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 "bootmagic.h"
  32 #include "eeconfig.h"
  33 #include "mousekey.h"
  34 #include "backlight.h"
  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     timer_init();
  58     matrix_init();
  59 #ifdef PS2_MOUSE_ENABLE
  60     ps2_mouse_init();
  61 #endif
  62
  63 #ifdef BOOTMAGIC_ENABLE
  64     bootmagic();
  65 #endif
  66
  67 #ifdef BACKLIGHT_ENABLE
  68     backlight_init();
  69 #endif
  70 }
  71
  72 /*
  73  * Do keyboard routine jobs: scan mantrix, light LEDs, ...
  74  * This is repeatedly called as fast as possible.
  75  */
  76 void keyboard_task(void)
  77 {
  78     static matrix_row_t matrix_prev[MATRIX_ROWS];
  79     static uint8_t led_status = 0;
  80     matrix_row_t matrix_row = 0;
  81     matrix_row_t matrix_change = 0;
  82
  83     matrix_scan();
  84     for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
  85         matrix_row = matrix_get_row(r);
  86         matrix_change = matrix_row ^ matrix_prev[r];
  87         if (matrix_change) {
  88             if (debug_matrix) matrix_print();
  89 #ifdef MATRIX_HAS_GHOST
  90             if (has_ghost_in_row(r)) {
  91                 matrix_prev[r] = matrix_row;
  92                 continue;
  93             }
  94 #endif
  95             for (uint8_t c = 0; c < MATRIX_COLS; c++) {
  96                 if (matrix_change & ((matrix_row_t)1<<c)) {
  97                     action_exec((keyevent_t){
  98                         .key = (key_t){ .row = r, .col = c },
  99                         .pressed = (matrix_row & ((matrix_row_t)1<<c)),
 100                         .time = (timer_read() | 1) /* time should not be 0 */
 101                     });
 102                     // record a processed key
 103                     matrix_prev[r] ^= ((matrix_row_t)1<<c);
 104                     // process a key per task call
 105                     goto MATRIX_LOOP_END;
 106                 }
 107             }
 108         }
 109     }
 110     // call with pseudo tick event when no real key event.
 111     action_exec(TICK);
 112
 113 MATRIX_LOOP_END:
 114 #ifdef MOUSEKEY_ENABLE
 115     // mousekey repeat & acceleration
 116     mousekey_task();
 117 #endif
 118     // update LED
 119     if (led_status != host_keyboard_leds()) {
 120         led_status = host_keyboard_leds();
 121         keyboard_set_leds(led_status);
 122     }
 123 }
 124
 125 void keyboard_set_leds(uint8_t leds)
 126 {
 127     if (debug_keyboard) { debug("keyboard_set_led: "); debug_hex8(leds); debug("\n"); }
 128     led_set(leds);
 129 }