File content as of revision 0:65ed62dbfeee:

#include "mbed.h"
#include "uLCD_4DGL.h"
#include "questions.h"

DigitalOut myled1(LED1); // leds for debugging
DigitalOut myled2(LED2);
DigitalOut myled3(LED3);
DigitalOut myled4(LED4);

DigitalOut lidar_enable(p29); //to determine when lidar should operate

DigitalIn p1_enable(p23); // data from player 1
BusIn p1_ans(p22, p21);

DigitalIn p2_enable(p18); // data from player 2
BusIn p2_ans(p19, p20);

uLCD_4DGL uLCD(p13, p14, p12);

Serial pc(USBTX,USBRX); // for teraterm debugging

PwmOut speaker(p26);

int msg;
int msg2;
int questionIndex = 0;
string *p;
int player = 0;

int player1Score = 0;
int player2Score = 0;

int p1Val = 0;
int p2Val = 0;

questions arr[30];

// Light
class RGBLed
{
public:
    RGBLed(PinName redpin, PinName greenpin)://, PinName bluepin);
    _redpin(redpin), _greenpin(greenpin) //, _bluepin(bluepin)
    {
        //50Hz PWM clock default a bit too low, go to 2000Hz (less flicker)
        _redpin.period(0.0005);
    }

    void write(float red,float green)//, float blue);
    {
        _redpin = red;
        _greenpin = green;
//    _bluepin = blue;
    }
private:
    PwmOut _redpin;
    PwmOut _greenpin;
//    PwmOut _bluepin;
};


//class could be moved to include file


//Setup RGB led using PWM pins and class
RGBLed myRGBled(p24,p25);//,p21); //RGB PWM pins

void shuffleQuestions()
{
    for (int i = 0; i < 90; i++) {
        int rand1 = rand() % 30;
        int rand2 = rand() % 30;
        questions temp = arr[rand1];
        arr[rand1] = arr[rand2];
        arr[rand2] = temp;
    }
}

