II2C总线芯片 24c0x读写程序

ID:189450 · 发表于 2017-4-17 21:50

#include<reg51.h>
#include"intrins.h" //  _nop_();
#define uint unsigned int
#define uchar unsigned char
sbit scl=P2^1;
sbit sda=P2^0;
bit write=0;
uint num,num1;
uchar ge,shi;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,
0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay_ms(uint Z)
{
      uint x,y;
      for(x=Z;x>0;x--)
      for(y=110;y>0;y--);
}
/*****ÅäÖÃIICD¾Æ¬**********/
void delay()
{
      _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();
}
void start()//¿aê¼
{
      sda=1;
      delay();
      scl=1;
      delay();
      sda=0;
      delay();
}
void stop()
{
      sda=0;
      delay();
      scl=1;
      delay();
      sda=1;
      delay();
}
void respons()
{
      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;
}

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;
}
/************êyÂë1üÏÔê¾oˉêy*********************/
void display(uchar shi,uchar ge)
{
      P1=0xdf;
      P0=table[shi];
      delay_ms(5);

      P1=0xef;
      P0=table[ge];
      delay_ms(5);


}
/*********Ö÷oˉêy************************/
void main()
{
      init();
      num1=read_add(2);
      if(num1>100)
            num1=0;
      TMOD=0x01;
      TH0=(65536-50000)/256;
      TL0=(65536-50000)%256;
      ET0=1;
      EA=1;
      TR0=1;
      while(1)
      {
            display(num1/10,num1%10);
            if(write==1)
            {
                     write=0;
                     write_add(2,num1);
            }
      }
}
/*******ÖD¶Ïoˉêy*****************************/
void time0() interrupt 1
{
      TH0=(65536-50000)/256;
      TL0=(65536-50000)%256;
      num++;
      if(num==20)
      {
            num=0;
            num1++;
            write=1;
            if(num1==100)
                     num1=0;
      }
}

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II2C总线芯片 24c0x读写程序

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