reassign internal keycode numbers

teensy3/keylayouts.c

 #ifdef M
 #undef M
 #endif
-#define M(n) ((n) & 0x3FFF)
+#define M(n) ((n) & KEYCODE_MASK)
 
 const KEYCODE_TYPE keycodes_ascii[] = {
         M(ASCII_20), M(ASCII_21), M(ASCII_22), M(ASCII_23),

teensy3/keylayouts.h

 // http://en.wikipedia.org/wiki/Keyboard_layout
 
 
-#define MODIFIERKEY_CTRL        ( 0x01 | 0x8000 )
-#define MODIFIERKEY_SHIFT       ( 0x02 | 0x8000 )
-#define MODIFIERKEY_ALT         ( 0x04 | 0x8000 )
-#define MODIFIERKEY_GUI         ( 0x08 | 0x8000 )
-#define MODIFIERKEY_LEFT_CTRL   ( 0x01 | 0x8000 )
-#define MODIFIERKEY_LEFT_SHIFT  ( 0x02 | 0x8000 )
-#define MODIFIERKEY_LEFT_ALT    ( 0x04 | 0x8000 )
-#define MODIFIERKEY_LEFT_GUI    ( 0x08 | 0x8000 )
-#define MODIFIERKEY_RIGHT_CTRL  ( 0x10 | 0x8000 )
-#define MODIFIERKEY_RIGHT_SHIFT ( 0x20 | 0x8000 )
-#define MODIFIERKEY_RIGHT_ALT   ( 0x40 | 0x8000 )
-#define MODIFIERKEY_RIGHT_GUI   ( 0x80 | 0x8000 )
-
-#define KEY_MEDIA_VOLUME_INC    0x01
-#define KEY_MEDIA_VOLUME_DEC    0x02
-#define KEY_MEDIA_MUTE          0x04
-#define KEY_MEDIA_PLAY_PAUSE    0x08
-#define KEY_MEDIA_NEXT_TRACK    0x10
-#define KEY_MEDIA_PREV_TRACK    0x20
-#define KEY_MEDIA_STOP          0x40
-#define KEY_MEDIA_EJECT         0x80
-
-#define KEY_A           ( 4   | 0x4000 )
-#define KEY_B           ( 5   | 0x4000 )
-#define KEY_C           ( 6   | 0x4000 )
-#define KEY_D           ( 7   | 0x4000 )
-#define KEY_E           ( 8   | 0x4000 )
-#define KEY_F           ( 9   | 0x4000 )
-#define KEY_G           ( 10  | 0x4000 )
-#define KEY_H           ( 11  | 0x4000 )
-#define KEY_I           ( 12  | 0x4000 )
-#define KEY_J           ( 13  | 0x4000 )
-#define KEY_K           ( 14  | 0x4000 )
-#define KEY_L           ( 15  | 0x4000 )
-#define KEY_M           ( 16  | 0x4000 )
-#define KEY_N           ( 17  | 0x4000 )
-#define KEY_O           ( 18  | 0x4000 )
-#define KEY_P           ( 19  | 0x4000 )
-#define KEY_Q           ( 20  | 0x4000 )
-#define KEY_R           ( 21  | 0x4000 )
-#define KEY_S           ( 22  | 0x4000 )
-#define KEY_T           ( 23  | 0x4000 )
-#define KEY_U           ( 24  | 0x4000 )
-#define KEY_V           ( 25  | 0x4000 )
-#define KEY_W           ( 26  | 0x4000 )
-#define KEY_X           ( 27  | 0x4000 )
-#define KEY_Y           ( 28  | 0x4000 )
-#define KEY_Z           ( 29  | 0x4000 )
-#define KEY_1           ( 30  | 0x4000 )
-#define KEY_2           ( 31  | 0x4000 )
-#define KEY_3           ( 32  | 0x4000 )
-#define KEY_4           ( 33  | 0x4000 )
-#define KEY_5           ( 34  | 0x4000 )
-#define KEY_6           ( 35  | 0x4000 )
-#define KEY_7           ( 36  | 0x4000 )
-#define KEY_8           ( 37  | 0x4000 )
-#define KEY_9           ( 38  | 0x4000 )
-#define KEY_0           ( 39  | 0x4000 )
-#define KEY_ENTER       ( 40  | 0x4000 )
-#define KEY_ESC         ( 41  | 0x4000 )
-#define KEY_BACKSPACE   ( 42  | 0x4000 )
-#define KEY_TAB         ( 43  | 0x4000 )
-#define KEY_SPACE       ( 44  | 0x4000 )
-#define KEY_MINUS       ( 45  | 0x4000 )
-#define KEY_EQUAL       ( 46  | 0x4000 )
-#define KEY_LEFT_BRACE  ( 47  | 0x4000 )
-#define KEY_RIGHT_BRACE ( 48  | 0x4000 )
-#define KEY_BACKSLASH   ( 49  | 0x4000 )
-#define KEY_NON_US_NUM  ( 50  | 0x4000 )
