common/keyboard.c

   1 /*
   2 Copyright 2011,2012,2013 Jun Wako <wakojun@gmail.com>
   3
   4 This program is free software: you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation, either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17 #include <stdint.h>
  18 #include <util/delay.h>
  19 #include "keyboard.h"
  20 #include "matrix.h"
  21 #include "keymap.h"
  22 #include "host.h"
  23 #include "led.h"
  24 #include "keycode.h"
  25 #include "timer.h"
  26 #include "print.h"
  27 #include "debug.h"
  28 #include "command.h"
  29 #include "util.h"
  30 #include "sendchar.h"
  31 #include "bootloader.h"
  32 #ifdef MOUSEKEY_ENABLE
  33 #include "mousekey.h"
  34 #endif
  35
  36
  37 #ifdef MATRIX_HAS_GHOST
  38 static bool has_ghost_in_row(uint8_t row)
  39 {
  40     matrix_row_t matrix_row = matrix_get_row(row);
  41     // No ghost exists when less than 2 keys are down on the row
  42     if (((matrix_row - 1) & matrix_row) == 0)
  43         return false;
  44
  45     // Ghost occurs when the row shares column line with other row
  46     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
  47         if (i != row && (matrix_get_row(i) & matrix_row))
  48             return true;
  49     }
  50     return false;
  51 }
  52 #endif
  53
  54
  55 void keyboard_init(void)
  56 {
  57     // TODO: configuration of sendchar impl
  58     print_sendchar_func = sendchar;
  59
  60     timer_init();
  61     matrix_init();
  62
  63     /* matrix scan for boot magic keys */
  64 #ifdef DEBOUNCE
  65     uint8_t scan = DEBOUNCE * 2;
  66     while (scan--) { matrix_scan(); _delay_ms(1); }
  67 #else
  68     matrix_scan();
  69 #endif
  70
  71     /* boot magic keys */
  72 #ifdef IS_BOOTMAGIC_BOOTLOADER
  73     /* kick up bootloader */
  74     if (IS_BOOTMAGIC_BOOTLOADER()) bootloader_jump();
  75 #endif
  76 #ifdef IS_BOOTMAGIC_DEBUG
  77     if (IS_BOOTMAGIC_DEBUG()) debug_enable = true;
  78 #endif
  79
  80 #ifdef PS2_MOUSE_ENABLE
  81     ps2_mouse_init();
  82 #endif
  83 }
  84
  85 /*
  86  * Do keyboard routine jobs: scan mantrix, light LEDs, ...
  87  * This is repeatedly called as fast as possible.
  88  */
  89 void keyboard_task(void)
  90 {
  91     static matrix_row_t matrix_prev[MATRIX_ROWS];
  92     static uint8_t led_status = 0;
  93     matrix_row_t matrix_row = 0;
  94     matrix_row_t matrix_change = 0;
  95
  96     matrix_scan();
  97     for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
  98         matrix_row = matrix_get_row(r);
  99         matrix_change = matrix_row ^ matrix_prev[r];
 100         if (matrix_change) {
 101             if (debug_matrix) matrix_print();
 102 #ifdef MATRIX_HAS_GHOST
 103             if (has_ghost_in_row(r)) {
 104                 matrix_prev[r] = matrix_row;
 105                 continue;
 106             }
 107 #endif
 108             for (uint8_t c = 0; c < MATRIX_COLS; c++) {
 109                 if (matrix_change & ((matrix_row_t)1<<c)) {
 110                     action_exec((keyevent_t){
 111                         .key = (key_t){ .row = r, .col = c },
 112                         .pressed = (matrix_row & ((matrix_row_t)1<<c)),
 113                         .time = (timer_read() | 1) /* time should not be 0 */
 114                     });
 115                     // record a processed key
 116                     matrix_prev[r] ^= ((matrix_row_t)1<<c);
 117                     // process a key per task call
 118                     goto MATRIX_LOOP_END;
 119                 }
 120             }
 121         }
 122     }
 123     // call with pseudo tick event when no real key event.
 124     action_exec(TICK);
 125
 126 MATRIX_LOOP_END:
 127 #ifdef MOUSEKEY_ENABLE
 128     // mousekey repeat & acceleration
 129     mousekey_task();
 130 #endif
 131     // update LED
 132     if (led_status != host_keyboard_leds()) {
 133         led_status = host_keyboard_leds();
 134         keyboard_set_leds(led_status);
 135     }
 136 }
 137
 138 void keyboard_set_leds(uint8_t leds)
 139 {
 140     led_set(leds);
 141 }