File content as of revision 0:f76f52dc57f7:

#ifndef Joystick_h
#define Joystick_h

#include "mbed.h"

#ifndef JOYSTICK_CALIBRATION_CYCLES
#define JOYSTICK_CALIBRATION_CYCLES 25
#endif
#ifndef JOYSTICK_ADC_MAX
#define JOYSTICK_ADC_MAX 0xFFFF
#endif
#define JOYSTICK_CENTER_DEADZONE JOYSTICK_ADC_MAX / 50

struct JoystickValue
{
    JoystickValue()
    : x(0)
    , y(0)
    {};
    JoystickValue(int a)
    : x(a)
    , y(a)
    {};
    JoystickValue(int ax, int ay)
    : x(ax)
    , y(ay)
    {};
    int x;
    int y;
};

class Joystick
{
public:
    Joystick(PinName pinX, PinName pinY, void(*onChange)(JoystickValue value, JoystickValue prevValue) = NULL)
    : _xIn(pinX)
    , _yIn(pinY)
    , _center(JOYSTICK_ADC_MAX / 2)
    , _joyValue(0)
    , _calibrated(false)
    , _calibrationCounter(0)
    , _range(JOYSTICK_ADC_MAX / 2)
    , _swapXY(false)
    , _flipX(false)
    , _flipY(false)
    , _delta(0)
    , _onChange(onChange)
    {};
    void process();
    void calibrate()
    {
        _center.x = JOYSTICK_ADC_MAX / 2;
        _center.y = JOYSTICK_ADC_MAX / 2;
        _calibrationCounter = 0;
        _calibrated = false;
    };
    inline bool isCalibrated() const
    {
        return _calibrated;
    };
    inline bool isSwapXY() const
    {
        return _swapXY;
    };
    inline void setSwapXY(bool swapXY)
    {
        _swapXY = swapXY;
    };
    inline bool isFlipX() const
    {
        return _flipX;
    };
    inline void setFlipX(bool flipX)
    {
        _flipX = flipX;
    };
    inline bool isFlipY() const
    {
        return _flipY;
    };
    inline void setFlipY(bool flipY)
    {
        _flipY = flipY;
    };
    inline int getRange() const
    {
        return _range;
    };
    inline void setRange(int range)
    {
        _range = range;
    };
    inline int getDelta() const
    {
        return _delta;
    };
    inline void setDelta(int delta)
    {
        _delta = delta;
    };
    inline int getX() const
    {
        return _joyValue.x;
    };
    inline int getY() const
    {
        return _joyValue.y;
    };
    inline JoystickValue getCurrentValue() const
    {
        return _joyValue;
    };
private:
    AnalogIn _xIn;
    AnalogIn _yIn;
    JoystickValue _center;
    JoystickValue _joyValue;
    bool _calibrated;
    uint16_t _calibrationCounter;
    int _range;
    bool _swapXY;
    bool _flipX;
    bool _flipY;
    int _delta;
    void(*_onChange)(JoystickValue value, JoystickValue prevValue);
};

#endif //Joystick_h