-#define KEY_SEMICOLON   ( 51  | 0x4000 )
-#define KEY_QUOTE       ( 52  | 0x4000 )
-#define KEY_TILDE       ( 53  | 0x4000 )
-#define KEY_COMMA       ( 54  | 0x4000 )
-#define KEY_PERIOD      ( 55  | 0x4000 )
-#define KEY_SLASH       ( 56  | 0x4000 )
-#define KEY_CAPS_LOCK   ( 57  | 0x4000 )
-#define KEY_F1          ( 58  | 0x4000 )
-#define KEY_F2          ( 59  | 0x4000 )
-#define KEY_F3          ( 60  | 0x4000 )
-#define KEY_F4          ( 61  | 0x4000 )
-#define KEY_F5          ( 62  | 0x4000 )
-#define KEY_F6          ( 63  | 0x4000 )
-#define KEY_F7          ( 64  | 0x4000 )
-#define KEY_F8          ( 65  | 0x4000 )
-#define KEY_F9          ( 66  | 0x4000 )
-#define KEY_F10         ( 67  | 0x4000 )
-#define KEY_F11         ( 68  | 0x4000 )
-#define KEY_F12         ( 69  | 0x4000 )
-#define KEY_PRINTSCREEN ( 70  | 0x4000 )
-#define KEY_SCROLL_LOCK ( 71  | 0x4000 )
-#define KEY_PAUSE       ( 72  | 0x4000 )
-#define KEY_INSERT      ( 73  | 0x4000 )
-#define KEY_HOME        ( 74  | 0x4000 )
-#define KEY_PAGE_UP     ( 75  | 0x4000 )
-#define KEY_DELETE      ( 76  | 0x4000 )
-#define KEY_END         ( 77  | 0x4000 )
-#define KEY_PAGE_DOWN   ( 78  | 0x4000 )
-#define KEY_RIGHT       ( 79  | 0x4000 )
-#define KEY_LEFT        ( 80  | 0x4000 )
-#define KEY_DOWN        ( 81  | 0x4000 )
-#define KEY_UP          ( 82  | 0x4000 )
-#define KEY_NUM_LOCK    ( 83  | 0x4000 )
-#define KEYPAD_SLASH    ( 84  | 0x4000 )
-#define KEYPAD_ASTERIX  ( 85  | 0x4000 )
-#define KEYPAD_MINUS    ( 86  | 0x4000 )
-#define KEYPAD_PLUS     ( 87  | 0x4000 )
-#define KEYPAD_ENTER    ( 88  | 0x4000 )
-#define KEYPAD_1        ( 89  | 0x4000 )
-#define KEYPAD_2        ( 90  | 0x4000 )
-#define KEYPAD_3        ( 91  | 0x4000 )
-#define KEYPAD_4        ( 92  | 0x4000 )
-#define KEYPAD_5        ( 93  | 0x4000 )
-#define KEYPAD_6        ( 94  | 0x4000 )
-#define KEYPAD_7        ( 95  | 0x4000 )
-#define KEYPAD_8        ( 96  | 0x4000 )
-#define KEYPAD_9        ( 97  | 0x4000 )
-#define KEYPAD_0        ( 98  | 0x4000 )
-#define KEYPAD_PERIOD   ( 99  | 0x4000 )
-#define KEY_MENU	( 101 | 0x4000 )
-#define KEY_F13         ( 104 | 0x4000 )
-#define KEY_F14         ( 105 | 0x4000 )
-#define KEY_F15         ( 106 | 0x4000 )
-#define KEY_F16         ( 107 | 0x4000 )
-#define KEY_F17         ( 108 | 0x4000 )
-#define KEY_F18         ( 109 | 0x4000 )
-#define KEY_F19         ( 110 | 0x4000 )
-#define KEY_F20         ( 111 | 0x4000 )
-#define KEY_F21         ( 112 | 0x4000 )
-#define KEY_F22         ( 113 | 0x4000 )
-#define KEY_F23         ( 114 | 0x4000 )
-#define KEY_F24         ( 115 | 0x4000 )
-
+#define MODIFIERKEY_CTRL        ( 0x01 | 0xE000 )
+#define MODIFIERKEY_SHIFT       ( 0x02 | 0xE000 )
+#define MODIFIERKEY_ALT         ( 0x04 | 0xE000 )
+#define MODIFIERKEY_GUI         ( 0x08 | 0xE000 )
+#define MODIFIERKEY_LEFT_CTRL   ( 0x01 | 0xE000 )
+#define MODIFIERKEY_LEFT_SHIFT  ( 0x02 | 0xE000 )
+#define MODIFIERKEY_LEFT_ALT    ( 0x04 | 0xE000 )
+#define MODIFIERKEY_LEFT_GUI    ( 0x08 | 0xE000 )
+#define MODIFIERKEY_RIGHT_CTRL  ( 0x10 | 0xE000 )
+#define MODIFIERKEY_RIGHT_SHIFT ( 0x20 | 0xE000 )
+#define MODIFIERKEY_RIGHT_ALT   ( 0x40 | 0xE000 )
+#define MODIFIERKEY_RIGHT_GUI   ( 0x80 | 0xE000 )
+
