PYE	EQU	P3.3
PYL	EQU	P3.4
RECLED	EQU	P3.2
A67	EQU	P1.6
A4	EQU	P1.4
A0	EQU	P1.0
SERIN	EQU	P2.7
SRCK	EQU	P2.2
SRCLR	EQU	P2.1
G	EQU	P2.0
RCK	EQU	P2.3
R_DATA	EQU 	P2.6
R_CLR	EQU	P2.5
R_CLK	EQU	P2.4
COMMAND	EQU	22H
DISPNUM	EQU	23H
SLNUM	EQU	24H
R_VALID	EQU	00H
SLEND	EQU	01H



	ORG 0000H
	JMP MAIN
	ORG 0023H
	JMP SERIAL
	ORG 0040H
MAIN:	MOV P2,#00000001B
	MOV P1,#0
	MOV SCON,#01010000B
	MOV PCON,#0
	MOV TMOD,#21H
	MOV TH1,#0FDH
	MOV TL1,#0FDH
	SETB TR1
	SETB ES
	SETB EA
	CLR R_VALID
START:	JNB R_VALID,$
	CLR R_VALID
	MOV R1,COMMAND
	CJNE R1,#01H,CON1
	MOV R7,#0FFH
TEMP2:	MOV R6,#250
TEMP1:	MOV A,P3
	MOV B,A
	ORL A,#00111111B
	CJNE A,#0FFH,TEMP0
	DJNZ R6,TEMP1
	DJNZ R7,TEMP2
TEMP0:	MOV A,B
	ANL A,#11000000B
	ORL A,#00001010B
	CLR EA
	MOV SBUF,A
	JNB TI,$
	CLR TI
	MOV SBUF,A
	JNB TI,$
	CLR TI
	SETB EA
	JMP START

CON1:	CJNE R1,#02H,START
	MOV P3,#0FFH
	CLR SLEND
	MOV SLNUM,#0
LOOP2:	
	MOV DPTR,#TAB_SAVE
	MOV A,SLNUM
	MOV B,#96
	MUL AB
	ADD A,DPL
	MOV DPL,A
	CLR A
	ADDC A,DPH
	MOV DPH,A
	SETB A67
	SETB A4
	CLR A4
	NOP
	NOP
	SETB A4
	MOV A,SLNUM
	JZ CON3
	SETB A0
	CLR PYE
	SETB PYE
	JB RECLED,$
	JNB RECLED,$
	CLR A0		;定位在第二段開(kāi)始放
CON3:	MOV DISPNUM,#0
	CLR PYE
	SETB PYE
	SETB SERIN
	CLR SRCLR
	SETB SRCLR
LOOP1:	CALL DISPLAY
	MOV TH0,#0FFH
	MOV TL0,#0
	SETB TR0
CON6:	JB RECLED,CON4
	SETB G
	JNB RECLED,$
	JB SLEND,CON5
	INC SLNUM
	MOV A,SLNUM
	ANL A,#01H
	MOV SLNUM,A
	CLR TR0		;繼續(xù)另一段
	MOV R6,#0FFH
LOOP11:	MOV R7,#0FFH
LOOP22:	NOP
	NOP
	NOP
	DJNZ R7,LOOP22
	DJNZ R6,LOOP11
	JMP LOOP2
CON5:	CLR TR0
	CLR SLEND
	SETB G
	JMP START
CON4:	JNB TF0,CON6
	CLR TF0
	CLR TR0
	JMP LOOP1

DISPLAY:SETB G
	CLR SRCK
	SETB SRCK
	CLR SRCK
	CLR RCK
	SETB RCK
	CLR RCK
	CLR R_CLR
	SETB R_CLR
	CLR A
	MOVC A,@A+DPTR
	MOV R1,#8
LOOP3:	RLC A
	MOV R_DATA,C
	CLR R_CLK
	SETB R_CLK
	CLR R_CLK
	DJNZ R1,LOOP3
	INC DPTR
	CLR A
	MOVC A,@A+DPTR
	MOV R1,#8
LOOP4:	RLC A
	MOV R_DATA,C
	CLR R_CLK
	SETB R_CLK
	CLR R_CLK
	DJNZ R1,LOOP4
	INC DPTR
	CLR SERIN
	INC DISPNUM
	MOV A,DISPNUM
	CJNE A,#48,LOOP5
LOOP5:	JC LOOP6
	MOV DISPNUM,#0
	SETB SERIN
	MOV A,DPL
	CLR C
	SUBB A,#96
	MOV DPL,A
	MOV A,DPH
	SUBB A,#0
	MOV DPH,A
LOOP6:	CLR G
	RET

TAB_SAVE:
DB 00H,00H,08H,10H,28H,90H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
TABLE1:
DB 01H,01H,01H,01H,01H,01H,01H,01H
DB 01H,01H,01H,01H,01H,01H,01H,01H
DB 01H,01H,01H,01H,01H,01H,01H,01H
DB 01H,01H,01H,01H,01H,01H,01H,01H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H
DB 55H,55H,55H,55H,55H,55H,55H,55H


SERIAL:
	CLR EA
	PUSH ACC
	CLR RI
	MOV A,SBUF
	MOV B,A
	SWAP A
	ORL A,B
	CPL A
	JNZ SER_ERR
	MOV A,B
	ANL A,#00001111B
	MOV COMMAND,A
	CJNE A,#03H,SER_CON1
	SETB SLEND
SER_CON1:
	SETB R_VALID
	MOV SBUF,#55H
	JNB TI,$	;數(shù)據(jù)接受認(rèn)可標(biāo)志
	CLR TI
SER_CON2:
	POP ACC
	SETB EA
	RETI
SER_ERR:
	MOV SBUF,#0AAH
	JNB TI,$	;；數(shù)據(jù)有錯(cuò)重發(fā)標(biāo)志
	CLR TI
	JMP SER_CON2
	END