void addQuestions()
{
    questions q1("Which of these\nchess figures is\nclosely related to'Bohemian\nRhapsody?\n","King","Queen","Pawn","Bishop","Queen");
    questions q2("What religion is\nthe most practicedone in India?\n","Sikhism","Islam","Hinduism","Shinto","Hinduism");
    questions q3("What is the name\nof the Jewish New\nYear?\n","Yom Kippur","Kwanzaa","Hanukkah","Rosh Hashanah","Rosh Hashanah");
    questions q4("What funk/soul\nband was Lionel\nRichie a member\nof?\n","Commodores","Amigas","Ataris","Spectrums","Commodores");
    questions q5("Which country\nhosted the Summer\nOlympics in 2016?\n","Greece","Brazil","China","Spain","Brazil");
    questions q6("Which of these\ncities is closest\nto London, UK?\n","Boston, MA","Miami, FL","Atlanta, GA","New York, NY","Boston, MA");
    questions q7("What did Alfred\nNobel Develop?\n","Atomic bomb","Nobelium","Gunpowder","Dynamite","Dynamite");
    questions q8("Which US Presidentis on the far leftof the Mount\nRushmore\nNational\nMemorial?\n","Theodore\n   Roosevelt","Thomas\n   Jefferson","George\n   Washington","Abraham\n   Lincoln","George\n   Washington");
    questions q9("Which actress\nplays a major\nrole in the TV\nshow 'The Big\nBang Theory'\n","Portia de\n   Rossi","Kaley Cuoco","Emily\n   Deschanel","Sofia Vergara","Kaley Cuoco");
    questions q10("Which of these\nantagonist\ncharacters was\ncreated by\nnovelist J.K.\nRowling?\n","Professor\n   Moriarty","Lord Voldemort","Darth Vader","Lord Farqaad","Lord Voldemort");
    questions q11("Which mammal firstreached Earth's\norbit alive?\n","Monkey","Human","Cat","Dog","Dog");
    questions q12("How many spaces\nare on a standard\nmonopoly board?\n","40","20","80","60","40");
    questions q13("Which actor does\nnot appear in\n'Saving Private\nRyan'?\n","Tom Hanks","Vin Diesel","Giovanni\n   Ribisi","Ralph Fiennes","Ralph Fiennes");
    questions q14("Which city's\nlandmard include:\nThe Pantheon, The\nSpanish Steps and\nTrevi Fountain?\n","Rome","Athens","Istanbul","Barcelone","Rome");
    questions q15("How many blue\nstripes does the\nUnited States of\nAmerica national\nflag have?\n","13","6","0","7","0");
    questions q16("Which of these\ncountries was not\na Soviet Republic\nin USSR?\n","Moldova","Serbia","Kyrgyzstan","Azerbaijan","Serbia");
    questions q17("What temperature\nis the same in\nCelsius and\nFahrenheit?\n","0","-40","+100","+40","-40");
    questions q18("What is the name\nof the boxer whoselife story is\ndepicted in the\n1999 movie 'The\nHurricane'?\n","Rubin Carter","Jake LaMotta","Muhammad Ali","Rocky Marciano","Rubin Carter");
    questions q19("Adele performed\nthe theme song to\nwhich James Bond\nfilm?\n","Casino Royale","From Russia\n   With Love","Quantum of\n   Solace","Skyfall","Skyfall");
    questions q20("What restaurant\nfranchise advises\nyou to 'Eat\nFresh'?\n","Subway","McDonald's","KFC","Taco Bell","Subway");
    questions q21("In which language\nwas the book 'War\nand Peace' originally written?\n", "Russian","English","French","German","Russian");
    questions q22("Which movie was\nthe first to win\n11 Academy\nAwards?\n","Sound of Music","La La Land","Ben-Hur","Titanic","Ben-Hur");
    questions q23("What is the\nlargest country,\nby area, that has\nonly one time\nzone?\n", "China","Russia","Australia","Turkey","China");
    questions q24("Which truck is\nproduced by the\nFord Motor\nCompany?\n", "Silverado 1500","CR-V","F-150","RAV4","F-150");
    questions q25("What is the\nlargest planet in our Solar System?\n","Pluto","Earth","Saturn","Jupiter","Jupiter");
    questions q26("Other than eggs,\nwhat is a primary\ningredient in\nEggs Florentine?\n", "Avocado","Gorgonzola","Spinach","Ham","Spinach");
    questions q27("According to\nPersian folklore,\nwho is the\nstoryteller of\n'One Thousand and\nOne Nights'?\n","Kanaan","Hatshepsut","Homer","Scheherazade","Scheherazade");
    questions q28("Which of these\nNBA franchises\nhas never signed\nLeBron James?\n", "Miami Heat","Los Angeles\n   Lakers","Cleveland\n   Cavaliers","Boston Celtics","Boston Celtics");
    questions q29("What is the color\nof Donald Duck's\nbowtie?\n","Yellow","Green","Red","Blue","Red");
    questions q30("What was the\nfirst successful\nvaccine developed\nin history?\n","Smallpox","Rabies","Cholera","Scarlet Fever","Smallpox");

    arr[0] = q1;
    arr[1] = q2;
    arr[2] = q3;
    arr[3] = q4;
    arr[4] = q5;
    arr[5] = q6;
    arr[6] = q7;
    arr[7] = q8;
    arr[8] = q9;
    arr[9] = q10;
    arr[10] = q11;
    arr[11] = q12;
    arr[12] = q13;
    arr[13] = q14;
    arr[14] = q15;
    arr[15] = q16;
    arr[16] = q17;
    arr[17] = q18;
    arr[18] = q19;
    arr[19] = q20;
    arr[20] = q21;
    arr[21] = q22;
    arr[22] = q23;
    arr[23] = q24;
    arr[24] = q25;
    arr[25] = q26;
    arr[26] = q27;
    arr[27] = q28;
    arr[28] = q29;
    arr[29] = q30;
}

void readQuestion()
{
    arr[questionIndex].shuffleOptions();
    //uLCD.cls();
    uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
    uLCD.locate(0,0);
    uLCD.printf(arr[questionIndex].getQuestion().c_str());
    p = arr[questionIndex].getAllOptions();
    uLCD.printf("\n1: ");
    uLCD.printf((*(p)).c_str());
    uLCD.printf("\n2: ");
    uLCD.printf((*(p+1)).c_str());
    uLCD.printf("\n3: ");
    uLCD.printf((*(p+2)).c_str());
    uLCD.printf("\n4: ");
    uLCD.printf((*(p+3)).c_str());
}

