Bonny Ngangu / Mbed 2 deprecated Squash_Project

The present code implements a single player squash game, using joystick to move paddle right or left. And checks the current temperature inside the device.

Dependencies:   2645_I2C_TMP102 2645_Physics_Engine_Example Paddle mbed

main.cpp@4:1d38d6b09e84, 2016-05-11 (annotated)

Committer:
bonnyngangu
Date:
Wed May 11 14:45:00 2016 +0000
Revision:
4:1d38d6b09e84
Parent:
2:c1b442f26087 
Latest version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bonnyngangu 0:61128d697217 1 #include "mbed.h"
bonnyngangu 0:61128d697217 2 #include "N5110.h"
bonnyngangu 4:1d38d6b09e84 3 #include "temp.h"
bonnyngangu 2:c1b442f26087 4 #include "main.h"
bonnyngangu 2:c1b442f26087 5
bonnyngangu 0:61128d697217 6
bonnyngangu 0:61128d697217 7 #define BALLRADIUS 2
bonnyngangu 0:61128d697217 8
bonnyngangu 0:61128d697217 9
bonnyngangu 0:61128d697217 10
bonnyngangu 0:61128d697217 11
bonnyngangu 1:fe4ac8f10309 12
bonnyngangu 0:61128d697217 13 void delete_file(char filename[]);
bonnyngangu 0:61128d697217 14
bonnyngangu 0:61128d697217 15 // function prototypes
bonnyngangu 0:61128d697217 16 void init_ball();
bonnyngangu 0:61128d697217 17 void game_timer_isr();
bonnyngangu 0:61128d697217 18 void BallMove();
bonnyngangu 0:61128d697217 19 void redraw_screen();
bonnyngangu 0:61128d697217 20 void update_physics_engine();
bonnyngangu 0:61128d697217 21 void check_collisions();
bonnyngangu 0:61128d697217 22 void Squash_Court();
bonnyngangu 0:61128d697217 23 void getPaddle();
bonnyngangu 0:61128d697217 24 void PaddleMove();
bonnyngangu 0:61128d697217 25 void updateJoystick();
bonnyngangu 1:fe4ac8f10309 26 void drawCircle(int x0,int y0,int radius,int fill);
bonnyngangu 2:c1b442f26087 27 void Temp_reading();
bonnyngangu 0:61128d697217 28
bonnyngangu 0:61128d697217 29 // Can give better performance due to current limitation from GPIO pin
bonnyngangu 0:61128d697217 30 Ticker game_timer;
bonnyngangu 0:61128d697217 31
bonnyngangu 0:61128d697217 32 // struct used to store 2D vectors
bonnyngangu 0:61128d697217 33 typedef struct vector_t vector_t;
bonnyngangu 0:61128d697217 34 struct vector_t {
bonnyngangu 0:61128d697217 35 float x;
bonnyngangu 0:61128d697217 36 float y;
bonnyngangu 0:61128d697217 37 };
bonnyngangu 0:61128d697217 38
bonnyngangu 0:61128d697217 39 vector_t pos; // ball position
bonnyngangu 0:61128d697217 40 vector_t vel; // ball velocity
bonnyngangu 0:61128d697217 41 vector_t acc; // ball acceleration
bonnyngangu 0:61128d697217 42
bonnyngangu 0:61128d697217 43 float refresh_rate = 25.0; // how often to update display (Hz)
bonnyngangu 0:61128d697217 44 float g_dt = 2.0F/refresh_rate; // global to store time step (F makes it a float, gets rid of compiler warning)
bonnyngangu 0:61128d697217 45 volatile int g_timer_flag = 0;
bonnyngangu 0:61128d697217 46
bonnyngangu 0:61128d697217 47 int scoring = 0;// setting the value of starting score.