+#define KEY_SYSTEM_POWER_DOWN   ( 0x81 | 0xE200 )
+#define KEY_SYSTEM_SLEEP        ( 0x82 | 0xE200 )
+#define KEY_SYSTEM_WAKE_UP      ( 0x83 | 0xE200 )
+
+#define KEY_MEDIA_PLAY          ( 0xB0 | 0xE400 )
+#define KEY_MEDIA_PAUSE         ( 0xB1 | 0xE400 )
+#define KEY_MEDIA_RECORD        ( 0xB2 | 0xE400 )
+#define KEY_MEDIA_FAST_FORWARD  ( 0xB3 | 0xE400 )
+#define KEY_MEDIA_REWIND        ( 0xB4 | 0xE400 )
+#define KEY_MEDIA_NEXT_TRACK    ( 0xB5 | 0xE400 )
+#define KEY_MEDIA_PREV_TRACK    ( 0xB6 | 0xE400 )
+#define KEY_MEDIA_STOP          ( 0xB7 | 0xE400 )
+#define KEY_MEDIA_EJECT         ( 0xB8 | 0xE400 )
+#define KEY_MEDIA_RANDOM_PLAY   ( 0xB0 | 0xE400 )
+#define KEY_MEDIA_PLAY_PAUSE    ( 0xCD | 0xE400 )
+#define KEY_MEDIA_PLAY_SKIP     ( 0xCE | 0xE400 )
+#define KEY_MEDIA_MUTE          ( 0xE2 | 0xE400 )
+#define KEY_MEDIA_VOLUME_INC    ( 0xE9 | 0xE400 )
+#define KEY_MEDIA_VOLUME_DEC    ( 0xEA | 0xE400 )
+
+#define KEY_A                   (   4  | 0xF000 )
+#define KEY_B                   (   5  | 0xF000 )
+#define KEY_C                   (   6  | 0xF000 )
+#define KEY_D                   (   7  | 0xF000 )
+#define KEY_E                   (   8  | 0xF000 )
+#define KEY_F                   (   9  | 0xF000 )
+#define KEY_G                   (  10  | 0xF000 )
+#define KEY_H                   (  11  | 0xF000 )
+#define KEY_I                   (  12  | 0xF000 )
+#define KEY_J                   (  13  | 0xF000 )
+#define KEY_K                   (  14  | 0xF000 )
+#define KEY_L                   (  15  | 0xF000 )
+#define KEY_M                   (  16  | 0xF000 )
+#define KEY_N                   (  17  | 0xF000 )
+#define KEY_O                   (  18  | 0xF000 )
+#define KEY_P                   (  19  | 0xF000 )
+#define KEY_Q                   (  20  | 0xF000 )
+#define KEY_R                   (  21  | 0xF000 )
+#define KEY_S                   (  22  | 0xF000 )
+#define KEY_T                   (  23  | 0xF000 )
+#define KEY_U                   (  24  | 0xF000 )
+#define KEY_V                   (  25  | 0xF000 )
+#define KEY_W                   (  26  | 0xF000 )
+#define KEY_X                   (  27  | 0xF000 )
+#define KEY_Y                   (  28  | 0xF000 )
+#define KEY_Z                   (  29  | 0xF000 )
+#define KEY_1                   (  30  | 0xF000 )
+#define KEY_2                   (  31  | 0xF000 )
+#define KEY_3                   (  32  | 0xF000 )
+#define KEY_4                   (  33  | 0xF000 )
+#define KEY_5                   (  34  | 0xF000 )
+#define KEY_6                   (  35  | 0xF000 )
+#define KEY_7                   (  36  | 0xF000 )
+#define KEY_8                   (  37  | 0xF000 )
+#define KEY_9                   (  38  | 0xF000 )
+#define KEY_0                   (  39  | 0xF000 )
+#define KEY_ENTER               (  40  | 0xF000 )
+#define KEY_ESC                 (  41  | 0xF000 )
+#define KEY_BACKSPACE           (  42  | 0xF000 )
+#define KEY_TAB                 (  43  | 0xF000 )
+#define KEY_SPACE               (  44  | 0xF000 )
+#define KEY_MINUS               (  45  | 0xF000 )
+#define KEY_EQUAL               (  46  | 0xF000 )
+#define KEY_LEFT_BRACE          (  47  | 0xF000 )
+#define KEY_RIGHT_BRACE         (  48  | 0xF000 )
+#define KEY_BACKSLASH           (  49  | 0xF000 )
