From 5944ab246a981d6ceca94b0972345277a746c2d3 Mon Sep 17 00:00:00 2001
From: Priyadi Iman Nurcahyo <priyadi@priyadi.net>
Date: Fri, 10 Feb 2017 21:28:46 +0700
Subject: Implement battery level indicator

---
 keyboards/handwired/promethium/rgbsps.c | 51 ++++++++++++++++++++++++++++++++-
 1 file changed, 50 insertions(+), 1 deletion(-)

(limited to 'keyboards/handwired/promethium/rgbsps.c')

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);
+}
+
-- 
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