File content as of revision 67:39b9ba6019b0:

/*
ELEC2645 Embedded Systems Project
School of Electronic & Electrical Engineering
University of Leeds
Name: Ahmed Nomaan Adamjee
Username: el17ana
Student ID Number: 201161436
Date:
*/

///////// pre-processor directives ////////
#include "mbed.h"
#include "Gamepad.h"
#include "N5110.h"
#include "FXOS8700CQ.h"
#include "StartScreen.h"
#include "SnakevsBlock.h"
#include "SDFileSystem.h"

/////////////// objects ///////////////
N5110 lcd(PTC9,PTC0,PTC7,PTD2,PTD1,PTC11);
Gamepad pad;
FXOS8700CQ device(I2C_SDA,I2C_SCL);
StartScreen _start;
Stats _stats;
SnakevsBlock _game;
AnalogIn noisy(PTB0); //This creates a random noise which I can use to seed the random numbers.
// Connections to SD card holder on K64F (SPI interface)
SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd"); // MOSI, MISO, SCK, CS
//Serial serial(USBTX, USBRX);  // for PC debug

///////////// prototypes //////////////
void init();
void refresh_game();
void read_write_stats();
void _set_mode_speed();

//Constants//
int fps = 40;  // frames per second, this will be changed in menu.
int g_mode = 1; //selects between joystick and motion control.
int back; //this allows us to use the back key to exit the game loop;

///////////// MAIN ////////////////
int main()
{
    init();
    _start.titleScreen(lcd, pad);
    while(1)  { //This loop is created for Play/Continue configuration
        read_write_stats();
        _start.menu(lcd, pad);  // this takes us to main menu inside startscreen, and connects automatically to all other menu functions.
        _set_mode_speed();
        // start the game
        _start.credits(lcd); // this is after the menu to allow us to hide credits if we want to play the game without wasting any time.
        refresh_game();
        wait(1.0f/fps);

        // snakeVSblock - detect input respect to the menu options, and update data and refresh screen
        while (1) {

            _game.read_input(pad, device, g_mode); //this reads the angle or joystick direction, on the condition of either of them being selected.
            _game.update(lcd, pad); //updates the game screen and checks for any collisions.
            refresh_game();
            
            //the int back stores the value 1 if back is pressed inside the update function of snakevsblock,
            //This function also handles level progression and level failure operations by using the class WinLoose.
            back = _game.CheckGameProgression(lcd, pad, sd); //and also sends relevant data to the sd card to implement stats functionality.

            if(back)  {
                break;    //and this allows us to return to main menu by using the keyword break.
            }

            wait(1.0f/fps);
        }
    }
}

void init()
{
    // need to initialise LCD and Gamepad
    lcd.init(); //init for the N5110 Library.
    device.init(); //init for the FXOS8700CQ Library.
    pad.init(); //init for the Gamepad Library.
    _game.init(); //init for the SnakeVSBlock Class.
    _start.init(); //init for the Menu Class --> StartScreen.
    srand(100000*noisy.read_u16()); //seeds the random number generator with a random noise from the K64F.
}

void refresh_game()
{
    lcd.clear();  //clears the N5110 screen for the next frame
    _game.draw(lcd, pad); //draws the next game frame
    _game.get_pos(); //takes the game object coordinates and saves it privately to use later for implementing collisions.
    lcd.refresh();  //refreshes the N5110 screen to display the frame.
}

void read_write_stats()
{
    _start.read_stats(sd); //this is to save the current highest level in the stats class that can be used in menu.
    _stats.write(1, sd); //this tells the stats class that the game has started from level 1;
}

void _set_mode_speed()
{
    fps = _start.fps; // sets the frames per second required, selected from the game speed menu.
    g_mode = _start.g_mode;// allows us to pass this information on to the snakevsblock class, to set the controls to either joystick or motion control.
    
    if (g_mode == 2) {  //show instructions to handle motion control.
        _start.motionControlInstructions(lcd);    //this only comes up on the screen is the user selects motion control from menu options.
    }
}