/*
 11-2-2012
 Spark Fun Electronics
 Nathan Seidle
 
 This code is public domain but you buy me a beer if you use this and we meet someday (Beerware license).
 
 Serial7Segment is an open source seven segment display. 
 
 This is example code that shows how to send data over I2C to the display.
 
 Note: This code expects the display to be listening at the default I2C address. If your display is not at 0x71, you can
 do a software or hardware reset. See the Wiki for more info: 
 http://github.com/sparkfun/Serial7SegmentDisplay/wiki/Special-Commands
 
 To get this code to work, attached an Serial7Segment to an Arduino Uno using the following pins:
 A5 to SCL
 A4 to SDA
 VIN to PWR
 GND to GND
 
 */

#include <Wire.h>

#define DISPLAY_ADDRESS1 0x71 //This is the default address of the OpenSegment with both solder jumpers open

int cycles = 0;

void setup() 
{
  Wire.begin(); //Join the bus as master

  //Send the reset command to the display - this forces the cursor to return to the beginning of the display
  Wire.beginTransmission(DISPLAY_ADDRESS1);
  Wire.write('v');
  Wire.endTransmission();
}

void loop() 
{
  // clearing
  Wire.beginTransmission(DISPLAY_ADDRESS1);
  Wire.write(0x76);
  Wire.endTransmission();
  delay(1000);

  // simple send
  Wire.beginTransmission(DISPLAY_ADDRESS1);
  Wire.write(0x01);
  Wire.write('2');
  Wire.write(0x0A);
  Wire.write('B');
  Wire.endTransmission();
  delay(1000);

  // moving cursor
  Wire.beginTransmission(DISPLAY_ADDRESS1);
  Wire.write(0x79);
  Wire.write(0x01);
  Wire.write('B');
  Wire.endTransmission();
  delay(1000);

  // decimal
  for (int i = 0; i < 8; i++) {
    Wire.beginTransmission(DISPLAY_ADDRESS1);
    Wire.write(0x77);
    Wire.write(0x01<<i); 
    Wire.endTransmission();
    delay(200);
  }

  // Brightness control
  // clearing
  Wire.beginTransmission(DISPLAY_ADDRESS1);
  Wire.write(0x76);
  Wire.endTransmission();

  Wire.beginTransmission(DISPLAY_ADDRESS1);
  Wire.write('L');
  Wire.write('A');
  Wire.write('R');
  Wire.write('S');
  Wire.endTransmission();
  
  for (int i = 0; i <= 255; i=i+10) {
    Wire.beginTransmission(DISPLAY_ADDRESS1);
    Wire.write(0x7A);
    Wire.write(i); 
    Wire.endTransmission();
    delay(10);
  }
  delay(1000);

  // direkt segment control
  Wire.beginTransmission(DISPLAY_ADDRESS1);
  Wire.write(0x76);
  Wire.endTransmission();

  // decimal
  for (int i = 0; i < 8; i++) {
    Wire.beginTransmission(DISPLAY_ADDRESS1);
    Wire.write(0x7B);
    Wire.write(0x01<<i); 
    Wire.endTransmission();
    delay(200);
  }
}