风扇控制器汇编程序.doc

风扇控制器汇编程序
ORG 0000H
SJMP MAIN
ORG 0003H
LJMP INT
ORG 001BH
SJMP SERVE
;-----------------------------------------------------------
MAIN:SETB ;风扇初始状态为弱档 CLR
CLR
MOV 7EH,#10H
MOV 7FH,#10H
MOV TMOD,#10H ;初始化定时器1
MOV 20H,#00H ;20H存储分钟数,初值为0 MOV 21H,#00H ;21H装秒数值
MOV 22H,#0AH
MOV TH1,#3CH ;设置定时器初值,定时100ms MOV TL1,#0B0H
SETB EA ;开中断,但未启动定时器1 SETB ET1
SETB EX0
SETB IT0
MM:LCALL KAIGUAN ;循环调用开关程序和显示程序 LCALL DISPLAY
LCALL STOP
SJMP MM
;-------------------
SERVE:MOV TH1,#3CH
MOV TL1,#0B0H
DJNZ 22H,RETURN
MOV 22H,#0AH
DEC 21H
MOV A,21H
INC A
JNZ RETURN
MOV 21H,#3BH
DEC 20H
MOV A,20H
INC A
JNZ RETURN ;定时器中断服务程序;定时器中断服务程序
LCALL SHIJIANDAO
SJMP RETURN
SHIJIANDAO:CLR
CLR
CLR
MOV DPTR,#0FF21H
MOV A,#00H
SS:MOVX ***@DPTR,A
SJMP SS
RET
RETURN:RETI
;------------------------------------------------------------
INT:CLR TR1 ;关定时器1 CLR C
MOV A,20H ;外中断0中断服务程序 CJNE A,#6DH,NEXT1
NEXT1:JC NEXT
SJMP RETURN1
NEXT:MOV R1,20H
MOV A,#0AH
ADD A,20H
CJNE A,#6DH,NEXT2
NEXT2:JC NEXT3
MOV 20H,R1
SJMP RETURN1
NEXT3:MOV 20H,A
RETURN1:SETB TR1 ;开定时器1 RETI
;-----------------------------------------------------------
KAIGUAN:JB ,WEAK ;开关量控制强中弱三档 JB ,MID
JB ,STR
SJMP RETURN2
WEAK:SETB
CLR
CLR
SJMP RETURN2
MID:SETB
CLR