LEDOutput add display() method to be consistent with UNO

Author: pschatzmann

src/AudioLibs/LEDOutput.h

@@ -113,6 +113,8 @@ class LEDOutput {
     if (cfg.update_callback != nullptr && count++ % cfg.update_frequency == 0) {
       // use custom update logic defined in config
       cfg.update_callback(&cfg, this);
+    } else {
+      display();
     }
   }
 
@@ -183,6 +185,11 @@ class LEDOutput {
     return max;
   }
 
+  /// Update the led_matrix (calling FastLED.show();
+  void display() {
+    FastLED.show();
+  }
+
   /// Provides acces to the FFTDisplay object
   FFTDisplay &fftDisplay() { return *p_fft; }
 

src/AudioLibs/LEDOutputUnoR4.h

@@ -78,6 +78,8 @@ class LEDOutputUnoR4 {
     if (cfg.update_callback != nullptr && count++ % cfg.update_frequency == 0) {
       // use custom update logic defined in config
       cfg.update_callback(&cfg, this);
+    } else {
+      display();
     }
   }