At least for now, use Scott Torborg's http://web.mit.edu/storborg/Public/hsvtorgb.c

LEDControl.cpp

@@ -139,10 +139,10 @@ void LEDControl_::effect_rainbow_update() {
     } else {
         rainbow_current_ticks = 0;
     }
-    rainbow.SetHSV(rainbow_hue, rainbow_saturation, rainbow_value);
+    hsv_to_rgb( &rainbow, rainbow_hue, rainbow_saturation, rainbow_value);
     rainbow_hue += rainbow_steps;
-    if (rainbow_hue >= 360)          {
-        rainbow_hue %= 360;
+    if (rainbow_hue >= 255)          {
+        rainbow_hue %= 255;
     }
     set_all_leds_to(rainbow);
     led_sync();
@@ -157,15 +157,15 @@ void LEDControl_::effect_rainbow_wave_update() {
 
     for (uint8_t i = 0; i < LED_COUNT; i++) {
         uint16_t key_hue = rainbow_hue +16*(i/4);
-        if (key_hue >= 360)          {
-            key_hue %= 360;
+        if (key_hue >= 255)          {
+            key_hue %= 255;
         }
-        rainbow.SetHSV(key_hue, rainbow_saturation, rainbow_value);
+        hsv_to_rgb(&rainbow, key_hue, rainbow_saturation, rainbow_value);
         led_set_crgb_at(i,rainbow);
     }
     rainbow_hue += rainbow_wave_steps;
-    if (rainbow_hue >= 360)          {
-        rainbow_hue %= 360;
+    if (rainbow_hue >= 255)          {
+        rainbow_hue %= 255;
     }
     led_sync();
 }
@@ -203,4 +203,47 @@ void LEDControl_::type_letter(uint8_t letter) {
 }
 
 
+// From http://web.mit.edu/storborg/Public/hsvtorgb.c - talk to Scott about licensing
+void LEDControl_::hsv_to_rgb(cRGB *cRGB, uint16_t h, uint16_t s, uint16_t v)  {
+/* HSV to RGB conversion function with only integer
+ * math */
+    uint16_t region, fpart, p, q, t;
+    
+    if(s == 0) {
+        /* color is grayscale */
+        cRGB->r = cRGB->g = cRGB->b = v;
+        return;
+    }
+    
+    /* make hue 0-5 */
+    region = h / 43;
+    /* find remainder part, make it from 0-255 */
+    fpart = (h - (region * 43)) * 6;
+    
+    /* calculate temp vars, doing integer multiplication */
+    p = (v * (255 - s)) >> 8;
+    q = (v * (255 - ((s * fpart) >> 8))) >> 8;
+    t = (v * (255 - ((s * (255 - fpart)) >> 8))) >> 8;
+        
+    /* assign temp vars based on color cone region */
+    switch(region) {
+        case 0:
+            cRGB->r = v; cRGB->g = t; cRGB->b = p; break;
+        case 1:
+            cRGB->r = q; cRGB->g = v; cRGB->b = p; break;
+        case 2:
+            cRGB->r = p; cRGB->g = v; cRGB->b = t; break;
+        case 3:
+            cRGB->r = p; cRGB->g = q; cRGB->b = v; break;
+        case 4:
+            cRGB->r = t; cRGB->g = p; cRGB->b = v; break;
+        default:
+            cRGB->r = v; cRGB->g = p; cRGB->b = q; break;
+    }
+    
+    return;
+}
+
+
+
 LEDControl_ LEDControl;

LEDControl.h

@@ -30,7 +30,7 @@ class LEDControl_ {
     uint8_t last_led_mode = 0;
     uint8_t stored_led_mode = 0;
     uint8_t pos = 0;
-
+    void hsv_to_rgb(cRGB *cRGB, uint16_t h, uint16_t s, uint16_t v);
 
 
 

implementation/Model01.h

@@ -8,6 +8,7 @@
 #include "../key_events.h"
 
 
+
 #define RIGHT_COLS 8
 #define RIGHT_ROWS 4
 #define LEFT_COLS 8