+#define KEY_NON_US_NUM          (  50  | 0xF000 )
+#define KEY_SEMICOLON           (  51  | 0xF000 )
+#define KEY_QUOTE               (  52  | 0xF000 )
+#define KEY_TILDE               (  53  | 0xF000 )
+#define KEY_COMMA               (  54  | 0xF000 )
+#define KEY_PERIOD              (  55  | 0xF000 )
+#define KEY_SLASH               (  56  | 0xF000 )
+#define KEY_CAPS_LOCK           (  57  | 0xF000 )
+#define KEY_F1                  (  58  | 0xF000 )
+#define KEY_F2                  (  59  | 0xF000 )
+#define KEY_F3                  (  60  | 0xF000 )
+#define KEY_F4                  (  61  | 0xF000 )
+#define KEY_F5                  (  62  | 0xF000 )
+#define KEY_F6                  (  63  | 0xF000 )
+#define KEY_F7                  (  64  | 0xF000 )
+#define KEY_F8                  (  65  | 0xF000 )
+#define KEY_F9                  (  66  | 0xF000 )
+#define KEY_F10                 (  67  | 0xF000 )
+#define KEY_F11                 (  68  | 0xF000 )
+#define KEY_F12                 (  69  | 0xF000 )
+#define KEY_PRINTSCREEN         (  70  | 0xF000 )
+#define KEY_SCROLL_LOCK         (  71  | 0xF000 )
+#define KEY_PAUSE               (  72  | 0xF000 )
+#define KEY_INSERT              (  73  | 0xF000 )
+#define KEY_HOME                (  74  | 0xF000 )
+#define KEY_PAGE_UP             (  75  | 0xF000 )
+#define KEY_DELETE              (  76  | 0xF000 )
+#define KEY_END                 (  77  | 0xF000 )
+#define KEY_PAGE_DOWN           (  78  | 0xF000 )
+#define KEY_RIGHT               (  79  | 0xF000 )
+#define KEY_LEFT                (  80  | 0xF000 )
+#define KEY_DOWN                (  81  | 0xF000 )
+#define KEY_UP                  (  82  | 0xF000 )
+#define KEY_NUM_LOCK            (  83  | 0xF000 )
+#define KEYPAD_SLASH            (  84  | 0xF000 )
+#define KEYPAD_ASTERIX          (  85  | 0xF000 )
+#define KEYPAD_MINUS            (  86  | 0xF000 )
+#define KEYPAD_PLUS             (  87  | 0xF000 )
+#define KEYPAD_ENTER            (  88  | 0xF000 )
+#define KEYPAD_1                (  89  | 0xF000 )
+#define KEYPAD_2                (  90  | 0xF000 )
+#define KEYPAD_3                (  91  | 0xF000 )
+#define KEYPAD_4                (  92  | 0xF000 )
+#define KEYPAD_5                (  93  | 0xF000 )
+#define KEYPAD_6                (  94  | 0xF000 )
+#define KEYPAD_7                (  95  | 0xF000 )
+#define KEYPAD_8                (  96  | 0xF000 )
+#define KEYPAD_9                (  97  | 0xF000 )
+#define KEYPAD_0                (  98  | 0xF000 )
+#define KEYPAD_PERIOD           (  99  | 0xF000 )
+#define KEY_MENU        	( 101  | 0xF000 )
+#define KEY_F13                 ( 104  | 0xF000 )
+#define KEY_F14                 ( 105  | 0xF000 )
+#define KEY_F15                 ( 106  | 0xF000 )
+#define KEY_F16                 ( 107  | 0xF000 )
+#define KEY_F17                 ( 108  | 0xF000 )
+#define KEY_F18                 ( 109  | 0xF000 )
+#define KEY_F19                 ( 110  | 0xF000 )
+#define KEY_F20                 ( 111  | 0xF000 )
+#define KEY_F21                 ( 112  | 0xF000 )
+#define KEY_F22                 ( 113  | 0xF000 )
+#define KEY_F23                 ( 114  | 0xF000 )
+#define KEY_F24                 ( 115  | 0xF000 )
 
