Revision 3:478b090b7e1b, committed 2015-04-09

Comitter:

MBirney

Date:

Thu Apr 09 13:10:14 2015 +0000

Parent:

2:deb61a34ac31

Child:

4:551dea241d0a

Commit message:

Start Menu working (easy medium hard selectable) need to include start button to enter gameplay

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PinDetect.lib	Thu Apr 09 13:10:14 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/AjK/code/PinDetect/#cb3afc45028b

--- a/main.cpp	Wed Apr 08 20:00:37 2015 +0000
+++ b/main.cpp	Thu Apr 09 13:10:14 2015 +0000
@@ -1,20 +1,121 @@
 #include "mbed.h"
 #include "N5110.h"
 
+#include "PinDetect.h"
+
+// change this to alter tolerance of joystick direction
+#define DIRECTION_TOLERANCE 0.2
 //    VCC,SCE,RST,D/C,MOSI,SCLK,LED
 N5110 lcd(p7,p8,p9,p10,p11,p13,p21);
-//d
+DigitalOut led2(LED2);
+InterruptIn pb(p16);
+// connections for joystick
+DigitalIn button(p18);
+AnalogIn xPot(p19);
+AnalogIn yPot(p20);
+
+bool gamePlaying =0;
+
+// timer to regularly read the joystick
+Ticker pollJoystick;
+/*pin.mode( PullDown );
+    pin.attach_asserted( &keyPressed );
+    pin.attach_deasserted( &keyReleased );
+      pin.attach_asserted_held( &keyPressedHeld );
+      pin.attach_deasserted_held( &keyReleasedHeld );
+    pin.setSampleFrequency();*/
+
 
-// Can also power (VCC) directly from VOUT (3.3 V) -
-// Can give better performance due to current limitation from GPIO pin
+/*
+void keyPressed( void ) {
+joystick.direction =DOWN;
+led2 = 1;
+}
+
+void keyReleased( void ) {
+joystick.direction =UNKNOWN;
+led2 = 0;
+}
+
+void keyPressedHeld( void ) {
+led2 = 1;
+}
+
+void keyReleasedHeld( void) {
+}*/
+
+
 enum Difficulty {
     EASY,
     MEDIUM,
     HARD,
 };
+
 int gameSpeed;//change depending on difficulty selected
 
-Difficulty currentDifficulty =EASY;
+Difficulty currentDifficulty=EASY;
+
+
+// create enumerated type (0,1,2,3 etc. for direction)
+// could be extended for diagonals etc.
+enum DirectionName {
+    UP,
+    DOWN,
+    LEFT,
+    RIGHT,
+    CENTRE,
+    UNKNOWN
+};
+
+
+
+// struct for Joystick
+typedef struct JoyStick Joystick;
+struct JoyStick {
+    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
+};
+// create struct variable
+Joystick joystick;
+
+
+
+// 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 = LEFT; // remember switched this with right
+    } else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
+        joystick.direction = RIGHT;
+    } else {
+        joystick.direction = UNKNOWN;
+    }
+}
 
 void displaySplash()
 {
@@ -44,6 +145,7 @@
 
 void easySelected() // display when easy is selected
 {
+    currentDifficulty=EASY;
     lcd.clear();
     lcd.printString("Please Select",2,0);
     lcd.printString("Difficulty:",2,1);
@@ -59,6 +161,7 @@
 }
 void mediumSelected() // display when medium is selected
 {
+    currentDifficulty=MEDIUM;
     lcd.clear();
     lcd.printString("Please Select",2,0);
     lcd.printString("Difficulty:",2,1);
@@ -74,6 +177,7 @@
 
 void hardSelected() // display when hard is selected
 {
+    currentDifficulty=HARD;
     lcd.clear();
     lcd.printString("Please Select",2,0);
     lcd.printString("Difficulty:",2,1);
@@ -91,66 +195,76 @@
 
 int main()
 {
+
     // first need to initialise display
     lcd.init();
+    // pb.rise(&flip);
     displaySplash();
     wait(1);
-
     easySelected();
-    wait(2);
-    mediumSelected();
-    wait(2);
-    hardSelected();
-
-    while(1) {
+    joystick.direction=UNKNOWN;
+    calibrateJoystick();  // get centred values of joystick
+    pollJoystick.attach(&updateJoystick,1.0/5.0);  // read joystick 10 times per second
 
-        switch(currentDifficulty) {
-            case EASY:
 
-                switch (joystick.direction)
-
-                case UP:
-                hardSelected;
-                break;
+   
+        while(1) {
+            
+             if (gamePlaying==0) {
 
 
-            case DOWN:
-                mediumSelected;
-                break;
+            switch(currentDifficulty) {
+                case EASY:
 
-                break;
+                    switch (joystick.direction) {
+
+                        case UP:
+                            hardSelected();
+                            break;
 
 
-            case MEDIUM:
-
-                switch (joystick.direction)
-
-                case UP:
-                easySelected;
-                break;
+                        case DOWN:
+                            mediumSelected();
+                            break;
+                    }
+                    break;
 
 
-            case DOWN:
-                hardSelected;
-                break;
+                case MEDIUM:
+
+                    switch (joystick.direction) {
+
+                        case UP:
+                            easySelected();
+                            break;
+
+
+                        case DOWN:
+                            hardSelected();
+                            break;
+                    }
 
 
 
-                break;
-            case HARD:
-                switch (joystick.direction)
+                    break;
+                case HARD:
+                    switch (joystick.direction) {
 
-                case UP:
-                mediumSelected;
-                break;
+                        case UP:
+                            mediumSelected();
+                            break;
 
 
-            case DOWN:
-                easySelected;
-                break;
-                break;
+                        case DOWN:
+                            easySelected();
+                            break;
+                    }
+                    break;
+                    wait(0.1);
+            }
+
         }
 
+    }
 
-    }
 }
\ No newline at end of file