Ben Evans University Second Year Project. Game Called Defender.
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Gamepad.h
00001 #ifndef GAMEPAD_H 00002 #define GAMEPAD_H 00003 00004 #include <bitset> 00005 00006 // Forward declaration of the classes that we use from the mbed library 00007 // This avoids the need for us to include the huge mbed.h header inside our 00008 // own library API 00009 namespace mbed 00010 { 00011 class AnalogIn; 00012 class InterruptIn; 00013 class PwmOut; 00014 class AnalogOut; 00015 class Ticker; 00016 class Timeout; 00017 } 00018 00019 #define TOL 0.1f 00020 #define RAD2DEG 57.2957795131f 00021 #define PI 3.14159265359 00022 00023 00024 /** Enum for direction */ 00025 enum Direction { 00026 CENTRE, /**< joystick centred */ 00027 N, /**< pushed North (0)*/ 00028 NE, /**< pushed North-East (45) */ 00029 E, /**< pushed East (90) */ 00030 SE, /**< pushed South-East (135) */ 00031 S, /**< pushed South (180) */ 00032 SW, /**< pushed South-West (225) */ 00033 W, /**< pushed West (270) */ 00034 NW /**< pushed North-West (315) */ 00035 }; 00036 00037 /** Vector 2D struct */ 00038 struct Vector2D { 00039 float x; /**< float for x value */ 00040 float y; /**< float for y value */ 00041 }; 00042 00043 /** Polar coordinate struct */ 00044 struct Polar { 00045 float mag; /**< float for magnitude */ 00046 float angle; /**< float for angle (in degrees) */ 00047 }; 00048 00049 /** Gamepad Class 00050 * @brief Library for interfacing with ELEC2645 Gamepad PCB, University of Leeds 00051 * @author Dr Craig A. Evans 00052 * @author Dr Alex Valavanis 00053 * @author Joshua Davy 00054 */ 00055 class Gamepad 00056 { 00057 00058 private: 00059 mbed::PwmOut *_led1; 00060 mbed::PwmOut *_led2; 00061 mbed::PwmOut *_led3; 00062 mbed::PwmOut *_led4; 00063 mbed::PwmOut *_led5; 00064 mbed::PwmOut *_led6; 00065 00066 mbed::InterruptIn *_button_A; 00067 mbed::InterruptIn *_button_B; 00068 mbed::InterruptIn *_button_X; 00069 mbed::InterruptIn *_button_Y; 00070 mbed::InterruptIn *_button_start; 00071 00072 mbed::AnalogIn *_vert; 00073 mbed::AnalogIn *_horiz; 00074 00075 mbed::AnalogIn *_pot1; 00076 mbed::AnalogIn *_pot2; 00077 mbed::AnalogIn *_adc; 00078 00079 mbed::AnalogOut *dac; 00080 mbed::Ticker *ticker; 00081 mbed::Timeout *timeout; 00082 mbed::Timeout *note_timeout; 00083 00084 // centred x,y values 00085 float _x0; 00086 float _y0; 00087 00088 float *_sample_array; 00089 const int *_notes; 00090 const int *_durations; 00091 00092 int _n; 00093 int _melody_length; 00094 volatile unsigned int _sample; 00095 volatile unsigned int _note; 00096 float _bpm; 00097 bool _repeat; 00098 00099 00100 public: 00101 /** Constructor */ 00102 Gamepad(); 00103 00104 /** Initialise all peripherals and configure interrupts */ 00105 void init(); 00106 00107 /** Turn all LEDs on */ 00108 void leds_on(); 00109 00110 /** Turn all LEDs off */ 00111 void leds_off(); 00112 00113 /** Set all LEDs to duty-cycle 00114 *@param value in range 0.0 to 1.0 00115 */ 00116 void leds(float val) const; 00117 00118 /** Set LED to duty-cycle 00119 *@param led number (0 to 5) 00120 *@param value in range 0.0 to 1.0 00121 */ 00122 void led(int n,float val) const; 00123 00124 /** Read potentiometer 1 value 00125 *@returns potentiometer value in range 0.0 to 1.0 00126 */ 00127 float read_pot1() const; 00128 00129 /** Read potentiometer 2 value 00130 *@returns potentiometer value in range 0.0 to 1.0 00131 */ 00132 float read_pot2() const; 00133 00134 /** Read padc value 00135 *@returns random adc value 00136 */ 00137 float read_adc() const; 00138 00139 /** Get magnitude of joystick movement 00140 * @returns value in range 0.0 to 1.0 00141 */ 00142 float get_mag(); 00143 00144 /** Get angle of joystick movement 00145 * @returns value in range 0.0 to 359.9. 