File content as of revision 3:5746c6833d73:

///////////// includes /////////////////////
#include "mbed.h"
#include "platform/mbed_thread.h"
#include "Joystick.h"
#include "N5110.h"
#include "ShiftReg.h"  
#include "PongEngine.h"
#include "Utils.h"
///////////// defines /////////////////////
#define PADDLE_WIDTH 2
#define PADDLE_HEIGHT 8
#define BALL_SIZE 2
#define BALL_SPEED 3
///////////// objects ///////////////////
N5110 lcd(p14,p8,p9,p10,p11,p13,p21);
Joystick joystick(p20,p19);
DigitalIn buttonA(p29);
BusOut leds(LED4,LED3,LED2,LED1);
ShiftReg seven_seg;
PongEngine pong;
AnalogIn pot(p17); 
///////////// prototypes ///////////////
void init();
void render();
void welcome();
void display_lives(int lives);
void game_over();
////////////////////////////////////////

int main() {
    init();      // initialise devices and objects
    welcome();   // waiting for the user to start 
    render();    // first draw the initial frame 
    int fps = 10;
    thread_sleep_for(1000/fps);  // and wait for one frame period - millseconds
    
    int lives = 4;   // display lives on LEDs
    display_lives(lives);
    
    while (lives > 0) {  // keep looping while lives remain
        // read the joystick input and store in a struct
        UserInput input = {joystick.get_direction(),joystick.get_mag()};
        lives = pong.update(input);   // update the game engine based on input
        display_lives(lives);         // display lives on LEDs    
        render();                     // draw frame on screen
        thread_sleep_for(1000/fps);         // and wait for one frame period - ms
    }   
    game_over();
}

void init() {
    seven_seg.write(0x00);  // turn of 7-seg display
    lcd.init();
    lcd.setContrast(0.5);
    joystick.init();
    pong.init(0,8,2,2,2);     // paddle x position, paddle_height,paddle_width,ball_size,speed
}

void render() {  // clear screen, re-draw and refresh
    lcd.clear();  
    pong.draw(lcd);
    lcd.refresh();
}

void welcome() { // splash screen
    lcd.printString("     Pong!    ",0,1);  
    lcd.printString("    Press A   ",0,4);
    lcd.refresh();
     
    // wait flashing LEDs until button A is pressed 
    while (buttonA.read() == 0) {
        leds = 0b1111;
        thread_sleep_for(100);
        leds = 0b0000;
        thread_sleep_for(100);   
    }
}

void display_lives(int lives) {
    if (lives == 4) {
        leds = 0b1111;
        seven_seg.write(0x66);
    } else if (lives == 3) {
        leds = 0b1110;
        seven_seg.write(0x4F);
    } else if (lives == 2) {
        leds = 0b1100;
        seven_seg.write(0x5B);
    } else if (lives == 1) {
        leds = 0b1000;
        seven_seg.write(0x06);
    } else {
        leds = 0b0000;
        seven_seg.write(0x3F);
    }
}

void game_over() { // splash screen 
    while (1) {
        lcd.clear();
        lcd.printString("  Game Over ",0,2);  
        lcd.printString("    Loser!  ",0,4);
        lcd.refresh();
        leds = 0b1111;
        thread_sleep_for(250);
        lcd.clear();
        lcd.refresh();
        leds = 0b0000;
        thread_sleep_for(250);   
    }
}