1 /* Copyright (C) 2011 by Jacob Alexander
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 // ----- Includes -----
25 #include <util/delay.h>
30 #include "usb_keyboard_debug.h"
37 // ----- Variables -----
39 // which modifier keys are currently pressed
40 // 1=left ctrl, 2=left shift, 4=left alt, 8=left gui
41 // 16=right ctrl, 32=right shift, 64=right alt, 128=right gui
42 uint8_t USBKeys_Modifiers = 0;
44 // which keys are currently pressed, up to 6 keys may be down at once
45 uint8_t USBKeys_Array[USB_MAX_KEY_SEND] = {0,0,0,0,0,0};
47 // The number of keys sent to the usb in the array
50 // 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
51 volatile uint8_t USBKeys_LEDs = 0;
55 // ----- Functions -----
60 // Initialize the USB, and then wait for the host to set configuration.
61 // If the Teensy is powered without a PC connected to the USB port,
62 // this will wait forever.
64 while ( !usb_configured() ) /* wait */ ;
66 // Wait an extra second for the PC's operating system to load drivers
67 // and do whatever it does to actually be ready for input
75 // TODO undo potentially old keys
76 for ( uint8_t c = USBKeys_Sent; c < USBKeys_MaxSize; c++ )
83 USBKeys_Modifiers = 0;