pic单片机16F877与spi接口的eeprom读写C程序

unsigned char seg8[10]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,
0x07,0x7F,0x67};//显示比划代码
one=x%10;
ten=x/10%10;
hund=x/100%10;
thou=x/1000%10;
while(d>0)
{
PORTB=seg8[one];
//pic单片机16F877与spi接口的eeprom读写C程序
//显示采用扫描
//晶振7.3728MHz
//调试成功
//--------作者：高冀华
#include<pic.h>
#include<stdlib.h>
#define nop() asm("nop")
unsigned int word;
RD3=1;
delay(300);
RD3=0;
delay(4);
PORTB=seg8[ten];
//display ten code to PORTB
RD2=1;
//begain to display
delay(300);
//for see to delay
RD2=0;//stop display ten
{
unsigned char data2;
RA1=0;//启动
nop();
spi_com(0x03);//发读指令
spi_com(add2);
spi_com(0);//为eeprom输出data，提供时钟用*******
data2=SSPBUF;
RA1=1;// stop
return data2;
}
//------------
void main()
{
beep();
spi_res();
word=8888;
while(1)
{
if(RD5==0)
{send(rand(),12);
beep();
}
if(RD4==0)
{
word=read(12);
}
display(word);
}
}
//stop to delay
PORTB=seg8[thou];
//display thou code to PORTB
RD0=1;
//begain to display
delay(300);
//for see to delay
RD0=0;//stop display thou
delay(4);
//stop to delay
delay(4);
//stop to delay
PORTB=seg8[hund];
//display hund code to PORTB
RD1=1;
//begain to display
delay(300);
//for see to delay
RD1=0;//stop display hund
delay(4);
void spi_en()
{
RA1=0;
spi_com(0x06);//WREN code
RA1=1;
nop();
}
//send data ========
void send(unsigned char data,unsigned char add)
{
spi_en();//spi enable
RA1=0;
unsigned char temp;
void delay(unsigned int k)
{
while(k>0)
{k--;}
}
// display zone
void display(unsigned int x)
{
TRISB=0;
TRISD=0b00110000;
unsigned char d=4,one,ten,hund,thou;
d--;
//d=d-1
}
}
void beep()
{
TRISD7=0;
RD7=1;
delay(10000);
RD7=0;
}
//======spi reset====
void spi_res()
{
TRISC3=0;
TRISC5=0;
TRISC4=1;
SSPCON=0b00100000;
INTCON=0x00;
SSPSTAT=0b11000000;
ADCON1=0b00000110;
TRISA1=0;
}
//*----spi comuncation
void spi_com(unsigned char x)
{
SSPBUF=x;
while(SSPIF==0);
SSPIF=0;
}
//-----------spi enable
nop();e
spi_com(add);
spi_com(data);
RA1=1;
nop();
}
//=====read data===精华在这里，我用了几天才成，书上大部分是错的===
unsigned char read(unsigned char add2)