ELEC2645 (2015/16)
ELEC2645 Embedded Systems Project (JOYSTICK)
Dependencies: N5110 SDFileSystem mbed
Diff: main.cpp
- Revision:
- 2:537b8388dc6a
- Parent:
- 1:06958b7bbf65
- Child:
- 4:f17082a43006
--- a/main.cpp Thu May 05 15:03:15 2016 +0000
+++ b/main.cpp Sat May 07 14:35:21 2016 +0000
@@ -1,99 +1,27 @@
-/*
-Progress update:
-Easter -- Added ticker for joystick update
- joystick initial position checker
-
-week 22 -- main logic behind snake game added
- to do : wraparound (optional in main menu)
- menu system - play game, settings(joy calibration, wraparound on//off) ; game over screen
-*/
-
-
-#include "mbed.h"
-#include "N5110.h"
-#include "SDFileSystem.h"
-#define JOYSTICK_TOLERANCE 0.1 //direction tolerance of joystick
-
-// VCC, SCE, RST, D/C, MOSI, SCLK, LED
-N5110 lcd (PTE26 , PTA0 , PTC4 , PTD0 , PTD2 , PTD1 , PTC3);
-SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd");
-
-void init_display();
-void draw_screen();
-void calibrate_joystick();
-void joystick_pos();
-void game_timer_isr();
-void food_pos();
-void snake_move();
-void snake_logic_1();
-float refresh_rate = 10; //refresh screen in Hz
-volatile int g_timer_flag = 0;
-bool gameOver; //if game has ended
-int pdirection;
-int gamemode;
-
-const int width = (84 - 2) / 2 ; // screen width (playable area due to 2x size of snake)
-const int height = (48 - 4) / 2 ; // screen height
+#include "main.h"
-Ticker gameTimer;
-Ticker gameTimer1;
-Ticker gameTimer2;
-Ticker joystickTimer; // ticker timer for joystick poisition update
-int fx,fy,Button,score; // global variables to hold data (control)
-AnalogIn xAxis(A0);
-AnalogIn yAxis(A1);
-AnalogIn pot(A2);
-DigitalOut red_led(LED_RED);
-
-
-
-enum DirectionName { //joystick directions
- CENTRE,
- UP,
- LEFT,
- DOWN,
- RIGHT,
- UNKNOWN
-};
-
-;
-// struct for joystick
-typedef struct joystick1 Joystick;
-struct joystick1 {
- float x; // current x value
- float x0; // 'centred' x value
- float y; // current y value
- float y0; // 'centred' y value
- int button; // button state (assume pull-down used, so 1 = pressed, 0 = unpressed)
- DirectionName direction; // current direction
-};
-
-Joystick joystick;
-
-typedef struct snake1 Snake;
-struct snake1 {
- int hx; // head x value
- int hy; // head y value
- int length; // snake length
- int tailx[100],taily[100]; //tail coordinates array
-};
-
-Snake snake;
-
-
+int main()
+{
+ Butt1.rise(butt1_isr); ///initializes the buttons IntterruptIn
+ Butt1.mode(PullDown);
+ Butt2.rise(butt2_isr);
+ Butt2.mode(PullDown);
+ init_display();
+ joystickTimer.attach(joystick_pos,0.1);
+ calibrate_joystick();
+ gamemode = 0;
+ LED = 0;
+ level = 2.0; ///default level
+ levelcalc = 0.4; /// default speed
+ main_menu();
+}
void init_display()
{
lcd.init();
- lcd.normalMode(); // normal colour mode
- lcd.setBrightness(0.5); // put LED backlight on 50%
- lcd.clear(); // clear screen (init)
-}
-
-void adjust_brightness()
-{
- int x = pot;
- lcd.setBrightness(x);
+ lcd.normalMode(); /// normal colour mode
+ lcd.setBrightness(0.5); /// put LED backlight on 50%
+ lcd.clear(); /// clear screen (init)
}
@@ -101,29 +29,24 @@
{
lcd.clear();
- lcd.drawRect(0,1,83,45,0); // borders square
+ lcd.drawRect(0,1,83,45,0); /// borders square
- for (int q = 0; q < snake.length ; q++) { //print snake
- //lcd.setPixel (snake.tailx[q],snake.taily[q]);
+ for (int q = 0; q < snake.length ; q++) { ///print snake
+
lcd.drawRect ((snake.tailx[q]*2),(snake.taily[q]*2),1,1,1);
- // red_led = 0;
}
- //lcd.setPixel(snake.hx,snake.hy); //print snake head position
- lcd.drawRect ((fx * 2), (fy * 2), 1,1,1);
- //lcd.setPixel (fx,fy); //print food position
- lcd.refresh(); // update display
+
+ lcd.drawRect ((fx * 2), (fy * 2), 1,1,1); /// print food position
+
+ lcd.refresh(); /// update display
}
-void game_timer_isr()
-{
- g_timer_flag = 1;
-}
void calibrate_joystick()
{
- //get initial joystick position as offset
+ ///get initial joystick position as offset
joystick.x0 = xAxis;
joystick.y0 = yAxis;
@@ -151,16 +74,15 @@
}
-void snake_move() //move the coordinate of the snake head, if CENTRE, checks for pdirection and repeats.
