//**************************************************************//
//  Name    : shiftOutCode, Hello World
//  Author  : Carlyn Maw,Tom Igoe, David A. Mellis
//  Date    : 25 Oct, 2006
//  Modified: 23 Mar 2010
//  Version : 2.0
//  Notes   : Code for using a 74HC595 Shift Register           //
//          : to count from 0 to 255
//****************************************************************
//adapted by Sam Prestwood, 03 Jun 2012

//Pin connected to ST_CP (12) of 74HC595
int latchPin1 = 12, latchPin2 = 9;
//Pin connected to SH_CP (11) of 74HC595
int clockPin1 = 11, clockPin2 = 8;
////Pin connected to DS (14) of 74HC595
int dataPin1 = 13, dataPin2 = 10;
int timeDelay = 500;

/*
    Shift Register 1:
    1: col4, red, 2
    2: col4, green, 4
    3: col4, blue, 8
    4: col3, red, 16
    5: col3, green, 32
    6: col3, blue, 64
    7: col2, red, 128
    8: row4, gnd, 256

    Shift Register 2:
    1: col2, green, 2
    2: col2, blue, 4
    3: col1, red, 8
    4: col1, green, 16
    5: col1, blue, 32
    6: row2, gnd, 64
    7: row1, gnd, 128
    8: row3, gnd, 256
  */
  int allRed1 = 2+16+128, allRed2 = 8;
  int allGreen1 = 4+32, allGreen2 = 2+16;
  int allBlue1 = 8+64, allBlue2 = 4+32;


void setup() {
  pinMode(latchPin1, OUTPUT);
  pinMode(clockPin1, OUTPUT);
  pinMode(dataPin1, OUTPUT);
  pinMode(latchPin2, OUTPUT);
  pinMode(clockPin2, OUTPUT);
  pinMode(dataPin2, OUTPUT);
}

void loop() {

    //first shift register:
    digitalWrite(latchPin1, LOW);
    shiftOut(dataPin1, clockPin1, MSBFIRST, allRed1);
    digitalWrite(latchPin1, HIGH);
    //second shift register:
    digitalWrite(latchPin2, LOW);
    shiftOut(dataPin2, clockPin2, MSBFIRST, allRed2);
    digitalWrite(latchPin2, HIGH);
    delay(timeDelay);
        //first shift register:
    digitalWrite(latchPin1, LOW);
    shiftOut(dataPin1, clockPin1, MSBFIRST, 255);
    digitalWrite(latchPin1, HIGH);
    //second shift register:
    digitalWrite(latchPin2, LOW);
    shiftOut(dataPin2, clockPin2, MSBFIRST, 255);
    digitalWrite(latchPin2, HIGH);
    delay(timeDelay);

    //first shift register:
    digitalWrite(latchPin1, LOW);
    shiftOut(dataPin1, clockPin1, MSBFIRST, allBlue1);
    digitalWrite(latchPin1, HIGH);
    //second shift register:
    digitalWrite(latchPin2, LOW);
    shiftOut(dataPin2, clockPin2, MSBFIRST, allBlue2);
    digitalWrite(latchPin2, HIGH);
    delay(timeDelay);
        //first shift register:
    digitalWrite(latchPin1, LOW);
    shiftOut(dataPin1, clockPin1, MSBFIRST, 255);
    digitalWrite(latchPin1, HIGH);
    //second shift register:
    digitalWrite(latchPin2, LOW);
    shiftOut(dataPin2, clockPin2, MSBFIRST, 255);
    digitalWrite(latchPin2, HIGH);
    delay(timeDelay);

    //first shift register:
    digitalWrite(latchPin1, LOW);
    shiftOut(dataPin1, clockPin1, MSBFIRST, allGreen1);
    digitalWrite(latchPin1, HIGH);
    //second shift register:
    digitalWrite(latchPin2, LOW);
    shiftOut(dataPin2, clockPin2, MSBFIRST, allGreen2);
    digitalWrite(latchPin2, HIGH);
    delay(timeDelay);
        //first shift register:
    digitalWrite(latchPin1, LOW);
    shiftOut(dataPin1, clockPin1, MSBFIRST, 255);
    digitalWrite(latchPin1, HIGH);
    //second shift register:
    digitalWrite(latchPin2, LOW);
    shiftOut(dataPin2, clockPin2, MSBFIRST, 255);
    digitalWrite(latchPin2, HIGH);
    delay(timeDelay);

}