显示"范"
#include<reg51.h>
#include<stdio.h>
#include<intrins.h>
sbit SI=P1^0;
sbit SCK=P1^1;
sbit SO=P1^2;
sbit SCS=P3^5;
sbit E=P1^3;
sbit RS=P1^5;
sbit RW=P1^4;
sbit PSB=P3^4;
sbit RESET=P1^7;
sbit bbc=P0^7;
DELAY();
INPUT(unsigned char I);
DELAY01();
void outbyte(unsigned char outda)
{
unsigned char i,a;
a=outda;
for(i=0;i<8;i++)
               {
                               SCK=0;
                               if(a&0x80)     SI=1;
                               else   SI=0;
                               a<<=1;
                               SCK=1;
               }

}
unsigned char inbyte(void)
{
unsigned char i,a;
               a=0;
               for(i=0;i<8;i++)
               {
                               SCK=1;
                               SCK=0;
                               a<<=1;
                               if(SO)     a++;
               }

               return a;
}
unsigned char read_x25045(unsigned int addr)
{
unsigned char b,a;
bit had;
b=addr;
if(b&0x0100)   had=1;
else                         had=0;
SCK=0;
SCS=0;
a=0x03;
if(had) a|=8;
outbyte(a);
a=b;
outbyte(a);
a=inbyte();
SCK=0;
SCS=1;
return a;
}