Initial commit of the Kaypro1 scan module

- Does not output to usb yet
- USART is functionally getting characters from the keyboard and sending
  beep codes and ACK request code (Baud rate properly calculated)
- Uses hard-coded keys for the PC to Keyboard commands (not desireable)
- Keyboard sends ASCII data, which makes doing things like holding
  multiple keys almost impossible to detect (the board isn't NKRO
  anyways, though I've found 8+ key combos that work)

Scan/Kaypro1/scan_loop.h

@@ -0,0 +1,55 @@
+/* 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 0x4c // 76 - Size of the array space for the keyboardr(max index)
+
+
+
+// ----- Variables -----
+
+// NOTE: Highest Bit: Valid keypress (0x80 is valid keypress)
+//        Other Bits: Pressed state sample counter
+extern              uint8_t KeyIndex_Array [KEYBOARD_SIZE + 1];
+       static const uint8_t KeyIndex_Size = KEYBOARD_SIZE;
+
+
+
+// ----- Functions -----
+
+void scan_setup( void );
+uint8_t scan_loop( void );
+
+#endif // __SCAN_LOOP_H
+