ADK barcode scanner interface example added

examples/adk/adk_barcode/adk_barcode.pde

@@ -0,0 +1,91 @@
+/**/
+/* A sketch demonstrating data exchange between two USB devices - a HID barcode scanner and ADK-compatible Android phone */
+/**/
+#include <avrpins.h>
+#include <max3421e.h>
+#include <usbhost.h>
+#include <usb_ch9.h>
+#include <Usb.h>
+#include <usbhub.h>
+#include <avr/pgmspace.h>
+#include <address.h>
+
+#include <adk.h>
+
+#include <hidboot.h>
+
+USB Usb;
+USBHub Hub1(&Usb);
+USBHub Hub2(&Usb);     
+HIDBoot<HID_PROTOCOL_KEYBOARD> Keyboard(&Usb);
+
+ADK adk(&Usb,"Circuits@Home, ltd.",
+            "USB Host Shield",
+            "Arduino Terminal for Android",
+            "1.0",
+            "http://www.circuitsathome.com",
+            "0000000000000001");
+
+
+class KbdRptParser : public KeyboardReportParser
+{
+ 
+protected:
+	virtual void OnKeyDown	(uint8_t mod, uint8_t key);
+	virtual void OnKeyPressed(uint8_t key);
+};
+ 
+void KbdRptParser::OnKeyDown(uint8_t mod, uint8_t key)	
+{
+    uint8_t c = OemToAscii(mod, key);
+ 
+    if (c)
+        OnKeyPressed(c);
+}
+ 
+/* what to do when symbol arrives */
+void KbdRptParser::OnKeyPressed(uint8_t key)	
+{
+const char* new_line = "\n";
+uint8_t rcode;
+uint8_t keylcl;
+
+ if( adk.isReady() == false ) {
+   return;
+ }
+  
+  keylcl = key;
+ 
+  if( keylcl == 0x13 ) {
+    rcode = adk.SndData( strlen( new_line ), (uint8_t *)new_line );
+  }
+  else {
+    rcode = adk.SndData( 1, &keylcl );
+  }    
+  
+  Serial.print( keylcl );
+  Serial.print(" : ");  
+  Serial.println( keylcl, HEX );
+};
+ 
+KbdRptParser Prs;
+ 
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("\r\nADK demo start");
+        
+  if (Usb.Init() == -1) {
+    Serial.println("OSCOKIRQ failed to assert");
+    while(1); //halt
+  }//if (Usb.Init() == -1...
+        
+  Keyboard.SetReportParser(0, (HIDReportParser*)&Prs);
+  
+  delay( 200 );
+}
+
+void loop()
+{
+  Usb.Task();
+}