File content as of revision 11:f6a39ae5ecbc:

// Hello World! for the TextLCD

#include "mbed.h"
#include <string>
#include "TextLCD.h"
#include "MaxSonar.h"
using std::string;

TextLCD lcd(PTE30, PTE29, PTE23, PTE22, PTE21, PTE20); // rs, e, d4-d7

DigitalOut questionScreen(PTE3);
DigitalOut screen1(PTE5);
DigitalOut screen2(PTE4);

//All functions for controlling screens
void UpdateScreen(DigitalOut screen, string text);
void UpdateScreen(DigitalOut screen, char text[1024]);
void UpdateScreen(DigitalOut screen, int firstLineLocation, string firstLineText, int secondLineLocation, string secondLineText);
string GetLocationSpaces(int location);
void ClearAllScreen();

//All funcitons for range sensors
void UpdateRange();

//All functions for menu page
void GameOption();
void StartGame(int gameOptionLocation);

//All functions for exit screen menu
bool ExitScreen();
bool CheckExit(float r1, float r2);

//all functions for Multi-Maths game
void MultiChoice();
void DisplayNewQuestion();
bool CheckCorrect(int screenNumber);

string questions[4] = {"What is 2*2?", 
                        "What is 5*2?", 
                        "what is 2+2?",
                        "What is 5*4?"};

string screen1Answers[4] = {"4    ", "10    ", "5    ", "18    "};
string screen2Answers[4] = {"5    ", "8    ", "4    ", "20    "};
int correctScreen[4] = {1, 1, 2, 2}; //1 = screen1; 2 = screen2;

int questionCount = 0;

//all functions for pong game
void Pong();

MaxSonar *range1;
    float r1;
    
    MaxSonar *range2;
    float r2;
int main() {
    
    UpdateScreen(questionScreen, 5, "0", 7, "___");
    
    /*questionScreen = 1;
    
    for(int i = 0; i < 10; i++){
        lcd.cls();
        lcd.locate(2, 0);
        lcd.printf("0");
        lcd.locate(2, 1);
        lcd.printf("===");
    }*/
    wait(5);
    
    // Create and configure object for 3.3V powered LV-series device, 
    // accessed with analog reads (in cm) on p16, triggered by p7.
    range1 = new MaxSonar(MS_LV, MS_ANALOG, PTB8, PTC2);
    range1->setVoltage(3.3);
    range1->setUnits(MS_CM);
    
    range2 = new MaxSonar(MS_LV, MS_ANALOG, PTB9, PTB3);
    range2->setVoltage(3.3);
    range2->setUnits(MS_CM);
    
    ClearAllScreen();
    
    GameOption();
}

int gameOptionLocation = 0;
string gameName[2] = {"Muti-Maths", "Pong!"};
void GameOption()
{
    ClearAllScreen();
    
    UpdateScreen(questionScreen, "Select a game:  >" + gameName[gameOptionLocation]);
    
    bool gameOption = true;    
    while(gameOption)
    {
        UpdateRange();
        
        if(r1 < 25 && r2 < 25)
        {
            UpdateScreen(questionScreen, "Entering " + gameName[gameOptionLocation] + ".....");
            wait(1);
            
            gameOption = false;
        }
        
        else if(r1 < 20)
        {
            if(gameOptionLocation > 0) { gameOptionLocation--; UpdateScreen(questionScreen, "Select a game:  >" + gameName[gameOptionLocation]); }
        }
        else if(r2 < 20)
        {
            if(gameOptionLocation < 1) { gameOptionLocation++; UpdateScreen(questionScreen, "Select a game:  >" + gameName[gameOptionLocation]); }
        }
    }
    
    StartGame(gameOptionLocation);
}

void StartGame(int gameOptionLocation)
{
    switch(gameOptionLocation)
    {
        case 0:
            MultiChoice();
        case 1:
            Pong();
    }    
}

void MultiChoice()
{
    bool multiMaths = true;
    
    DisplayNewQuestion();
    while(multiMaths) {
        UpdateRange();
        
        if(CheckExit(r1, r2))
        {
            GameOption();    
        }
        
        if(r1 < 20)
        {
            if(CheckCorrect(1))
            {
                UpdateScreen(questionScreen, "Correct!");
                wait(1);
                DisplayNewQuestion();
            }
            else
            {
                UpdateScreen(questionScreen, "Try Again!");
                wait(1);
                UpdateScreen(questionScreen, questions[questionCount]);
            }
        }
        if(r2 < 20)
        {
            if(CheckCorrect(2))
            {
                UpdateScreen(questionScreen, "Correct!");
                wait(1);
                DisplayNewQuestion();
            }
            else
            {
                UpdateScreen(questionScreen, "Try Again!");
                wait(1);
                UpdateScreen(questionScreen, questions[questionCount]);
            }
        }    
        
        wait(0.5);
    }
}

void DisplayNewQuestion()
{
    if(questionCount >= 3)
    {
        questionCount = 0;    
    }
    else
    {
        questionCount++;    
    }
    
