renhao dai / Mbed 2 deprecated Joystick_snake_game

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Dependencies:   N5110 mbed

main.cpp@2:d7b17623ba26, 2015-04-30 (annotated)

Committer:
el14rd
Date:
Thu Apr 30 15:54:35 2015 +0000
Revision:
2:d7b17623ba26
Parent:
1:f682aeb462f1
Child:
3:04ff8cd27dd1
snake move version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
eencae 0:026fa541af7a 1 #include "mbed.h"
el14rd 1:f682aeb462f1 2 #include "N5110.h"
eencae 0:026fa541af7a 3 #define DIRECTION_TOLERANCE 0.05
eencae 0:026fa541af7a 4
el14rd 1:f682aeb462f1 5
el14rd 1:f682aeb462f1 6 //pins in
el14rd 1:f682aeb462f1 7 N5110 lcd(p7,p8,p9,p10,p11,p13,p26);
el14rd 1:f682aeb462f1 8
eencae 0:026fa541af7a 9 // connections for joystick
el14rd 1:f682aeb462f1 10 DigitalIn button(p19);
el14rd 1:f682aeb462f1 11 AnalogIn xPot(p15);
el14rd 1:f682aeb462f1 12 AnalogIn yPot(p16);
el14rd 2:d7b17623ba26 13 //InterruptIn button(p19);
el14rd 1:f682aeb462f1 14 int i;
el14rd 1:f682aeb462f1 15 int j;
el14rd 2:d7b17623ba26 16 int X;
el14rd 2:d7b17623ba26 17 int Y;
el14rd 1:f682aeb462f1 18
el14rd 1:f682aeb462f1 19 int snakeX[100];
el14rd 1:f682aeb462f1 20 int snakeY[100];
eencae 0:026fa541af7a 21
eencae 0:026fa541af7a 22 // timer to regularly read the joystick
eencae 0:026fa541af7a 23 Ticker pollJoystick;
eencae 0:026fa541af7a 24 // Serial for debug
eencae 0:026fa541af7a 25 Serial serial(USBTX,USBRX);
eencae 0:026fa541af7a 26
eencae 0:026fa541af7a 27 // create enumerated type (0,1,2,3 etc. for direction)
eencae 0:026fa541af7a 28 // could be extended for diagonals etc.
eencae 0:026fa541af7a 29 enum DirectionName {
eencae 0:026fa541af7a 30 UP,
eencae 0:026fa541af7a 31 DOWN,
eencae 0:026fa541af7a 32 LEFT,
eencae 0:026fa541af7a 33 RIGHT,
eencae 0:026fa541af7a 34 CENTRE,
eencae 0:026fa541af7a 35 UNKNOWN
eencae 0:026fa541af7a 36 };
eencae 0:026fa541af7a 37
eencae 0:026fa541af7a 38 // struct for Joystick
eencae 0:026fa541af7a 39 typedef struct JoyStick Joystick;
eencae 0:026fa541af7a 40 struct JoyStick {
eencae 0:026fa541af7a 41 float x; // current x value
eencae 0:026fa541af7a 42 float x0; // 'centred' x value
eencae 0:026fa541af7a 43 float y; // current y value
eencae 0:026fa541af7a 44 float y0; // 'centred' y value
eencae 0:026fa541af7a 45 int button; // button state (assume pull-down used, so 1 = pressed, 0 = unpressed)
eencae 0:026fa541af7a 46 DirectionName direction; // current direction
eencae 0:026fa541af7a 47 };
eencae 0:026fa541af7a 48 // create struct variable
eencae 0:026fa541af7a 49 Joystick joystick;
eencae 0:026fa541af7a 50
eencae 0:026fa541af7a 51 int printFlag = 0;
el14rd 2:d7b17623ba26 52 //int buttonFlag = 0;
eencae 0:026fa541af7a 53 // function prototypes
el14rd 1:f682aeb462f1 54 //void setPixel(int x, int y);
