From cf8cb970e95a08a4b44a7b917775d158f6e2501d Mon Sep 17 00:00:00 2001
From: mrfaptastic <12006953+mrfaptastic@users.noreply.github.com>
Date: Tue, 16 Feb 2021 20:20:09 +0000
Subject: [PATCH] Minor changes

---
 ESP32-HUB75-MatrixPanel-I2S-DMA.cpp           |  3 +-
 ESP32-HUB75-MatrixPanel-I2S-DMA.h             |  5 +-
 .../DoubleBufferSwap/DoubleBufferSwap.ino     | 55 +++++++++++--------
 3 files changed, 34 insertions(+), 29 deletions(-)

diff --git a/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp b/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
index 89f24ae..b7dc8b0 100644
--- a/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
+++ b/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
@@ -100,10 +100,11 @@ bool MatrixPanel_I2S_DMA::allocateDMAmemory()
         
         Serial.println(F("DMA memory blocks available before any malloc's: "));
         heap_caps_print_heap_info(MALLOC_CAP_DMA);
-        
+		Serial.println(F("******************************************************************"));
         Serial.printf_P(PSTR("We're going to need %d bytes of SRAM just for the frame buffer(s).\r\n"), _frame_buffer_memory_required);  
         Serial.printf_P(PSTR("The total amount of DMA capable SRAM memory is %d bytes.\r\n"), heap_caps_get_free_size(MALLOC_CAP_DMA));
         Serial.printf_P(PSTR("Largest DMA capable SRAM memory block is %d bytes.\r\n"), heap_caps_get_largest_free_block(MALLOC_CAP_DMA));          
+		Serial.println(F("******************************************************************"));	    
 		
     #endif
 
diff --git a/ESP32-HUB75-MatrixPanel-I2S-DMA.h b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
index e1c1067..83c43dd 100644
--- a/ESP32-HUB75-MatrixPanel-I2S-DMA.h
+++ b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
@@ -67,9 +67,6 @@
 
 /***************************************************************************************/
 /* Do not change definitions below unless you pretty sure you know what you are doing! */
-#ifndef ESP32_I2S_CLOCK_SPEED
-  #define ESP32_I2S_CLOCK_SPEED       (10000000UL)            // @ 10Mhz
-#endif
 
 // RGB Panel Constants / Calculated Values
 #ifndef MATRIX_ROWS_IN_PARALLEL
@@ -233,7 +230,7 @@ struct  HUB75_I2S_CFG {
   /**
    * I2S clock speed selector
    */
-  enum clk_speed {HZ_10M=10000000, HZ_13340K=13340000, HZ_16M=16000000, HZ_20M=20000000, HZ_26670K=26670000};
+  enum clk_speed {HZ_10M=10000000, HZ_20M=20000000};
 
   // Structure Variables
 
diff --git a/examples/DoubleBufferSwap/DoubleBufferSwap.ino b/examples/DoubleBufferSwap/DoubleBufferSwap.ino
index 81e116d..76e2ea2 100644
--- a/examples/DoubleBufferSwap/DoubleBufferSwap.ino
+++ b/examples/DoubleBufferSwap/DoubleBufferSwap.ino
@@ -10,8 +10,8 @@
  * for different resolutions / panel chain lengths within the sketch 'setup()'.
  * 
  */
-MatrixPanel_I2S_DMA     display(true);      // Note the TRUE -> Turns of secondary buffer - "double buffering"!
-                                                    // Double buffering is not enabled by default with the library.
+
+MatrixPanel_I2S_DMA *display = nullptr;
 
 const byte row0 = 2+0*10;
 const byte row1 = 2+1*10;
@@ -26,30 +26,37 @@ void setup()
 
   Serial.println("...Starting Display");
   
-  display.begin();  // setup display with pins as per defined in the library
-  display.setTextColor(display.color565(128, 128, 128));  
+  HUB75_I2S_CFG mxconfig;
+  mxconfig.double_buff = true; // Turn of double buffer
+
+  // OK, now we can create our matrix object
+  display = new MatrixPanel_I2S_DMA(mxconfig);  
+  
+  
+  display->begin();  // setup display with pins as per defined in the library
+  display->setTextColor(display->color565(255, 255, 255));  
 
   
   // Buffer 0 test
-  display.fillScreen(display.color565(128, 0, 0));  
-  display.setCursor(3, row0);
-  display.print(F("Buffer 0"));
-  display.setCursor(3, row1);
-  display.print(F(" Buffer 0"));
+  display->fillScreen(display->color565(128, 0, 0));  
+  display->setCursor(3, row0);
+  display->print(F("Buffer 0"));
+  display->setCursor(3, row1);
+  display->print(F(" Buffer 0"));
   Serial.println("Wrote to to Buffer 0");
-  display.showDMABuffer(); 
+  display->showDMABuffer(); 
   delay(1500);
   
   // Buffer 1 test
-  display.flipDMABuffer();
-  display.fillScreen(display.color565(0, 128, 0)); // shouldn't see this
-  display.setCursor(3, row0);
-  display.print(F("Buffer 1"));
-  display.setCursor(3, row2);
-  display.print(F(" Buffer 1"));
+  display->flipDMABuffer();
+  display->fillScreen(display->color565(0, 128, 0)); // shouldn't see this
+  display->setCursor(3, row0);
+  display->print(F("Buffer 1"));
+  display->setCursor(3, row2);
+  display->print(F(" Buffer 1"));
  
   Serial.println("Wrote to to Buffer 1");
-  display.showDMABuffer();  
+  display->showDMABuffer();  
   delay(1500);
 
 }
@@ -57,31 +64,31 @@ void setup()
 void loop() {
   
   // Flip the back buffer
-  display.flipDMABuffer();
+  display->flipDMABuffer();
 
   // Write: Set bottow row to black
   for (int y=20;y<MATRIX_HEIGHT; y++)
   for (int x=0;x<MATRIX_WIDTH; x++)
   {
-    display.drawPixelRGB888( x, y, 0, 0, 0);
+    display->drawPixelRGB888( x, y, 0, 0, 0);
   }
 
   // Write:  Set bottom row to blue (this is what should show)
   for (int y=20;y<MATRIX_HEIGHT; y++)
   for (int x=0;x<MATRIX_WIDTH; x++)
   {
-    display.drawPixelRGB888( x, y, 0, 0, 64);
+    display->drawPixelRGB888( x, y, 0, 0, 64);
   }
 
   // Now show this back buffer
-  display.showDMABuffer();  
+  display->showDMABuffer();  
   delay(1000);
 
   // Flip back buffer
-  display.flipDMABuffer();   
+  display->flipDMABuffer();   
 
   // Show this buffer
-  display.showDMABuffer();   
+  display->showDMABuffer();   
   delay(1000); 
 
-}
+}
\ No newline at end of file