fsmSnakemain.h

00001 /**
00002 @file fsmSnakemain.h
00003 @file Header file containing functions prototypes,defines and gloabal variables. 
00004 @Author  Dean Griffin
00005 @date April 2016
00006 */
00007 
00008 #ifndef FSMSNAKE_H
00009 #define FSMSNAKE_H
00010 
00011 #include "mbed.h"
00012 #include "N5110.h"
00013 
00014 // change this to alter tolerance of joystick direction
00015 #define DIRECTION_TOLERANCE 0.05f
00016 
00017 /**
00018 @namespace lcd
00019 @brief lcd object
00020 */
00021 //         VCC,    SCE,   RST,   D/C,   MOSI,  SCLK,   LED
00022 N5110 lcd(PTE26 , PTA0 , PTC4 , PTD0 , PTD2 , PTD1 , PTC3); // connections for screen
00023 
00024 /**
00025 @namespace pc (USBTX USBRX);
00026 @brief serial for devu
00027 */
00028 
00029 /**
00030 @namespace button
00031 @brief Digital in for joystick button
00032 */
00033 DigitalIn button(PTB11); 
00034 /**
00035 @namespace xpot
00036 @brief analog in for joystick x co-ordinate
00037 */
00038 AnalogIn xPot(PTB2);
00039 /**
00040 @namespace ypot
00041 @brief analog in for joystick y co-ordinate
00042 */
00043 AnalogIn yPot(PTB3); 
00044 /**
00045 @namespace greenLED
00046 @brief digital out for green game playing LED
00047 */
00048 DigitalOut greenLED (PTD1); 
00049 /**
00050 @namespace redLED
00051 @brief digital out for red gameover LED
00052 */
00053 DigitalOut redLED(PTD0); 
00054 /**
00055 @namespace g_button_flag 
00056 @brief set flag in ISR
00057 */
00058 volatile int g_button_flag = 0;
00059 /**
00060 @namespace g_timer_flag 
00061 @brief set flag in ISR
00062 */
00063 volatile int g_timer_flag = 0;
00064 /**
00065 @namespace menu_isr
00066 @brief update menu flag when called
00067 */
00068 void menu_isr();
00069 /**
00070 @namespace button_isr
00071 @brief update button flag when called
00072 */
00073 void button_isr();
00074 
00075 
00076 // set-up the on-board LEDs and switches
00077 void init_K64F();
00078 
00079 // set-up the on-board LEDs and switches
00080 void init_K64F();
00081 
00082 
00083 
00084 Ticker pollJoystick, checkJoystick, menuTicker, moveSnake, gameTime;
00085 /** 
00086 flag for joystick ticker
00087 */
00088 volatile int g_joystickTimer_flag = 0;
00089 /** 
00090 flag for gametime ticker
00091 */
00092 volatile int g_gameTimer_flag = 0;
00093 
00094 /**brief serial out for debugging
00095 */
00096 
00097 /**
00098 @namespace pc
00099 @brief serial connection for mbed to pc
00100 */
00101 Serial pc(USBTX,USBRX);
00102 
00103 /**
00104 @namespace Directionname
00105 */
00106 enum DirectionName {
00107     UP,
00108     DOWN,
00109     LEFT,
00110     RIGHT,
00111     CENTRE,
00112     UNKNOWN
00113 };
00114 
00115 /**
00116 @namespace snakeDirection
00117 */
00118 enum snakeDirection {
00119     up,
00120     down,
00121     left,
00122     right,
00123 };
00124 
00125 /**
00126 @namespace joystick
00127 @brief creates strcut for joystick
00128 */
00129 typedef struct JoyStick Joystick;
00130 struct JoyStick {
00131     float x;    // current x value
00132     float x0;   // 'centred' x value
00133     float y;    // current y value
00134     float y0;   // 'centred' y value
00135     int button; // button state (assume pull-down used, so 1 = pressed, 0 = unpressed)
00136     DirectionName direction;  // current direction
00137 };
00138 // create struct variable
00139 Joystick joystick;
00140 
00141 int printFlag = 0;
00142 
00143 /** game functions
00144 */
00145 
00146 
00147 /** menu function contains all of the game logic to be called in the main
00148 */
00149 void menu();
00150 /** reads joysticks x and y pots
00151 */ 
00152 void calibrateJoystick();
00153 
00154 /** lets the joystick know which way its being pressed
00155 */
00156 
00157 void updateJoystick();
00158 
00159 /** joystick lets snake know which way to go
00160 */
00161 
00162 void checkDirection();
00163 
00164 /** initialises game settings
00165 */ 
00166 void gameSetup();
00167 
00168 
00169 /** determines the snakes direction of travel
00170 */
00171 void nextMoveSnake();
00172 
00173 /** displays snake in next position
00174 */ 
00175 
00176 void printFood();
00177 
00178 /** check if the snake has ate the food, then produced next snack
00179 */
00180 void generateFood();
00181 
00182 /** initialises the rules for and logic for classic snake mode
00183 */ 
00184 void classic ();
00185 
00186 /** initialises the rules for and logic for classic snake two mode
00187 */
00188 void snake2();
00189 
00190 /** sets snake on game area
00191 */
00192 
00193 void newSnake();
00194 
00195 /**  called by ticker to set next screen
00196 */
00197 
00198 void timer_isr();
00199 
00200 /** called by ticker to set snake in new position
00201 */ 
00202 
00203 void update_snake_isr();
00204 
00205 /** set joystick direction to snake direction
00206 */
00207 
00208 void newDirection();
00209 
00210 /** set hardwall for classic snake mode
00211 */
00212 
00213 void hardWall();
00214 
00215 /** allows snake to go through to other other side in maze and snake 2 mode
00216 */
00217 
00218 void wrapAround();
00219 
00220 /** function to make snake tail follow its head
00221 */
00222 void snakeTail();
00223 
00224 /** lets player know its game over if the snake has died
00225 */
00226 
00227 void game_over();
00228 /**
00229 */
00230 
00231 void gameTimer_ISR();
00232 
00233 /** sets rules and logic for maze mode
00234 */
00235 
00236 void maze();
00237 
00238 /**     variable 
00239 */
00240 
00241 int i;
00242 
00243 /**     store direction of snake
00244 */
00245     
00246 int snakeDirection;
00247 
00248 /** array determining game areas x axis
00249 */  
00250 int width [84]; 
00251 
00252 /** array determining game areas y axis
00253 */
00254 int height [48]; 
00255 
00256 /**      snakes head on the x -axis
00257 */
00258 
00259 int sx = 48; 
00260 
00261 /** snakes head on the y-axis
00262 */
00263 
00264 int sy = 24; //set snake at centre
00265 
00266 /** food on the x-axis
00267 */
00268 
00269 int fx; 
00270 
00271 /**  food on the y-axis
00272 */
00273 
00274 int fy; 
00275 
00276 /** stores game score
00277 */
00278 
00279 int score =  0;
00280 
00281 /** stores snake length
00282 */
00283 
00284 int tailL = 0;
00285 
00286 /** array to store snake tail on x axis
00287 */
00288 
00289 int tailX [100];
00290 
00291 /** array to store snake tail on the y axis
00292 */
00293 
00294 int tailY [100];
00295 
00296 /** true when the game is running
00297 */
00298     
00299 bool gameOver = false;
00300 
00301 #endif