File content as of revision 18:789e9fafa5f6:

#include "mbed.h"
#include "MODSERIAL.h"
#define NUMBER_OF_PIXELS 50
#define PADDLE_LENGTH    5
#define STARTING_SPEED   20
#define LEFT false
#define RIGHT true

#define MAX_PADDLE_SIZE 10
void Randomblinks(float seconds, bool colored = false);
void PaddleDemo(float seconds, uint8_t red, uint8_t green, uint8_t blue);
void WinLoose(float seconds, bool side);
void UpdateDemoPaddle(void);
void Score(uint8_t left, uint8_t right);
void DrawGamePaddle(void);
void HandleScore(uint8_t *, uint8_t *, bool, Timer *);
void DrawLine(uint8_t start, uint8_t end, uint8_t red, uint8_t green, uint8_t blue);
uint16_t totalstrip[NUMBER_OF_PIXELS];
volatile int8_t paddlestart= 0;
bool strip_drawable = true;
SPI ledstrip(PTD2,NC,PTD1);
MODSERIAL pc(USBTX,USBRX);

class Paddle
{
    public:
    Paddle();//constructor
//    ~Paddle();//deconstructor
    int16_t position;
    uint8_t direction;
    void setSpeed(float speed); //pixels per second
    void setColor(uint8_t red, uint8_t green, uint8_t blue);
    uint8_t getSize(void);
    uint8_t getSpeed(void){return m_speed;};
    void setSize(uint8_t size);
    uint8_t getColor(uint8_t pixel, uint8_t color);
    private:
    uint8_t m_red ,m_green ,m_blue;
    uint8_t m_size;
    uint8_t m_paddle[MAX_PADDLE_SIZE][3];
    float   m_speed;
    Ticker UpdatePosition;
    void PositionUpdater(void);
};

Paddle::Paddle()
{
    setColor(255,255,255);
    setSize(4);
    position = -getSize();
    direction = 1;
    setSpeed(50);
}

void Paddle::setSpeed(float speed)
{
//truncate
    float time;
    if(speed > 100000)
        speed = 100000;
    if(speed <= 0)
        speed = 0.001;
    m_speed = speed;
    time = 1/m_speed;
    UpdatePosition.detach();
    UpdatePosition.attach(this,&Paddle::PositionUpdater, time);
}

void Paddle::PositionUpdater(void)
{
    if(direction == 1)
        position++;
    else
        position--;
}

uint8_t Paddle::getColor(uint8_t pixel, uint8_t color)
{
    if(pixel<MAX_PADDLE_SIZE && color < 3)
        return m_paddle[pixel][color];
    else
        return 0;
}

uint8_t Paddle::getSize(void)
{
    return m_size;
}

void Paddle::setSize(uint8_t size)
{
    if(size > MAX_PADDLE_SIZE)
        size = MAX_PADDLE_SIZE;
    m_size = size;
    setColor(m_red, m_green, m_blue);
}

void Paddle::setColor(uint8_t red, uint8_t green, uint8_t blue)
{
    uint8_t paddlepixel;
    m_red = red;
    m_green = green;
    m_blue = blue;
    for(paddlepixel = 0 ; paddlepixel < MAX_PADDLE_SIZE ; paddlepixel++)
    {
        float factor;
        factor = 1.0*paddlepixel/(m_size*1.0);
        if (factor > 1)
            factor = 1;
        factor = factor*factor*factor;// make the effect more dramatic
        m_paddle[paddlepixel][0] = (float)m_red * factor; 
        m_paddle[paddlepixel][1] = (float)m_green * factor;
        m_paddle[paddlepixel][2] = (float)m_blue * factor;
    }
}

class GameButton
{
    public:
    GameButton(){};
    GameButton(PinName pin, float time);
    bool pushflag;
    bool getTimeoutActive(void);
    protected:
    virtual void pushhandlercallback(void){};
    private:
    InterruptIn *intpin;
    Timeout     timeout;
    float m_time;
    bool    m_timeoutactive;
    void TimeOutHandler(void);
    virtual void PushHandler(void);
};

