common/backlight.c

   1 /*
   2 Copyright 2013 Mathias Andersson <wraul@dbox.se>
   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 "backlight.h"
  19 #include "eeconfig.h"
  20 #include "debug.h"
  21
  22 backlight_config_t backlight_config;
  23
  24 void backlight_init(void)
  25 {
  26     /* check signature */
  27     if (!eeconfig_is_enabled()) {
  28         eeconfig_init();
  29     }
  30     backlight_config.raw = eeconfig_read_backlight();
  31     backlight_set(backlight_config.enable ? backlight_config.level : 0);
  32 }
  33
  34 void backlight_increase(void)
  35 {
  36     if(backlight_config.level < BACKLIGHT_LEVELS)
  37     {
  38         backlight_config.level++;
  39         backlight_config.enable = 1;
  40         eeconfig_write_backlight(backlight_config.raw);
  41     }
  42     dprintf("backlight increase: %u\n", backlight_config.level);
  43     backlight_set(backlight_config.level);
  44 }
  45
  46 void backlight_decrease(void)
  47 {
  48     if(backlight_config.level > 0)
  49     {
  50         backlight_config.level--;
  51         backlight_config.enable = !!backlight_config.level;
  52         eeconfig_write_backlight(backlight_config.raw);
  53     }
  54     dprintf("backlight decrease: %u\n", backlight_config.level);
  55     backlight_set(backlight_config.level);
  56 }
  57
  58 void backlight_toggle(void)
  59 {
  60     backlight_config.enable ^= 1;
  61     eeconfig_write_backlight(backlight_config.raw);
  62     dprintf("backlight toggle: %u\n", backlight_config.enable);
  63     backlight_set(backlight_config.enable ? backlight_config.level : 0);
  64 }
  65
  66 void backlight_step(void)
  67 {
  68     backlight_config.level++;
  69     if(backlight_config.level > BACKLIGHT_LEVELS)
  70     {
  71         backlight_config.level = 0;
  72     }
  73     backlight_config.enable = !!backlight_config.level;
  74     eeconfig_write_backlight(backlight_config.raw);
  75     dprintf("backlight step: %u\n", backlight_config.level);
  76     backlight_set(backlight_config.level);
  77 }
  78
  79 void backlight_level(uint8_t level)
  80 {
  81     backlight_config.level ^= level;
  82     backlight_config.enable = !!backlight_config.level;
  83     eeconfig_write_backlight(backlight_config.raw);
  84     backlight_set(backlight_config.level);
  85 }