quantum/led_tables.c

   1 /*
   2 Copyright 2017 Fred Sundvik
   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 This program is distributed in the hope that it will be useful,
   9 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 GNU General Public License for more details.
  12 You should have received a copy of the GNU General Public License
  13 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14 */
  15
  16 #include "led_tables.h"
  17
  18 // clang-format off
  19
  20 #ifdef USE_CIE1931_CURVE
  21 // Lightness curve using the CIE 1931 lightness formula
  22 // Generated by the python script provided in http://jared.geek.nz/2013/feb/linear-led-pwm
  23 const uint8_t CIE1931_CURVE[256] PROGMEM = {
  24     0,   1,   1,   1,   1,   1,   1,   1,   1,   1,   2,   2,   2,   2,   2,   2,
  25     2,   2,   2,   3,   3,   3,   3,   3,   3,   3,   3,   4,   4,   4,   4,   4,
  26     4,   4,   5,   5,   5,   5,   5,   6,   6,   6,   6,   6,   7,   7,   7,   7,
  27     7,   8,   8,   8,   8,   9,   9,   9,   9,  10,  10,  10,  11,  11,  11,  12,
  28    12,  12,  13,  13,  13,  14,  14,  14,  15,  15,  15,  16,  16,  17,  17,  17,
  29    18,  18,  19,  19,  20,  20,  21,  21,  22,  22,  23,  23,  24,  24,  25,  25,
  30    26,  26,  27,  27,  28,  29,  29,  30,  30,  31,  32,  32,  33,  34,  34,  35,
  31    36,  36,  37,  38,  38,  39,  40,  41,  41,  42,  43,  44,  45,  45,  46,  47,
  32    48,  49,  50,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,  60,  61,  62,
  33    63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,  76,  77,  78,  79,
  34    80,  81,  83,  84,  85,  86,  88,  89,  90,  91,  93,  94,  95,  97,  98, 100,
  35   101, 102, 104, 105, 107, 108, 109, 111, 112, 114, 115, 117, 119, 120, 122, 123,
  36   125, 126, 128, 130, 131, 133, 135, 136, 138, 140, 142, 143, 145, 147, 149, 150,
  37   152, 154, 156, 158, 160, 162, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181,
  38   183, 186, 188, 190, 192, 194, 196, 198, 201, 203, 205, 207, 209, 212, 214, 216,
  39   219, 221, 223, 226, 228, 231, 233, 235, 238, 240, 243, 245, 248, 250, 253, 255
  40 };
  41 #endif
  42
  43 // clang-format on