Adding support for the Micro Switch 8304 Hall Effect Keyboard

- Full support (NKRO, provided the USB module can handle it)
- Full LED support (available to the macro modules per input signals)
- Reset/Hold line support
- Handles repeat rate issues (keyboard does not send key updates as most
  keyboards do...)

Scan/MicroSwitch8304/scan_loop.h

@@ -0,0 +1,64 @@
+/* Copyright (C) 2011 by Jacob Alexander
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef __SCAN_LOOP_H
+#define __SCAN_LOOP_H
+
+// ----- Includes -----
+
+// Compiler Includes
+#include <stdint.h>
+
+// Local Includes
+
+
+
+// ----- Defines -----
+
+#define KEYBOARD_SIZE 0x62 // 76 - Size of the array space for the keyboard(max index)
+#define KEYBOARD_BUFFER 24 // Max number of key signals to buffer
+
+
+
+// ----- Variables -----
+
+extern volatile     uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
+extern volatile     uint8_t KeyIndex_BufferUsed;
+
+
+
+// ----- Functions -----
+
+// Functions used by main.c
+void scan_setup( void );
+uint8_t scan_loop( void );
+
+
+// Functions available to macro.c
+uint8_t scan_sendData( uint8_t dataPayload );
+
+void scan_finishedWithBuffer( void );
+void scan_lockKeyboard( void );
+void scan_unlockKeyboard( void );
+
+
+#endif // __SCAN_LOOP_H
+