GameButton::GameButton(PinName pin, float time=0.5)
{
    pushflag = false;
    intpin = new InterruptIn(pin);
    (*intpin).mode(PullUp);
    (*intpin).fall(this, &GameButton::PushHandler);
    m_time = time;
    m_timeoutactive = false;
    //timeout = new Timeout(m_time);
}

void GameButton::PushHandler(void)
{
    pushflag = true;
    m_timeoutactive = true;
    timeout.attach(this, &GameButton::TimeOutHandler, m_time);
    pushhandlercallback();
}

void GameButton::TimeOutHandler(void)
{
    m_timeoutactive = false;
}

bool GameButton::getTimeoutActive(void)
{
    return m_timeoutactive;
}

Paddle paddle;

class PongGameButton : public GameButton
{
    public:
    PongGameButton(PinName name, float time);
    void pushhandlercallback(void);
    int16_t paddlepos;
};

PongGameButton::PongGameButton(PinName name, float time) : GameButton(name)
{
    paddlepos = 0;
}

void PongGameButton::pushhandlercallback(void)
{
    paddlepos = paddle.position;
}

void UpdateLEDstrip(void)
{
    uint8_t pixelcounter;
    if(strip_drawable)
    {
        /*start by writing 32 zeroes */
        ledstrip.write(0);
        ledstrip.write(0);
        ledstrip.write(0);
        ledstrip.write(0);
        for(pixelcounter = 0 ; pixelcounter < NUMBER_OF_PIXELS; pixelcounter++) {
            ledstrip.write( uint8_t(totalstrip[pixelcounter]>>8));//uint8_t(temp16));//(totalstrip.ledcounter[pixelcounter].red << 2) | (totalstrip.ledcounter[pixelcounter].high << 7)  |(totalstrip.ledcounter[pixelcounter].green & 0x << 2)  );
            ledstrip.write( uint8_t(totalstrip[pixelcounter]));//(*(uint16_t *)(&totalstrip[pixelcounter]))>>8);
        }
   }
}

void write_led(uint16_t * led, uint8_t red, uint8_t green, uint8_t blue)
{
    *led = (1<<15) | ((green >> 3)<<10) | ((red >>3)<< 5) | (blue >>3);
}


bool  rightpushed = false;
int16_t  rightpushpos = 0;

void right_pushed(void)
{
    rightpushpos = paddle.position;
    if(paddle.direction == 1)
        rightpushed = true;
}