 // for compatibility with Leonardo's slightly different names
 #define KEY_UP_ARROW	KEY_UP
 
 #define SHIFT_MASK		0x40
 #define KEYCODE_TYPE		uint8_t
+#define KEYCODE_MASK		0x007F
 
 #define ASCII_20	KEY_SPACE				// 32  
 #define ASCII_21	KEY_1 + SHIFT_MASK			// 33 !
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_6 + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_QUOTE
 #define DEADKEY_GRAVE_ACCENT	KEY_TILDE
 #define ACUTE_ACCENT_BITS	0x0400
 #define GRAVE_ACCENT_BITS	0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_TILDE
 #define DEADKEY_ACUTE_ACCENT	KEY_EQUAL
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define	DIAERESIS_BITS		0x0400
 #define	TILDE_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_ACUTE_ACCENT	KEY_EQUAL
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define DEADKEY_CIRCUMFLEX	KEY_6 + SHIFT_MASK + ALTGR_MASK
 #define CEDILLA_BITS		0x0500
 
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_LEFT_BRACE
 #define DEADKEY_ACUTE_ACCENT	KEY_SLASH + ALTGR_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_QUOTE
 #define TILDE_BITS		0x0600
 #define RING_ABOVE_BITS	 	0x0700
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x0FFF
 #define DEADKEY_CIRCUMFLEX	KEY_LEFT_BRACE
 #define DEADKEY_DIAERESIS	KEY_LEFT_BRACE + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_SEMICOLON + RCTRL_MASK
 #define SHIFT_MASK		0x0040
 #define ALTGR_MASK		0x0080
 #define KEYCODE_TYPE		uint8_t
+#define KEYCODE_MASK		0x00FF
 #define KEY_NON_US_100		63
 
