Initial MatrixARM implementation

- Cleaned up Macro and USB callback naming
- Added security jumper for automated reload (MCHCK based only)
- Added additional LED position

Scan/MatrixARM/matrix_scan.h

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+/* Copyright (C) 2014 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 __MATRIX_SCAN_H
+#define __MATRIX_SCAN_H
+
+// ----- Includes -----
+
+
+
+// ----- Enums -----
+
+// Freescale MK20s have GPIO ports A...E
+typedef enum Port {
+	Port_A = 0,
+	Port_B = 1,
+	Port_C = 2,
+	Port_D = 3,
+	Port_E = 4,
+} Port;
+
+// Each port has a possible 32 pins
+typedef enum Pin {
+	Pin_0  = 0,
+	Pin_1  = 1,
+	Pin_2  = 2,
+	Pin_3  = 3,
+	Pin_4  = 4,
+	Pin_5  = 5,
+	Pin_6  = 6,
+	Pin_7  = 7,
+	Pin_8  = 8,
+	Pin_9  = 9,
+	Pin_10 = 10,
+	Pin_11 = 11,
+	Pin_12 = 12,
+	Pin_13 = 13,
+	Pin_14 = 14,
+	Pin_15 = 15,
+	Pin_16 = 16,
+	Pin_17 = 17,
+	Pin_18 = 18,
+	Pin_19 = 19,
+	Pin_20 = 20,
+	Pin_21 = 21,
+	Pin_22 = 22,
+	Pin_23 = 23,
+	Pin_24 = 24,
+	Pin_25 = 25,
+	Pin_26 = 26,
+	Pin_27 = 27,
+	Pin_28 = 28,
+	Pin_29 = 29,
+	Pin_30 = 30,
+	Pin_31 = 31,
+} Pin;
+
+// Type of pin
+typedef enum Type {
+	Type_StrobeOn,
+	Type_StrobeOff,
+	Type_StrobeSetup,
+	Type_Sense,
+	Type_SenseSetup,
+} Type;
+
+// Sense/Strobe configuration
+typedef enum Config {
+	Config_Pullup,    // Internal pull-up
+	Config_Pulldown,  // Internal pull-down
+	Config_Opendrain, // External pull resistor
+} Config;
+
+// Keypress States
+typedef enum KeyPosition {
+	KeyState_Off     = 0,
+	KeyState_Press   = 1,
+	KeyState_Hold    = 2,
+	KeyState_Release = 3,
+	KeyState_Invalid,
+} KeyPosition;
+
+
+
+// ----- Structs -----
+
+// Struct container for defining Rows (Sense) and Columns (Strobes)
+typedef struct GPIO_Pin {
+	Port port;
+	Pin  pin;
+} GPIO_Pin;
+
+// Debounce Element
+typedef struct KeyState {
+	KeyPosition prevState;
+	KeyPosition curState;
+	uint8_t activeCount;
+	uint8_t inactiveCount;
+} KeyState;
+
+
+
+// ----- Functions -----
+
+void Matrix_setup();
+void Matrix_scan( uint16_t scanNum, uint8_t firstScan );
+
+
+#endif // __MATRIX_SCAN_H
+