el14rd 1:f682aeb462f1 55 //void clearPixel(int x, int y);
el14rd 1:f682aeb462f1 56
eencae 0:026fa541af7a 57
el14rd 1:f682aeb462f1 58 typedef struct Nut Nut;
el14rd 1:f682aeb462f1 59 struct Nut {
el14rd 1:f682aeb462f1 60 int X;
el14rd 1:f682aeb462f1 61 int Y;
el14rd 1:f682aeb462f1 62 int yes;
el14rd 1:f682aeb462f1 63 };
el14rd 1:f682aeb462f1 64 Nut nut;
eencae 0:026fa541af7a 65
el14rd 1:f682aeb462f1 66 typedef struct Snake Snake;
el14rd 1:f682aeb462f1 67 struct Snake {
el14rd 1:f682aeb462f1 68 int snakeX[100];
el14rd 1:f682aeb462f1 69 int snakeY[100];
el14rd 1:f682aeb462f1 70 int node;
el14rd 1:f682aeb462f1 71 int life;
el14rd 1:f682aeb462f1 72 DirectionName direction;
el14rd 1:f682aeb462f1 73 };
el14rd 1:f682aeb462f1 74 Snake snake;
eencae 0:026fa541af7a 75
el14rd 1:f682aeb462f1 76 DirectionName snakeDirection;
el14rd 1:f682aeb462f1 77
el14rd 2:d7b17623ba26 78 void initNut()
el14rd 2:d7b17623ba26 79 {
el14rd 2:d7b17623ba26 80 nut.X=40;
el14rd 2:d7b17623ba26 81 nut.Y=20;
el14rd 2:d7b17623ba26 82 nut.yes=0;
el14rd 2:d7b17623ba26 83 }
el14rd 2:d7b17623ba26 84 void drawNut()
el14rd 2:d7b17623ba26 85 {
el14rd 2:d7b17623ba26 86 int X = rand()%84;
el14rd 2:d7b17623ba26 87 int Y = rand()%48;
el14rd 2:d7b17623ba26 88 lcd.drawCircle(X,Y,1,1);
el14rd 2:d7b17623ba26 89 }
eencae 0:026fa541af7a 90
el14rd 1:f682aeb462f1 91 void moveSnake()
el14rd 1:f682aeb462f1 92 {
el14rd 2:d7b17623ba26 93 snake.snakeX[0]+=1;
el14rd 2:d7b17623ba26 94 wait(0.2);
el14rd 2:d7b17623ba26 95
el14rd 2:d7b17623ba26 96 /*
el14rd 1:f682aeb462f1 97 if(joystick.direction != UNKNOWN&&joystick.direction != CENTRE) {
el14rd 2:d7b17623ba26 98
el14rd 1:f682aeb462f1 99 if(joystick.direction == RIGHT&&snake.direction!=LEFT) {
el14rd 2:d7b17623ba26 100 snake.direction= RIGHT;
el14rd 2:d7b17623ba26 101 snake.snakeX[0]+=1;
el14rd 1:f682aeb462f1 102
el14rd 1:f682aeb462f1 103 } else if(joystick.direction == LEFT&&snake.direction!=RIGHT) {
el14rd 2:d7b17623ba26 104 snake.direction=LEFT;
el14rd 2:d7b17623ba26 105 snake.snakeX[0]-=1;
el14rd 1:f682aeb462f1 106 } else if(joystick.direction == UP&&snake.direction!=DOWN) {
el14rd 2:d7b17623ba26 107 snake.direction=DOWN;
el14rd 1:f682aeb462f1 108 snake.snakeY[0]-=1;
el14rd 1:f682aeb462f1 109 } else if(joystick.direction == DOWN&&snake.direction!=UP) {
el14rd 2:d7b17623ba26 110 snake.direction=UP;
el14rd 1:f682aeb462f1 111 snake.snakeY[0]+=1;
eencae 0:026fa541af7a 112 }
eencae 0:026fa541af7a 113
eencae 0:026fa541af7a 114 }
el14rd 2:d7b17623ba26 115 */
el14rd 2:d7b17623ba26 116 }
el14rd 2:d7b17623ba26 117
el14rd 2:d7b17623ba26 118 void initSnake()
el14rd 2:d7b17623ba26 119 {
el14rd 2:d7b17623ba26 120
el14rd 2:d7b17623ba26 121 snake.snakeX[0] = 10; //coordinate of head
