Diff: Game.cpp

Revision:

31:5b4a4d225ab4

Parent:

30:4a03611a3d99

Child:

32:99ca304085e6

--- a/Game.cpp	Sat May 09 11:46:32 2015 +0000
+++ b/Game.cpp	Sat May 09 17:37:40 2015 +0000
@@ -16,11 +16,46 @@
 {
     StartFlag = 1;
 }
+/*
 void DirPressed()
 {
     DirFlag = 1;
 }
+*/
 
+//Joystick functions
+// 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;
+    }
+}
 
 
 //High score system
@@ -171,18 +206,14 @@
             Sleep();
         }
 
-        if (DirFlag) {
-
-            DirFlag = 0;
-
-            if(Up) {
-                if(menu > 0) {
-                    menu--;
-                }
-            } else if(Down) {
-                if(menu < 3) {
-                    menu++;
-                }
+        if (joystick.direction == Up) {
+            if(menu > 0) {
+                menu--;
+            }
+        }
+        if(joystick.direction == Down) {
+            if(menu < 3) {
+                menu++;
             }
         }
         if (ActFlag) {
@@ -217,9 +248,8 @@
         }
 
         lcd.refresh();
-        if (DirFlag) {
-
-            DirFlag = 0;
+        
+        if (joystick.direction != Centre) {
 
             bright = !bright;
         }
@@ -262,15 +292,14 @@
 
         //RevealMap(); //Uncomment for debugging to view map
 
-        while (1) {
+srand(Noise * 1000000);
 
-            srand(Noise * 1000000);
+PlayerCamera();
+
+        while (1) {
 
             ActFlag = 0;
             StartFlag = 0;
-            DirFlag = 0;
-
-            PlayerCamera();
 
             if (map[px][py] == CHEST) {
                 Chest();
@@ -290,9 +319,7 @@
             Sleep();
 
 
-            if (DirFlag) {
-
-                DirFlag = 0;
+            if (joystick.direction != Centre) {
 
                 PlayerMove();
 
@@ -300,6 +327,9 @@
                     if (ph < PH_MAX) {
                         ph++;
                     }
+                    
+                    PlayerCamera();
+                    
                 }
 
                 if (rand() % 50 == 0) {
@@ -425,7 +455,6 @@
     while (1) {
         ActFlag = 0;
         StartFlag = 0;
-        DirFlag = 0;
 
         lcd.clear();
 
@@ -449,8 +478,7 @@
         lcd.refresh();
         Sleep();
 
-        if (DirFlag) {
-            DirFlag = 0;
+        if (joystick.direction != Centre) {
             menu = !menu;
         }
         if (ActFlag) {
@@ -647,11 +675,11 @@
             Sleep();
         }
 
-        if (DirFlag) {
-            DirFlag = 0;
-            if ((Down || Right) && menu < 3) {
+        if (joystick.direction != Centre) {
+
+            if ((joystick.direction == Down || joystick.direction == Right) && menu < 3) {
                 menu++;
-            } else if ((Up || Left) && menu > 0)
+            } else if ((joystick.direction == Up || joystick.direction == Left) && menu > 0)
                 menu--;
         }
         if (ActFlag) {
@@ -681,7 +709,6 @@
     }
     StartFlag = 0;
     ActFlag = 0;
-    DirFlag = 0;
 }
 
 void DrawMap()
@@ -725,10 +752,6 @@
         if (ActFlag) {
             ActFlag = 0;
         }
-        if (DirFlag) {
-            DirFlag = 0;
-            break;
-        }
         if (StartFlag) {
             StartFlag = 0;
             break;
@@ -758,10 +781,6 @@
         if (ActFlag) {
             ActFlag = 0;
         }
-        if (DirFlag) {
-            DirFlag = 0;
-            break;
-        }
         if (StartFlag) {
             StartFlag = 0;
             break;
@@ -794,8 +813,6 @@
 
     int r = rand() % 10;
 
-    DirFlag = 0;
-
     lcd.clear();
     lcd.printString("Do you want to", 0, 1);
     lcd.printString("take the", 0, 2);
@@ -827,8 +844,7 @@
     } else {
 
         StartFlag = 0;
-        DirFlag = 0;
-
+        
         lcd.clear();
         lcd.printString("You leave the", 0, 1);
         lcd.printString(ItemList[r].ItemName, 0, 2);
@@ -971,7 +987,6 @@
             Sleep();
         }
     } else { //Leave the potion
-        DirFlag = 0;
         StartFlag = 0;
         lcd.clear();
         lcd.printString("You walk away", 0, 0);
@@ -1046,16 +1061,21 @@
 
 int main()
 {
+    calibrateJoystick();  // get centred values of joystick
+    pollJoystick.attach(&updateJoystick,1.0/10.0);  // read joystick 10 times per second
+
     //Power Saving
     PHY_PowerDown();
     int result = semihost_powerdown();
 
-    Up.rise(&DirPressed);
-    Down.rise(&DirPressed);
-    Right.rise(&DirPressed);
-    Left.rise(&DirPressed);
-    Start.rise(&StartPressed);
-    Act.rise(&ActPressed);
+    Start.mode(PullDown);
+    Act.mode(PullDown);
+
+    Start.fall(&StartPressed);
+    Act.fall(&ActPressed);
+
+    Start.mode(PullDown);
+    Act.mode(PullDown);
 
     //Generate random seed
     srand(Noise * 1000000);