大佬們幫忙看看，萌新不太懂，找不到問題所在。
點擊開始按鈕，所有的燈瞬間閃了一下就滅了，然后就都沒反應了。
keil文件沒報錯，proteus也沒報錯，這是怎么回事啊？
keil程序如下=================================
I2C.c
#include"i2c.h"
void delay()
{
;;
}
void start()
{
SDA=1;
SCK=1;
delay();
SDA=0;
delay();
}
void stop()
{
SDA=0;
SCK=1;
delay();
SDA=1;
delay();
}
void ack()
{
uchar i;
SCK=1;
delay();
while((SDA==1)&&(i<250))i++;
SCK=0;
delay();
}
void nack()
{
SCK=1;
delay();
SDA=1;
SCK=0;
delay();
}
void write_byte(uchar date)
{
uchar i,temp;
temp=date;
for(i=0;i<8;i++)
{
temp=temp<<1;
SCK=0;
delay();
SDA=CY;
delay();
SCK=1;
delay();
}
SCK=0;
delay();
SDA=1;
delay();
}
uchar read_byte()
{
uchar i,j,k;
SCK=0;
delay();
for(i=0;i<8;i++)
{
SCK=1;
delay();
j=SDA;
k=(k<<1)|j;
SCK=0;
delay();
}
return k;
}
void write_at24c02(uchar address,uchar date)
{
start();
write_byte(0xa0);
ack();
write_byte(address);
ack();
write_byte(date);
ack();
stop();
}
uchar read_at24c02(uchar address)
{
uchar date;
start();
write_byte(0xa0);
ack();
write_byte(address);
ack();
start();
write_byte(0xa1);
nack();
stop();
return date;
}
=============================
main.c
#include<reg52.h>
#include"i2c.h"
void delay_10ms()
{
uchar a,b;
for(a=50;a>0;a--)
for(b=200;b>0;b--);
}
void main()
{
start();
write_at24c02(10,0xcc);
delay_10ms();
P1=read_at24c02(10);
while(1);
}
=======================
i2c.h
#ifndef __I2C_H__
#define __I2C_H__
#include<reg52.h>
#define uchar unsigned char
sbit SDA=P2^0;
sbit SCK=P2^1;
void delay();
void start();
void stop();
void ack();
void nack();
void write_byte(uchar date);
uchar read_byte();
void write_at24c02(uchar address,uchar date);
uchar read_at24c02(uchar address);
#endif
=================================
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