el14rd 2:d7b17623ba26 122 snake.snakeY[0] = 10;
el14rd 2:d7b17623ba26 123 snake.snakeX[1] = 12;
el14rd 2:d7b17623ba26 124 snake.snakeY[1] = 10;
el14rd 2:d7b17623ba26 125 snake.snakeX[2] = 14;
el14rd 2:d7b17623ba26 126 snake.snakeY[2] = 10;
el14rd 2:d7b17623ba26 127 snake.snakeX[3] = 16;
el14rd 2:d7b17623ba26 128 snake.snakeY[3] = 10;
el14rd 2:d7b17623ba26 129 snake.node = 4; //node of snake
el14rd 2:d7b17623ba26 130
eencae 0:026fa541af7a 131 }
eencae 0:026fa541af7a 132
el14rd 1:f682aeb462f1 133 void drawSnake()
el14rd 1:f682aeb462f1 134 {
el14rd 1:f682aeb462f1 135
el14rd 2:d7b17623ba26 136 for(i=0; i<snake.node; i++) {
el14rd 1:f682aeb462f1 137
el14rd 2:d7b17623ba26 138 lcd.drawRect(snake.snakeX[i],snake.snakeY[i],1,1,1);
el14rd 2:d7b17623ba26 139 //lcd.setPixel(snake.snakeX[i],snake.snakeY[i]);
el14rd 1:f682aeb462f1 140 }
el14rd 1:f682aeb462f1 141 }
el14rd 1:f682aeb462f1 142
el14rd 1:f682aeb462f1 143 /*
el14rd 1:f682aeb462f1 144 */
el14rd 1:f682aeb462f1 145
el14rd 1:f682aeb462f1 146 void startGmae()
el14rd 1:f682aeb462f1 147 {
el14rd 2:d7b17623ba26 148 //lcd.drawRect(snake.snakeX[0]+10,snake.snakeY[0]+10,10,10,1);
el14rd 2:d7b17623ba26 149 nut.yes = 0;
el14rd 1:f682aeb462f1 150 snake.life = 0;
el14rd 2:d7b17623ba26 151 //snake.direction=LEFT;
el14rd 1:f682aeb462f1 152
el14rd 1:f682aeb462f1 153 //if(joystick.direction == UNKNOWN)
el14rd 1:f682aeb462f1 154 //{
el14rd 1:f682aeb462f1 155
el14rd 2:d7b17623ba26 156 if(nut.yes==0) { //set nut randomly
el14rd 1:f682aeb462f1 157 nut.X = rand()%83;
el14rd 1:f682aeb462f1 158 nut.Y = rand()%47;
el14rd 2:d7b17623ba26 159 nut.yes = 1;
el14rd 2:d7b17623ba26 160 drawNut();
el14rd 1:f682aeb462f1 161 }
el14rd 2:d7b17623ba26 162
el14rd 1:f682aeb462f1 163
el14rd 1:f682aeb462f1 164 for(i=3; i<snake.node; i++) { //if snake collide itself snake die
el14rd 1:f682aeb462f1 165 if(snake.snakeX[i]==snake.snakeX[0] && snake.snakeY[i]==snake.snakeY[0]) {
el14rd 1:f682aeb462f1 166 snake.life=1;
el14rd 1:f682aeb462f1 167 // break;
el14rd 1:f682aeb462f1 168 }
el14rd 1:f682aeb462f1 169 }
el14rd 1:f682aeb462f1 170
el14rd 1:f682aeb462f1 171 for(i=snake.node-1; i>0; i--) { //move snake
el14rd 1:f682aeb462f1 172 snake.snakeX[i]=snake.snakeX[i-1];
el14rd 1:f682aeb462f1 173 snake.snakeY[i]=snake.snakeY[i-1];
el14rd 1:f682aeb462f1 174 }
el14rd 1:f682aeb462f1 175
el14rd 1:f682aeb462f1 176 if(snake.snakeX[0]<1||snake.snakeX[0]>83||snake.snakeY[0]<1||snake.snakeY[0]>47) {
el14rd 1:f682aeb462f1 177 snake.life=1; // snake collide the corrider snake die
el14rd 1:f682aeb462f1 178 //break;
el14rd 1:f682aeb462f1 179 }
el14rd 1:f682aeb462f1 180
el14rd 1:f682aeb462f1 181
el14rd 1:f682aeb462f1 182 if(snake.life==1) {
el14rd 1:f682aeb462f1 183 //break;
el14rd 1:f682aeb462f1 184 }
