DumbArduino.ino

#include <FastLED.h>
#include <SPI.h>
#include <String.h>
#include <Wire.h>

#pragma region PIN_DEFINITIONS
#define GAME_START 3
#define GAME_END 4
#define SLAVE_ADDR 9
#define GAME_IRQ 8
#pragma endregion

#pragma region GLOBALS
int GAME_STATE = 0;  // 0 allows the loop to run, waiting for a card to be read
                     // in.  Increments 100, 200, 400 1 creates a loop, adding
                     // in scores and waiting for an endgame signal from Mega
bool PLAYERS_INITD = false;
byte firstN[18];
byte lastN[18];
byte blankN[18];
byte firstN_2[18];
byte lastN_2[18];
#pragma endregion


void receiveEvent() {
    int index = 0;

    // Read while data received
    while (0 < Wire.available()) {
        byte x = Wire.read();
        // First 18 bytes are first name [Player 1]
        if (index < 18) {
            firstN[index] = x;
        }
        // Next 18 bytes are last name [Player 1]
        else if (index < 36 && index > 18) {
            lastN[index - 18] = x;
        }
        // Next 18 bytes are first name [Player 2]
        else if (index < 54 && index > 36) {
            firstN_2[index - 36] = x;
        }
        // Next 18 bytes are last name [Player 2]
        else if (index < 72 && index > 54) {
            lastN_2[index - 54] = x;
        }
        index++;
    }

    // Print to Serial Monitor
    Serial.println("Receive event");

    // Set flag indicating we have names
    PLAYERS_INITD = true;
}

void setup() {
    // Initialize I2C as slave
    Wire.begin(SLAVE_ADDR);
    // Function to run when data received from master
    Wire.onReceive(receiveEvent);
    Serial.begin(9600);
    pinMode(GAME_START, OUTPUT);
    pinMode(GAME_END, INPUT);
    digitalWrite(GAME_START, LOW);
    attachInterrupt(digitalPinToInterrupt(GAME_IRQ), gameStartHandler, RISING);
}

void loop() {
    // We should enter this when RFID mega sends a signal to start the game
    if (GAME_STATE == 1) {
        Serial.println("GAME STARTED");
        // Wait until we have the player infos
        while (!PLAYERS_INITD) {
            Serial.println("Waiting for player initialization...");
            delay(50);
        }

        // Now we haz players?
        String firstName = String((char*)firstN);
        Serial.println("FIRST NAME [PLAYER 1]: ");
        Serial.println(firstName);

        String lastName = String((char*)lastN);
        Serial.println("LAST NAME [PLAYER 1]: ");
        Serial.println(lastName);

        String firstName2 = String((char*)firstN_2);
        Serial.println("FIRST NAME [PLAYER 2]: ");
        Serial.println(firstName2);

        String lastName2 = String((char*)lastN_2);
        Serial.println("LAST NAME [PLAYER 2]: ");
        Serial.println(lastName2);

        delay(10000);

        // Reset the names
        for (int i = 0; i < 18; i++) {
            firstN[i] = blankN[i];
            lastN[i] = blankN[i];
            firstN_2[i] = blankN[i];
            lastN_2[i] = blankN[i];
        }
    }
}

/**
 * This function triggers when master arduino says game should begin
 */
void gameStartHandler() {
    GAME_STATE = 1;
}