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Switch 的代码
multi switch.lst
A51 MACRO ASSEMBLER MULTI_SWITCH 07/24/2006 08:19:33 PAGE 1
MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN Multi Switch.OBJ
ASSEM
multi switch.opt
### uVision2 Project, (C) Keil Software
### Do not modify !
cExt (*.c)
aExt (*.s*; *.src; *.a*)
oExt (*.obj)
lExt (*.lib)
tExt (*.txt; *.h; *.inc)
pExt (*.plm)
CppX (*.cpp)
DaveTm {
multi switch.hex
:09000000E590C444F0F59080F78E
:00000001FF
switch lamp.asm
ORG 00H
START: JB P1.7,LIG ;如果开关闭合,则点亮LED
CLR P1.0 ;否则熄灭LED
SJMP START
LIG: SETB P1.0
SJMP START
END
multi switch.asm
ORG 00H
START: MOV A,P1 ;读取P1口数据
SWAP A ;交换A中高四位与低四位的位置
ORL A,#0F0H ;与0F0H相或
MOV P1,A ;将开关状态送LED显示
SJMP START
END