mykey.c

   1 /* 2010/08/23 noname
   2  * keyboard firmware based on PJRC USB keyboard example
   3  */
   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
   7  *
   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:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  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
  24  * THE SOFTWARE.
  25  */
  26
  27 #include <stdbool.h>
  28 #include <avr/io.h>
  29 #include <avr/pgmspace.h>
  30 #include <avr/interrupt.h>
  31 #include <util/delay.h>
  32
  33 #include "usb_keyboard_debug.h"
  34 #include "print.h"
  35 #include "matrix.h"
  36 #include "keymap.h"
  37
  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))
  42
  43
  44 uint16_t idle_count=0;
  45
  46
  47
  48 int main(void)
  49 {
  50     bool modified = false;
  51     bool has_ghost = false;
  52     uint8_t key_index = 0;
  53
  54     // set for 16 MHz clock
  55     CPU_PRESCALE(0);
  56
  57     matrix_init();
  58
  59
  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.
  63     usb_init();
  64     while (!usb_configured()) /* wait */ ;
  65
  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
  68     _delay_ms(1000);
  69
  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.
  74     TCCR0A = 0x00;
  75     TCCR0B = 0x05;
  76     TIMSK0 = (1<<TOIE0);
  77
  78     print("keyboard firmware 0.1 for t.m.k.\n");
  79
  80     while (1) {
  81         int layer = 0;
  82         uint8_t row, col, code;
  83
  84         matrix_scan();
  85         layer = get_layer();
  86
  87         modified = matrix_is_modified();
  88         has_ghost = matrix_has_ghost();
  89
  90         // doesnt send keys during ghost occurs
  91         if (modified && !has_ghost) {
  92             key_index = 0;
  93             keyboard_modifier_keys = 0;
  94             for (int i = 0; i < 6; i++) keyboard_keys[i] = KB_NO;
  95
  96             for (row = 0; row < MATRIX_ROWS; row++) {
  97                 for (col = 0; col < MATRIX_COLS; col++) {
  98                     if (matrix[row] & 1<<col) continue;
  99
 100                     code = get_keycode(layer, row, col);
 101                     if (code == KB_NO) {
 102                         continue;
 103                     } else if (KB_LCTRL <= code && code <= KB_RGUI) {
 104                         // modifier keycode: 0xE0-0xE7
 105                         keyboard_modifier_keys |= 1<<(code & 0x07);
 106                     } else {
 107                         if (key_index < 6)
 108                             keyboard_keys[key_index] = code;
 109                         key_index++;
 110                     }
 111                 }
 112             }
 113
 114             if (key_index > 6) {
 115                 //Rollover
 116             }
 117
 118             usb_keyboard_send();
 119
 120
 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
 124             cli();
 125             idle_count = 0;
 126             sei();
 127         }
 128
 129         // print matrix state for debug
 130         if (modified) {
 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)) {
 136                     print(" <ghost");
 137                 }
 138                 print("\n");
 139             }
 140             print("keys: ");
 141             for (int i = 0; i < 6; i++) { phex(keyboard_keys[i]); print(" "); }
 142             print("\n");
 143             print("mod: "); phex(keyboard_modifier_keys); print("\n");
 144         }
 145
 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".
 149         _delay_ms(2);
 150     }
 151 }
 152
 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.
 157 ISR(TIMER0_OVF_vect)
 158 {
 159     idle_count++;
 160     if (idle_count > 61 * 8) {
 161         idle_count = 0;
 162         //print("Timer Event :)\n");
 163     }
 164 }