Merge branch 'dev' of https://github.com/SolderedElectronics/Inkplate-Arduino-library into dev

Author: KarloLeksic

examples/Inkplate4/Diagnostics/Inkplate4_Burn_In_Clean/Inkplate4_Burn_In_Clean.ino

@@ -0,0 +1,56 @@
+/*
+   Inkplate4_Burn_In_Clean example for Soldered Inkplate 4
+   For this example you will need only USB cable and Inkplate 4.
+   Select "Soldered Inkplate4" from Tools -> Board menu.
+   Don't have "Soldered Inkplate4" option? Follow our tutorial and add it:
+   https://soldered.com/learn/add-inkplate-6-board-definition-to-arduino-ide/
+
+   This example will try to remove heavy burn-in visible on the panel.
+   Set number of refresh / clear cycles and upload the program.
+
+   Want to learn more about Inkplate? Visit www.inkplate.io
+   Looking to get support? Write on our forums: https://forum.soldered.com/
+   12 January 2022 by e-radionica.com
+*/
+
+// Next 3 lines are a precaution, you can ignore those, and the example would also work without them
+#ifndef ARDUINO_INKPLATE4
+#error "Wrong board selection for this example, please select Soldered Inkplate4 in the boards menu."
+#endif
+
+#include "Inkplate.h" //Include Inkplate library to the sketch
+Inkplate display;     // Create object on Inkplate library
+
+// Nubmer of clear cycles.
+#define CLEAR_CYCLES 5
+
+// Delay between clear cycles (in milliseconds)
+#define CYCLES_DELAY 5000
+
+void setup()
+{
+    display.begin();        // Init library (you should call this function ONLY ONCE)
+    display.clearDisplay(); // Clear any data that may have been in (software) frame buffer.
+
+    int cycles = CLEAR_CYCLES;  // Set the number of clear cycles
+    
+    // Clean it by writing clear sequence to the panel.
+    while (cycles)
+    {
+        cycles--;
+        display.display();
+        delay(CYCLES_DELAY);
+    }
+        
+    // Print text when clearing is done.
+    display.setTextSize(4);
+    display.setCursor(30, 130);
+    display.setTextColor(INKPLATE_RED, INKPLATE_WHITE);
+    display.print("Clearing done.");
+    display.display();
+}
+
+void loop()
+{
+    // Empty...
+}