el14rd 1:f682aeb462f1 185 if(snake.snakeX[0]==nut.X && snake.snakeY[0]==nut.Y) { // if snake got nut
el14rd 1:f682aeb462f1 186 snake.node++;
el14rd 1:f682aeb462f1 187 nut.yes=1; // new nut appear
el14rd 1:f682aeb462f1 188 }
el14rd 1:f682aeb462f1 189 //}
el14rd 1:f682aeb462f1 190
el14rd 1:f682aeb462f1 191 }
el14rd 1:f682aeb462f1 192
el14rd 1:f682aeb462f1 193
el14rd 1:f682aeb462f1 194 //while(joystick.direction == UNKNOWN) {
el14rd 1:f682aeb462f1 195
el14rd 1:f682aeb462f1 196
el14rd 1:f682aeb462f1 197 //switch(snake.direction)
el14rd 1:f682aeb462f1 198 //{
el14rd 1:f682aeb462f1 199 // case RIGHT:snake.X[0]+=1;
el14rd 1:f682aeb462f1 200 // break;    
el14rd 1:f682aeb462f1 201 // case LEFT:snake.X[0]-=1;
el14rd 1:f682aeb462f1 202 // break;     
el14rd 1:f682aeb462f1 203 // case UP:snake.Y[0]-=1;
el14rd 1:f682aeb462f1 204 // break;
el14rd 1:f682aeb462f1 205 // case DOWN:snake.Y[0]+=1;
el14rd 1:f682aeb462f1 206 // break;
el14rd 1:f682aeb462f1 207 // }
el14rd 1:f682aeb462f1 208
el14rd 1:f682aeb462f1 209 //end of while(joystick.direction = UNKNOWN)
el14rd 1:f682aeb462f1 210
el14rd 1:f682aeb462f1 211
el14rd 1:f682aeb462f1 212 // if(joystick.direction == UP&&snake.direction!=DOWN) {
el14rd 1:f682aeb462f1 213 // snake.direction=UP;
el14rd 1:f682aeb462f1 214 // } else if(joystick.direction == RIGHT&&snake.direction!=LEFT) {
el14rd 1:f682aeb462f1 215 // snake.direction= RIGHT;
el14rd 1:f682aeb462f1 216 // } else if(joystick.direction == LEFT&&snake.direction!=RIGHT) {
el14rd 1:f682aeb462f1 217 // snake.direction=LEFT;
el14rd 1:f682aeb462f1 218 // } else(joystick.direction == DOWN&&snake.direction!=UP) {
el14rd 1:f682aeb462f1 219 // snake.direction=DOWN;
el14rd 1:f682aeb462f1 220 // }
el14rd 1:f682aeb462f1 221
el14rd 1:f682aeb462f1 222
el14rd 1:f682aeb462f1 223
eencae 0:026fa541af7a 224 // read default positions of the joystick to calibrate later readings
eencae 0:026fa541af7a 225 void calibrateJoystick()
eencae 0:026fa541af7a 226 {
eencae 0:026fa541af7a 227 button.mode(PullDown);
eencae 0:026fa541af7a 228 // must not move during calibration
eencae 0:026fa541af7a 229 joystick.x0 = xPot; // initial positions in the range 0.0 to 1.0 (0.5 if centred exactly)
eencae 0:026fa541af7a 230 joystick.y0 = yPot;
eencae 0:026fa541af7a 231 }
el14rd 1:f682aeb462f1 232
el14rd 2:d7b17623ba26 233
eencae 0:026fa541af7a 234 void updateJoystick()
eencae 0:026fa541af7a 235 {
eencae 0:026fa541af7a 236 // read current joystick values relative to calibrated values (in range -0.5 to 0.5, 0.0 is centred)
eencae 0:026fa541af7a 237 joystick.x = xPot - joystick.x0;
eencae 0:026fa541af7a 238 joystick.y = yPot - joystick.y0;
eencae 0:026fa541af7a 239 // read button state
eencae 0:026fa541af7a 240 joystick.button = button;