int main()
{
    Ticker updater;
    //Ticker demopaddlepos;
    Timer  gametimer;
    PongGameButton buttonleft(PTD5,0.5);
    PongGameButton buttonright(PTD0, 0.5);
    uint8_t ledcounter;
    uint8_t left_score = 0, right_score = 0;
    pc.baud(115200);
 //   buttonleft.mode(PullUp);
 //   buttonright.mode(PullUp);
 //   buttonright.fall(right_pushed);
 //   buttonleft.fall(left_pushed);
    updater.attach(UpdateLEDstrip, .03);
    //demopaddlepos.attach(UpdateDemoPaddle, .03);
    ledstrip.format(8,0);        //15 bits, mode '0'
    ledstrip.frequency(1000000); //1MHz clock
    for(ledcounter = 0; ledcounter < NUMBER_OF_PIXELS; ledcounter++) {//turn off leds
        write_led(&totalstrip[ledcounter], 0,0,0);
    }
    paddle.setSize(6);
    paddle.setSpeed(STARTING_SPEED);
    paddle.setColor(255,0,255);
    gametimer.start();
    while(1) {
        static uint8_t naglevel1 = 0, naglevel2 = 0;
        //paddle.position = 48;
        //while(1);
        strip_drawable = false;
        DrawGamePaddle();
        if(buttonleft.getTimeoutActive())
            DrawLine(5,10,255,0,0);
        if(buttonright.getTimeoutActive())
            DrawLine(NUMBER_OF_PIXELS-5, NUMBER_OF_PIXELS-1,255,0,0);
        strip_drawable = true;
        if(buttonleft.pushflag || buttonright.pushflag)
        {
            if(paddle.direction == 1)
            {
                if(buttonright.pushflag)
                {
                    //printf("\n\rright pushed"); 
                    buttonright.pushflag = false;
                    if(buttonright.paddlepos >= NUMBER_OF_PIXELS-1  ) //also count when hit at last pixel = NUMBER_OF_PIXELS-1
                    {
                        paddle.direction = 0;
                        paddle.setSpeed(25+(buttonright.paddlepos-(NUMBER_OF_PIXELS-1))*4);
                        paddle.position = NUMBER_OF_PIXELS-2;
                    }
                    pc.printf("\n\rright pushed. Paddle position: %d, registered: %d, speed: %", paddle.position, buttonright.paddlepos,paddle.getSpeed());
                }
                buttonleft.pushflag = false;
            }
            else
            {           
                if(buttonleft.pushflag)
                {
                    //printf("\n\rleft pushed");
                    buttonleft.pushflag = false;
                    if(buttonleft.paddlepos <= 0  )
                    {
                        paddle.direction = 1;
                        paddle.setSpeed(25+(-buttonleft.paddlepos)*4);
                        paddle.position  = 0;
                    }
                    pc.printf("\n\rleft pushed. Paddle position: %d, registered: %d, speed %d", paddle.position, buttonleft.paddlepos, paddle.getSpeed());
                }
                buttonright.pushflag = false;
            }
        }
        else
        {
            if(paddle.position > ( NUMBER_OF_PIXELS + paddle.getSize() ) && (paddle.direction == 1))
            {
                pc.printf("\n\rleft player score. Paddle position: %d", paddle.position);
                //left player scores!
                left_score++;
                HandleScore(&left_score,&right_score,false, &gametimer);
                paddle.position = -paddle.getSize();
                naglevel1=naglevel2 = 0;
                paddle.setSpeed(30);
            }
             if(paddle.position < -paddle.getSize() && (paddle.direction == 0))
             {
                pc.printf("\n\rlright player score. Paddle position: %d", paddle.position);
                //right player scores!
                right_score++;
                HandleScore(&left_score,&right_score,true, &gametimer);
                naglevel1=naglevel2 = 0;
                paddle.position = NUMBER_OF_PIXELS;
                paddle.setSpeed(30);
             }
         }
         if(gametimer.read()>10 && !naglevel1)
        {
            naglevel1 = 1;
            paddle.setSize(4);
            //paddle.setSpeed(40);
        }
        if(gametimer.read()>15 && !naglevel2)
        {
            naglevel2 = 1;
            paddle.setSize(2);
            //paddle.setSpeed(70);
        }   
        wait(0.05);
    }
}

void HandleScore(uint8_t *leftscore, uint8_t *rightscore, bool last_won, Timer *gametimer)
{
    WinLoose(1.5, last_won);
    Score(*leftscore, *rightscore);
    if(*leftscore + *rightscore == 11)
    {
       *leftscore = 0;
       *rightscore = 0;
       Randomblinks(2,5);
    }
    (*(mbed::Timer *)gametimer).reset();
    paddle.setSize(6);
    paddle.setSpeed(STARTING_SPEED);
}

void DrawGamePaddle(void)
{
    uint8_t ledcounter;
    uint8_t colorpos;
    for(ledcounter = 0; ledcounter< NUMBER_OF_PIXELS; ledcounter++)
    {
        if(paddle.direction == 1)
        {
           if(ledcounter > paddle.position-paddle.getSize() && ledcounter <= paddle.position)
            {
                colorpos = paddle.getSize()-(paddle.position - ledcounter);//paddle.getSize()-(ledcounter-paddle.position);
                write_led(&totalstrip[ledcounter],paddle.getColor(colorpos,0),paddle.getColor(colorpos,1),paddle.getColor(colorpos,2));
            }
            else
                write_led(&totalstrip[ledcounter], 0,0,0);        
        }
        else
        {
            if(ledcounter >= paddle.position && ledcounter <= paddle.position+paddle.getSize())
            {
                colorpos = paddle.getSize()-(ledcounter-paddle.position);
                write_led(&totalstrip[ledcounter],paddle.getColor(colorpos,0),paddle.getColor(colorpos,1),paddle.getColor(colorpos,2));
            }
            else
                write_led(&totalstrip[ledcounter], 0,0,0);
        }
    }
}