bonnyngangu 1:fe4ac8f10309 48 int m = 42;
bonnyngangu 0:61128d697217 49
bonnyngangu 0:61128d697217 50 int main()
bonnyngangu 0:61128d697217 51 {
bonnyngangu 0:61128d697217 52
bonnyngangu 0:61128d697217 53 wait(1.0); // short delay for power settling
bonnyngangu 0:61128d697217 54 lcd.init(); // initialising the display
bonnyngangu 1:fe4ac8f10309 55
bonnyngangu 1:fe4ac8f10309 56 // creating introduction screen
bonnyngangu 0:61128d697217 57 lcd.printString(" SQUASH!",15,2);
bonnyngangu 0:61128d697217 58 lcd.inverseMode(); // invert colours
bonnyngangu 0:61128d697217 59 lcd.drawLine(41,0,0,23,1);
bonnyngangu 0:61128d697217 60 lcd.drawLine(41,0,83,23,1);
bonnyngangu 0:61128d697217 61 lcd.drawLine(0,23,41,47,1);
bonnyngangu 0:61128d697217 62 lcd.drawLine(83,23,41,47,1);
bonnyngangu 0:61128d697217 63 lcd.refresh();
bonnyngangu 0:61128d697217 64 wait(5.0);
bonnyngangu 0:61128d697217 65 lcd.clear();
bonnyngangu 1:fe4ac8f10309 66
bonnyngangu 0:61128d697217 67 lcd.printString("Game starting",5,2);
bonnyngangu 0:61128d697217 68 lcd.normalMode(); // normal colour mode
bonnyngangu 0:61128d697217 69 lcd.setBrightness(0.5); // put LED backlight on 50%
bonnyngangu 0:61128d697217 70
bonnyngangu 1:fe4ac8f10309 71 buzzer.period_ms(1.5);
bonnyngangu 0:61128d697217 72 buzzer.pulsewidth_ms(1.9);
bonnyngangu 0:61128d697217 73 getPaddle();
bonnyngangu 0:61128d697217 74 wait(3.0);
bonnyngangu 2:c1b442f26087 75 lcd.clear();
bonnyngangu 2:c1b442f26087 76
bonnyngangu 2:c1b442f26087 77 // checking the heat on the regulator
bonnyngangu 2:c1b442f26087 78 Temp_reading();
bonnyngangu 2:c1b442f26087 79 wait(3.0);
bonnyngangu 2:c1b442f26087 80
bonnyngangu 1:fe4ac8f10309 81 init_ball();
bonnyngangu 0:61128d697217 82
bonnyngangu 0:61128d697217 83 // setup ticker
bonnyngangu 0:61128d697217 84 game_timer.attach(&game_timer_isr,g_dt);
bonnyngangu 0:61128d697217 85
bonnyngangu 0:61128d697217 86 redraw_screen(); // draw initial screen
bonnyngangu 1:fe4ac8f10309 87
bonnyngangu 0:61128d697217 88 while (1) {
bonnyngangu 0:61128d697217 89
bonnyngangu 1:fe4ac8f10309 90 Squash_Court(); // draw squash court
bonnyngangu 1:fe4ac8f10309 91
bonnyngangu 1:fe4ac8f10309 92 // setting the joystick control.
bonnyngangu 1:fe4ac8f10309 93 if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 94 joystick.direction = CENTRE;
bonnyngangu 1:fe4ac8f10309 95 int m = 42;
bonnyngangu 1:fe4ac8f10309 96 lcd.drawLine(m-6,45,m+6,45,1);
bonnyngangu 1:fe4ac8f10309 97 lcd.refresh();
bonnyngangu 1:fe4ac8f10309 98 wait(0.05);
bonnyngangu 1:fe4ac8f10309 99 lcd.clear();
bonnyngangu 1:fe4ac8f10309 100 }
bonnyngangu 1:fe4ac8f10309 101
bonnyngangu 1:fe4ac8f10309 102 else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 103 joystick.direction = LEFT;
bonnyngangu 1:fe4ac8f10309 104 int m = 18;
bonnyngangu 1:fe4ac8f10309 105 lcd.drawLine(m-6,45,m+6,45,1);
bonnyngangu 1:fe4ac8f10309 106 lcd.refresh();
bonnyngangu 1:fe4ac8f10309 107 wait(0.05);
bonnyngangu 1:fe4ac8f10309 108 lcd.clear();
bonnyngangu 1:fe4ac8f10309 109 }
bonnyngangu 1:fe4ac8f10309 110
bonnyngangu 1:fe4ac8f10309 111 else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 112 joystick.direction = RIGHT;
bonnyngangu 1:fe4ac8f10309 113 int m = 66;
bonnyngangu 1:fe4ac8f10309 114 lcd.drawLine(m-6,45,m+6,45,1);
bonnyngangu 1:fe4ac8f10309 115 //m-=1;// moving a pixel a time.
