start off commit

examples/aspect_kbv/aspect_kbv.ino

@@ -0,0 +1,40 @@
+#include <Adafruit_GFX.h> // Hardware-specific library
+#include <MCUFRIEND_kbv.h>
+MCUFRIEND_kbv tft;
+
+void setup()
+{
+    // put your setup code here, to run once:
+    Serial.begin(9600);
+    tft.reset();
+    uint16_t identifier = tft.readID();
+    Serial.print("ID = 0x");
+    Serial.println(identifier, HEX);
+    if (identifier == 0xEFEF) identifier = 0x9486;
+    tft.begin(identifier);
+    //  tft.fillScreen(BLACK);
+}
+
+char *msg[] = { "PORTRAIT", "LANDSCAPE", "PORTRAIT_REV", "LANDSCAPE_REV" };
+uint8_t aspect;
+
+void loop()
+{
+    // put your main code here, to run repeatedly:
+    uint16_t x = 50, y = 100;
+    tft.setRotation(aspect);
+    tft.fillScreen(0x0000);
+    tft.setCursor(0, 0);
+    tft.setTextSize(2);
+    tft.println(msg[aspect]);
+    tft.setCursor(x, y);
+    tft.println("[x=" + String(x) + ",y=" + String(y) + "]");
+    delay(5000);
+    tft.println("INVERT ON");
+    tft.invertDisplay(true);
+    delay(1000);
+    tft.invertDisplay(false);
+    tft.println("INVERT OFF");
+    delay(1000);
+    if (++aspect >= 4) aspect = 0;
+}