jackcartersmith/blackmagic
1
0
Fork 0
Code Issues Pull Requests Releases Activity

Added proper gamma correction tables.

Browse Source
This commit is contained in:
Piotr Esden-Tempski 2010-02-22 12:59:15 +01:00
parent 18097d9ed0
commit 002ec200ad
1 changed files with 114 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

146
examples/mb525/pwmleds/pwmleds.c
View File

@ -21,39 +21,121 @@
#include <libopenstm32/gpio.h>
#include <libopenstm32/timer.h>
#define GAMMA_3_0
/*
* Gamma correction table
*
* The nonlinear tables are calculating with the function:
* Iout = Iin ** gamma
*/
static const uint16_t gamma_table[] = {
1, 4, 9, 17, 26, 37, 51, 67,
84, 104, 126, 149, 175, 203, 233, 265,
299, 334, 372, 412, 454, 499, 545, 593,
643, 695, 749, 805, 864, 924, 986, 1050,
1116, 1185, 1255, 1327, 1402, 1478, 1556, 1637,
1719, 1803, 1890, 1978, 2068, 2161, 2255, 2352,
2450, 2550, 2653, 2757, 2864, 2972, 3082, 3195,
3309, 3426, 3544, 3664, 3787, 3911, 4038, 4166,
4296, 4429, 4563, 4700, 4838, 4978, 5121, 5265,
5411, 5560, 5710, 5862, 6017, 6173, 6331, 6492,
6654, 6818, 6985, 7153, 7323, 7495, 7670, 7846,
8024, 8204, 8387, 8571, 8757, 8945, 9135, 9327,
9521, 9718, 9916, 10116, 10318, 10522, 10728, 10936,
11146, 11358, 11572, 11788, 12006, 12226, 12448, 12672,
12897, 13125, 13355, 13587, 13821, 14057, 14294, 14534,
14776, 15020, 15265, 15513, 15763, 16014, 16268, 16524,
16781, 17041, 17302, 17566, 17831, 18099, 18368, 18640,
18913, 19189, 19466, 19745, 20027, 20310, 20595, 20883,
21172, 21463, 21756, 22051, 22349, 22648, 22949, 23252,
23557, 23864, 24173, 24484, 24797, 25112, 25429, 25748,
26069, 26391, 26716, 27043, 27372, 27702, 28035, 28370,
28707, 29045, 29386, 29728, 30073, 30419, 30768, 31118,
31471, 31825, 32182, 32540, 32900, 33263, 33627, 33993,
34361, 34731, 35104, 35478, 35854, 36232, 36612, 36994,
37378, 37764, 38152, 38542, 38933, 39327, 39723, 40121,
40521, 40922, 41326, 41732, 42139, 42549, 42960, 43374,
43789, 44207, 44626, 45048, 45471, 45896, 46324, 46753,
47184, 47617, 48052, 48490, 48929, 49370, 49813, 50258,
50705, 51154, 51604, 52057, 52512, 52969, 53428, 53888,
54351, 54816, 55282, 55751, 56222, 56694, 57169, 57645,
58123, 58604, 59086, 59570, 60057, 60545, 61035, 61527,
62021, 62517, 63016, 63516, 64018, 64521, 65027, 65535
#ifdef GAMMA_LINEAR
1, 4, 9, 17, 26, 37, 51, 67,
84, 104, 126, 149, 175, 203, 233, 265,
299, 334, 372, 412, 454, 499, 545, 593,
643, 695, 749, 805, 864, 924, 986, 1050,
1116, 1185, 1255, 1327, 1402, 1478, 1556, 1637,
1719, 1803, 1890, 1978, 2068, 2161, 2255, 2352,
2450, 2550, 2653, 2757, 2864, 2972, 3082, 3195,
3309, 3426, 3544, 3664, 3787, 3911, 4038, 4166,
4296, 4429, 4563, 4700, 4838, 4978, 5121, 5265,
5411, 5560, 5710, 5862, 6017, 6173, 6331, 6492,
6654, 6818, 6985, 7153, 7323, 7495, 7670, 7846,
8024, 8204, 8387, 8571, 8757, 8945, 9135, 9327,
9521, 9718, 9916, 10116, 10318, 10522, 10728, 10936,
11146, 11358, 11572, 11788, 12006, 12226, 12448, 12672,
12897, 13125, 13355, 13587, 13821, 14057, 14294, 14534,
14776, 15020, 15265, 15513, 15763, 16014, 16268, 16524,
16781, 17041, 17302, 17566, 17831, 18099, 18368, 18640,
18913, 19189, 19466, 19745, 20027, 20310, 20595, 20883,
21172, 21463, 21756, 22051, 22349, 22648, 22949, 23252,
23557, 23864, 24173, 24484, 24797, 25112, 25429, 25748,
26069, 26391, 26716, 27043, 27372, 27702, 28035, 28370,
28707, 29045, 29386, 29728, 30073, 30419, 30768, 31118,
31471, 31825, 32182, 32540, 32900, 33263, 33627, 33993,
34361, 34731, 35104, 35478, 35854, 36232, 36612, 36994,
