MIAOGEWEI,B
		   MOV A,FEN
		   MOV B,#10
		   DIV AB
		   MOV FENSHIWEI,A
		   MOV FENGEWEI,B
		   RET
DISPLAY:

                   MOV A,FENSHIWEI
		   MOVC A,@A+DPTR
                   SETB P2.0
		   MOV P0,A
		   CALL DELAY
		   CLR P2.0
                  

                   MOV A,FENGEWEI
		   MOVC A,@A+DPTR
                   SETB P2.1
                   MOV P0,A
		   CALL DELAY
		   CLR P2.1
                  

                   MOV A,MIAOSHIWEI
		   MOVC A,@A+DPTR
                   SETB P2.2
		   MOV P0,A
		   CALL DELAY
		   CLR P2.2
             

                   MOV A,MIAOGEWEI
		   MOVC A,@A+DPTR
                   SETB P2.3
		   MOV P0,A
		   CALL DELAY
		   CLR P2.3
		   RET
TIMER0:
                   CLR TF0
                   PUSH A
		   INC 30H
		   MOV A,30H
		   CJNE A,#20,JIXU
		   MOV 30H,#0
		   INC MIAO
		   MOV A,MIAO
		   CJNE A,#60,JIXU
		   MOV MIAO,#0
		   INC FEN
		   MOV A,FEN
		   CJNE A,#60,JIXU
		   MOV FEN,#0
JIXU:
                   POP A
		   MOV TH0,#3CH
		   MOV TL0,#0B0H
		   RETI
DELAY:
          MOV R0,#50
D2:
          MOV R1,#10
D1:
          DJNZ R1,D1
		  DJNZ R0,D2
		  RET
TAB:
    DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H
END