#include<reg51.h> 
 #define H   1
 #define L   0	   
 #define uchar unsigned char
 sbit EOC= P0^4;	//pin1	near by the VCC
sbit CLK= P3^6;	//pin2
sbit DI=  P1^7;	//pin3
sbit DO=  P1^6;	//pin4
sbit CS=  P3^7; //pin5
//2543 work when cs=L