File content as of revision 10:83c5333f5b16:

#include "mbed.h"
#include "Motor.h"
#include "rgbled.h"
#include "rgbSensor.h"

// Define devices
Motor left(p22, p16, p15); // pwm, fwd, rev
Motor right(p23, p19, p20); // pwm, fwd, rev
BusOut myled(LED1,LED2,LED3,LED4);
RGBLed myRGBled(p26, p25, p24); // red, green, blue
rgbSensor rgbsensor(p28, p27);
Serial blue(p13, p14); // serial tx, serial rx

//Game state variables
int progress = 0;
int current_item = 0;
bool holding_item = false;
bool itembox = false;
int speed;
int max_speed;
int acceleration;
int cstate;
bool collide = false;

// Global game actions
bool paused = false;
void check_unpause() {
    char bnum=0;
    char bhit=0;
    while (true) {
        if (blue.getc()=='B') { //button data packet
            bnum = blue.getc(); //button number
            bhit = blue.getc(); //1=hit, 0=release
            if (blue.getc()==char(~('!' + 'B' + bnum + bhit))) { //checksum OK?
                if (bnum == '1') { //number button 1, pause
                    if (bhit=='1') paused = false;
                }
            }
        }
    }
}

void game_paused() {
    // Cycle through LEDs
    Thread pause_thread;
    pause_thread.start(check_unpause);
    while (paused) {
        int num = 1;
        for (int i = 0; i < 3; i++) {
            num *= 2;
            myled = num;
            ThisThread::sleep_for(100);
        }
        ThisThread::sleep_for(500);
        for (int i = 3; i > 0; i--) {
            num /= 2;
            myled = num;
            ThisThread::sleep_for(100);
        }
        ThisThread::sleep_for(500);
    }
}  

// Thread for checking rgb sensor values and updating game variables
// Change later depending on behavior of RGB sensor and colors used
int thresh = 150;   //change this depending on RGB values
void check_RGB() {
    while(true){
        rgbsensor.update();
        int C_value = rgbsensor.get_C();
        int R_value = rgbsensor.get_R();
        int G_value = rgbsensor.get_G();
        int B_value = rgbsensor.get_B();
        if(C_value > thresh && R_value > thresh && G_value > thresh && B_value > thresh && current_item == 0) { //Check for if cart runs over an item box
            itembox = true;
            cstate = 0;
        }
        else if(C_value > thresh && R_value > thresh && G_value > thresh && B_value > thresh) {     //Check for if cart runs over a speed boost panel
            max_speed = 1;      //change this depending on speed up panel algs
            cstate = 0;
        }
        else if(C_value > thresh && R_value > thresh && G_value > thresh && B_value > thresh) {     //Check if cart collides with wall
            collide = true;
        }
        else if(C_value > thresh && R_value > thresh && G_value > thresh && B_value > thresh) {     //Check if cart reaches next checkpoint. cstate is set to 1 upon seeing first color of checkpoint
            cstate = 1;
        }
        else if(C_value > thresh && R_value > thresh && G_value > thresh && B_value > thresh && cstate == 1) {   
        //Second part of checking if cart reaches next checkpoint. If the previous color was passed through previously, updates checkpoint progress
            cstate = 0;
            progress++;
        }
        else {
            cstate = 0;
        }
        ThisThread::sleep_for(500);
    }
}

void set_item() {
    while(true){
        if(itembox && current_item == 0) {
            //playsound
            for(int n = 0, n < 10, n++){    //flash the led to simulate slot machine effect
                myRGBled(1.0,0.0,0.0);
                ThisThread::sleep_for(50);
                myRGBled(0.0,1.0,0.0);
                ThisThread::sleep_for(50);
                myRGBled(0.0,0.0,1.0);
                ThisThread::sleep_for(50);
                myRGBled(1.0,1.0,0.0);
                ThisThread::sleep_for(50);
            }
            current_item = rand() % 4 + 1;      //change this depending on items implemented and random item alg
            if(current_item == 1){          //mushroom
                myRGBled(1.0,0.0,0.0);
            }
            if(current_item == 2){          //green shell
                myRGBled(0.0,1.0,0.0);
            }
            if(current_item == 3){          //blue shell
                myRGBled(0.0,0.0,1.0);
            }
            if(current_item == 4){          //banana
                myRGBled(1.0,1.0,0.0);
            }
            itembox = false;
        }
        ThisThread::sleep_for(500);
    }
}

void hold_item() {
    if(current_item == 0){
        return;
    }
    if(current_item == 1){
        max_speed = 1;
        current_item = 0;
    }
    else{
        holding_item = true;
    }
    return;
}

void release_item(){
    holding_item = false;
    if(current_item == 2){
        //hit player in front
        return;
    }
    if(current_item == 3){
        //hit player in first
        return;
    }
    if(current_item == 4){
        //hit player behind
        return;
    }
}

// Define threads
Thread thread1;

int main() {
    // Start threads
    thread1.start(check_RGB);
    
    // Bluetooth controller code
    char bnum=0;
    char bhit=0;
    while(1) {
        if (blue.getc()=='!') {
            if (blue.getc()=='B') { //button data packet
                bnum = blue.getc(); //button number
                bhit = blue.getc(); //1=hit, 0=release
                if (blue.getc()==char(~('!' + 'B' + bnum + bhit))) { //checksum OK?
                    switch (bnum) {
                        case '1': //number button 1, pause
                            if (bhit=='1') {
                                //myled = bnum - '0'; //current button number will appear on LEDs
                                paused = true;
                                game_paused();
                            }
                            break;
                        case '2': //number button 2, accelerate
                            if (bhit=='1') {
                                myled = bnum - '0'; //current button number will appear on LEDs
                                left.speed(1.0);
                                right.speed(1.0);
                            } else {
                                left.speed(0.0);
                                right.speed(0.0);
                            }
                            break;
                        case '3': //number button 3, use item
                            if (bhit=='1') {
                                hold_item();
                            } else {
                                release_item();
                            }
                            break;
                        case '4': //number button 4, brakes
                            if (bhit=='1') {
                                //myled = bnum - '0'; //current button number will appear on LEDs
                                //add hit code here
                            } else {
                                //add release code here
                            }
                            break;
                        case '5': //button 5 up arrow
                            if (bhit=='1') {
                                //myled = bnum - '0'; //current button number will appear on LEDs
                                //throw_item();
                                //item_box();
                            } else {
                                
                            }
                            break;
                        case '6': //button 6 down arrow
                            if (bhit=='1') {
                                myled = bnum - '0'; //current button number will appear on LEDs
                                left.speed(-1.0);
                                right.speed(-1.0);
                            } else {
                                left.speed(0.0);
                                right.speed(0.0);
                            }
                            break;
                        case '7': //button 7 left arrow
                            if (bhit=='1') {
                                //myled = bnum - '0'; //current button number will appear on LEDs
                                left.speed(0.3);
                                right.speed(1.0);
                            } else {
                                left.speed(0.0);
                                right.speed(0.0);
                            }
                            break;
                        case '8': //button 8 right arrow
                            if (bhit=='1') {
                                //myled = bnum - '0'; //current button number will appear on LEDs
                                left.speed(1.0);
                                right.speed(0.3);
                            } else {
                                left.speed(0.0);
                                right.speed(0.0);
                            }
                            break;
                        default:
                            break;
                    }
                }
            }
        }
    }
}