// Sisteme cu microprocesoare - Laborator 3
// 8 LED-uri cu registru de deplasare 74HC595

const int latchPin = 4;
const int clockPin = 3;
const int dataPin = 2;

void setup() {
  pinMode(latchPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  Serial.begin(9600);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 0);
  digitalWrite(latchPin, HIGH);
}

void loop() {
  int alege = 0;
  Serial.println("Joc de lumini");
  Serial.println("Alegeti varianta de joc (1-4)");
  while (alege < '1' || alege > '4') {
    alege = Serial.read();
    delay(1000);
  }
  alege = alege - 48;
  Serial.print("Ati ales jocul: ");
  Serial.print(alege,DEC);
  Serial.println();
  Serial.println("Pentru reinitializare apasati butonul Reset al placii");
  switch (alege) {
    case 1:
      joc1();
      break;
    case 2:
      joc2();
      break;
    case 3:
      joc3();
      break;
    case 4:
      joc4();
      break;
  }
}

void joc1() {
  while (1) {
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, 170);
    digitalWrite(latchPin, HIGH);
    delay(1000);
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, 85);
    digitalWrite(latchPin, HIGH);
    delay(1000);
  }
}

void joc2() {
  int afisare = 0;
  while (1) {
    for (int i = 0; i < 9; i++) {
      afisare = afisare + (1 << i);
      digitalWrite(latchPin, LOW);
      shiftOut(dataPin, clockPin, MSBFIRST, afisare);
      digitalWrite(latchPin, HIGH);
      delay(500);
    }
    for (int i = 8; i > -1; i--) {
      afisare = afisare - (1 << i);
      digitalWrite(latchPin, LOW);
      shiftOut(dataPin, clockPin, MSBFIRST, afisare);
      digitalWrite(latchPin, HIGH);
      delay(500);
    }
  }
}

void joc3() {
  int afisare = 1;
  while (1) {
    for (int i = 0; i < 8; i++) {
      digitalWrite(latchPin, LOW);
      shiftOut(dataPin, clockPin, MSBFIRST, afisare << i);
      digitalWrite(latchPin, HIGH);
      delay(500);
    }
  }
}

void joc4() {
  int configuratie;
  while (1) {
    configuratie = random(0, 256);
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, configuratie);
    digitalWrite(latchPin, HIGH);
    delay(100);
  }
}