feat(example): make "LVGL_Arduino.ino" easier to use (#6001)

examples/arduino/LVGL_Arduino/LVGL_Arduino.ino

@@ -1,5 +1,5 @@
 /*Using LVGL with Arduino requires some extra steps:
- *Be sure to read the docs here: https://docs.lvgl.io/master/get-started/platforms/arduino.html  */
+ *Be sure to read the docs here: https://docs.lvgl.io/master/integration/framework/arduino.html  */
 
 #include <lvgl.h>
 
@@ -15,9 +15,10 @@
 //#include <examples/lv_examples.h>
 //#include <demos/lv_demos.h>
 
-/*Set to your screen resolution*/
+/*Set to your screen resolution and rotation*/
 #define TFT_HOR_RES   320
 #define TFT_VER_RES   240
+#define TFT_ROTATION  LV_DISPLAY_ROTATION_0
 
 /*LVGL draw into this buffer, 1/10 screen size usually works well. The size is in bytes*/
 #define DRAW_BUF_SIZE (TFT_HOR_RES * TFT_VER_RES / 10 * (LV_COLOR_DEPTH / 8))
@@ -95,6 +96,8 @@ void setup()
 #if LV_USE_TFT_ESPI
     /*TFT_eSPI can be enabled lv_conf.h to initialize the display in a simple way*/
     disp = lv_tft_espi_create(TFT_HOR_RES, TFT_VER_RES, draw_buf, sizeof(draw_buf));
+    lv_display_set_rotation(disp, TFT_ROTATION);
+
 #else
     /*Else create a display yourself*/
     disp = lv_display_create(TFT_HOR_RES, TFT_VER_RES);