eencae 0:026fa541af7a 241
eencae 0:026fa541af7a 242 // calculate direction depending on x,y values
eencae 0:026fa541af7a 243 // tolerance allows a little lee-way in case joystick not exactly in the stated direction
eencae 0:026fa541af7a 244 if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
eencae 0:026fa541af7a 245 joystick.direction = CENTRE;
eencae 0:026fa541af7a 246 } else if ( joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
eencae 0:026fa541af7a 247 joystick.direction = UP;
el14rd 1:f682aeb462f1 248 //snake.direction = UP;
eencae 0:026fa541af7a 249 } else if ( joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
eencae 0:026fa541af7a 250 joystick.direction = DOWN;
eencae 0:026fa541af7a 251 } else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
eencae 0:026fa541af7a 252 joystick.direction = RIGHT;
eencae 0:026fa541af7a 253 } else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
eencae 0:026fa541af7a 254 joystick.direction = LEFT;
eencae 0:026fa541af7a 255 } else {
eencae 0:026fa541af7a 256 joystick.direction = UNKNOWN;
eencae 0:026fa541af7a 257 }
eencae 0:026fa541af7a 258 // set flag for printing
eencae 0:026fa541af7a 259 printFlag = 1;
el14rd 1:f682aeb462f1 260 }
el14rd 1:f682aeb462f1 261
el14rd 1:f682aeb462f1 262 void updateSnake()
el14rd 1:f682aeb462f1 263 {
el14rd 1:f682aeb462f1 264 // get direction of joystick and update snake
el14rd 1:f682aeb462f1 265 if (joystick.direction == UP) {
el14rd 2:d7b17623ba26 266 snake.snakeX[0]--;
el14rd 1:f682aeb462f1 267 if(snake.snakeY[0]<1) {
el14rd 1:f682aeb462f1 268 snake.snakeY[0]=1;
el14rd 1:f682aeb462f1 269 }//will stop at the top edge
el14rd 1:f682aeb462f1 270
el14rd 1:f682aeb462f1 271 }
el14rd 1:f682aeb462f1 272 if (joystick.direction == DOWN) {
el14rd 2:d7b17623ba26 273 snake.snakeX[0]++;
el14rd 1:f682aeb462f1 274 if(snake.snakeY[0]>43) {
el14rd 1:f682aeb462f1 275 snake.snakeY[0]=43;
el14rd 1:f682aeb462f1 276 }//will stop at the bottom edge
el14rd 1:f682aeb462f1 277 }
el14rd 1:f682aeb462f1 278 if (joystick.direction == LEFT) {
el14rd 2:d7b17623ba26 279 snake.snakeY[0]--;
el14rd 1:f682aeb462f1 280 if(snake.snakeX[0]<1) {
el14rd 1:f682aeb462f1 281 snake.snakeX[0]=1;
el14rd 1:f682aeb462f1 282 }//will stop at the left edge
el14rd 1:f682aeb462f1 283
el14rd 1:f682aeb462f1 284 }
el14rd 1:f682aeb462f1 285 if (joystick.direction == RIGHT) {
el14rd 2:d7b17623ba26 286 snake.snakeY[0]++;
el14rd 1:f682aeb462f1 287 if(snake.snakeX[0]>87) {
el14rd 1:f682aeb462f1 288 snake.snakeX[0]=87;
el14rd 1:f682aeb462f1 289 }//will stop at the right edge
el14rd 1:f682aeb462f1 290
el14rd 1:f682aeb462f1 291 }
el14rd 1:f682aeb462f1 292
el14rd 1:f682aeb462f1 293 }
el14rd 1:f682aeb462f1 294
el14rd 1:f682aeb462f1 295