int main()
{
    uLCD.baudrate(3000000); // lcd settings + randomize questions
    srand(time(NULL));
    addQuestions();
    shuffleQuestions();
    uLCD.display_control(PORTRAIT);

    while(1) {
        if (questionIndex == 30) {
            uLCD.filled_rectangle(0, 0, 130, 130, BLACK); //game over + win screen
            uLCD.locate(0,0);
            uLCD.printf("The game is over;");
            wait(2);
            uLCD.locate(0,2);
            uLCD.printf("Player 1: %d", player1Score);
            uLCD.locate(0,4);
            uLCD.printf("Player 2: %d", player2Score);
            wait(3);
            // gameover....
            uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
            uLCD.locate(1,6);
            if (player1Score > player2Score) {
                uLCD.printf("PLAYER 1 WINS!!!");
            } else if (player1Score < player2Score) {
                uLCD.printf("PLAYER 2 WINS!!!");
            } else {
                uLCD.locate(3,6);
                uLCD.printf("IT'S A TIE!!!");
            }
        } else {
            readQuestion(); //print questions
            lidar_enable = 1; // tell players that lidar can now work as buzzer
        }
        while ((!p1Val)&&(!p2Val)) {
            msg = -1;
            msg2 = -1;

            if (p1_enable) { //if player 1 is ready
                p1Val = p1_enable;
                myled1 = !myled1;
                msg = (p1_ans + 1); //answer from player mbeds + 1 to make it numbers between 1-4
                while (msg < 1);
                //checking if answer is right
                if (msg == 1) {
                    if ((*(p)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0); // 500hz period 
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score++;
                        p1Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score--;
                        p1Val = 1;
                        break;
                    }
                } else if (msg == 2) {
                    if ((*(p+1)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0);// 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score++;
                        p1Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score--;
                        p1Val = 1;
                        break;
                    }
                } else if (msg == 3) {
                    if ((*(p+2)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score++;
                        p1Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score--;
                        p1Val = 1;
                        break;
                    }
                } else if (msg == 4) {
                    if ((*(p+3)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score++;
                        p1Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player1Score--;
                        p1Val = 1;
                        break;
                    }
                }
            } else if (p2_enable) {
                p2Val = p2_enable;
                myled2 = !myled2;
                msg2 = (p2_ans + 1);
                while (msg2 < 1);
                if (msg2 == 1) {
                    if ((*(p)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        player2Score++;
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        p2Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player2Score--;
                        p2Val = 1;
                        break;
                    }
                } else if (msg2 == 2) {
                    if ((*(p+1)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player2Score++;
                        p2Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player2Score--;
                        p2Val = 1;
                        break;
                    }
                } else if (msg2 == 3) {
                    if ((*(p+2)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player2Score++;
                        p2Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player2Score--;
                        p2Val = 1;
                        break;
                    }
                } else if (msg2 == 4) {
                    if ((*(p+3)).compare(arr[questionIndex].getCorrectAnswer()) == 0) {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Correct");
                        myRGBled.write(0.0,1.0);
                        speaker.period(1.0/1000.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player2Score++;
                        p2Val = 1;
                        break;
                    } else {
                        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
                        uLCD.locate(0,0);
                        uLCD.printf("Incorrect");
                        myRGBled.write(1.0,0.0);
                        speaker.period(1.0/500.0); // 500hz period
                        speaker =0.5;
                        wait(1);
                        speaker =0.0;
                        player2Score--;
                        p2Val = 1;
                        break;
                    }
                }
            }
        }
        //reset all values
        wait(3);
        p1Val = 0;
        p2Val = 0;
        myled1 = 0;
        myled2 = 0;
        msg = -1;
        msg2 = -1;
        lidar_enable = 0;
        myRGBled.write(0.0,0.0);
        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
        uLCD.locate(0,0);
        uLCD.printf("Player 1: %d", player1Score);
        uLCD.locate(0,2);
        uLCD.printf("Player 2: %d", player2Score);
        wait(2);
        uLCD.filled_rectangle(0, 0, 130, 130, BLACK);
        questionIndex++;
    }
}