bonnyngangu 1:fe4ac8f10309 116 lcd.refresh();
bonnyngangu 1:fe4ac8f10309 117 wait(0.05);
bonnyngangu 1:fe4ac8f10309 118 lcd.clear();
bonnyngangu 1:fe4ac8f10309 119 }
bonnyngangu 2:c1b442f26087 120
bonnyngangu 0:61128d697217 121 BallMove();
bonnyngangu 0:61128d697217 122 }
bonnyngangu 0:61128d697217 123 }
bonnyngangu 0:61128d697217 124
bonnyngangu 0:61128d697217 125 void getPaddle() // setting paddle moving
bonnyngangu 0:61128d697217 126 {
bonnyngangu 0:61128d697217 127 int m = 42 ; // set paddle into origin 42 on X axis.
bonnyngangu 0:61128d697217 128
bonnyngangu 1:fe4ac8f10309 129 // draw a circle x,y,radius,black fill
bonnyngangu 1:fe4ac8f10309 130 lcd.drawCircle(42,40,2,1);
bonnyngangu 1:fe4ac8f10309 131
bonnyngangu 0:61128d697217 132 // drawing the paddle.
bonnyngangu 0:61128d697217 133 lcd.drawLine(m-6,45,m+6,45,1);
bonnyngangu 0:61128d697217 134 lcd.refresh();
bonnyngangu 0:61128d697217 135 }
bonnyngangu 0:61128d697217 136
bonnyngangu 0:61128d697217 137 void Squash_Court()
bonnyngangu 0:61128d697217 138 {
bonnyngangu 0:61128d697217 139
bonnyngangu 0:61128d697217 140 lcd.drawRect(0,0,83,47,0); // transparent, just outline
bonnyngangu 0:61128d697217 141 lcd.refresh(); // need to refresh screen after drawing rects
bonnyngangu 0:61128d697217 142
bonnyngangu 0:61128d697217 143 for (int i = 0; i < 84; i++) {
bonnyngangu 0:61128d697217 144
bonnyngangu 0:61128d697217 145 lcd.setPixel(i,24);// at y = 24 pixels (centre)
bonnyngangu 0:61128d697217 146 }
bonnyngangu 0:61128d697217 147
bonnyngangu 0:61128d697217 148 for (int i = 0; i < 84; i++) {
bonnyngangu 0:61128d697217 149
bonnyngangu 0:61128d697217 150 lcd.setPixel(i,16);// // at y = 14 pixels
bonnyngangu 0:61128d697217 151 }
bonnyngangu 0:61128d697217 152
bonnyngangu 0:61128d697217 153 // need to refresh display after setting pixels
bonnyngangu 0:61128d697217 154 lcd.refresh();
bonnyngangu 0:61128d697217 155
bonnyngangu 0:61128d697217 156 }
bonnyngangu 0:61128d697217 157
bonnyngangu 0:61128d697217 158 void BallMove()
bonnyngangu 0:61128d697217 159 {
bonnyngangu 0:61128d697217 160 if ( g_timer_flag ) { // ticker interrupt
bonnyngangu 0:61128d697217 161 g_timer_flag = 0; // clear flag
bonnyngangu 0:61128d697217 162 update_physics_engine();
bonnyngangu 0:61128d697217 163 check_collisions();
bonnyngangu 0:61128d697217 164 redraw_screen();
bonnyngangu 0:61128d697217 165 }
bonnyngangu 0:61128d697217 166 }
bonnyngangu 0:61128d697217 167
bonnyngangu 0:61128d697217 168 void redraw_screen()
bonnyngangu 0:61128d697217 169 {
bonnyngangu 0:61128d697217 170 lcd.clear();
bonnyngangu 0:61128d697217 171 lcd.drawCircle(pos.x,pos.y,BALLRADIUS,1); // x,y,radius,black fill
bonnyngangu 0:61128d697217 172 lcd.refresh(); // update display
bonnyngangu 0:61128d697217 173 }
bonnyngangu 0:61128d697217 174
bonnyngangu 0:61128d697217 175 void check_collisions()
bonnyngangu 0:61128d697217 176 {
