99table.asm

开始时

TCNTA   	EQU 30H 
TCNTB   	EQU 31H 
SEC     	EQU 32H 
KEYCNT  	EQU 33H 
SP1     	BIT P3.5 
        ORG 00H 
        LJMP START 
        	ORG 0BH 
        LJMP INT_T0 
START:  	MOV KEYCNT,#00H 
        MOV SEC,#00H 
        MOV A,SEC 
        MOV B,#10 
        DIV AB 
        MOV DPTR,#TABLE 
        MOVC A,@A+DPTR 
        MOV P0,A 
        MOV A,B 
        MOV DPTR,#TABLE 
        MOVC A,@A+DPTR 
        MOV P2,A 
        MOV TMOD,#02H 
        SETB ET0 
        SETB EA 
WT:     	JB SP1,WT 
        LCALL DELY10MS 
        JB SP1,WT 
        INC KEYCNT 
        MOV A,KEYCNT 
        CJNE A,#01H,KN1 
        SETB TR0 
        MOV TH0,#06H 
        MOV TL0,#06H 
        MOV TCNTA,#00H 
        MOV TCNTB,#00H 
        LJMP DKN 
KN1:    	CJNE A,#02H,KN2 
        CLR TR0 
        LJMP DKN 
KN2:    	CJNE A,#03H,DKN 
        MOV SEC,#00H 
        MOV A,SEC 
        MOV B,#10 
  	    DIV AB 
        MOV DPTR,#TABLE 
        MOVC A,@A+DPTR 
        MOV P0,A 
        MOV A,B 
        MOV DPTR,#TABLE 
        MOVC A,@A+DPTR 
        MOV P2,A 
        MOV KEYCNT,#00H 
DKN:    JNB SP1,$ 
        LJMP WT 
DELY10MS: 
        	MOV R6,#20 
D1:     	MOV R7,#248 
        DJNZ R7,$ 
        DJNZ R6,D1 
        RET 
INT_T0: 
        INC TCNTA 
        MOV A,TCNTA 
        CJNE A,#100,NEXT 
        MOV TCNTA,#00H 
        INC TCNTB 
        MOV A,TCNTB 
        CJNE A,#4,NEXT 
        MOV TCNTB,#00H 
        INC SEC 
        MOV A,SEC 
        CJNE A,#100,DONE 
        MOV SEC,#00H 
DONE:   	MOV A,SEC 
        MOV B,#10 
        DIV AB 
        MOV DPTR,#TABLE 
        MOVC A,@A+DPTR 
        MOV P0,A 
        MOV A,B 
        MOV DPTR,#TABLE 
        MOVC A,@A+DPTR 
        MOV P2,A 
NEXT:   RETI 
TABLE:  DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH 
        END