您的位置 首页 报告

单片机模仿IIC总线与EEPROM进行数据通信

includereg52h>defineucharunsignedcharsbitsda=P2^0;sbitscl=P2^1;uchara;voiddelay(){;;}voidstart()开

#include

#define uchar unsigned char
sbit sda=P2^0;
sbit scl=P2^1;
uchar a;
void delay()
{ ;; }
void start() //开端信号
{
sda=1;
delay();
scl=1;
delay();
sda=0;
delay();
}

void stop() //中止
{
sda=0;
delay();
scl=1;
delay();
sda=1;
delay();
}

void respons() //应对
{
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();
}
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;
}

void delay1(uchar x)
{
uchar a,b;
for(a=x;a>0;a–)
for(b=100;b>0;b–);
}

void write_add(uchar address,uchar date)
{
start();
write_byte(0xa0);
respons();
write_byte(address);
respons();
write_byte(date);
respons();
stop();
}

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;
}

void main()
{
init();
write_add(23,0xaa);
delay1(100);
P1=read_add(23);
while(1);
}

声明:本文内容来自网络转载或用户投稿,文章版权归原作者和原出处所有。文中观点,不代表本站立场。若有侵权请联系本站删除(kf@86ic.com)https://www.86ic.net/ceping/baogao/261065.html

为您推荐

联系我们

联系我们

在线咨询: QQ交谈

邮箱: kf@86ic.com

关注微信
微信扫一扫关注我们

微信扫一扫关注我们

返回顶部