Diff: main.cpp

Revision:

0:075d80c9688d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu May 05 09:35:12 2016 +0000
@@ -0,0 +1,347 @@
+#include "main.h"
+
+volatile int eat_flag = 0;
+
+void PacmanRight(int pacman_x, int pacman_y)    //draw the pacman that the mouth in the right
+{
+    for (int  m=pacman_x-1; m<=pacman_x+1; m++) 
+    {
+        lcd.setPixel (m, pacman_y-4);
+        lcd.setPixel (m, pacman_y+4);
+    }
+
+    for (int n=pacman_x-3; n<=pacman_x+3; n++) 
+    {
+        lcd.setPixel (n, pacman_y-3);
+        lcd.setPixel (n-1, pacman_y-1);
+        lcd.setPixel (n-1, pacman_y+1);
+        lcd.setPixel (n, pacman_y+3);
+    }
+
+    for (int p=pacman_x-3; p<=pacman_x+4; p++) 
+    {
+        lcd.setPixel (p, pacman_y-2);
+        lcd.setPixel (p, pacman_y+2);
+    }
+
+    for (int q=pacman_x-4; q<=pacman_x; q++) 
+    {
+        lcd.setPixel (q, pacman_y);
+    }
+}
+
+void PacmanLeft (int pacman_x, int pacman_y)    // draw the pacman that the mouth in the left
+{
+    for (int  m=pacman_x-1; m<=pacman_x+1; m++) 
+    {
+        lcd.setPixel (m, pacman_y-4);
+        lcd.setPixel (m, pacman_y+4);
+    }
+
+    for (int n=pacman_x-3; n<=pacman_x+3; n++) 
+    {
+        lcd.setPixel (n, pacman_y-3);
+        lcd.setPixel (n+1, pacman_y-1);
+        lcd.setPixel (n+1, pacman_y+1);
+        lcd.setPixel (n, pacman_y+3);
+    }
+
+    for (int p=pacman_x-4; p<=pacman_x+3; p++) 
+    {
+        lcd.setPixel (p, pacman_y-2);
+        lcd.setPixel (p, pacman_y+2);
+    }
+
+    for (int q=pacman_x; q<=pacman_x+4; q++) 
+    {
+        lcd.setPixel (q, pacman_y);
+    }
+}
+
+void PacmanDown(int pacman_x, int pacman_y)    //draw the pacman that the mouth in the below
+{
+    for (int  m=pacman_y-1; m<=pacman_y+1; m++) 
+    {
+        lcd.setPixel (pacman_x-4, m);
+        lcd.setPixel (pacman_x+4, m);
+    }
+
+    for (int n=pacman_y-3; n<=pacman_y+3; n++) 
+    {
+        lcd.setPixel (pacman_x-3, n);
+        lcd.setPixel (pacman_x-1, n-1);
+        lcd.setPixel (pacman_x+1, n-1);
+        lcd.setPixel (pacman_x+3, n);
+    }
+
+    for (int p=pacman_y-3; p<=pacman_y+4; p++) 
+    {
+        lcd.setPixel (pacman_x-2, p);
+        lcd.setPixel (pacman_x+2, p);
+    }
+
+    for (int q=pacman_y-4; q<=pacman_y; q++) 
+    {
+        lcd.setPixel (pacman_x, q);
+    }
+}
+
+void PacmanUp(int pacman_x, int pacman_y)    //draw the pacman that the mouth in the above
+{
+    for (int  m=pacman_y-1; m<=pacman_y+1; m++) 
+    {
+        lcd.setPixel (pacman_x-4, m);
+        lcd.setPixel (pacman_x+4, m);
+    }
+
+    for (int n=pacman_y-3; n<=pacman_y+3; n++) 
+    {
+        lcd.setPixel (pacman_x-3, n);
+        lcd.setPixel (pacman_x-1, n+1);
+        lcd.setPixel (pacman_x+1, n+1);
+        lcd.setPixel (pacman_x+3, n);
+    }
+
+    for (int p=pacman_y-4; p<=pacman_y+3; p++) 
+    {
+        lcd.setPixel (pacman_x-2, p);
+        lcd.setPixel (pacman_x+2, p);
+    }
+
+    for (int q=pacman_y; q<=pacman_y+4; q++) 
+    {
+        lcd.setPixel (pacman_x, q);
+    }
+}
+
+void Wall(int wall_x, int wall_y)        // draw the wall
+{
+    for (int k=wall_x; k<=wall_x+83; k++)   // the x direction of the wall
+    {      
+        lcd.setPixel (k, wall_y);
+        lcd.setPixel (k, wall_y+47);
+
+        for (int t=wall_y; t<=wall_y+47; t++)   // the y direction of the wall
+        {      
+            lcd.setPixel (wall_x, t);
+            lcd.setPixel (wall_x+83, t);
+        }
+    }
+}
+
+int main()
+{
+    // Use the joystick button to see the currently score
+    button.fall(&joystickbutton_isr);
+    // Set the operation of the button, pull down
+    button.mode(PullDown);
+    
+    // first need to initialise display
+    lcd.init();
+
+    // these are default settings so not strictly needed
+    lcd.normalMode();           // normal colour mode
+    lcd.setBrightness(0.5);     // put LED backlight on 50%
+
+    // can directly print strings at specified co-ordinates
+    lcd.printString("FOODIE",24,1);
+    lcd.printString("PACMAN",24,3);
+    wait(5.0);
+    lcd.clear();
+
+    //show the designer's name and student number
+    lcd.printString("by Wang Luyu",6,2);
+    lcd.printString("200985894",15,4);
+    wait(5.0);
+    lcd.clear();
+
+    calibrateJoystick();
+
+    // update the location by using Joystick
+    // every 0.05 second update the location
+    pollJoystick.attach(&updateJoystick,0.05);
+    yellow_led = 1;
+    
+    while(1) {
+        if (joystickbutton == true) 
+        {
+            // present the wall
+            Wall(Wall_X, Wall_Y);
+
+            // present the pacman
+            PacmanRight(Pacman_X, Pacman_Y);
+
+            // if the pacman touch the wall, game over and shows the score
+            if(Pacman_X-5 == 0||Pacman_X+5 == 83||Pacman_Y-5 == 0||Pacman_Y+5 == 47) 
+            {
+                gameover_flag = 1;
+            
+                if (gameover_flag == 1) 
+                {
+                    lcd.clear();
