2 * keyboard firmware based on PJRC USB keyboard example
4 /* Keyboard example with debug channel, for Teensy USB Development Board
5 * http://www.pjrc.com/teensy/usb_keyboard.html
6 * Copyright (c) 2008 PJRC.COM, LLC
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 // TODO: clean unused headers
30 #include <avr/pgmspace.h>
31 #include <avr/interrupt.h>
32 #include <util/delay.h>
34 #include "usb_keyboard.h"
35 #include "usb_mouse.h"
37 #include "matrix_skel.h"
39 #include "jump_bootloader.h"
41 #include "key_process.h"
43 #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
45 // TODO: should go to hardware dependent file
46 // for Teensy/Teensy++ 2.0
47 #define LED_CONFIG (DDRD |= (1<<6))
48 #define LED_ON (PORTD |= (1<<6))
49 #define LED_OFF (PORTD &= ~(1<<6))
52 uint16_t idle_count=0;
57 // set for 16 MHz clock
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 // Configure timer 0 to generate a timer overflow interrupt every
67 // 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
68 // This demonstrates how to use interrupts to implement a simple
69 // inactivity timeout.
77 // debug on when 4 keys are pressed
78 if (matrix_key_count() == 4) print_enable = true;
80 /* wait for debug pipe to print greetings. */
82 for (int i =0; i < 6; i++) {
90 print("\nt.m.k. keyboard 1.2\n");
98 // This interrupt routine is run approx 61 times per second.
99 // A very simple inactivity timeout is implemented, where we
100 // will send a space character and print a message to the
101 // hid_listen debug message window.