void Score(uint8_t left, uint8_t right)
{
    uint8_t maxscore;
    int8_t ledcounter;
    uint8_t scorecounter;
    typedef struct ledcolor
    {
        uint8_t red;
        uint8_t green;
        uint8_t blue;
    }ledcolor_t;
    ledcolor_t rightled={0,0,0}, leftled={0,0,0};
    left>=right?maxscore = left: maxscore = right;
    for(scorecounter = 0 ; scorecounter <= maxscore ; scorecounter++)
    {
        uint8_t templeft,tempright;
        templeft = left>scorecounter?scorecounter:left;
        tempright = right>scorecounter?scorecounter:right;
        uint8_t sidecounter;
        if(scorecounter == maxscore)
        {
            if(left >= right)
            {
                leftled.green = 255;
                rightled.red = 255;
            }
            if(right >= left)
            {
                leftled.red = 255;
                rightled.green = 255;
            }
        }
        else
        {
            leftled.green = leftled.red = leftled.blue = rightled.green = rightled.red = rightled.blue = 255;
        }    
  
        for(ledcounter = 0; ledcounter < NUMBER_OF_PIXELS; ledcounter++)
        {
            write_led(&totalstrip[ledcounter], 0, 0 ,0);
        }
        for(sidecounter = 0 ; sidecounter < templeft; sidecounter++)
        {
            write_led(&totalstrip[sidecounter*2],leftled.red,leftled.green,leftled.blue);
        }
        for(sidecounter = 0 ; sidecounter < tempright ; sidecounter++)
        {
            write_led(&totalstrip[(NUMBER_OF_PIXELS-1)-(sidecounter*2)],rightled.red,rightled.green,rightled.blue);
        }
        wait(0.2); 
    }
    wait(0.7);
}


//Only writes pixels that are in 'line'. Does not clear, only overwrites.
void DrawLine(uint8_t start, uint8_t end, uint8_t red, uint8_t green, uint8_t blue)
{
    uint8_t ledcounter;
    if(end >= NUMBER_OF_PIXELS)
        end = NUMBER_OF_PIXELS-1;
    if(start < end)
    {
        for(ledcounter = start; ledcounter < end ; ledcounter++)
        {
            write_led(&totalstrip[ledcounter], red, green, blue);
        }
    }
}

void WinLoose(float seconds, bool side)
{
    uint8_t ledcounter;
    Timer timer;
    timer.start();
    while( timer.read() < seconds)
    {
        uint8_t redvalue = 255-(255.0*(timer.read()/(seconds/2)));
         for(ledcounter = 0; ledcounter < NUMBER_OF_PIXELS; ledcounter++) 
         {
            if(ledcounter <  NUMBER_OF_PIXELS / 2)
            {
                if(side)
                    write_led(&totalstrip[ledcounter], redvalue,0,0);
                else
                    write_led(&totalstrip[ledcounter], 0,255,0);
            }
            else
            {
                if(side)
                    write_led(&totalstrip[ledcounter], 0,255,0);
                else
                    write_led(&totalstrip[ledcounter], redvalue ,0,0);
                    
            }
        }
    }
}

void PaddleDemo(float seconds, uint8_t red, uint8_t green, uint8_t blue)
{
    uint8_t ledcounter;
    Timer timer;
    timer.start();
    while( timer.read() < seconds)
    {
         for(ledcounter = 0; ledcounter < NUMBER_OF_PIXELS; ledcounter++) 
         {
            if((ledcounter >= paddlestart) && ( ledcounter <= paddlestart+PADDLE_LENGTH))
                write_led(&totalstrip[ledcounter], red,green,blue);
            else
                write_led(&totalstrip[ledcounter], 0,0,0);
        }
    }
}

void Randomblinks(float seconds, bool colored)
{
    uint8_t ledcounter;
    uint8_t test;
    Timer timer;
    timer.start();
    while( timer.read() < seconds ) 
    {
        test = 50.0*rand()/(RAND_MAX*1.0);
        for(ledcounter = 0; ledcounter < NUMBER_OF_PIXELS; ledcounter++) 
        {
            if(ledcounter == test) 
            {
                if(colored)
                    write_led(&totalstrip[ledcounter], test*5,(test%10)*25,(test%15)*15);
                else
                    write_led(&totalstrip[ledcounter], 255,255,255);
            }
            else
                write_led(&totalstrip[ledcounter], 0,0,0);
        }
    }
}

void UpdateDemoPaddle(void)
{
    static uint8_t direction = 1;
    if(direction) {
        paddlestart++;
    } else {
        paddlestart--;
    }

    if(paddlestart > (NUMBER_OF_PIXELS - PADDLE_LENGTH))
        direction = 0;
    if(paddlestart < 0)
        direction = 1;
}