PIC microcontroller i2c program

#include
#define uchar unsigned char
#define uint unsigned int
#define add 0xaa
__CONFIG(0xc3e4);
__CONFIG(0xffff);
#define DS1302 RC2 //Define to turn off the DS1302 clock chip so that the RC4 RC3 IO ports can be used for AT24C02 control.

const uchar ee_data[]={1,2,3,3,2,1};
uchar read_data[6];
const uchar table[]={0x3f, 0x6, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x7, 0x7f, 0x6f};
void delay(uint x);
void init();
void disp(uchar num1,uchar num2,uchar num3,uchar num4,uchar num5,uchar num6);
void write();
void read();
void main()
{
init();
DS1302=0;// 关掉DS1302
write();
delay(100);
read();

while(1)
{
disp(read_data[0],read_data[1],read_data[2],read_data[3],read_data[4],read_data[5]);
}
}
void delay(uint x)
{
uint a,b;
for(a=x;a>0;a--)
for(b=110;b>0;b--);
}
void init()
{
TRISD=0;
TRISA=0;
//TRISC=0;
TRISE0=1;
// ADCON1=0x07;
//RE0=1;
PORTD=0x3f;
PORTA=0x00;
TRISC=0x18;//用到RC3 RC4 输入 1

SSPSTAT=0x80;
SSPCON=0x38;
SSPCON2=0;
SSPADD=0x09;
//PORTE=1;
}
void write()
{
uchar i;
SSPIF=0;
SEN=1;
while(!SSPIF);
SSPIF=0;
SSPBUF=0xA0;
while(!SSPIF);
SSPIF=0;
SSPBUF=add;
while(!SSPIF);
SSPIF=0;
for(i=0;i<6;i++)
{
SSPBUF=ee_data[i];
while(!SSPIF);
SSPIF=0;
}
PEN=1;
while(!SSPIF);
SSPIF=0;
}
void read()
{
uchar i;
SSPIF=0;
SEN=1;
while(!SSPIF);
SSPIF=0;
SSPBUF=0xA0;
while(!SSPIF);
SSPIF=0;
SSPBUF=add;
while(!SSPIF);
SSPIF=0;
SSPIF=0;
RSEN=1;
while(!SSPIF);
SSPIF=0;
SSPBUF=0xA1;
while(!SSPIF);
SSPIF=0;
for(i=0;i<6;i++)
{
RCEN=1;
while(!SSPIF);
read_data[i]=SSPBUF;
while(!SSPIF);
SSPIF=0;
if(i>=5)
{
ACKDT=1;
}
else
{
ACKDT=0;
}
ACKEN=1;
while(!SSPIF);
SSPIF=0;
}
PEN=1;
while(!SSPIF);
SSPIF=0;
}

void disp(uchar num1,uchar num2,uchar num3,uchar num4,uchar num5,uchar num6)
{
PORTD=table[num1];//Display the first digital tube
PORTA=0x01;//0010 0000
delay(2);
PORTD=table[num2];//Display the second digital tube
PORTA=0x02;//0001 0000
delay(2);
PORTD=table[num3];//Display the third digital tube
PORTA=0x04;//0000 1000
delay(2);
PORTD=table[num4];//Display the fourth digital tube
PORTA=0x08;//0000 0100
delay(2);
PORTD=table[num5];//Display the fifth digital tube
PORTA=0x10;//0000 0010
delay(2);
PORTD=table[num6]; //Display the sixth digital tube
PORTA=0x20; //0000 0001
delay(2);
}