 #define ASCII_20	KEY_SPACE				// 32  
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_RIGHT_BRACE + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_EQUAL
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define DIAERESIS_BITS		0x0300
 #define TILDE_BITS		0x0400
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_LEFT_BRACE
 #define DEADKEY_GRAVE_ACCENT	KEY_7 + ALTGR_MASK
 #define DEADKEY_DIAERESIS	KEY_LEFT_BRACE + SHIFT_MASK
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_RIGHT_BRACE + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_EQUAL
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_RIGHT_BRACE + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_EQUAL + ALTGR_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_RIGHT_BRACE + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_EQUAL
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_LEFT_BRACE + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_QUOTE
 #define DEADKEY_GRAVE_ACCENT	KEY_LEFT_BRACE
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_BACKSLASH
 #define DEADKEY_ACUTE_ACCENT	KEY_RIGHT_BRACE + SHIFT_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_RIGHT_BRACE + SHIFT_MASK
 #define SHIFT_MASK		0x40
 #define ALTGR_MASK		0x80
 #define KEYCODE_TYPE		uint8_t
+#define KEYCODE_MASK		0x00FF
 #define KEY_NON_US_100		63
 
 #define ASCII_20	KEY_SPACE				// 32  
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_QUOTE + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_LEFT_BRACE
 #define DEADKEY_GRAVE_ACCENT	KEY_LEFT_BRACE + SHIFT_MASK
 #define TILDE_BITS		0x0400
 #define ACUTE_ACCENT_BITS	0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_LEFT_BRACE
 #define DEADKEY_ACUTE_ACCENT	KEY_QUOTE + ALTGR_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_BACKSLASH + ALTGR_MASK
 #define TILDE_BITS		0x0400
 #define ACUTE_ACCENT_BITS	0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_EQUAL
 #define DEADKEY_ACUTE_ACCENT	KEY_MINUS + ALTGR_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define TILDE_BITS		0x0400
 #define ACUTE_ACCENT_BITS	0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_EQUAL
 #define DEADKEY_ACUTE_ACCENT	KEY_MINUS + ALTGR_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_EQUAL + SHIFT_MASK
 #define GRAVE_ACCENT_BITS	0x0300
 #define DIAERESIS_BITS		0x0400
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_QUOTE + ALTGR_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_LEFT_BRACE
 #define DEADKEY_GRAVE_ACCENT	KEY_BACKSLASH + ALTGR_MASK
 #define GRAVE_ACCENT_BITS	0x0100
 #define ACUTE_ACCENT_BITS	0x0200
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x03FF
 #define DEADKEY_ACUTE_ACCENT	KEY_QUOTE + ALTGR_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_TILDE
 #define KEY_NON_US_100		63
 #define DIAERESIS_BITS		0x0400
 #define RING_ABOVE_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_QUOTE + ALTGR_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_QUOTE
 #define DEADKEY_GRAVE_ACCENT	KEY_BACKSLASH + ALTGR_MASK
 #define TILDE_BITS		0x0400
 #define DIAERESIS_BITS		0x0500
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x07FF
 #define DEADKEY_CIRCUMFLEX	KEY_3 + SHIFT_MASK
 #define DEADKEY_ACUTE_ACCENT	KEY_SEMICOLON + ALTGR_MASK
 #define DEADKEY_GRAVE_ACCENT	KEY_BACKSLASH + ALTGR_MASK
 //#define DIAERESIS_BITS	0x0A00
 #define CEDILLA_BITS		0x0B00
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x0FFF
 #define DEADKEY_ACUTE_ACCENT	KEY_EQUAL  // TODO: is it KEY_9 + ALTGR_MASK
 #define DEADKEY_DEGREE_SIGN	KEY_TILDE + SHIFT_MASK // TODO: is it KEY_5 + ALTGR_MASK
 #define DEADKEY_CARON		KEY_EQUAL + SHIFT_MASK // TODO: is it KEY_2 + ALTGR_MASK
 #define DOUBLE_ACUTE_BITS	0x0900
 #define DIAERESIS_BITS		0x0A00
 #define KEYCODE_TYPE		uint16_t
+#define KEYCODE_MASK		0x0FFF
 #define DEADKEY_CEDILLA		KEY_TILDE
 #define DEADKEY_CARON		KEY_2 + ALTGR_MASK
 #define DEADKEY_CIRCUMFLEX	KEY_3 + ALTGR_MASK