+void snake_move() ///move the coordinate of the snake head, if CENTRE, checks for pdirection and repeats.
{
- // red_led = 0;
- if (pdirection == 0 && joystick.direction == RIGHT) { // disable going backwards
+ if (pdirection == 0 && ( joystick.direction == RIGHT || joystick.direction == UNKNOWN ) ) { /// disable going backwards
snake.hx--;
- } else if (pdirection == 1 && joystick.direction == DOWN) {
+ } else if (pdirection == 1 && ( joystick.direction == DOWN || joystick.direction == UNKNOWN ) ) {
snake.hy++;
- } else if (pdirection == 2 && joystick.direction == LEFT) {
+ } else if (pdirection == 2 && ( joystick.direction == LEFT || joystick.direction == UNKNOWN ) ) {
snake.hx++;
- } else if (pdirection == 3 && joystick.direction == UP) {
+ } else if (pdirection == 3 && ( joystick.direction == UP || joystick.direction == UNKNOWN ) ) {
snake.hy--;
} else {
@@ -188,6 +110,7 @@
} else if (joystick.direction == DOWN) {
snake.hy-- ;
pdirection = 3;
+ } else if (joystick.direction == UNKNOWN) {
} else {
}
@@ -197,170 +120,442 @@
void game()
{
- //brightnessTimer.attach(adjust_brightness,0.1);
+
joystickTimer.detach();
gameTimer.detach();
gameTimer1.detach();
gameTimer2.detach();
joystick.direction = CENTRE;
- // gamemode = 0;
+ gamemode = 0;
gameOver = false;
- snake.hx = width / 2; // initial position of snake head
+ snake.hx = width / 2; /// initial position of snake head
snake.hy = height / 2;
food_pos();
score = 0;
pdirection = 1;
- snake.length = 4; //length including head and tail
- for (int w = 0 ; w < snake.length ; w++) { //set initial snake position
+ snake.length = 4; ///length including head and tail
+ for (int w = 0 ; w < snake.length ; w++) { ///set initial snake position
snake.tailx[w] = (snake.hx - w) ;
snake.taily[w] = snake.hy;
}
- //draw_screen();
-
-
-
if (gamemode == 0) {
+ joystickTimer.attach(&joystick_pos, 0.1);
+ gameTimer1.attach(&snake_logic_1, levelcalc);
+ gameTimer2.attach(&draw_screen, 0.1);
+
while (!gameOver) {
- joystickTimer.attach(&joystick_pos, 0.1);
- // gameTimer.attach(&snake_move,0.2);
- gameTimer1.attach(&snake_logic_1,0.1);
- gameTimer2.attach(&draw_screen, 0.1);
+ butt2_flag = 0;
sleep();
+
+ if (butt2_flag == 1) {
+ butt2_flag = 0;
+ gameTimer1.detach();
+ gameTimer2.detach();
+ gamePaused_screen();
+ }
+
}
if (gameOver == true) {
gameTimer1.detach();
gameTimer2.detach();
-}
+ gameOver_screen();
}
}
+}
- void snake_logic_1() {
-//red_led = 0;
- snake_move();
- for (int d = (snake.length) ; d > 0 ; d--) { //move all snake body one position back
- snake.tailx[d] = snake.tailx[d - 1];
- snake.taily[d] = snake.taily[d - 1];
-
- }
- snake.tailx[0] = snake.hx;
- snake.taily[0] = snake.hy;
- // snake.hx = snake.tailx[0];
- // snake.hy = snake.taily[0];
+void snake_logic_1()
+{
- // snake_move();
- // draw_screen();
+ snake_move();
+ for (int d = (snake.length) ; d > 0 ; d--) { ///move all snake body one position back
+ snake.tailx[d] = snake.tailx[d - 1];
+ snake.taily[d] = snake.taily[d - 1];
- for (int p = 1; p < snake.length + 1; p++) { //snake dies when come in contact with tail
- if (snake.tailx[0] == snake.tailx[p] && snake.taily[0] == snake.taily[p]) {
