multifunction-key.asm

8951系列单片机仿真。包括流水灯、数码管、定时器、点阵、液晶等

ID				EQU 30H 
SP1				BIT P3.7 
L1				BIT P1.0 
L2				BIT P1.1 
L3				BIT P1.2 
L4				BIT P1.3 
				ORG 0 
				MOV ID,#00H 
START:			JB K1,REL 
				LCALL DELAY10MS 
				JB K1,REL 
				INC ID 
				MOV A,ID 
				CJNE A,#04,REL 
				MOV ID,#00H 
REL:			JNB K1,$ 
				MOV A,ID 
				CJNE A,#00H,IS0 
				CPL L1 
				LCALL DELAY 
				SJMP START 
IS0:				CJNE A,#01H,IS1 
				CPL L2 
				LCALL DELAY 
				SJMP START 
IS1:				CJNE A,#02H,IS2 
				CPL L3 
				LCALL DELAY 
				SJMP START 
IS2:				CJNE A,#03H,IS3 
				CPL L4 
				LCALL DELAY 
				SJMP START 
IS3:				LJMP START 
DELAY10MS:	MOV R6,#20 
LOOP1:			MOV R7,#248 
				DJNZ R7,$ 
				DJNZ R6,LOOP1 
				RET 
DELAY:			MOV R5,#20 
LOOP2:			LCALL DELAY10MS 
				DJNZ R5,LOOP2 
				RET 
				END