teensy3/usb_keyboard.c

 	// Unicode code points beyond U+FFFF are not supported
 	// technically this input should probably be called UCS-2
 	if (cpoint < 32) {
-		if (cpoint == 10) return KEY_ENTER & 0x3FFF;
-		if (cpoint == 11) return KEY_TAB & 0x3FFF;
+		if (cpoint == 10) return KEY_ENTER & KEYCODE_MASK;
+		if (cpoint == 11) return KEY_TAB & KEYCODE_MASK;
 		return 0;
 	}
 	if (cpoint < 128) {
 }
 
 
+// Input can be:
+//     32 - 127     ASCII direct (U+0020 to U+007F) <-- uses layout
+//    128 - 0xC1FF  Unicode direct (U+0080 to U+C1FF) <-- uses layout
+// 0xC200 - 0xDFFF  Unicode UTF8 packed (U+0080 to U+07FF) <-- uses layout
+// 0xE000 - 0xE0FF  Modifier key (bitmap, 8 keys, shift/ctrl/alt/gui)
+// 0xE200 - 0xE2FF  System key (HID usage code, within usage page 1)
+// 0xE400 - 0xE7FF  Media/Consumer key (HID usage code, within usage page 12)
+// 0xF000 - 0xFFFF  Normal key (HID usage code, within usage page 7)
 
 void usb_keyboard_press_keycode(uint16_t n)
 {
 	#endif
 
 	msb = n >> 8;
-	if (msb >= 0xC2 && msb <= 0xDF) {
-		n = (n & 0x3F) | ((uint16_t)(msb & 0x1F) << 6);
-	} else
-	if (msb == 0x80) {
-		usb_keyboard_press_key(0, n);
-		return;
-	} else
-	if (msb == 0x40) {
-		usb_keyboard_press_key(n, 0);
-		return;
+
+	if (msb >= 0xC2) {
+		if (msb <= 0xDF) {
+			n = (n & 0x3F) | ((uint16_t)(msb & 0x1F) << 6);
+		} else if (msb == 0xF0) {
+			usb_keyboard_press_key(n, 0);
+			return;
+		} else if (msb == 0xE0) {
+			usb_keyboard_press_key(0, n);
+			return;
+#ifdef KEYMEDIA_INTERFACE
+		} else if (msb == 0xE2) {
+			// TODO: system keys
+			return;
+		} else if (msb >= 0xE4 && msb <= 0xE7) {
+			// TODO: media/consumer keys
+			return;
+#endif
+		} else {
+			return;
+		}
 	}
 	keycode = unicode_to_keycode(n);
 	if (!keycode) return;
 	uint8_t key, mod, msb;
 
 	msb = n >> 8;
-	if (msb >= 0xC2 && msb <= 0xDF) {
-		n = (n & 0x3F) | ((uint16_t)(msb & 0x1F) << 6);
-	} else
-	if (msb == 0x80) {
-		usb_keyboard_release_key(0, n);
-		return;
-	} else
-	if (msb == 0x40) {
-		usb_keyboard_release_key(n, 0);
-		return;
+	if (msb >= 0xC2) {
+		if (msb <= 0xDF) {
+			n = (n & 0x3F) | ((uint16_t)(msb & 0x1F) << 6);
+		} else if (msb == 0xF0) {
+			usb_keyboard_release_key(n, 0);
+			return;
+		} else if (msb == 0xE0) {
+			usb_keyboard_release_key(0, n);
+			return;
+#ifdef KEYMEDIA_INTERFACE
+		} else if (msb == 0xE2) {
+			// TODO: system keys
+			return;
+		} else if (msb >= 0xE4 && msb <= 0xE7) {
+			// TODO: media/consumer keys
+			return;
+#endif
+		} else {
+			return;
+		}
 	}
 	KEYCODE_TYPE keycode = unicode_to_keycode(n);
 	if (!keycode) return;