diff --git a/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp b/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
index 0570079..a9bc531 100644
--- a/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
+++ b/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
@@ -532,9 +532,9 @@ void IRAM_ATTR MatrixPanel_I2S_DMA::updateMatrixDMABuffer(int16_t x_coord, int16
 
 
 /* Update the entire buffer with a single specific colour - quicker */
-void MatrixPanel_I2S_DMA::updateMatrixDMABuffer(uint8_t red, uint8_t green, uint8_t blue)
+bool MatrixPanel_I2S_DMA::updateMatrixDMABuffer(uint8_t red, uint8_t green, uint8_t blue)
 {
-  if ( !initialized ) return;
+  if ( !initialized ) return false;
   
 	/* https://ledshield.wordpress.com/2012/11/13/led-brightness-to-your-eye-gamma-correction-no/ */	 
 #ifndef NO_CIE1931
@@ -585,6 +585,8 @@ void MatrixPanel_I2S_DMA::updateMatrixDMABuffer(uint8_t red, uint8_t green, uint
 
     } while(matrix_frame_parallel_row); // end row iteration
   } // colour depth loop (8)
+  
+  return true;
 } // updateMatrixDMABuffer (full frame paint)
 
 /**
diff --git a/ESP32-HUB75-MatrixPanel-I2S-DMA.h b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
index 065c47c..89dc0a9 100644
--- a/ESP32-HUB75-MatrixPanel-I2S-DMA.h
+++ b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
@@ -425,9 +425,10 @@ class MatrixPanel_I2S_DMA {
     virtual void fillScreen(uint16_t color);                        // overwrite adafruit implementation
 
     /**
-     * A wrapper to fill whatever selected DMA buffer / screen with black
+     * A wrapper to fill whatever selected DMA buffer / screen with black.
+	 * Returns true when operation is completed for syncronisation reasons. 
      */
-    inline void clearScreen(){ updateMatrixDMABuffer(0,0,0); };
+    inline bool clearScreen(){ return updateMatrixDMABuffer(0,0,0); };
 
 #ifndef NO_FAST_FUNCTIONS
     /**
@@ -597,7 +598,7 @@ class MatrixPanel_I2S_DMA {
     void updateMatrixDMABuffer(int16_t x, int16_t y, uint8_t red, uint8_t green, uint8_t blue);
    
     /* Update the entire DMA buffer (aka. The RGB Panel) a certain colour (wipe the screen basically) */
-    void updateMatrixDMABuffer(uint8_t red, uint8_t green, uint8_t blue);       
+    bool updateMatrixDMABuffer(uint8_t red, uint8_t green, uint8_t blue);       
 
     /**
      * wipes DMA buffer(s) and reset all color/service bits