+                    lcd.printString("GAME OVER",15,1);
+                    char s[14];
+                    sprintf(s,"SCORE: %d",score);
+                    lcd.printString(s,15,3);
+                }
+                break;
+            }
+
+            if (printFlag)   // if flag set, clear flag and print joystick values to serial port
+            {
+                printFlag = 0;
+                yellow_led=0;
+                eat();
+                lcd.clear();
+                food();
+
+                // check joystick direction
+                if (joystick.direction == UP) 
+                {
+                    Pacman_Y += 1;
+                }
+
+                if (joystick.direction == DOWN) 
+                {
+                    Pacman_Y -= 1;
+                }
+
+                if (joystick.direction == LEFT) 
+                {
+                    Pacman_X += 1;
+                }
+
+                if (joystick.direction == RIGHT) 
+                {
+                    Pacman_X -= 1;
+                }
+
+                if (joystick.direction == CENTRE) 
+                {
+                    //PacmanRight(Pacman_X, Pacman_Y);
+                }
+            
+                if (joystick.direction == UNKNOWN) 
+                {
+                    //PacmanRight(Pacman_X, Pacman_Y);
+                }
+            }
+            lcd.refresh();   // need to refresh screen
+        }
+        
+        else
+        {
+            lcd.clear();
+            char s[14];
+            sprintf(s,"SCORE: %d",score);
+            lcd.printString(s,15,2);
+            lcd.refresh();
+        }
+    }
+}
+
+// read default positions of the joystick to calibrate later readings
+void calibrateJoystick()
+{
+    button.mode(PullDown);
+    
+    // must not move during calibration
+    joystick.x0 = xPot;  // initial positions in the range 0.0 to 1.0 (0.5 if centred exactly)
+    joystick.y0 = yPot;
+}
+
+void updateJoystick()
+{
+    // read current joystick values relative to calibrated values (in range -0.5 to 0.5, 0.0 is centred)
+    joystick.x = xPot - joystick.x0;
+    joystick.y = yPot - joystick.y0;
+
+    // read button state
+    joystick.button = button;
+
+    // calculate direction depending on x,y values
+    // tolerance allows a little lee-way in case joystick not exactly in the stated direction
+    if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
+        joystick.direction = CENTRE;
+    } else if ( joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
+        joystick.direction = UP;
+    } else if ( joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
+        joystick.direction = DOWN;
+    } else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
+        joystick.direction = RIGHT;
+    } else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
+        joystick.direction = LEFT;
+    } else {
+        joystick.direction = UNKNOWN;
+    }
+
+    // set flag for printing
+    printFlag = 1;
+}
+
+void eat()
+{
+    eat_flag = 0;
+    
+    // the right of the pacman can eat the point
+    // when the point on the right edge touch the point
+    // the pacman can 'eat' the 'food'
+    if (lcd.getPixel(Pacman_X+5,Pacman_Y-2)||lcd.getPixel(Pacman_X+5,Pacman_Y)||lcd.getPixel(Pacman_X+5,Pacman_Y+2)) {
+        eat_flag = 1;
+        yellow_led = 1;
+        score++;
+    }
+    
+    // the left of the pacman can eat the point
+    // when the point on the left edge touch the point
+    // the pacman can 'eat' the 'food'
+    if (lcd.getPixel(Pacman_X-5,Pacman_Y-2)||lcd.getPixel(Pacman_X-5,Pacman_Y)||lcd.getPixel(Pacman_X-5,Pacman_Y+2)) {
+        eat_flag = 1;
+        yellow_led = 1;
+        score++;
+    }
+    
+    // the top of the pacman can eat the point
+    // when the point on the upper edge touch the point
+    // the pacman can 'eat' the 'food'
+    if (lcd.getPixel(Pacman_X+2,Pacman_Y-5)||lcd.getPixel(Pacman_X,Pacman_Y-5)||lcd.getPixel(Pacman_X-2,Pacman_Y-5)) {
+        eat_flag = 1;
+        yellow_led = 1;
+        score++;
+    }
+    
+    // the bottom of the pacman can eat the point
+    // when the point on the bottom edge touch the point
+    // the pacman can 'eat' the 'food'
+    if (lcd.getPixel(Pacman_X+2,Pacman_Y+5)||lcd.getPixel(Pacman_X,Pacman_Y+5)||lcd.getPixel(Pacman_X-2,Pacman_Y+5)) {
+        eat_flag = 1;
+        yellow_led = 1;
+        score++;
+    } 
+}
+
+void food()
+{
+    if (eat_flag) {
+        // new food
+        x_square = rand()%(82-2)+2;
+        y_square = rand()%(46-2)+2;
+        lcd.drawRect(x_square,y_square,2,2,1);
+    } 
+    else if(eat_flag == 0) {
+        lcd.drawRect(x_square,y_square,2,2,1);
+    }
+}
+
+void yellow()
+{
+    // on-board LEDs are active-low, so set pin high to turn them off.
+    yellow_led = ! yellow_led;
+}
+
+
+void joystickbutton_isr()
+{
+    // use the joystick button to see the currently score
+    joystickbutton = !joystickbutton;
+}