37378, 37764, 38152, 38542, 38933, 39327, 39723, 40121,
40521, 40922, 41326, 41732, 42139, 42549, 42960, 43374,
43789, 44207, 44626, 45048, 45471, 45896, 46324, 46753,
47184, 47617, 48052, 48490, 48929, 49370, 49813, 50258,
50705, 51154, 51604, 52057, 52512, 52969, 53428, 53888,
54351, 54816, 55282, 55751, 56222, 56694, 57169, 57645,
58123, 58604, 59086, 59570, 60057, 60545, 61035, 61527,
62021, 62517, 63016, 63516, 64018, 64521, 65027, 65535
#else
#ifdef GAMMA_1_3
// Gamma 1.3
0, 1, 2, 4, 6, 8, 10, 13,
15, 17, 20, 23, 25, 28, 31, 34,
37, 40, 43, 46, 49, 52, 56, 59,
62, 66, 69, 73, 76, 80, 83, 87,
91, 94, 98, 102, 105, 109, 113, 117,
121, 125, 129, 133, 137, 141, 145, 149,
153, 157, 162, 166, 170, 174, 179, 183,
187, 192, 196, 200, 205, 209, 214, 218,
223, 227, 232, 237, 241, 246, 250, 255,
260, 264, 269, 274, 279, 283, 288, 293,
298, 303, 308, 312, 317, 322, 327, 332,
337, 342, 347, 352, 357, 362, 367, 372,
378, 383, 388, 393, 398, 403, 408, 414,
419, 424, 429, 435, 440, 445, 451, 456,
461, 467, 472, 477, 483, 488, 494, 499,
505, 510, 516, 521, 527, 532, 538, 543,
549, 554, 560, 566, 571, 577, 582, 588,
594, 599, 605, 611, 617, 622, 628, 634,
640, 645, 651, 657, 663, 669, 674, 680,
686, 692, 698, 704, 710, 716, 722, 727,
733, 739, 745, 751, 757, 763, 769, 775,
781, 788, 794, 800, 806, 812, 818, 824,
830, 836, 842, 849, 855, 861, 867, 873,
880, 886, 892, 898, 904, 911, 917, 923,
930, 936, 942, 949, 955, 961, 968, 974,
980, 987, 993, 999, 1006, 1012, 1019, 1025,
1032, 1038, 1044, 1051, 1057, 1064, 1070, 1077,
1083, 1090, 1096, 1103, 1110, 1116, 1123, 1129,
1136, 1142, 1149, 1156, 1162, 1169, 1176, 1182,
1189, 1196, 1202, 1209, 1216, 1222, 1229, 1236,
1242, 1249, 1256, 1263, 1269, 1276, 1283, 1290,
1297, 1303, 1310, 1317, 1324, 1331, 1337, 1344
#else
#ifdef GAMMA_3_0
// gamma = 3.0014
0, 1, 4, 9, 16, 25, 36, 49,
64, 81, 100, 121, 145, 170, 197, 226,
257, 290, 325, 362, 402, 443, 486, 531,
579, 628, 679, 732, 788, 845, 904, 966,
1029, 1094, 1162, 1231, 1303, 1376, 1451, 1529,
1608, 1690, 1773, 1859, 1946, 2036, 2127, 2221,
2317, 2414, 2514, 2615, 2719, 2825, 2932, 3042,
3154, 3267, 3383, 3501, 3621, 3742, 3866, 3992,
4120, 4250, 4382, 4516, 4651, 4789, 4929, 5071,
5215, 5361, 5509, 5659, 5811, 5965, 6121, 6279,
6439, 6601, 6766, 6932, 7100, 7270, 7442, 7616,
7793, 7971, 8151, 8333, 8518, 8704, 8892, 9083,
9275, 9469, 9666, 9864, 10065, 10267, 10472, 10678,
10887, 11097, 11310, 11524, 11741, 11959, 12180, 12403,
12627, 12854, 13082, 13313, 13546, 13781, 14017, 14256,
14497, 14740, 14984, 15231, 15480, 15731, 15984, 16239,
16496, 16755, 17016, 17279, 17544, 17811, 18080, 18351,
18624, 18899, 19176, 19455, 19736, 20019, 20304, 20592,
20881, 21172, 21465, 21761, 22058, 22357, 22658, 22962,
23267, 23574, 23884, 24195, 24509, 24824, 25142, 25461,
25783, 26106, 26432, 26759, 27089, 27420, 27754, 28090,
28427, 28767, 29109, 29452, 29798, 30146, 30495, 30847,
31201, 31557, 31915, 32275, 32636, 33000, 33366, 33734,
34104, 34476, 34850, 35226, 35604, 35984, 36366, 36750,
37136, 37524, 37915, 38307, 38701, 39097, 39495, 39896,
40298, 40702, 41108, 41517, 41927, 42339, 42754, 43170,
43589, 44009, 44431, 44856, 45282, 45711, 46141, 46574,
47008, 47445, 47884, 48324, 48767, 49212, 49658, 50107,
50558, 51010, 51465, 51922, 52381, 52841, 53304, 53769,
54236, 54705, 55176, 55649, 56124, 56601, 57080, 57561,
58044, 58529, 59016, 59505, 59996, 60489, 60984, 61481,
61981, 62482, 62985, 63490, 63998, 64507, 65018, 65531
#endif
#endif
#endif
};
/* Set STM32 to 72 MHz. */