0.0 corresponds to N, 180.0 to S. -1.0 is central 00146 */ 00147 float get_angle(); 00148 00149 /** Gets joystick direction 00150 * @returns an enum: CENTRE, N, NE, E, SE, S, SW, W, NW, 00151 */ 00152 Direction get_direction(); // N,NE,E,SE etc. 00153 00154 /** Gets raw cartesian co-ordinates of joystick 00155 * @returns a struct with x,y members, each in the range 0.0 to 1.0 00156 */ 00157 Vector2D get_coord(); // cartesian co-ordinates x,y 00158 00159 /** Gets cartesian coordinates mapped to circular grid 00160 * @returns a struct with x,y members, each in the range 0.0 to 1.0 00161 */ 00162 Vector2D get_mapped_coord(); // x,y mapped to circle 00163 00164 /** Gets polar coordinates of the joystick 00165 * @returns a struct contains mag and angle 00166 */ 00167 Polar get_polar(); // mag and angle in struct form 00168 00169 00170 /** Resets all button states. Useful for calling inbetween scenes 00171 * where you do not want button presses from the previous scene effecting 00172 * the current scene 00173 */ 00174 void reset_buttons(); 00175 00176 /** Returns true if A has been pressed 00177 * @returns a bool corresponding to A being pressed 00178 */ 00179 00180 bool A_pressed(); 00181 00182 /** Returns true if A is held 00183 * @returns a bool corresponding to A being held 00184 * 00185 */ 00186 bool A_held(); 00187 00188 00189 /** Returns true if B has been pressed 00190 * @returns a bool corresponding to B being pressed 00191 */ 00192 bool B_pressed(); 00193 00194 /** Returns true if B is held 00195 * @returns a bool corresponding to B being held 00196 * 00197 */ 00198 bool B_held(); 00199 00200 /** Returns true if B has been pressed 00201 * @returns a bool corresponding to B being pressed 00202 */ 00203 bool X_pressed(); 00204 00205 /** Returns true if X is held 00206 * @returns a bool corresponding to X being held 00207 * 00208 */ 00209 bool X_held(); 00210 00211 /** Returns true if Y has been pressed 00212 * @returns a bool corresponding to Y being pressed 00213 */ 00214 bool Y_pressed(); 00215 00216 /** Returns true if Y is held 00217 * @returns a bool corresponding to Y being held 00218 * 00219 */ 00220 bool Y_held(); 00221 00222 00223 /** Returns true if start has been pressed 00224 * @returns a bool corresponding to start being pressed 00225 */ 00226 bool start_pressed(); 00227 00228 /** Returns true if start is held 00229 * @returns a bool corresponding to start being held 00230 * 00231 */ 00232 bool start_held(); 00233 00234 /** Play a single tone for the specifed duration 00235 *@param note frequency (in Hz) 00236 *@param duration (in s) 00237 */ 00238 void tone(const float frequency,const float duration); 00239 00240 /** Play a melody 00241 *@param length of note array 00242 *@param array of note frequencies (in Hz) - 0 treated as a rest 00243 *@param array of note durations (4 corresponds to 1/4, 8 is 1/8 etc.) 00244 *@param beats per minute 00245 *@param whether to repeat or play just once 00246 */ 00247 void play_melody(int