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ORG 0000H ;復(fù)位處
AJMP MAIN ;短跳轉(zhuǎn)至MAIN也就0100H地址處
ORG 0100H
MAIN: MOV P2,#00H ;P2.7-P2.0置0
KEY0: MOV P3,#0FEH ;P3.7-P3.1置1，P3.0置0
JNB P3.4,K1 ;P3.4為0則跳轉(zhuǎn)至K1處
JNB P3.5,K2
JNB P3.6,K3
MOV P3,#0FDH
JNB P3.4,K4
JNB P3.5,K5
JNB P3.6,K6
MOV P3,#0FBH
JNB P3.4,K7
JNB P3.5,K8
JNB P3.6,K9
AJMP KEY0
K1: MOV P0,#0F9H ;P0=1111 1001B
ACALL YSH1S ;短調(diào)用，延時(shí)
AJMP KEY0 ;短跳轉(zhuǎn)回KEY0，差不多就是C的While(1)
RET ;這里是跑飛拉回
K2: MOV P0,#0A4H
ACALL YSH1S
AJMP KEY0
RET
K3: MOV P0,#0B0H
ACALL YSH1S
AJMP KEY0
RET
K4: MOV P0,#099H
ACALL YSH1S
AJMP KEY0
RET
K5: MOV P0,#092H
ACALL YSH1S
AJMP KEY0
RET
K6: MOV P0,#082H
ACALL YSH1S
AJMP KEY0
RET
K7: MOV P0,#0F8H
ACALL YSH1S
AJMP KEY0
RET
K8: MOV P0,#080H
ACALL YSH1S
AJMP KEY0
RET
K9: MOV P0,#090H
ACALL YSH1S
AJMP KEY0
RET
YSH1S: MOV R3,#10
LOOP: MOV R4,#200
LOOP1: MOV R5,#230
DJNZ R5,$ ;R5內(nèi)容減1 不為0返回本行繼續(xù)執(zhí)行 為0就向下執(zhí)行
DJNZ R4,LOOP1 ;就是循環(huán)等待
DJNZ R3,LOOP
RET
END |
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