Diff: PanelControls.h

Revision:

4:673eb9735d44

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PanelControls.h	Sat Jun 08 11:24:05 2013 +0000
@@ -0,0 +1,107 @@
+/*
+ * SOURCE FILE : PanelControls.h
+ *
+ * Responsible for reading joysticks and buttons.
+ * This is the version for mbed LPC1768.
+ * There is a version kicking around for the LPC11U24 that uses different inputs for joystick 2.
+ *
+ */
+
+#ifndef PanelControlsIncluded
+  
+  #define PanelControlsIncluded
+
+  #include "mbed.h"
+  #include "Types.h"
+  
+  class PanelControls {
+    
+  public :
+
+    /***************/
+    /* CONSTRUCTOR */
+    /***************/
+    PanelControls() :
+      inputs( 0 ),
+      bus( (BusIn*)NULL )
+    {
+    }
+    
+    /**************/
+    /* DESTRUCTOR */
+    /**************/
+    ~PanelControls() {
+      delete bus;
+    }
+    
+    /*************************/
+    /* INITIALISE INPUT PINS */
+    /*************************/
+    void InitialisePins( void ) {
+      // Create an input bus.
+      bus = new BusIn(
+        p23, p24, p25, p26, // joystick 1 up, down, left, right
+        p21, p22, p27, p28, // joystick 2 up, down, left, right
+        p29, p30            // button 1, button 2
+      );
+    }
+    
+    /*****************************/
+    /* READ ALL THE PANEL INPUTS */
+    /*****************************/
+    // Returns a bitmap of all the inputs.
+    void Read( void ) {
+      if( bus == (BusIn*)NULL ) {
+        inputs = 0;
+      }
+      else {
+        // Note that a closed contact registers as a zero
+        // which is why the bitwise not operator (~) is used.
+        inputs = ~*bus & 0x3FF;
+      }
+    }
+    
+    // Masks to use with GetInputs method.
+    enum Mask {
+      Up1 = 1,
+      Down1 = 2,
+      Left1 = 4,
+      Right1 = 8,
+      Up2 = 16,
+      Down2 = 32,
+      Left2 = 64,
+      Right2 = 128,
+      Button1 = 256,
+      Button2 = 512,
+    };
+    
+    // Bit numbers indicating where readings for each joystick start in the map.
+    // Can use these with right shift operator.
+    enum Bits {
+      Joy1 = 0,      // joystick 1 readings start at bit 0
+      Joy2 = 4,      // joystick 2 readings start at bit 4
+      Buttons = 8,   // button readings start at bit 8
+    };
+    
+    /***************************/
+    /* GET STATE OF THE INPUTS */
+    /***************************/
+    // Returns a bitmap of the state of the inputs
+    // last time Read was called.
+    UInt16 GetInputs( void ) {
+      return inputs;
+    }
+    
+  private :
+  
+    // Stored state of inputs.
+    UInt16 inputs;
+
+    // Input bus used to read inputs.
+    BusIn *bus;
+        
+  };
+    
+#endif
+
+/* END of PanelControls.h */