- gameOver = true;
- red_led = 0;
- }
+ }
+ snake.tailx[0] = snake.hx;
+ snake.taily[0] = snake.hy;
-
-
- }
-
- if (snake.tailx[0] == 0 || snake.tailx[0] == width || snake.taily[0] == 1 || snake.taily[0] == height-1) {
+ for (int p = 1; p < snake.length + 1; p++) { ///snake dies when come in contact with tail
+ if (snake.tailx[0] == snake.tailx[p] && snake.taily[0] == snake.taily[p]) {
gameOver = true;
}
- if (snake.tailx[0] == fx && snake.taily[0] == fy) { // snake grows when in contact with food
- score++;
- food_pos();
- snake.length++;
- // draw_screen();
+ }
+
+ if (snake.tailx[0] == 0 ||
+ snake.tailx[0] == width ||
+ snake.taily[0] == 1 ||
+ snake.taily[0] == height) { /// snake dies when hit wall
+ gameOver = true;
+ }
+
+
+ if (snake.tailx[0] == fx && snake.taily[0] == fy) { // snake grows when in contact with food
+ score++;
+ food_pos();
+ snake.length++;
+ }
+}
+
+
+void food_pos()
+{
+ srand(time(NULL));
+ fx = rand() % (width - 3) + 2; // random x from 4 to width - 3 for x coordinate
+ fy = rand() % (height - 3) + 2; // random y from 4 to height - 3 for y coordinate
+
+}
+
+void main_menu()
+{
+ lcd.clear();
+ joystickTimer.detach();
+ gameTimer1.detach();
+ gameTimer2.detach();
+ joystickTimer.attach(joystick_pos,0.15);
+ butt1_flag = 0;
+ int select = 0;
+ while (1) {
+ switch(select) {
+ case 0:
+ switch(joystick.direction) {
+ case UP:
+ select = 1;
+ break;
+ case DOWN:
+ select = 2;
+ break;
+ }
+ break;
+ case 1:
+ switch(joystick.direction) {
+ case UP:
+ select = 2;
+ break;
+ case DOWN:
+ select = 0;
+ break;
+ }
+ break;
+ case 2:
+ switch(joystick.direction) {
+ case UP:
+ select = 0;
+ break;
+ case DOWN:
+ select = 1;
+ break;
+ }
+ break;
}
- //snake_move();
+ wait(0.1);
+ if (select == 0) {
+ lcd.clear();
+ lcd.printString("SNAKE",27,0);
+ lcd.printString("Start Game",7,2);
+ lcd.printString("High Scores",7,3);
+ lcd.printString("Settings",7,4);
+ lcd.drawCircle(3,19,2,1);
+ lcd.refresh();
+ wait(0.15);
+ if (butt1_flag == 1) {
+ butt1_flag = 0;
+ joystickTimer.detach();
+ game();
+ }
+ } else if (select == 1) {
+ lcd.clear();
+ lcd.printString("SNAKE",27,0);
+ lcd.printString("Start Game", 7,2);
+ lcd.printString("High Scores",7,3);
+ lcd.printString("Settings",7,4);
+ lcd.drawCircle(3,27,2,1);
+ lcd.refresh();
+ wait(0.15);
+ if (butt1_flag == 1) {
+ butt1_flag = 0;
+ HiScoreScreen();
+ }
+ } else if (select == 2) {
+ lcd.clear();
+ lcd.printString("SNAKE",27,0);
+ lcd.printString("Start Game", 7,2);
+ lcd.printString("High Scores",7,3);
+ lcd.printString("Settings",7,4);
+ lcd.drawCircle(3,35,2,1);
+ lcd.refresh();
+ wait(0.15);
+ if (butt1_flag == 1) {
+ butt1_flag = 0;
+ settingsScreen();
+ }
+
+
+ }
+ }
+}
+
+void HiScoreScreen()
+{
+ lcd.clear();
+ fp = fopen("/sd/hiscore.txt","r");
+ while (butt2_flag == 0) {
+
+ if (fp == NULL) { /// if high scores file not found
+ lcd.printString("High Scores:", 9,0);
+
+ lcd.printString("No high", 21,3);
+ lcd.printString("scores found",9,4);
+
+ sleep();
+
+ fclose(fp);
+ } else {
+ lcd.printString("High Scores:", 9,0);
+ lcd.printString("Level 1:", 9,1);
