Merge pull request #1067 from UltimateHackingKeyboard/fade_rgb

Fade uhk80 leds gradually.
UltimateHackingKeyboard · Dec 27, 2024 · eb12223 · eb12223
2 parents ca6d687 + 930c4e5
commit eb12223
Showing 1 changed file with 35 additions and 3 deletions.
diff --git a/device/src/keyboard/leds.c b/device/src/keyboard/leds.c
@@ -33,6 +33,10 @@ void setLedsCs(bool state)
 
 static volatile bool ledsNeedUpdate = false;
 
+static uint8_t currentScaling = 0;
+static uint8_t scalingFadeStep = 5;
+static uint8_t scalingFadeDelay = 10;
+
 static void setOperationMode(bool on) {
     // Set software shutdown control (SSD) register to normal mode
     setLedsCs(true);
@@ -52,13 +56,36 @@ static void sleepLeds() {
     }
 }
 
+static void recalculateScaling() {
+    if (currentScaling == KeyBacklightBrightness) {
+        return;
+    }
+
+    if (currentScaling < KeyBacklightBrightness) {
+        if (currentScaling < KeyBacklightBrightness && KeyBacklightBrightness - currentScaling >= scalingFadeStep) {
+            currentScaling += scalingFadeStep;
+        } else {
+            currentScaling = KeyBacklightBrightness;
+        }
+    }
+
+    if (currentScaling > KeyBacklightBrightness) {
+        if (currentScaling > KeyBacklightBrightness && currentScaling - KeyBacklightBrightness >= scalingFadeStep) {
+            currentScaling -= scalingFadeStep;
+        } else {
+            currentScaling = KeyBacklightBrightness;
+        }
+    }
+}
+
 void ledUpdater() {
     k_sleep(K_MSEC(100));
     while (true) {
         k_mutex_lock(&SpiMutex, K_FOREVER);
 
         setOperationMode(1);
 
+
         // Set 180 degree phase delay to reduce audible noise, although it doesn't seem to make a difference
         setLedsCs(true);
         writeSpi(LedPagePrefix | 2);
@@ -91,7 +118,7 @@ void ledUpdater() {
         writeSpi(LedPagePrefix | 1);
         writeSpi(0x00);
         for (int i=0; i<255; i++) {
-            writeSpi(KeyBacklightBrightness);
+            writeSpi(currentScaling);
         }
         setLedsCs(false);
 
@@ -101,11 +128,16 @@ void ledUpdater() {
             k_sleep(K_FOREVER);
         }
 
-        if (KeyBacklightBrightness == 0) {
+        if (currentScaling == 0 && KeyBacklightBrightness == 0) {
             sleepLeds();
         }
 
-        ledsNeedUpdate = false;
+        if (currentScaling != KeyBacklightBrightness) {
+            k_sleep(K_MSEC(scalingFadeDelay));
+            recalculateScaling();
+        }
+
+        ledsNeedUpdate = currentScaling != KeyBacklightBrightness;
     }
 }