Lab_interaccio/2010/reloj_2wire_particula/reloj_2wire_particula.pde

/*
 - RECEIVE COMMAND: 'c' 'l' 'o' 'c' 'k' minute second
 - AFTER VALID COMMAND THE SYSTEM UPDATE THE NEW TIME AND ACTIVATE THE COUNTER
 - AFTER COUNT WAIT FOR THE NEXT VALID COMMAND
 */

//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;

int second=59, minute=14;
int stop_counter = 0;
int bytesread = 0;

int clock_pin = 6;
int clock_gnd = 7;

//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);
  pinMode(clock_pin, INPUT);
  pinMode(clock_gnd, OUTPUT);
  Serial.begin(57600);
  
  digitalWrite(clock_gnd, LOW);

  //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;

  blinkAll_4Bytes(2,500); 

}

void loop() {

/*
  // Serial input
  if(Serial.available() > 0) {
    if(Serial.read() == 'c') {                  // check for header 
      bytesread = 0; 
      Serial.println("detectada c");
      while (bytesread < 6) {                        // read c lock minute second
        if( Serial.available() > 0) { 
          int incomingByte = Serial.read();      
          if( (incomingByte == 'l') && (bytesread == 0) )
          {
            bytesread = 1;
            Serial.println("detectada l");
          }
          else if( (incomingByte == 'o') && (bytesread == 1) )
          {
            bytesread = 2;
            Serial.println("detectada o");
          }
          else if( (incomingByte == 'c') && (bytesread == 2) )
          {
            bytesread = 3;
            Serial.println("detectada c");
          }          
          else if( (incomingByte == 'k') && (bytesread == 3) )
          {
            bytesread = 4;
            Serial.println("detectada k");
          }            
          else if( bytesread == 4 )
          {
            minute = incomingByte;
            bytesread = 5;
            Serial.print("detectado minute "); 
            Serial.println(minute);    
          }        
          else if( bytesread == 5 )
          {
            second = incomingByte;
            bytesread = 6;
            Serial.print("detectado second ");
            Serial.println(second);           
            stop_counter = 0;     
          }     
          else
            bytesread = 6; 
        }
      } 
    }
    Serial.flush();
  }
*/

  if (digitalRead(clock_pin))
  {
    stop_counter = 0;
    second = 44;
    minute = 7;
  }

  static unsigned long lastTick = 0; // set up a local variable to hold the last time we moved forward one second
  // move forward one second every 1000 milliseconds
  if ( (millis() - lastTick >= 1000) && stop_counter == 0 ) {
    lastTick = millis();
    clockOutput();    
    //Serial.print("second ");
    //Serial.println(second);
    second--;
  }

  // move forward one minute every 60 seconds
  if (second < 0) {
    minute--;
    second = 59; // reset seconds to zero
    //Serial.print("minut ");
    //Serial.println(minute);
  }

  // move forward one hour every 60 minutes
  if (minute < 0) {
    stop_counter = 1;
    //Serial.println("FINAL DE CUENTA");
    minute = 0; // reset minutes to zero
    if(stop_counter) { 
      blink_black_out(5,1000);
    }
  }
}

void start_counter()
{
  int second=59, minute=14;
  Serial.flush();
}


void clockOutput()
{
  int sec_unit, sec_dec;
  int min_unit, min_dec;
  sec_unit = second%10;
  sec_dec = second/10;
  min_unit = minute%10;
  min_dec = minute/10;

  digitalWrite(latchPin, 0);   
  shiftOut(dataPin, clockPin, dataArrayseg1[min_dec]);  
  data=dataArrayseg2[min_unit]|puntos[second%2];
  shiftOut(dataPin, clockPin, data);
  shiftOut(dataPin, clockPin, dataArrayseg3[sec_dec]);   
  shiftOut(dataPin, clockPin, dataArrayseg4[sec_unit]);
  digitalWrite(latchPin, 1);

}

// 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) {
  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);
  }
}

void black_out() {

  digitalWrite(latchPin, 0);
  shiftOut(dataPin, clockPin, 0);
  shiftOut(dataPin, clockPin, 0);
  shiftOut(dataPin, clockPin, 0);
  shiftOut(dataPin, clockPin, 0);
  digitalWrite(latchPin, 1);

}

void blink_black_out(int n, int d) {
  for (int x = 0; x < n; x++) {
    digitalWrite(latchPin, 0);
    shiftOut(dataPin, clockPin, dataArrayseg1[0]);
    shiftOut(dataPin, clockPin, dataArrayseg2[0]);
    shiftOut(dataPin, clockPin, dataArrayseg3[0]);
    shiftOut(dataPin, clockPin, dataArrayseg4[0]);
    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);
  }
}