Ghi một chuỗi ký tự vào ROM ngoài

[cskiller]

void write_ext_eeprom(long int address, BYTE data)
{
   short int status;
   i2c_start();
   i2c_write(0xa0);
   i2c_write((address>>8)&0x1f);
   i2c_write(address);
   i2c_write(data);
   i2c_stop();
   i2c_start();
   status=i2c_write(0xa0);
   while(status==1)
   {
      i2c_start();
      status=i2c_write(0xa0);
   }
   i2c_stop();
}

BYTE read_ext_eeprom(long int address) {
   BYTE data;
   i2c_start();
   i2c_write(0xa0);
   i2c_write((address>>8)&0x1f);
   i2c_write(address);
   i2c_start();
   i2c_write(0xa1);
   data=i2c_read(0);
   i2c_stop();
   return(data);
}