1 files changed, 73 insertions, 0 deletions
diff --git a/keyboards/handwired/promethium/rgbsps.c b/keyboards/handwired/promethium/rgbsps.c
new file mode 100644
index 0000000000..f30badd356
--- /dev/null
+++ b/keyboards/handwired/promethium/rgbsps.c
@@ -0,0 +1,73 @@
+#include "light_ws2812.h"
+#include "rgbsps.h"
+
+struct cRGB led[RGBSPS_NUM];
+
+void rgbsps_set(uint8_t index, uint8_t r, uint8_t g, uint8_t b) {
+  led[index].r = r;
+  led[index].g = g;
+  led[index].b = b;
+}
+
+void rgbsps_setall(uint8_t r, uint8_t g, uint8_t b) {
+  for (uint16_t i = 0; i < RGBSPS_NUM; i++) {
+    rgbsps_set(i, r, g, b);
+  }
+}
+
+void rgbsps_turnoff(void) {
+  rgbsps_setall(0, 0, 0);
+}
+
+void rgbsps_send(void) {
+  ws2812_setleds(led, RGBSPS_NUM);
+}
+
+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);
+}
+