ArduinoSerialShiftRegister

/*
  Serial Event example

 When new serial data arrives, this sketch adds it to a String.
 When a newline is received, the loop prints the string and
 clears it.

 A good test for this is to try it with a GPS receiver
 that sends out NMEA 0183 sentences.

 Created 9 May 2011
 by Tom Igoe

 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/SerialEvent

 */
#include <Time.h>  
#include <Wire.h>  
#include <TimeAlarms.h>

#define TIME_HEADER  "T"
#define TIME_REQUEST  7    // ASCII bell character requests a time sync message

const int ledPin =  12;      // the pin number of the LED
const int ledPin2 = 13;      // the pin number of the LED2
const int tPin =  11;      // the pin for temperature TMP36

int SER_Pin = 8;   //pin 14 on the 75HC595
int RCLK_Pin = 9;  //pin 12 on the 75HC595
int SRCLK_Pin = 10; //pin 11 on the 75HC595

//How many of the shift registers - change this
#define number_of_74hc595s 1

//do not touch
#define numOfRegisterPins number_of_74hc595s * 8

boolean TimeIsSynced = false;

boolean registers[numOfRegisterPins];

String inputString = "";         // a string to hold incoming data
boolean stringComplete = false;  // whether the string is complete

char inData[20]; // Allocate some space for the string
char inChar=-1; // Where to store the character read
byte index = 0; // Index into array; where to store the character
boolean offline = true;

void setup() {

  const unsigned long DEFAULT_TIME = 1382036603 + (60 * 60 * 2); // Jan 1 2013

  setTime(DEFAULT_TIME);
  digitalClockDisplay();
  // led1
  pinMode(ledPin, OUTPUT);

  // led2
  pinMode(ledPin2, OUTPUT);
  Serial.begin(9600); // Initialize serial port

  while (!Serial) ; // wait until Arduino Serial Monitor opens

  if (Serial.available()) {

    Serial.println("Waiting for sync message");
  }


  Alarm.alarmRepeat(21,5,0, MorningAlarm);  // 8:30am every day
  Alarm.timerRepeat(60 * 1, AllOff);
  Alarm.timerRepeat(60 * 5, AllOn);
  // shift register
  pinMode(SER_Pin, OUTPUT);
  pinMode(RCLK_Pin, OUTPUT);
  pinMode(SRCLK_Pin, OUTPUT);
  //reset all register pins
  clearRegisters();
  writeRegisters();
}

void loop()
{
  serialReader();
  Alarm.delay(1000);

}

void serialReader(){
  int makeSerialStringPosition;
  int inByte;
  char serialReadString[50];
  const int terminatingChar = 13; //Terminate lines with CR

  inByte = Serial.read();
  makeSerialStringPosition=0;

  if (inByte > 0 && inByte != terminatingChar) { //If we see data (inByte > 0) and that data isn't a carriage return
    delay(100); //Allow serial data time to collect (I think. All I know is it doesn't work without this.)

    while (inByte != terminatingChar && Serial.available() > 0){ // As long as EOL not found and there's more to read, keep reading
      serialReadString[makeSerialStringPosition] = inByte; // Save the data in a character array
      makeSerialStringPosition++; //Increment position in array
      if (inByte > 0) Serial.println(inByte); // Debug line that prints the charcodes one per line for everything recieved over serial
      inByte = Serial.read(); // Read next byte
    }

    if (inByte == terminatingChar) //If we terminated properly
    {
      serialReadString[makeSerialStringPosition] = 0; //Null terminate the serialReadString (Overwrites last position char (terminating char) with 0


       if (strcmp(serialReadString, "synctime") == 0) {
        Serial.println("reset time synced");
        TimeIsSynced = false;
      }

      if (strcmp(serialReadString, "temp") == 0) {
        float temperature = getVoltage(tPin);
        temperature = (temperature - .5) * 100;
        Serial.println(temperature);
      }

      if (strcmp(serialReadString, "h") == 0) {
        digitalClockDisplay();
      }

      if (strcmp(serialReadString, "ledon") == 0) digitalWrite(ledPin, HIGH);
      if (strcmp(serialReadString, "ledoff") == 0) digitalWrite(ledPin, LOW);
      if (strcmp(serialReadString, "l0on") == 0) {
        digitalWrite(ledPin, HIGH);
        setRegisterPin(0, HIGH);
      }
      if (strcmp(serialReadString, "l0off") == 0) {
        digitalWrite(ledPin, LOW);
        setRegisterPin(0, LOW);
      }

