eggtimer

int potpin = 0;
int ledPin = 13;
int Botao = 2; //botao no pino 2
int EstadoBotao = 0; //Variavel para ler o status do pushbutton
int potvalor = 0;
int potvalorfinal = 0;
int minutos = 0;
int segundostotal = 0;
int segundos = 0;
int Buzzer = 10;
int minutosfinal = 0;
int nbrshow = 0;
int nbratual = 0;

String stringmin, stringsec, stringtotal;

const int  g_pinCommLatch = 6;
const int  g_pinClock     = 7;
const int  g_pinData    = 4;
byte g_digits [10];
int g_numberToDisplay = 0;
const int g_registers = 3;


byte g_registerArray [g_registers];

void setup(){
  pinMode(ledPin, OUTPUT); //Pino do led será saída
  pinMode(Botao, INPUT); //Pino com botão será entrada
  pinMode(Buzzer, OUTPUT);
  pinMode (g_pinCommLatch, OUTPUT);
  pinMode (g_pinClock, OUTPUT);
  pinMode (g_pinData, OUTPUT);
  digitalWrite(Botao, HIGH); //Ativa Pull-up
  Serial.begin(9600);
  g_digits [0] = 8 + 4 + 2 + 64 + 32 + 1;
  g_digits [1] = 4 + 2;
  g_digits [2] = 8 + 4 + 16 + 32 + 64;
  g_digits [3] = 8 + 4 + 16 + 2 + 64;
  g_digits [4] = 1 + 16 + 4 + 2;
  g_digits [5] = 8 + 1 + 16 + 2 + 64;
  g_digits [6] = 8 + 1 + 16 + 2 + 64 + 32;
  g_digits [7] = 8 + 4 + 2;
  g_digits [8] = 8 + 4 + 2 + 64 + 32 + 1 + 16;
  g_digits [9] = 8 + 4 + 2 + 1 + 16 + 64;
}
void sendSerialData (
byte registerCount,  // How many shift registers?
byte *pValueArray)   // Array of bytes with LSByte in array [0]
{
  // Signal to the 595s to listen for data
  digitalWrite (g_pinCommLatch, LOW);

  for (byte reg = registerCount; reg > 0; reg--)
  {
    byte value = pValueArray [reg - 1];

    for (byte bitMask = 128; bitMask > 0; bitMask >>= 1)
    {
      digitalWrite (g_pinClock, LOW);

      digitalWrite (g_pinData, value & bitMask ? HIGH : LOW);

      digitalWrite (g_pinClock, HIGH);
    }
  }
  // Signal to the 595s that I'm done sending
  digitalWrite (g_pinCommLatch, HIGH);
}
void countdown(){
  while (segundos > 0 || minutos > 0){
    delay(1000);
    Serial.print("Tempo: ");
    Serial.print(minutos);
    Serial.print(":");
    Serial.println(segundos);
    segundos = segundos--;
    nbratual = (minutos * 100) + segundos;
    g_numberToDisplay = nbratual;

    if (g_numberToDisplay < 10)
    {
      g_registerArray [3] = g_digits [0];
      g_registerArray [2] = g_digits [0];
      g_registerArray [1] = g_digits [0];
      g_registerArray [0] = g_digits [g_numberToDisplay];
    }
    else if (g_numberToDisplay < 100)
    {
      g_registerArray [3] = g_digits [0];
      g_registerArray [2] = g_digits [0];
      g_registerArray [1] = g_digits [g_numberToDisplay / 10];
      g_registerArray [0] = g_digits [g_numberToDisplay % 10];
    }
    else if (g_numberToDisplay < 1000)
    {
      g_registerArray [3] = g_digits [0];
      g_registerArray [2] = g_digits [g_numberToDisplay / 100];
      g_registerArray [1] = g_digits [(g_numberToDisplay % 100) / 10];
      g_registerArray [0] = g_digits [g_numberToDisplay % 10];
    }
    else
    {
      g_registerArray [3] = g_digits [g_numberToDisplay / 1000];
      g_registerArray [2] = g_digits [(g_numberToDisplay % 1000) / 100];
      g_registerArray [1] = g_digits [(g_numberToDisplay % 100) / 10];
      g_registerArray [0] = g_digits [g_numberToDisplay % 10];
    }
    sendSerialData (g_registers, g_registerArray);
    if (segundos == 0){
      if (minutos > 0){
        minutos = minutos--;
        segundos = 60;
      }
      else {
        Serial.println("Acabou!!");
        digitalWrite(ledPin, HIGH);
        digitalWrite(Buzzer, HIGH);
        delay(500);
        digitalWrite(Buzzer, LOW);
        delay(500);
        digitalWrite(Buzzer, HIGH);
        delay(500);
        digitalWrite(Buzzer, LOW);
        delay(500);
        digitalWrite(Buzzer, HIGH);
        delay(500);
        digitalWrite(Buzzer, LOW);
        delay(500);
        digitalWrite(Buzzer, HIGH);
        delay(500);
        digitalWrite(Buzzer, LOW);
      }
    }
  }
}

void loop(){
  EstadoBotao = digitalRead(Botao);
  potvalor = map(analogRead(potpin), 0, 1023, 1, 301);
  segundostotal = potvalor;
  minutos = segundostotal / 60;
  segundos = segundostotal - (minutos*60);
  minutosfinal = minutos * 100;
  nbrshow = minutosfinal + segundos;
  g_numberToDisplay = nbrshow;

    if (g_numberToDisplay < 10)
    {
      g_registerArray [3] = g_digits [0];
      g_registerArray [2] = g_digits [0];
      g_registerArray [1] = g_digits [0];
      g_registerArray [0] = g_digits [g_numberToDisplay];
    }
    else if (g_numberToDisplay < 100)
    {
      g_registerArray [3] = g_digits [0];
      g_registerArray [2] = g_digits [0];
      g_registerArray [1] = g_digits [g_numberToDisplay / 10];
      g_registerArray [0] = g_digits [g_numberToDisplay % 10];
    }
    else if (g_numberToDisplay < 1000)
    {
      g_registerArray [3] = g_digits [0];
      g_registerArray [2] = g_digits [g_numberToDisplay / 100];
      g_registerArray [1] = g_digits [(g_numberToDisplay % 100) / 10];
      g_registerArray [0] = g_digits [g_numberToDisplay % 10];
    }
    else
    {
      g_registerArray [3] = g_digits [g_numberToDisplay / 1000];
      g_registerArray [2] = g_digits [(g_numberToDisplay % 1000) / 100];
      g_registerArray [1] = g_digits [(g_numberToDisplay % 100) / 10];
      g_registerArray [0] = g_digits [g_numberToDisplay % 10];
    }
    sendSerialData (g_registers, g_registerArray);

  if (EstadoBotao == HIGH){ //Se botão estiver pressionado (LOW)
    digitalWrite(ledPin, HIGH); // acende o led do pino 13.
    potvalorfinal = potvalor;
    delay(500);

    segundostotal = potvalorfinal;
    minutos = segundostotal / 60;
    segundos = segundostotal - (minutos*60);

    Serial.print("analogRead: ");
    Serial.println(analogRead(potpin));

    Serial.print("potvalor: ");
    Serial.println(potvalor);

    Serial.print("Segundos: ");
    Serial.println(segundostotal);
    Serial.println();

    Serial.print("Tempo: ");
    Serial.print(minutos);
    Serial.print(":");
    Serial.println(segundos);

    countdown();
  }
}