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 "keyboard.h"
  19 #include "matrix.h"
  20 #include "keymap.h"
  21 #include "host.h"
  22 #include "led.h"
  23 #include "keycode.h"
  24 #include "timer.h"
  25 #include "print.h"
  26 #include "debug.h"
  27 #include "command.h"
  28 #include "util.h"
  29 #include "sendchar.h"
  30 #include "bootmagic.h"
  31 #include "eeconfig.h"
  32 #include "backlight.h"
  33 #ifdef MOUSEKEY_ENABLE
  34 #   include "mousekey.h"
  35 #endif
  36 #ifdef PS2_MOUSE_ENABLE
  37 #   include "ps2_mouse.h"
  38 #endif
  39
  40
  41 #ifdef MATRIX_HAS_GHOST
  42 static bool has_ghost_in_row(uint8_t row)
  43 {
  44     matrix_row_t matrix_row = matrix_get_row(row);
  45     // No ghost exists when less than 2 keys are down on the row
  46     if (((matrix_row - 1) & matrix_row) == 0)
  47         return false;
  48
  49     // Ghost occurs when the row shares column line with other row
  50     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
  51         if (i != row && (matrix_get_row(i) & matrix_row))
  52             return true;
  53     }
  54     return false;
  55 }
  56 #endif
  57
  58
  59 void keyboard_init(void)
  60 {
  61     timer_init();
  62     matrix_init();
  63 #ifdef PS2_MOUSE_ENABLE
  64     ps2_mouse_init();
  65 #endif
  66
  67 #ifdef BOOTMAGIC_ENABLE
  68     bootmagic();
  69 #endif
  70
  71 #ifdef BACKLIGHT_ENABLE
  72     backlight_init();
  73 #endif
  74 }
  75
  76 /*
  77  * Do keyboard routine jobs: scan mantrix, light LEDs, ...
  78  * This is repeatedly called as fast as possible.
  79  */
  80 void keyboard_task(void)
  81 {
  82     static matrix_row_t matrix_prev[MATRIX_ROWS];
  83     static uint8_t led_status = 0;
  84     matrix_row_t matrix_row = 0;
  85     matrix_row_t matrix_change = 0;
  86
  87     matrix_scan();
  88     for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
  89         matrix_row = matrix_get_row(r);
  90         matrix_change = matrix_row ^ matrix_prev[r];
  91         if (matrix_change) {
  92             if (debug_matrix) matrix_print();
  93 #ifdef MATRIX_HAS_GHOST
  94             if (has_ghost_in_row(r)) {
  95                 matrix_prev[r] = matrix_row;
  96                 continue;
  97             }
  98 #endif
  99             for (uint8_t c = 0; c < MATRIX_COLS; c++) {
 100                 if (matrix_change & ((matrix_row_t)1<<c)) {
 101                     action_exec((keyevent_t){
 102                         .key = (keypos_t){ .row = r, .col = c },
 103                         .pressed = (matrix_row & ((matrix_row_t)1<<c)),
 104                         .time = (timer_read() | 1) /* time should not be 0 */
 105                     });
 106                     // record a processed key
 107                     matrix_prev[r] ^= ((matrix_row_t)1<<c);
 108                     // process a key per task call
 109                     goto MATRIX_LOOP_END;
 110                 }
 111             }
 112         }
 113     }
 114     // call with pseudo tick event when no real key event.
 115     action_exec(TICK);
 116
 117 MATRIX_LOOP_END:
 118
 119 #ifdef MOUSEKEY_ENABLE
 120     // mousekey repeat & acceleration
 121     mousekey_task();
 122 #endif
 123
 124 #ifdef PS2_MOUSE_ENABLE
 125     ps2_mouse_task();
 126 #endif
 127
 128     // update LED
 129     if (led_status != host_keyboard_leds()) {
 130         led_status = host_keyboard_leds();
 131         keyboard_set_leds(led_status);
 132     }
 133 }
 134
 135 void keyboard_set_leds(uint8_t leds)
 136 {
 137     if (debug_keyboard) { debug("keyboard_set_led: "); debug_hex8(leds); debug("\n"); }
 138     led_set(leds);
 139 }