请各位网友看看如何读写这个eeprom

只看该作者 · 2014-3-11 13:04

这是我的程序，总是写不进去。各位大师帮忙看看/谢谢各位了！

#include<reg52.h>
#include <soft_delay.h>

sbit scl=P2^0; //¶ÔÓ¦c8051f340¿ª·¢°åscl
sbit sda=P2^1; //¶ÔÓ¦c8051f340¿ª·¢°åsda
sbit led=P2^4; //¹¤×÷Ö¸Ê¾µÆ

void start() //¿ªÊ¼ÐÅºÅ
{
sda=1;
delay();
scl=1;
delay();
sda=0;
delay();
}
void stop() //½áÊøÐÅºÅ
{
sda=0;
delay();
scl=1;
delay();
sda=1;
delay();
}
void respons() //Ó¦´ðÐÅºÅ
{
uchar i;
scl=1;
delay();
while((sda==1)&&(i<250))
i++;
scl=0;
delay();
}
void init()
{
sda=1;
delay();
scl=1;
delay();
}
void write_byte(uchar date)
{
uchar i,temp;
temp=date;
for(i=0;i<8;i++)
{
temp=temp<<1;
scl=0;
delay();
sda=CY;
delay();
scl=1;
delay();
}
scl=0;
delay();
sda=1;
delay();
}
uchar read_byte()
{
uchar i,k;
scl=0;
delay();
sda=1;
delay();
for(i=0;i<8;i++)
{
scl=1;
delay();
k=(k<<1)|sda;
scl=0;
delay();
}
return k;

}
/*Ö¸¶¨µØÖ·¶ÁÒ»¸ö×Ô¼ºµÄº¯Êý*/
uchar read_add(uchar address)
{
uchar date;
start();
write_byte(0xa0);
respons();
write_byte(address);
respons();
start();
write_byte(0xa1);
respons();
date=read_byte();
stop();
return date;
}
/*Ö¸¶¨µØÖ·Ð´Ò»¸ö×Ö½ÚµÄº¯Êý*/
void write_add(uchar address,uchar date)
{
start();
write_byte(0xa0);
respons();
write_byte(address);
respons();
write_byte(date);
respons();
stop();
}
uchar p;
void main()
{
init();
write_add(0x00,0x99);
p=read_add(0x00);
if(p==0x99)
{
led=~led;
delay();
delay();
}
else
{
led=0;
}

}

只看该作者 · 2014-3-11 13:10

#include<reg52.h>
#include <soft_delay.h>

sbit scl=P2^0;
sbit sda=P2^1;
sbit led=P2^4;

void start() //总线开始信号
{
sda=1;
delay();
scl=1;
delay();
sda=0;
delay();
}
void stop() //总线结束信号
{
sda=0;
delay();
scl=1;
delay();
sda=1;
delay();
}
void respons() //总线应答信号
{
uchar i;
scl=1;
delay();
while((sda==1)&&(i<250))
i++;
scl=0;
delay();
}
void init()                      //总线初始化
{
sda=1;
delay();
scl=1;
delay();
}
void write_byte(uchar date)          //写字节函数
{
uchar i,temp;
temp=date;
for(i=0;i<8;i++)
{
temp=temp<<1;
scl=0;
delay();
sda=CY;
delay();
scl=1;
delay();
}
scl=0;
delay();
sda=1;
   delay();
}
uchar read_byte()                   //读字节函数
{
uchar i,k;
scl=0;
delay();
sda=1;
delay();
for(i=0;i<8;i++)
{
scl=1;
delay();
k=(k<<1)|sda;
scl=0;
delay();
}
return k;

}
/*指定地址读一个字节的函数*/
uchar read_add(uchar address)
{
    uchar date;
start();
write_byte(0xa0);
respons();
write_byte(address);
respons();
start();
write_byte(0xa1);
respons();
date=read_byte();
stop();
return date;
}
/*指定地址写一个字节的函数*/
void write_add(uchar address,uchar date)
{
start();
write_byte(0xa0);
respons();
write_byte(address);
respons();
write_byte(date);
respons();
stop();
}
uchar p;
void main()                //主函数
{
init();
write_add(0x00,0x99);
p=read_add(0x00);          //写进去后再读出来。看看写的对不对。
if(p==0x99)                   //写的对不对，用这个灯指示一下了
{
led=~led;
delay();
delay();
}
else
{
led=0;
}

}