#ifdef XDmain
    #define XD_EXT

#else
    #define XD_EXT extern

#endif

XD_EXT uchar syserr;


XD_EXT uchar txd_buf[70];	//用于通過串口向PC機傳送讀寫數據及狀態



extern void txdpo(uchar *txdbuf, uchar a);





//-------------以下函數供其它程序調用-------------------------------------------
extern void wt24c(uchar *p_rsc, uint ad_dst, uint num);     //把數據寫入24cxx
extern void rd24c(uchar *p_dst, uint ad_rsc, uint num);     //從24cxx讀出數據
//------------------------------------------------------------------------------

//-----毫秒級延時;包含于delay.lib--------------
extern void tms(uchar t);
extern void tus(uchar t);
//---------------------------------------------



extern void setreg_m16(void);	//初始化cpu