led.asm

单片机开发板源程序 适合初学者 第五部分 报警产生器

	ORG 0
START:	MOV DPTR,#TABLE
LOOP:	CLR A
	MOVC A,@A+DPTR
	CJNE A,#01H,LOOP1
	SJMP START
LOOP1:	MOV P0,A
	MOV R3,#20
	LCALL DELAY
	INC DPTR
	SJMP LOOP
DELAY:	MOV R4,#20
D1:	MOV R5,#248
	DJNZ R5,$
	DJNZ R4,D1
	DJNZ R3,DELAY
	RET
TABLE:	DB 0FEH,0FDH,0FBH,0F7H
	DB 0EFH,0DFH,0BFH,07FH
	DB 0FEH,0FDH,0FBH,0F7H
	DB 0EFH,0DFH,0BFH,07FH		
	DB 07FH,0BFH,0DFH,0EFH
	DB 0F7H,0FBH,0FDH,0FEH
	DB 07FH,0BFH,0DFH,0EFH
	DB 0F7H,0FBH,0FDH,0FEH
	DB 00H, 0FFH,00H, 0FFH
	DB 01H
	END