使用的是CH559L芯片，用的是官方提供的CH559.h文件

报错信息如下：

遇到的情况如下：

1、经过测试，如果有两个.c文件包含了CH559.h头文件就会出现如上信息

2、报错的对象都来自于CH559.h

3、为了进行模块化编写，又不能在一个C文件里写所有代码，所以请教一下这个问题要怎么解决啊

The problem is that Keil c51 does Not Support a xsfr keyword. So you have to Work arround this.

The easy ugly way:

#define NO_XSFR_DEFINE

#include "ch559.h"

In all your c Files exept the first one to transate the xsfr defs to external declarations.

A better way would be to change ch559.h at the beginning with something Like this:

#ifdef __CH559_H__ //allready included somewhere

#define NO_XSFR_DEFINE

#endif

This way the header file itself will handle the changes.

I dont like the style of the original header files and therefore use my own ones.

@usbman还是不怎么懂，你用CH559.H可以发我一份吗？

你好，可以在CH559.h中增加NO_XSFR_DEFINE的宏定义。

Actually i forget to mention a third way. 

You may set NO_XSFR_DEFINE in the Keil IDE under 

options>Target>c51>defines globally vor all c files. 

Then change your main.c (and only that one) 

....

#undef NO_XSFR_DEFINE

#include "ch559.h"

....

By the way publishing my header files maybe does not make sense because i have designed them to be compatible with Keil, SDCC and IAR. Nothing vor a beginner i guess.