bonnyngangu 0:61128d697217 177 // see if ball has hit the floor (subtract the radius since the position is the centre of the ball)
bonnyngangu 0:61128d697217 178 if ( pos.y >= 47 - BALLRADIUS ) {
bonnyngangu 0:61128d697217 179 pos.y = 47 - BALLRADIUS; // need to force this or else ball can end up going 'underground'
bonnyngangu 0:61128d697217 180 vel.y = -1.0 * vel.y; // y velocity is reflected and dampened
bonnyngangu 0:61128d697217 181 // y accleration is still gravity
bonnyngangu 0:61128d697217 182 }
bonnyngangu 0:61128d697217 183
bonnyngangu 0:61128d697217 184 else if ( pos.y >= 45 - BALLRADIUS) {
bonnyngangu 0:61128d697217 185 pos.y = 45 - BALLRADIUS; // need to force this or else ball can end up going 'underground'
bonnyngangu 0:61128d697217 186 vel.y = -4.0 * vel.y; // y velocity is reflected and dampened
bonnyngangu 0:61128d697217 187 // y accleration is still gravity
bonnyngangu 0:61128d697217 188 }
bonnyngangu 0:61128d697217 189
bonnyngangu 0:61128d697217 190 // has ball gone off the right-hand side?
bonnyngangu 0:61128d697217 191 if ( pos.x >= 83 - BALLRADIUS ) {
bonnyngangu 0:61128d697217 192 pos.x = 83 - BALLRADIUS; // need to force this or else ball can end up going off screen
bonnyngangu 0:61128d697217 193 vel.x = -1.5 * vel.x; // reflect and damp velocity
bonnyngangu 0:61128d697217 194 acc.x = -acc.x; // reflect accleration
bonnyngangu 0:61128d697217 195 }
bonnyngangu 0:61128d697217 196
bonnyngangu 0:61128d697217 197 // what about the left?
bonnyngangu 0:61128d697217 198 if ( pos.x <= BALLRADIUS ) {
bonnyngangu 0:61128d697217 199 pos.x = BALLRADIUS; // need to force this or else ball can end up going off screen
bonnyngangu 0:61128d697217 200 vel.x = -0.5 * vel.x; // reflect and damp velocity
bonnyngangu 0:61128d697217 201 acc.x = -acc.x; // reflect accleration
bonnyngangu 0:61128d697217 202 }
bonnyngangu 0:61128d697217 203 }
bonnyngangu 0:61128d697217 204
bonnyngangu 0:61128d697217 205 void update_physics_engine()
bonnyngangu 0:61128d697217 206 {
bonnyngangu 0:61128d697217 207 // from Newton's Laws
bonnyngangu 0:61128d697217 208
bonnyngangu 0:61128d697217 209 acc.x = 0.9F*acc.x; // reduce a little due to air friction
bonnyngangu 0:61128d697217 210
bonnyngangu 0:61128d697217 211 // calc new velocity (assume 'unit' time)
bonnyngangu 0:61128d697217 212 vel.x = vel.x + acc.x; // * g_gt;
bonnyngangu 0:61128d697217 213 vel.y = vel.y + acc.y; // * g_gt;
bonnyngangu 0:61128d697217 214
bonnyngangu 0:61128d697217 215 // calc new position (assume 'unit' time)
bonnyngangu 0:61128d697217 216 pos.x = pos.x + vel.x;// * g_gt;
bonnyngangu 0:61128d697217 217 pos.y = pos.y + vel.y;// * g_dt;
bonnyngangu 0:61128d697217 218
bonnyngangu 0:61128d697217 219 // should really multiply the above by the time-step,
bonnyngangu 0:61128d697217 220 // but since the pixel can only be a integer value,
bonnyngangu 0:61128d697217 221 // it makes the motion a little 'jumpy'.
