common/mousekey.c

   1 /*
   2 Copyright 2011 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
  18 #include <stdint.h>
  19 #include <util/delay.h>
  20 #include "usb_keycodes.h"
  21 #include "host.h"
  22 #include "timer.h"
  23 #include "print.h"
  24 #include "debug.h"
  25 #include "mousekey.h"
  26
  27
  28 static report_mouse_t report;
  29 static report_mouse_t report_prev;
  30
  31 static uint8_t mousekey_repeat =  0;
  32
  33 static void mousekey_debug(void);
  34
  35
  36 /*
  37  * TODO: fix acceleration algorithm
  38  * see wikipedia http://en.wikipedia.org/wiki/Mouse_keys
  39  */
  40 #ifndef MOUSEKEY_DELAY_TIME
  41 #   define MOUSEKEY_DELAY_TIME 255
  42 #endif
  43
  44 // acceleration parameters
  45 uint8_t mousekey_move_unit = 2;
  46 uint8_t mousekey_resolution = 5;
  47
  48
  49 static inline uint8_t move_unit(void)
  50 {
  51     uint16_t unit = 5 + mousekey_repeat*2;
  52     return (unit > 63 ? 63 : unit);
  53 }
  54
  55 void mousekey_decode(uint8_t code)
  56 {
  57     if      (code == KB_MS_UP)      report.y = -move_unit();
  58     else if (code == KB_MS_DOWN)    report.y = move_unit();
  59     else if (code == KB_MS_LEFT)    report.x = -move_unit();
  60     else if (code == KB_MS_RIGHT)   report.x = move_unit();
  61     else if (code == KB_MS_BTN1)    report.buttons |= MOUSE_BTN1;
  62     else if (code == KB_MS_BTN2)    report.buttons |= MOUSE_BTN2;
  63     else if (code == KB_MS_BTN3)    report.buttons |= MOUSE_BTN3;
  64     else if (code == KB_MS_BTN4)    report.buttons |= MOUSE_BTN4;
  65     else if (code == KB_MS_BTN5)    report.buttons |= MOUSE_BTN5;
  66     else if (code == KB_MS_WH_UP)   report.v += move_unit()/4;
  67     else if (code == KB_MS_WH_DOWN) report.v -= move_unit()/4;
  68     else if (code == KB_MS_WH_LEFT) report.h -= move_unit()/4;
  69     else if (code == KB_MS_WH_RIGHT)report.h += move_unit()/4;
  70 }
  71
  72 bool mousekey_changed(void)
  73 {
  74     return (report.buttons != report_prev.buttons ||
  75             report.x || report.y || report.v || report.h);
  76 }
  77
  78 void mousekey_send(void)
  79 {
  80     static uint16_t last_timer = 0;
  81
  82     if (!mousekey_changed()) {
  83         mousekey_repeat = 0;
  84         mousekey_clear_report();
  85         return;
  86     }
  87
  88     // send immediately when buttun state is changed
  89     if (report.buttons == report_prev.buttons) {
  90         if (timer_elapsed(last_timer) < 100) {
  91             mousekey_clear_report();
  92             return;
  93         }
  94     }
  95
  96     if (mousekey_repeat != 0xFF) {
  97         mousekey_repeat++;
  98     }
  99
 100     if (report.x && report.y) {
 101         report.x *= 0.7;
 102         report.y *= 0.7;
 103     }
 104
 105     mousekey_debug();
 106     host_mouse_send(&report);
 107     report_prev = report;
 108     last_timer = timer_read();
 109     mousekey_clear_report();
 110 }
 111
 112 void mousekey_clear_report(void)
 113 {
 114     report.buttons = 0;
 115     report.x = 0;
 116     report.y = 0;
 117     report.v = 0;
 118     report.h = 0;
 119 }
 120
 121 static void mousekey_debug(void)
 122 {
 123     if (!debug_mouse) return;
 124     print("mousekey[btn|x y v h]: ");
 125     phex(report.buttons); print("|");
 126     phex(report.x); print(" ");
 127     phex(report.y); print(" ");
 128     phex(report.v); print(" ");
 129     phex(report.h);
 130     phex(mousekey_repeat);
 131     print("\n");
 132 }