+ lcd.printString("Level 2:", 9,2);
+ lcd.printString("Level 3:", 9,3);
+ lcd.printString("Level 4:", 9,4);
+ lcd.printString("Level 5:", 9,5);
+
+ int o; ///index of file
+ while (fscanf(fp, "%d,%d \n", &level_array[o],&HiScoreTable[o]) != EOF) {
+ o++;
+ }
+
+ for (int lvl2 = 0; lvl2 <5 ; lvl2++) {
+ char lvlscore[14]; ///char to print highscore
+ sprintf(lvlscore,"%d",HiScoreTable[lvl2]); ///print highscore to char
+ lcd.printString ( lvlscore, 64, (lvl2+1)); ///print highscore on screen
+ }
+ }
+ fclose(fp);
+ lcd.refresh();
+ sleep();
+
+ }
+
+ if (butt2_flag == 1) {
+ butt2_flag = 0;
+ main_menu();
+ butt1_flag = 0;
}
-
+}
- void food_pos() {
- srand(time(NULL));
- fx = rand() % (width - 3) + 2; // random x from 4 to width - 3 for x coordinate
- fy = rand() % (height - 3) + 2; // random y from 4 to height - 3 for y coordinate
+void settingsScreen()
+{
+ lcd.clear();
+ lcd.printString("Settings",18,0);
+ int levelsel = 2;
+ while (butt2_flag == 0) {
+ switch(levelsel) {
+ case 1:
+ switch(joystick.direction) {
+ case RIGHT:
+ level = 2.0;
+ levelsel = 2;
+ break;
+ case LEFT:
+ level = 5.0;
+ levelsel = 5;
+ break;
+ }
+ break;
+ case 2:
+ switch(joystick.direction) {
+ case RIGHT:
+ level = 3.0;
+ levelsel = 3;
+ break;
+ case LEFT:
+ level = 1.0;
+ levelsel = 1;
+ break;
+ }
+ break;
+ case 3:
+ switch(joystick.direction) {
+ case RIGHT:
+ level = 4.0;
+ levelsel = 4;
+ break;
+ case LEFT:
+ level = 2.0;
+ levelsel = 2;
+ break;
+ }
+ break;
+ case 4:
+ switch(joystick.direction) {
+ case RIGHT:
+ level = 5.0;
+ levelsel = 5;
+
+ break;
+ case LEFT:
+ level = 3.0;
+ levelsel = 3;
+ }
+ break;
+ case 5:
+ switch(joystick.direction) {
+ case RIGHT:
+ level = 1.0;
+ levelsel = 1;
+ break;
+ case LEFT:
+ level = 4.0;
+ levelsel = 4;
+ break;
+ }
+ break;
+ }
+
+ if (level == 1) {
+ lcd.printString("Level: < 1 >",6,3);
+ levelcalc = 0.4;
+ lcd.refresh();
+ sleep();
+ } else if (level == 2) {
+ lcd.printString("Level: < 2 >",6,3);
+ levelcalc = 0.33;
+ lcd.refresh();
+ sleep();
+ } else if (level == 3) {
+ lcd.printString("Level: < 3 >",6,3);
+ levelcalc = 0.25;
+ lcd.refresh();
+ sleep();
+ } else if (level == 4) {
+ lcd.printString("Level: < 4 >",6,3);
+ levelcalc = 0.15;
+ lcd.refresh();
+ sleep();
+ } else if (level == 5) {
+ lcd.printString("Level: < 5 >",6,3);
+ levelcalc = 0.1;
+ lcd.refresh();
+ sleep();
+ }
}
- void main_menu() {
- //brightnessTimer.attach(adjust_brightness,0.1);
- joystickTimer.attach(joystick_pos,0.1);
- int select = 0;
- while (1) {
- switch(select) {
- case 0:
- switch(joystick.direction) {
- case UP:
- select = 1;
- break;
- case DOWN:
- select = 1;
- break;
- }
- break;
- case 1:
- switch(joystick.direction) {
- case UP:
- select = 0;
- break;
- case DOWN:
- select = 0;
- break;
- }
- break;
+ if (butt2_flag == 1) {
+ butt2_flag = 0;
+ lcd.clear();
+ butt1_flag = 0;
+ main_menu();
+ }
+}
+
+void gameOver_screen()
+{
+ gameTimer1.detach();
+ gameTimer2.detach();
+
+ while (butt2_flag == 0) {
+ fp = fopen("/sd/hiscore.txt","r"); //read high score
+ wait(0.5);
+ lcd.clear();
+
+ lcd.printString("Game Over",15,1);
+ char scorebuffer[14];
