LVGL support

[AnatolSher]

Hello! Today I will tell you how to use LVGL in your arduino projects simply.

You must take a few steps:

1. Update your W80x Arduino core from the repo https://github.com/board707/w80x_arduino/tree/hal-v0.6.0
2. Download the LVGL library through the library manager in the Arduino IDE
   
3. Prepare LVGL for work according to the instructions: https://docs.lvgl.io/latest/en/html/get-started/arduino.html#configure-lvgl excluding the steps 4 & 5.
4. Run test example w80x_test_lvgl.ino

Enjoy!

[AnatolSher]

Let's check the performance of LVGL
To do this, insert the header file in w80x_test_lvgl.ino
#include "demos/lv_demos.h"
Don't forget to follow the recommendation
You also need to copy lvgl/examples to lvgl/src/examples. Similarly for the demos lvgl/demos to lvgl/src/demos.
In lv_conf.h set parameter
/Benchmark your system/
#define LV_USE_DEMO_BENCHMARK 0 to 1
Commenting out a block of code
/* Create simple label */
Add a function call
lv_demo_benchmark();
And you can see how slowly it works. :)
It's not a problem! The bottleneck is the screen driver and the drawing method written in the my_disp_flush() function.

Let's start optimization...

[AnatolSher]

Optimized version will be in repo soon.