Merge pull request #39 from zsa/fix/hue_to_rgb_tuning

Adjusted the linear led table and hsv_to_rgb to better handle 255 hue

2 files changed, 24 insertions, 33 deletions

diff --git a/quantum/color.c b/quantum/color.c
index c49877592e..466e6edacb 100644
--- a/quantum/color.c
+++ b/quantum/color.c
@@ -22,8 +22,8 @@
 RGB hsv_to_rgb( HSV hsv )
 {
 	RGB rgb;
-	uint8_t region, p, q, t;
-	uint16_t h, s, v, remainder;
+	uint8_t region, remainder, p, q, t;
+	uint16_t h, s, v;
 
 	if ( hsv.s == 0 )
 	{
@@ -37,8 +37,8 @@ RGB hsv_to_rgb( HSV hsv )
 	s = hsv.s;
 	v = hsv.v;
 
-	region = h / 43;
-	remainder = (h - (region * 43)) * 6;
+	region = h * 6 / 255;
+	remainder = (h * 2 - region * 85) * 3;
 
 	p = (v * (255 - s)) >> 8;
 	q = (v * (255 - ((s * remainder) >> 8))) >> 8;
@@ -46,6 +46,7 @@ RGB hsv_to_rgb( HSV hsv )
 
 	switch ( region )
 	{
+		case 6:
 		case 0:
 			rgb.r = v;
 			rgb.g = t;
diff --git a/quantum/led_tables.c b/quantum/led_tables.c
index b99f262097..0eeb5c44b6 100644
--- a/quantum/led_tables.c
+++ b/quantum/led_tables.c
@@ -19,38 +19,28 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef USE_CIE1931_CURVE
 // Lightness curve using the CIE 1931 lightness formula
 //Generated by the python script provided in http://jared.geek.nz/2013/feb/linear-led-pwm
-const uint8_t CIE1931_CURVE[] PROGMEM = {
-    0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 2, 2, 2, 2, 2, 2,
-    2, 2, 2, 3, 3, 3, 3, 3, 3, 3,
-    3, 4, 4, 4, 4, 4, 4, 5, 5, 5,
-    5, 5, 6, 6, 6, 6, 6, 7, 7, 7,
-    7, 8, 8, 8, 8, 9, 9, 9, 10, 10,
-    10, 10, 11, 11, 11, 12, 12, 12, 13, 13,
-    13, 14, 14, 15, 15, 15, 16, 16, 17, 17,
-    17, 18, 18, 19, 19, 20, 20, 21, 21, 22,
-    22, 23, 23, 24, 24, 25, 25, 26, 26, 27,
-    28, 28, 29, 29, 30, 31, 31, 32, 32, 33,
-    34, 34, 35, 36, 37, 37, 38, 39, 39, 40,
-    41, 42, 43, 43, 44, 45, 46, 47, 47, 48,
-    49, 50, 51, 52, 53, 54, 54, 55, 56, 57,
-    58, 59, 60, 61, 62, 63, 64, 65, 66, 67,
-    68, 70, 71, 72, 73, 74, 75, 76, 77, 79,
-    80, 81, 82, 83, 85, 86, 87, 88, 90, 91,
-    92, 94, 95, 96, 98, 99, 100, 102, 103, 105,
-    106, 108, 109, 110, 112, 113, 115, 116, 118, 120,
-    121, 123, 124, 126, 128, 129, 131, 132, 134, 136,
-    138, 139, 141, 143, 145, 146, 148, 150, 152, 154,
-    155, 157, 159, 161, 163, 165, 167, 169, 171, 173,
-    175, 177, 179, 181, 183, 185, 187, 189, 191, 193,
-    196, 198, 200, 202, 204, 207, 209, 211, 214, 216,
-    218, 220, 223, 225, 228, 230, 232, 235, 237, 240,
-    242, 245, 247, 250, 252, 255,
-    };
+const uint8_t CIE1931_CURVE[256] PROGMEM = {
+  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   1,   1,   1,   1,   1,   1,
+  1,   1,   1,   2,   2,   2,   2,   2,   2,   2,   2,   3,   3,   3,   3,   3,
+  3,   3,   4,   4,   4,   4,   4,   5,   5,   5,   5,   5,   6,   6,   6,   6,
+  6,   7,   7,   7,   7,   8,   8,   8,   8,   9,   9,   9,  10,  10,  10,  11,
+ 11,  11,  12,  12,  12,  13,  13,  13,  14,  14,  14,  15,  15,  16,  16,  16,
+ 17,  17,  18,  18,  19,  19,  20,  20,  21,  21,  22,  22,  23,  23,  24,  24,
+ 25,  25,  26,  26,  27,  28,  28,  29,  29,  30,  31,  31,  32,  33,  33,  34,
+ 35,  35,  36,  37,  37,  38,  39,  40,  40,  41,  42,  43,  44,  44,  45,  46,
+ 47,  48,  49,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,  60,  61,
+ 62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  75,  76,  77,  78,
+ 79,  80,  82,  83,  84,  85,  87,  88,  89,  90,  92,  93,  94,  96,  97,  99,
+100, 101, 103, 104, 106, 107, 108, 110, 111, 113, 114, 116, 118, 119, 121, 122,
+124, 125, 127, 129, 130, 132, 134, 135, 137, 139, 141, 142, 144, 146, 148, 149,
+151, 153, 155, 157, 159, 161, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
+182, 185, 187, 189, 191, 193, 195, 197, 200, 202, 204, 206, 208, 211, 213, 215,
+218, 220, 222, 225, 227, 230, 232, 234, 237, 239, 242, 244, 247, 249, 252, 255
+};
 #endif
 
 #ifdef USE_LED_BREATHING_TABLE
-const uint8_t LED_BREATHING_TABLE[] PROGMEM = {
+const uint8_t LED_BREATHING_TABLE[256] PROGMEM = {
   0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 9,
   10, 11, 12, 14, 15, 17, 18, 20, 21, 23, 25, 27, 29, 31, 33, 35,
   37, 40, 42, 44, 47, 49, 52, 54, 57, 59, 62, 65, 67, 70, 73, 76,