length,const int *notes,const int *durations,float bpm,bool repeat); 00248 00249 /** Set the BPM of the melody 00250 *@param beats per minute 00251 */ 00252 void set_bpm(float bpm); 00253 00254 /** Write an analog voltage to the speaker 00255 *@param voltage in range 0.0 to 1.0 (corresponds 0.0 to 3.3 V) 00256 */ 00257 void write_dac(float val); 00258 00259 00260 00261 00262 private: 00263 00264 volatile bool A_fall; 00265 void A_fall_interrupt(); 00266 00267 volatile bool B_fall; 00268 void B_fall_interrupt(); 00269 00270 volatile bool X_fall; 00271 void X_fall_interrupt(); 00272 00273 volatile bool Y_fall; 00274 void Y_fall_interrupt(); 00275 00276 volatile bool start_fall; 00277 void start_fall_interrupt(); 00278 00279 // Tone functions 00280 void ticker_isr(); 00281 void timeout_isr(); 00282 void note_timeout_isr(); 00283 void play_next_note(); 00284 00285 00286 00287 }; 00288 00289 // Note definitions from Arduino.cc 00290 #define NOTE_B0 31 00291 #define NOTE_C1 33 00292 #define NOTE_CS1 35 00293 #define NOTE_D1 37 00294 #define NOTE_DS1 39 00295 #define NOTE_E1 41 00296 #define NOTE_F1 44 00297 #define NOTE_FS1 46 00298 #define NOTE_G1 49 00299 #define NOTE_GS1 52 00300 #define NOTE_A1 55 00301 #define NOTE_AS1 58 00302 #define NOTE_B1 62 00303 #define NOTE_C2 65 00304 #define NOTE_CS2 69 00305 #define NOTE_D2 73 00306 #define NOTE_DS2 78 00307 #define NOTE_E2 82 00308 #define NOTE_F2 87 00309 #define NOTE_FS2 93 00310 #define NOTE_G2 98 00311 #define NOTE_GS2 104 00312 #define NOTE_A2 110 00313 #define NOTE_AS2 117 00314 #define NOTE_B2 123 00315 #define NOTE_C3 131 00316 #define NOTE_CS3 139 00317 #define NOTE_D3 147 00318 #define NOTE_DS3 156 00319 #define NOTE_E3 165 00320 #define NOTE_F3 175 00321 #define NOTE_FS3 185 00322 #define NOTE_G3 196 00323 #define NOTE_GS3 208 00324 #define NOTE_A3 220 00325 #define NOTE_AS3 233 00326 #define NOTE_B3 247 00327 #define NOTE_C4 262 00328 #define NOTE_CS4 277 00329 #define NOTE_D4 294 00330 #define NOTE_DS4 311 00331 #define NOTE_E4 330 00332 #define NOTE_F4 349 00333 #define NOTE_FS4 370 00334 #define NOTE_G4 392 00335 #define NOTE_GS4 415 00336 #define NOTE_A4 440 00337 #define NOTE_AS4 466 00338 #define NOTE_B4 494 00339 #define NOTE_C5 523 00340 #define NOTE_CS5 554 00341 #define NOTE_D5 587 00342 #define NOTE_DS5 622 00343 #define NOTE_E5 659 00344 #define NOTE_F5 698 00345 #define NOTE_FS5 740 00346 #define NOTE_G5 784 00347 #define NOTE_GS5 831 00348 #define NOTE_A5 880 00349 #define NOTE_AS5 932 00350 #define NOTE_B5 988 00351 #define NOTE_C6 1047 00352 #define NOTE_CS6 1109 00353 #define NOTE_D6 1175 00354 #define NOTE_DS6 1245 00355 #define NOTE_E6 1319 00356 #define NOTE_F6 1397 00357 #define NOTE_FS6 1480 00358 #define NOTE_G6 1568 00359 #define NOTE_GS6 1661 00360 #define NOTE_A6 1760 00361 #define NOTE_AS6 1865 00362 #define NOTE_B6 1976 00363 #define NOTE_C7 2093 00364 #define NOTE_CS7 2217 00365 #define NOTE_D7 2349 00366 #define NOTE_DS7 2489 00367 #define NOTE_E7 2637 00368 #define NOTE_F7 2794 00369 #define NOTE_FS7 2960 00370 #define NOTE_G7 3136 00371 #define NOTE_GS7 3322 00372 #define NOTE_A7 3520 00373 #define NOTE_AS7 3729 00374 #define NOTE_B7 3951 00375 #define NOTE_C8 4186 00376 #define NOTE_CS8 4435 00377 #define NOTE_D8 4699 00378 #define NOTE_DS8 4978 00379 #define REST 0 00380 00381 #endif
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