      if (strcmp(serialReadString, "l7on") == 0) {
        digitalWrite(ledPin, HIGH);
        setRegisterPin(7, HIGH);
      }
      if (strcmp(serialReadString, "l7off") == 0) {
        digitalWrite(ledPin, LOW);
        setRegisterPin(7, LOW);
      }

      if (strcmp(serialReadString, "l2on") == 0) digitalWrite(ledPin2, HIGH);
      if (strcmp(serialReadString, "l2off") == 0) digitalWrite(ledPin2, LOW);

      if (strcmp(serialReadString, "allon") == 0){
      setRegisterPin(0, HIGH);
      setRegisterPin(1, HIGH);
      setRegisterPin(2, HIGH);
      setRegisterPin(3, HIGH);
      setRegisterPin(4, HIGH);
      setRegisterPin(5, HIGH);
      setRegisterPin(6, HIGH);
      setRegisterPin(7, HIGH);      
      }
      if (strcmp(serialReadString, "alloff") == 0){
      setRegisterPin(0, LOW);
      setRegisterPin(1, LOW);
      setRegisterPin(2, LOW);
      setRegisterPin(3, LOW);
      setRegisterPin(4, LOW);
      setRegisterPin(5, LOW);
      setRegisterPin(6, LOW);
      setRegisterPin(7, LOW);      
      }      

      writeRegisters();  //MUST BE CALLED TO DISPLAY CHANGES
      digitalClockDisplay();
    }
  }
}

// use for temperature TMP36
float getVoltage(int pin){
  return (analogRead(pin) * .004882814);
}

// REGISTER function above

//set an individual register pin HIGH or LOW
void setRegisterPin(int index, int value){
  registers[index] = value;
}

//Set and display registers
//Only call AFTER all values are set how you would like (slow otherwise)
void writeRegisters(){

  digitalWrite(RCLK_Pin, LOW);

  for(int i = numOfRegisterPins - 1; i >=  0; i--){
    digitalWrite(SRCLK_Pin, LOW);

    int val = registers[i];

    digitalWrite(SER_Pin, val);
    digitalWrite(SRCLK_Pin, HIGH);

  }
  digitalWrite(RCLK_Pin, HIGH);

}

// set all register pins to LOW
void clearRegisters(){
  for(int i = numOfRegisterPins - 1; i >=  0; i--){
     registers[i] = LOW;
  }
}

////// Time management
void digitalClockDisplay(){
  // digital clock display of the time
  Serial.print(hour());
  printDigits(minute());
  printDigits(second());
  Serial.print(" ");
  Serial.print(day());
  Serial.print(" ");
  Serial.print(month());
  Serial.print(" ");
  Serial.print(year());
  Serial.println();
}
void printDigits(int digits){
  // utility function for clock display: prints preceding colon and leading 0
  Serial.print(":");
  if(digits < 10)
    Serial.print('0');
  Serial.print(digits);
}

// functions to be called when an alarm triggers:
void MorningAlarm(){
  Serial.println("Alarm: - turn lights on");  
      setRegisterPin(0, HIGH);
      setRegisterPin(1, HIGH);
      setRegisterPin(2, HIGH);
      setRegisterPin(3, HIGH);
      setRegisterPin(4, HIGH);
      setRegisterPin(5, HIGH);
      setRegisterPin(6, HIGH);
      setRegisterPin(7, HIGH);
      writeRegisters();
}

void AllOn(){


        setRegisterPin(0, HIGH);
        setRegisterPin(1, HIGH);
        setRegisterPin(2, HIGH);
        setRegisterPin(3, HIGH);
        setRegisterPin(4, HIGH);
        setRegisterPin(5, HIGH);
        setRegisterPin(6, HIGH);
        setRegisterPin(7, HIGH);

      writeRegisters();
}

void AllOff(){

        setRegisterPin(0, LOW);
        setRegisterPin(1, LOW);
        setRegisterPin(2, LOW);
        setRegisterPin(3, LOW);
        setRegisterPin(4, LOW);
        setRegisterPin(5, LOW);
        setRegisterPin(6, LOW);
        setRegisterPin(7, LOW);

      writeRegisters();
}

void processSyncMessage() {
  unsigned long pctime;
  const unsigned long DEFAULT_TIME = 1382035561 + (60 * 60 * 2); // Jan 1 2013

  setTime(DEFAULT_TIME);
  Serial.println("processSyncMessage default");
  digitalClockDisplay();

}


time_t requestSync()
{
  Serial.write(TIME_REQUEST);  
  return 0; // the time will be sent later in response to serial mesg
}