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
29 #include <avr/pgmspace.h>
30 #include <avr/interrupt.h>
31 #include <util/delay.h>
33 #include "usb_keyboard_debug.h"
38 #define LED_CONFIG (DDRD |= (1<<6))
39 #define LED_ON (PORTD &= ~(1<<6))
40 #define LED_OFF (PORTD |= (1<<6))
41 #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
44 uint16_t idle_count=0;
50 bool modified = false;
51 bool has_ghost = false;
52 uint8_t key_index = 0;
54 // 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 // 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
70 // Configure timer 0 to generate a timer overflow interrupt every
71 // 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
72 // This demonstrates how to use interrupts to implement a simple
73 // inactivity timeout.
78 print("keyboard firmware 0.1 for t.m.k.\n");
82 uint8_t row, col, code;
87 modified = matrix_is_modified();
88 has_ghost = matrix_has_ghost();
90 // doesnt send keys during ghost occurs
91 if (modified && !has_ghost) {
93 keyboard_modifier_keys = 0;
94 for (int i = 0; i < 6; i++) keyboard_keys[i] = KB_NO;
96 for (row = 0; row < MATRIX_ROWS; row++) {
97 for (col = 0; col < MATRIX_COLS; col++) {
98 if (matrix[row] & 1<<col) continue;
100 code = get_keycode(layer, row, col);
103 } else if (KB_LCTRL <= code && code <= KB_RGUI) {
104 // modifier keycode: 0xE0-0xE7
105 keyboard_modifier_keys |= 1<<(code & 0x07);
108 keyboard_keys[key_index] = code;
121 // variables shared with interrupt routines must be
122 // accessed carefully so the interrupt routine doesn't
123 // try to use the variable in the middle of our access
129 // print matrix state for debug
131 print("r/c 01234567\n");
132 for (row = 0; row < MATRIX_ROWS; row++) {
133 phex(row); print(": ");
134 pbin_reverse(matrix[row]);
135 if (matrix_has_ghost_in_row(row)) {
141 for (int i = 0; i < 6; i++) { phex(keyboard_keys[i]); print(" "); }
143 print("mod: "); phex(keyboard_modifier_keys); print("\n");
146 // now the current pins will be the previous, and
147 // wait a short delay so we're not highly sensitive
148 // to mechanical "bounce".
153 // This interrupt routine is run approx 61 times per second.
154 // A very simple inactivity timeout is implemented, where we
155 // will send a space character and print a message to the
156 // hid_listen debug message window.
160 if (idle_count > 61 * 8) {
162 //print("Timer Event :)\n");
163 //usb_keyboard_press(KEY_SPACE, 0);