    UpdateScreen(questionScreen, questions[questionCount]);
    UpdateScreen(screen1, screen1Answers[questionCount]);
    UpdateScreen(screen2, screen2Answers[questionCount]);
}

bool CheckCorrect(int screenNumber)
{
    if(screenNumber == correctScreen[questionCount])
    {
        return true;    
    }
    else
    {
        return false;    
    }
}

void Pong()
{
        
}

string exitOption[2] = {"Yes", "No"};
bool CheckExit(float r1, float r2)
{
    if(r1 < 25 && r2 < 25)
    {
        return ExitScreen();
    }
    else
    {
        return false;
    }
}

bool ExitScreen()
{
    int exitOption_int = 0;
    UpdateScreen(questionScreen, "AreYouSureYouWantToExit? >" + exitOption[exitOption_int]);
    
    wait(1);
    
    bool choosing = true;
    while(choosing)
    {
        wait(0.5);
        UpdateRange();
        if(r1 < 25 && r2 < 25)
        {
            if(exitOption_int == 0) 
            { 
                choosing = false;
                UpdateScreen(questionScreen, "Exiting...");
                wait(1);
                return true; 
            }
            else 
            { 
                choosing = false; 
                UpdateScreen(questionScreen, "Returning to game");
                wait(1);
                return false; 
            }
        }
        else if(r1 < 20)
        { 
            if(exitOption_int > 0) { exitOption_int--; UpdateScreen(questionScreen, "AreYouSureYouWantToExit? >" + exitOption[exitOption_int]); }
        }
        else if(r2 < 20)
        {
            if(exitOption_int < 1) { exitOption_int++; UpdateScreen(questionScreen, "AreYouSureYouWantToExit? >" + exitOption[exitOption_int]); }
        }
    }
}

void UpdateScreen(DigitalOut screen, string text)
{
    //disable all E pin for all screens
    questionScreen = 0;
    screen1 = 0;
    screen2 = 0;
        
    //enable E pin for the scrren that we want to update
    screen = 1;
    
    //convert text to char array
    char text_char_array[1024];
    strcpy(text_char_array, text.c_str());
    //some weird behaviour after disabling the E pin once means that we need to update the screen several times for it to display properly
    for(int i = 0; i < 10; i++)
    {
        lcd.cls();
        lcd.printf(text_char_array);
    }
}

void UpdateScreen(DigitalOut screen, char text[1024])
{
    //disable all E pin for all screens
    questionScreen = 0;
    screen1 = 0;
    screen2 = 0;
        
    //enable E pin for the scrren that we want to update
    screen = 1;
    
    //some weird behaviour after disabling the E pin once means that we need to update the screen several times for it to display properly
    for(int i = 0; i < 10; i++)
    {
        lcd.cls();
        lcd.printf(text);
    }
}

void UpdateScreen(DigitalOut screen, int firstLineLocation, string firstLineText, int secondLineLocation, string secondLineText)
{
    //disable all E pin for all screens
    questionScreen = 0;
    screen1 = 0;
    screen2 = 0;
        
    //enable E pin for the scrren that we want to update
    screen = 1;
    
    string line1text = GetLocationSpaces(firstLineLocation) + firstLineText;
    string line2text = GetLocationSpaces(secondLineLocation) + secondLineText;
    
    //convert text to char array
    char firstLine_char_array[1024];
    char secondLine_char_array[1024];
    strcpy(firstLine_char_array, line1text.c_str());
    strcpy(secondLine_char_array, line2text.c_str());
    
    //some weird behaviour after disabling the E pin once means that we need to update the screen several times for it to display properly
    for(int i = 0; i < 10; i++)
    {
        lcd.cls();
        lcd.locate(0, 0);
        lcd.printf(firstLine_char_array);
        lcd.locate(0, 1);
        lcd.printf(secondLine_char_array);
    }
}

string GetLocationSpaces(int location)
{
    string space = "";
    for(int i = 0; i < location; i++)
    {
        space += " ";
    }    
    return space;
}

void ClearAllScreen()
{
    questionScreen = 1;
    screen1 = 1;
    screen2 = 1;
    
    lcd.cls();
}

void UpdateRange()
{
    // Trigger read, wait 49ms until ranger finder has
    // finished, then read. 
    range1->triggerRead();
    wait_ms(49);
    r1 = range1->read();
        
    range2->triggerRead();
    wait_ms(49);
    r2 = range2->read();
}