bonnyngangu 0:61128d697217 222 }
bonnyngangu 0:61128d697217 223
bonnyngangu 0:61128d697217 224 void init_ball()
bonnyngangu 0:61128d697217 225 {
bonnyngangu 0:61128d697217 226 // initial position (top-left)
bonnyngangu 0:61128d697217 227 pos.x = BALLRADIUS;
bonnyngangu 0:61128d697217 228 pos.y = BALLRADIUS;
bonnyngangu 0:61128d697217 229 // initial velocity - still
bonnyngangu 0:61128d697217 230 vel.x = 0.0;
bonnyngangu 0:61128d697217 231 vel.y = 0.0;
bonnyngangu 0:61128d697217 232 // initial acceleration - gravity and a bit of push to right
bonnyngangu 0:61128d697217 233 acc.x = 0.5;
bonnyngangu 0:61128d697217 234 acc.y = 1.0; // +ve so ball accelerates to bottom of display (top of screen is y=0, bottom is y=47)
bonnyngangu 0:61128d697217 235 // should be 9.8, but can play with value to get a 'nice' ball movement
bonnyngangu 0:61128d697217 236 }
bonnyngangu 0:61128d697217 237
bonnyngangu 1:fe4ac8f10309 238 void calibrateJoystick()
bonnyngangu 1:fe4ac8f10309 239 {
bonnyngangu 1:fe4ac8f10309 240 button.mode(PullDown);
bonnyngangu 1:fe4ac8f10309 241 // must not move during calibration
bonnyngangu 1:fe4ac8f10309 242 joystick.x0 = xPot; // initial positions in the range 0.0 to 1.0 (0.5 if centred exactly)
bonnyngangu 1:fe4ac8f10309 243 joystick.y0 = yPot;
bonnyngangu 1:fe4ac8f10309 244 }
bonnyngangu 1:fe4ac8f10309 245 void updateJoystick()
bonnyngangu 1:fe4ac8f10309 246 {
bonnyngangu 1:fe4ac8f10309 247 // read current joystick values relative to calibrated values (in range -0.5 to 0.5, 0.0 is centred)
bonnyngangu 1:fe4ac8f10309 248 joystick.x = xPot - joystick.x0;
bonnyngangu 1:fe4ac8f10309 249 joystick.y = yPot - joystick.y0;
bonnyngangu 1:fe4ac8f10309 250 // read button state
bonnyngangu 1:fe4ac8f10309 251 joystick.buttonjoystick = button;
bonnyngangu 1:fe4ac8f10309 252
bonnyngangu 1:fe4ac8f10309 253 // calculate direction depending on x,y values
bonnyngangu 1:fe4ac8f10309 254 // tolerance allows a little lee-way in case joystick not exactly in the stated direction
bonnyngangu 1:fe4ac8f10309 255 if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 256 joystick.direction = CENTRE;
bonnyngangu 1:fe4ac8f10309 257 } else if ( joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 258 joystick.direction = UP;
bonnyngangu 1:fe4ac8f10309 259 } else if ( joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 260 joystick.direction = DOWN;
bonnyngangu 1:fe4ac8f10309 261 } else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 262 joystick.direction = RIGHT;
bonnyngangu 1:fe4ac8f10309 263 } else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
bonnyngangu 1:fe4ac8f10309 264 joystick.direction = LEFT;
bonnyngangu 1:fe4ac8f10309 265 } else {
bonnyngangu 1:fe4ac8f10309 266 joystick.direction = UNKNOWN;
