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

//holders for infromation you're going to pass to shifting function
byte data;
byte dataArrayseg1[10];
byte dataArrayseg2[10];
byte dataArrayseg3[10];
byte dataArrayseg4[10];
byte puntos[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. 
  dataArrayseg1[0] = B01101111;
  dataArrayseg1[1] = B00000011; 
  dataArrayseg1[2] = B01011101; 
  dataArrayseg1[3] = B01010111;
  dataArrayseg1[4] = B00110011;
  dataArrayseg1[5] = B01110110;
  dataArrayseg1[6] = B01111110;
  dataArrayseg1[7] = B01000011;
  dataArrayseg1[8] = B01111111;
  dataArrayseg1[9] = B01110111;

  //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. 
  
  puntos[0] = B00000000;
  puntos[1] = B00000001;
  puntos[2] = B00000000;
  puntos[3] = B00000001;
  puntos[4] = B00000000;
  puntos[5] = B00000001;
  puntos[6] = B00000000;
  puntos[7] = B00000001;
  puntos[8] = B00000000;
  puntos[9] = B00000001;
  
  
  dataArrayseg2[0] = B11011110;
  dataArrayseg2[1] = B00000110; 
  dataArrayseg2[2] = B10111010; 
  dataArrayseg2[3] = B10101110;
  dataArrayseg2[4] = B01100110;
  dataArrayseg2[5] = B11101100;
  dataArrayseg2[6] = B11111100;
  dataArrayseg2[7] = B10000110;
  dataArrayseg2[8] = B11111110;
  dataArrayseg2[9] = B11101110;
  
  dataArrayseg3[0] = B01111011;
  dataArrayseg3[1] = B01100000; 
  dataArrayseg3[2] = B01011101; 
  dataArrayseg3[3] = B01110101;
  dataArrayseg3[4] = B01100110;
  dataArrayseg3[5] = B00110111;
  dataArrayseg3[6] = B00111111;
  dataArrayseg3[7] = B01100001;
  dataArrayseg3[8] = B01111111;
  dataArrayseg3[9] = B01110111;
  
  dataArrayseg4[0] = B01111011;
  dataArrayseg4[1] = B01100000; 
  dataArrayseg4[2] = B01011101; 
  dataArrayseg4[3] = B01110101;
  dataArrayseg4[4] = B01100110;
  dataArrayseg4[5] = B00110111;
  dataArrayseg4[6] = B00111111;
  dataArrayseg4[7] = B01100001;
  dataArrayseg4[8] = B01111111;
  dataArrayseg4[9] = B01110111;
  
  

  //function that blinks all the LEDs
  //gets passed the number of blinks and the pause time
  blinkAll_4Bytes(2,500); 
}

void loop() {


  for (int j = 0; j < 10; j++) {
    digitalWrite(latchPin, 0);
    shiftOut(dataPin, clockPin, dataArrayseg1[j]);  
    data=dataArrayseg2[j]|puntos[j];
    shiftOut(dataPin, clockPin, data);
    shiftOut(dataPin, clockPin, dataArrayseg3[j]);   
    shiftOut(dataPin, clockPin, dataArrayseg4[j]);
    digitalWrite(latchPin, 1);
    delay(1000);
  }
}



// the heart of the program
void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
  // This shifts 8 bits out MSB first, 
  //on the rising edge of the clock,
  //clock idles low

  //internal function setup
  int i=0;
  int pinState;
  pinMode(myClockPin, OUTPUT);
  pinMode(myDataPin, OUTPUT);

  //clear everything out just in case to
  //prepare shift register for bit shifting
  digitalWrite(myDataPin, 0);
  digitalWrite(myClockPin, 0);

  //for each bit in the byte myDataOut�
  //NOTICE THAT WE ARE COUNTING DOWN in our for loop
  //This means that %00000001 or "1" will go through such
  //that it will be pin Q0 that lights. 
  for (i=7; i>=0; i--)  {
    digitalWrite(myClockPin, 0);

    //if the value passed to myDataOut and a bitmask result 
    // true then... so if we are at i=6 and our value is
    // %11010100 it would the code compares it to %01000000 
    // and proceeds to set pinState to 1.
    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);
}


//blinks the whole register based on the number of times you want to 
//blink "n" and the pause between them "d"
//starts with a moment of darkness to make sure the first blink
//has its full visual effect.
void blinkAll_4Bytes(int n, int d) {
  digitalWrite(latchPin, 0);
  shiftOut(dataPin, clockPin, 0);
  shiftOut(dataPin, clockPin, 0);
  digitalWrite(latchPin, 1);
  delay(200);
  for (int x = 0; x < n; x++) {
    digitalWrite(latchPin, 0);
    shiftOut(dataPin, clockPin, 255);
    shiftOut(dataPin, clockPin, 255);
    shiftOut(dataPin, clockPin, 255);
    shiftOut(dataPin, clockPin, 255);
    digitalWrite(latchPin, 1);
    delay(d);
    digitalWrite(latchPin, 0);
    shiftOut(dataPin, clockPin, 0);
    shiftOut(dataPin, clockPin, 0);
    shiftOut(dataPin, clockPin, 0);
    shiftOut(dataPin, clockPin, 0);
    digitalWrite(latchPin, 1);
    delay(d);
  }
}