+ int length = sprintf(scorebuffer, "Score = %d",score);
+ if (length <=14) {
+ lcd.printString(scorebuffer,12,2);
+ }
+
+ if (fp == NULL) { ///if high score file doesnt exist
+ fp = fopen("/sd/hiscore.txt","w"); /// create new high score
+ for (int lvl = 1; lvl < 6; lvl ++) { ///prints all level score as zero (initialize)
+ fprintf(fp,"%d,0 \n", lvl);
}
- wait(0.1);
- if (select == 0) {
- lcd.clear();
- lcd.printString("Start Game",7,0);
- lcd.printString("Settings",7,1);
- lcd.drawCircle(3,3,2,1);
- lcd.refresh();
- } else if (select == 1) {
- lcd.clear();
- lcd.printString("Start Game", 7,0);
- lcd.printString("Settings",7,1);
- lcd.drawCircle(3,11,2,1);
- lcd.refresh();
+ fprintf(fp,"%d,%d \n", level, score); /// print the score of the current game according to level
+
+ lcd.printString("New Highscore!",0,4);
+ fclose(fp);
+ sleep();
+
+ if (butt2_flag == 1) {
+ butt2_flag = 0;
+ main_menu();
+ gameTimer1.detach();
+ gameTimer2.detach();
+ butt1_flag = 0;
+ }
+
+ } else { /// if file exists
+ rewind(fp);
+ int o; ///index of file, just for counter
+ while (fscanf(fp, "%d, %d \n", &level_array[o],&HiScoreTable[o]) != EOF) { //read file data into array
+ o++;
+ }
+
+ if (score > HiScoreTable[(level - 1)]) { ///if current score is higher than HiScore(current level)
+ lcd.printString("New Highscore!",0,4);
+
+ HiScoreTable[(level - 1)] = score; ///save high score in table
+ }
+
+
+ fp = fopen("/sd/hiscore.txt","w"); /// overwrite score file
+ for (int b = 0; b < 5; b++) { ///write table to SD file
+ fprintf(fp, "%d,%d \n",b,HiScoreTable[b]);
+ fclose(fp);
+ sleep();
+ }
+
+ if (butt2_flag == 1) {
+ butt2_flag = 0;
+ main_menu();
+ gameTimer1.detach();
+ gameTimer2.detach();
+ butt1_flag = 0;
}
}
+
+ }
+}
+
+void gamePaused_screen()
+{
+ while(butt2_flag == 0) {
+ gameTimer1.detach();
+ gameTimer2.detach();
+ LED = 1; /// toggle LED to show game is paused
+ butt2_flag = 0;
+ lcd.drawRect (4,4,74,38,2);
+ lcd.drawRect (4,4,74,38,0);
+ lcd.printString ("Game Paused",8,1);
+ lcd.printString ("Press button",6,3);
+ lcd.printString ("to unpause.",9,4);
+ sleep();
+ }
+ if (butt2_flag == 1) {
+ butt2_flag = 0;
+ lcd.clear();
+ draw_screen();
+ wait(0.5);
+ gameTimer1.attach(&snake_logic_1,(levelcalc));
+ gameTimer2.attach(&draw_screen, 0.1);
+ LED = 0;
}
- int main() {
- init_display();
- //brightnessTimer.attach(adjust_brightness,0.1);
- joystickTimer.attach(joystick_pos,0.1);
- calibrate_joystick();
- gamemode = 0;
- //lcd.printString("Hello, World!",0,0);
- //main_menu();
- red_led = 1;
- game();
- /*while(1) {
-
- lcd.clear();
- if (joystick.direction == UP) {
- lcd.printString ("UP",1,0);
- } else if (joystick.direction == CENTRE) {
- lcd.printString ("CENTRE",1,0);
- } else if (joystick.direction == DOWN) {
- lcd.printString ("DOWN",1,0);
- } else if (joystick.direction == LEFT) {
- lcd.printString ("LEFT",1,0);
- } else if (joystick.direction == RIGHT) {
- lcd.printString ("RIGHT",1,0);
- } else {
- lcd.printString ("UNKNOWN",1,0);
- }
- lcd.refresh();
- wait(1);
- }
- */
+}
- }
+void butt1_isr()
+{
+ butt1_flag = 1;
+}
+
+void butt2_isr()
+{
+ butt2_flag = 1;
+}