bonnyngangu 1:fe4ac8f10309 267 }
bonnyngangu 1:fe4ac8f10309 268
bonnyngangu 1:fe4ac8f10309 269 // set flag for printing
bonnyngangu 1:fe4ac8f10309 270 printFlag = 1;
bonnyngangu 1:fe4ac8f10309 271 }
bonnyngangu 1:fe4ac8f10309 272
bonnyngangu 2:c1b442f26087 273 void Temp_reading()
bonnyngangu 2:c1b442f26087 274 {
bonnyngangu 2:c1b442f26087 275 //lcd.init(); // initialising the display
bonnyngangu 2:c1b442f26087 276 // initialise the board and serial port
bonnyngangu 2:c1b442f26087 277 init_K64F();
bonnyngangu 2:c1b442f26087 278 init_serial();
bonnyngangu 2:c1b442f26087 279 // call the sensor init method using dot syntax
bonnyngangu 2:c1b442f26087 280 tmp102.init();
bonnyngangu 2:c1b442f26087 281
bonnyngangu 2:c1b442f26087 282
bonnyngangu 2:c1b442f26087 283 // can directly print strings at specified co-ordinates
bonnyngangu 2:c1b442f26087 284 lcd.printString("Current Temp",0,0);
bonnyngangu 2:c1b442f26087 285
bonnyngangu 2:c1b442f26087 286 // read temperature and print over serial port
bonnyngangu 2:c1b442f26087 287 float T = tmp102.get_temperature();
bonnyngangu 2:c1b442f26087 288 pc.printf("T = %f K\n",T);
bonnyngangu 2:c1b442f26087 289
bonnyngangu 2:c1b442f26087 290 char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
bonnyngangu 2:c1b442f26087 291 // so can display a string of a maximum 14 characters in length
bonnyngangu 2:c1b442f26087 292 // or create formatted strings - ensure they aren't more than 14 characters long
bonnyngangu 2:c1b442f26087 293 int length = sprintf(buffer,"T = %.2f C",T); // print formatted data to buffer
bonnyngangu 2:c1b442f26087 294 // it is important the format specifier ensures the length will fit in the buffer
bonnyngangu 2:c1b442f26087 295 if (length <= 14) // if string will fit on display
bonnyngangu 2:c1b442f26087 296 lcd.printString(buffer,0,2);
bonnyngangu 2:c1b442f26087 297
bonnyngangu 2:c1b442f26087 298 // small delay - 1s to match the update rate of the sensor (1 Hz)
bonnyngangu 2:c1b442f26087 299 wait(1.0);
bonnyngangu 2:c1b442f26087 300
bonnyngangu 2:c1b442f26087 301 if(T<27){
bonnyngangu 2:c1b442f26087 302
bonnyngangu 2:c1b442f26087 303 g_led = 0;
bonnyngangu 2:c1b442f26087 304 lcd.printString("Fan OFF",0,4);
bonnyngangu 2:c1b442f26087 305 }
bonnyngangu 2:c1b442f26087 306
bonnyngangu 2:c1b442f26087 307 if (T>=30){
bonnyngangu 2:c1b442f26087 308
bonnyngangu 2:c1b442f26087 309 r_led = 0;
bonnyngangu 2:c1b442f26087 310 lcd.printString("Fan ON ",0,4);
bonnyngangu 2:c1b442f26087 311 }
bonnyngangu 2:c1b442f26087 312 }
bonnyngangu 2:c1b442f26087 313
bonnyngangu 2:c1b442f26087 314
bonnyngangu 0:61128d697217 315 void game_timer_isr()
bonnyngangu 0:61128d697217 316 {
bonnyngangu 0:61128d697217 317 g_timer_flag = 1;
bonnyngangu 1:fe4ac8f10309 318 }