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我是靠谱客的博主大方硬币，最近开发中收集的这篇文章主要介绍1，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

#include"include.h"

bit write=0;
uchar sec;
uchar segment1[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void IIC_Init(void)
{
IIC_SDA=1;
IIC_SCL=1;
}

void IIC_Start(void)
{
IIC_SDA=1;
Delay();
IIC_SCL=1;
Delay();
IIC_SDA=0;
Delay();
}

void IIC_Stop(void)
{
IIC_SDA=0;
Delay();
IIC_SCL=1;
Delay();
IIC_SDA=1;
Delay();
}

void IIC_Response(void)
{
uchar i;
IIC_SCL=1;
Delay();
while((IIC_SDA==1)&&(i<250))
i++;
IIC_SCL=0;
Delay();
}

void IIC_WriteOneByte(uchar Data)
{
uchar i,temp;
temp=Data;
for(i=0;i<8;i++)
  {
   temp=temp<<1;
   IIC_SCL=0;
   Delay();
   IIC_SDA=CY;
   Delay();
   IIC_SCL=1;
   Delay();
  }
IIC_SCL=0;
Delay();
IIC_SDA=1;
Delay();
}

uchar IIC_ReadOneByte(void)
{
uchar i,k;
IIC_SCL=0;
Delay();
IIC_SDA=1;
Delay();
for(i=0;i<8;i++)
  {
   IIC_SCL=1;
   Delay();
   k=(k<<1)|IIC_SDA;
   IIC_SCL=0;
   Delay();
  }
  return k;
}

void IIC_WriteOneByteOnAddr(uchar Addr,uchar Data )
{
IIC_Start();
IIC_WriteOneByte(0xa0);
IIC_Response();
IIC_WriteOneByte(Addr);
IIC_Response();
IIC_WriteOneByte(Data);
IIC_Response();
IIC_Stop();
}

uchar IIC_ReadOneByteOnAddr(uchar Addr)
{
uchar Data;
IIC_Start();
IIC_WriteOneByte(0xa0);
IIC_Response();
IIC_WriteOneByte(Addr);
IIC_Response();
IIC_Start();
IIC_WriteOneByte(0xa1);
IIC_Response();
Data=IIC_ReadOneByte();
IIC_Stop();
return Data;
}

void IIC_Func(void)
{
IIC_Init();
sec=IIC_ReadOneByteOnAddr(2);
if(sec>100)
  sec=0;
TMOD=0x01;
ET0=1;
EA=1;
TH0=(65535-50000)/256;
TL0=(65535-50000)%256;
TR0=1;
while(1)
  {
   Segment1_Display(sec/10, sec%10);
   if(write=1)
    {
     write=0;
     IIC_WriteOneByteOnAddr(2, sec);
    }
  }
}

void Segment1_Display(uchar bai_c,uchar shi_c)
{
dula=0;
P0=segment1[bai_c];
dula=1;
dula=0;
wela=0;
P0=0x7e;
wela=1;
wela=0;
Delay_MS(5);
dula=0;
P0=segment1[shi_c];
dula=1;
dula=0;
wela=0;
P0=0x7d;
wela=1;
wela=0;
Delay_MS(5);
}