//**************************************************************//
//  Name    : shiftOutCode, Predefined Dual Array Style         //
//  Author  : Carlyn Maw, Tom Igoe                              //
//  Date    : 25 Oct, 2006                                      //
//  Version : 1.0                                               //
//  Notes   : Code for using a 74HC595 Shift Register           //
//          : to count from 0 to 255                            //
//****************************************************************

//Pin connected to ST_CP of 74HC595
static int latchPin = 8;
//Pin connected to SH_CP of 74HC595
static int clockPin = 12;
////Pin connected to DS of 74HC595
static int dataPin = 11;

//holders for infromation you're going to pass to shifting function
byte dataRED;
byte dataGREEN;
byte dataArrayRED[10];
byte dataArrayGREEN[10];

void setup() {
  //set pins to output because they are addressed in the main loop
  pinMode(latchPin, OUTPUT);
  Serial.begin(9600);

  //Arduino doesn't seem to have a way to write binary straight into the code
  //so these values are in HEX.  Decimal would have been fine, too.
  dataArrayRED[0] = 11111111; //11111111
  dataArrayRED[1] = 11111111; //11111110
  dataArrayRED[2] = 00000000; //11111100
  dataArrayRED[3] = 11111111; //11111000
  dataArrayRED[4] = 00000000; //11110000
  dataArrayRED[5] = 11111111; //11100000
  dataArrayRED[6] = 00000000; //11000000
  dataArrayRED[7] = 11111111; //10000000
  dataArrayRED[8] = 00000000; //00000000
  dataArrayRED[9] = 11111111; //11100000

  //Arduino doesn't seem to have a way to write binary straight into the code
  //so these values are in HEX.  Decimal would have been fine, too.
  dataArrayGREEN[0] = 11111111; //11111111
  dataArrayGREEN[1] = 0xFF; //01111111
  dataArrayGREEN[2] = 0xFF; //00111111
  dataArrayGREEN[3] = 0xFF; //00011111
  dataArrayGREEN[4] = 0xFF; //00001111
  dataArrayGREEN[5] = 0xFF; //00000111
  dataArrayGREEN[6] = 0xFF; //00000011
  dataArrayGREEN[7] = 0xFF; //00000001
  dataArrayGREEN[8] = 0xFF; //00000000
  dataArrayGREEN[9] = 0xFF; //00000111

  //function that blinks all the LEDs
  //gets passed the number of blinks and the pause time
  //blinkAll_2Bytes(2,500);


    //load the light sequence you want from array
    dataRED = B00000010;
    dataGREEN = B00001001;
    //ground latchPin and hold low for as long as you are transmitting
    digitalWrite(latchPin, 0);
    //move 'em out
    shiftOut(dataPin, clockPin, B11110000);
    shiftOut(dataPin, clockPin, B00010010);
    shiftOut(dataPin, clockPin, B01001001);
    shiftOut(dataPin, clockPin, B00100100);
    //return the latch pin high to signal chip that it
    //no longer needs to listen for information
    digitalWrite(latchPin, 1);
    digitalWrite(latchPin, 0);

    delay (2000);
    shiftOut(dataPin, clockPin, B11110000);
    shiftOut(dataPin, clockPin, B00011011);
    shiftOut(dataPin, clockPin, B01101101);
    shiftOut(dataPin, clockPin, B10110110);
    //return the latch pin high to signal chip that it
    //no longer needs to listen for information
    digitalWrite(latchPin, 1);
    digitalWrite(latchPin, 0);

    delay (2000);
    shiftOut(dataPin, clockPin, B11110000);
    shiftOut(dataPin, clockPin, B00001001);
    shiftOut(dataPin, clockPin, B00100100);
    shiftOut(dataPin, clockPin, B10010010);
    //return the latch pin high to signal chip that it
    //no longer needs to listen for information
    digitalWrite(latchPin, 1);
    digitalWrite(latchPin, 0);

}

void loop() {
}



// the heart of the program MSB first
void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
  int i=0;
  int pinState;
  pinMode(myClockPin, OUTPUT);
  pinMode(myDataPin, OUTPUT);
  digitalWrite(myDataPin, 0);
  digitalWrite(myClockPin, 0);

  for (i=7; i>=0; i--)  {
    digitalWrite(myClockPin, 0);
    if ( myDataOut & (1<<i) ) {
      pinState= 1;
    }
    else {
      pinState= 0;
    }

    //Sets the pin to HIGH or LOW depending on pinState
    digitalWrite(myDataPin, pinState);
    //register shifts bits on upstroke of clock pin
    digitalWrite(myClockPin, 1);
    //zero the data pin after shift to prevent bleed through
    digitalWrite(myDataPin, 0);
  }

  //stop shifting
  digitalWrite(myClockPin, 0);
}