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 "backlight.h"
  34 #ifdef MOUSEKEY_ENABLE
  35 #   include "mousekey.h"
  36 #endif
  37 #ifdef PS2_MOUSE_ENABLE
  38 #   include "ps2_mouse.h"
  39 #endif
  40
  41
  42 #ifdef MATRIX_HAS_GHOST
  43 static bool has_ghost_in_row(uint8_t row)
  44 {
  45     matrix_row_t matrix_row = matrix_get_row(row);
  46     // No ghost exists when less than 2 keys are down on the row
  47     if (((matrix_row - 1) & matrix_row) == 0)
  48         return false;
  49
  50     // Ghost occurs when the row shares column line with other row
  51     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
  52         if (i != row && (matrix_get_row(i) & matrix_row))
  53             return true;
  54     }
  55     return false;
  56 }
  57 #endif
  58
  59
  60 void keyboard_init(void)
  61 {
  62     timer_init();
  63     matrix_init();
  64 #ifdef PS2_MOUSE_ENABLE
  65     ps2_mouse_init();
  66 #endif
  67
  68 #ifdef BOOTMAGIC_ENABLE
  69     bootmagic();
  70 #endif
  71
  72 #ifdef BACKLIGHT_ENABLE
  73     backlight_init();
  74 #endif
  75 }
  76
  77 /*
  78  * Do keyboard routine jobs: scan mantrix, light LEDs, ...
  79  * This is repeatedly called as fast as possible.
  80  */
  81 void keyboard_task(void)
  82 {
  83     static matrix_row_t matrix_prev[MATRIX_ROWS];
  84     static uint8_t led_status = 0;
  85     matrix_row_t matrix_row = 0;
  86     matrix_row_t matrix_change = 0;
  87
  88     matrix_scan();
  89     for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
  90         matrix_row = matrix_get_row(r);
  91         matrix_change = matrix_row ^ matrix_prev[r];
  92         if (matrix_change) {
  93             if (debug_matrix) matrix_print();
  94 #ifdef MATRIX_HAS_GHOST
  95             if (has_ghost_in_row(r)) {
  96                 matrix_prev[r] = matrix_row;
  97                 continue;
  98             }
  99 #endif
 100             for (uint8_t c = 0; c < MATRIX_COLS; c++) {
 101                 if (matrix_change & ((matrix_row_t)1<<c)) {
 102                     action_exec((keyevent_t){
 103                         .key = (key_t){ .row = r, .col = c },
 104                         .pressed = (matrix_row & ((matrix_row_t)1<<c)),
 105                         .time = (timer_read() | 1) /* time should not be 0 */
 106                     });
 107                     // record a processed key
 108                     matrix_prev[r] ^= ((matrix_row_t)1<<c);
 109                     // process a key per task call
 110                     goto MATRIX_LOOP_END;
 111                 }
 112             }
 113         }
 114     }
 115     // call with pseudo tick event when no real key event.
 116     action_exec(TICK);
 117
 118 MATRIX_LOOP_END:
 119
 120 #ifdef MOUSEKEY_ENABLE
 121     // mousekey repeat & acceleration
 122     mousekey_task();
 123 #endif
 124
 125 #ifdef PS2_MOUSE_ENABLE
 126     if (ps2_mouse_read() == 0) {
 127         ps2_mouse_usb_send();
 128     }
 129 #endif
 130
 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     if (debug_keyboard) { debug("keyboard_set_led: "); debug_hex8(leds); debug("\n"); }
 141     led_set(leds);
 142 }