el14rd 2:d7b17623ba26 296
el14rd 1:f682aeb462f1 297 //main code
el14rd 1:f682aeb462f1 298 int main()
el14rd 1:f682aeb462f1 299 {
el14rd 1:f682aeb462f1 300 lcd.init();
el14rd 1:f682aeb462f1 301 lcd.setBrightness(0.5); // put LED backlight on 50%
el14rd 1:f682aeb462f1 302 lcd.printString("press to start",0,0);
el14rd 1:f682aeb462f1 303 calibrateJoystick(); // get centred values of joystick
el14rd 1:f682aeb462f1 304 pollJoystick.attach(&updateJoystick,1.0/10.0); // read joystick 10 times per second
el14rd 1:f682aeb462f1 305 lcd.refresh();
el14rd 2:d7b17623ba26 306 initNut();
el14rd 2:d7b17623ba26 307 initSnake();
el14rd 1:f682aeb462f1 308
el14rd 1:f682aeb462f1 309 //for(i=20,i<83,i++){
el14rd 1:f682aeb462f1 310 // i=i;
el14rd 1:f682aeb462f1 311 // j=j;
el14rd 1:f682aeb462f1 312 // wait(0.5);
el14rd 1:f682aeb462f1 313 // }
el14rd 1:f682aeb462f1 314
el14rd 1:f682aeb462f1 315 //infinite while loop
el14rd 1:f682aeb462f1 316 while(1) {
el14rd 2:d7b17623ba26 317
el14rd 2:d7b17623ba26 318 if (printFlag) { // if flag set, clear flag and print joystick values to serial port
el14rd 2:d7b17623ba26 319 printFlag = 0;
el14rd 2:d7b17623ba26 320 serial.printf("x = %f y = %f button = %d ",joystick.x,joystick.y,joystick.button);
el14rd 2:d7b17623ba26 321
el14rd 2:d7b17623ba26 322 // check joystick direction
el14rd 2:d7b17623ba26 323 if (joystick.direction == UP)
el14rd 2:d7b17623ba26 324 serial.printf(" UP\n");
el14rd 2:d7b17623ba26 325 if (joystick.direction == DOWN)
el14rd 2:d7b17623ba26 326 serial.printf(" DOWN\n");
el14rd 2:d7b17623ba26 327 if (joystick.direction == LEFT)
el14rd 2:d7b17623ba26 328 serial.printf(" LEFT\n");
el14rd 2:d7b17623ba26 329 if (joystick.direction == RIGHT)
el14rd 2:d7b17623ba26 330 serial.printf(" RIGHT\n");
el14rd 2:d7b17623ba26 331 if (joystick.direction == CENTRE)
el14rd 2:d7b17623ba26 332 serial.printf(" CENTRE\n");
el14rd 2:d7b17623ba26 333 if (joystick.direction == UNKNOWN)
el14rd 2:d7b17623ba26 334 serial.printf(" Unsupported direction\n");
el14rd 2:d7b17623ba26 335 }
el14rd 1:f682aeb462f1 336 lcd.clear();
el14rd 1:f682aeb462f1 337 updateSnake();
el14rd 1:f682aeb462f1 338 drawSnake();
el14rd 2:d7b17623ba26 339 drawNut();
el14rd 1:f682aeb462f1 340 moveSnake();
el14rd 1:f682aeb462f1 341 startGmae();
el14rd 1:f682aeb462f1 342 lcd.refresh();
el14rd 2:d7b17623ba26 343 wait(0.5);
el14rd 2:d7b17623ba26 344
el14rd 2:d7b17623ba26 345 serial.printf(" hi");
el14rd 1:f682aeb462f1 346 }
el14rd 2:d7b17623ba26 347 //wait(0.5);
el14rd 2:d7b17623ba26 348 //if(snake.life==1) {
el14rd 2:d7b17623ba26 349 // lcd.printString("lost",24,42);
el14rd 2:d7b17623ba26 350 // break;
el14rd 2:d7b17623ba26 351
el14rd 1:f682aeb462f1 352
el14rd 1:f682aeb462f1 353 }
el14rd 1:f682aeb462f1 354