uchar
Key_Board(void)
{
uchar a,key=0;
P1=0X1F;
P3=0XFF;
if(P3==0XFF) return 0;
else{
Value_Flag=1;
Delay();
for(a=0;a<3;a++){
P1=_crol_(0XDF,a);
if(P32==0) break;
if(P33==0) break;
if(P34==0) break;
if(P35==0) break;
.......
头文件为
#ifndef _KEYBOARD_H
#define _KEYBOARD_H
#include<reg52.h>
#include<intrins.h>
#include<stdio.h>
#define uchar unsigned char
void Delay(void);
uchar Key_Board(void);
uchar Key_Value(void);
sbit P32=P3^2;
sbit P33=P3^3;
sbit P34=P3^4;
sbit P35=P3^5;
bit Value_Flag=0;
#endif
编译器出现：
Build target 'Target 1'
compiling keyboard.c...
compiling ceshi2.c...
linking...
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
SYMBOL: VALUE_FLAG
MODULE: ceshi2.obj (CESHI2)
Program Size: data=10.2 xdata=0 code=272
Target not created
主程序测试按键标志(Value_Flag),删除这个标志之后就可以编译 |
|
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