/*

http://www.bristolwatch.com/arduino/arduino_24lc08.htm
Arduino with a 24LC08 Serial EEPROM
Lewis Loflin lewis@bvu.net
This code comes with no warranty.

*/


#include <Wire.h> // specify use of Wire.h library.
#define SW0 12 
// digital pin for switch connected to ground.
// address in 24LC08. values from 000 hex to 3FF hex.

int position_pointer = 0x3f0;

void setup()   {
  pinMode(SW0, INPUT);
  digitalWrite(SW0, HIGH); // turn on internal pull up
  Wire.begin(); // join i2c bus (address optional for master)
  Serial.begin(9600);  // setup serial for output
  // send test message "Arduino"
  Wire.beginTransmission(0x50); // connect to 24LC08 device address
  Wire.write(position_pointer); // beginning address within EEPROM
  Wire.write("Arduino");
  Wire.endTransmission();
}

void loop()   {
  while (digitalRead(SW0) == 1) {
  } // wait here until switch is pushed.
  Wire.beginTransmission(0x50); // link to 24LC08
  Wire.write(position_pointer); // must act as a position pointer
  Wire.endTransmission();
  Wire.requestFrom(0x50, 7);
  // request 7 bytes from slave device 24LC08
  // below will loop until 7 bytes are received.
  while (Wire.available()) // slave may send less than requested
  {
    byte c = Wire.read(); // receive a byte as character
    Serial.print(c); // print the character
  }
  Serial.print("\n"); // next line
  delay(1000); // wait one second.
}