Merge remote-tracking branch 'upstream/master'

1 files changed, 50 insertions, 1 deletions

diff --git a/keyboards/handwired/promethium/rgbsps.c b/keyboards/handwired/promethium/rgbsps.c
index ea922ec3f..f30badd35 100644
--- a/keyboards/handwired/promethium/rgbsps.c
+++ b/keyboards/handwired/promethium/rgbsps.c
@@ -21,4 +21,53 @@ void rgbsps_turnoff(void) {
 
 void rgbsps_send(void) {
   ws2812_setleds(led, RGBSPS_NUM);
-}
\ No newline at end of file
+}
+
+void rgbsps_sethsv(uint8_t index, uint16_t hue, uint8_t sat, uint8_t val) {
+  uint8_t r = 0, g = 0, b = 0, base, color;
+
+  if (sat == 0) { // Acromatic color (gray). Hue doesn't mind.
+    r = val;
+    g = val;
+    b = val;
+  } else {
+    base = ((255 - sat) * val) >> 8;
+    color = (val - base) * (hue % 60) / 60;
+
+    switch (hue / 60) {
+      case 0:
+        r = val;
+        g = base + color;
+        b = base;
+        break;
+      case 1:
+        r = val - color;
+        g = val;
+        b = base;
+        break;
+      case 2:
+        r = base;
+        g = val;
+        b = base + color;
+        break;
+      case 3:
+        r = base;
+        g = val - color;
+        b = val;
+        break;
+      case 4:
+        r = base + color;
+        g = base;
+        b = val;
+        break;
+      case 5:
+        r = val;
+        g = base;
+        b = val - color;
+        break;
+    }
+  }
+
+  rgbsps_set(index, r, g, b);
+}
+