Add ESP32 port + drivers

[amirgon]

Add ESP32 port + ILI9341 driver + Resistive Touch driver, and an example on lv_micropython of integrating it all into a Micropython project.

[amirgon]

Update

Added support for ESP32 ILI9341.
Also updated lv_micropython project to build and register it.
Added usage examples and build command line to README.md.

Next - resistive touch driver.

[kisvegabor]

I tried to test the new version on ESP32. It compiled well using the instructions from the Readme. However, I didn't find how to flash the compiled binary to the ESP32.

Can you help with that?

[amirgon]

I tried to test the new version on ESP32. It compiled well using the instructions from the Readme. However, I didn't find how to flash the compiled binary to the ESP32.

Can you help with that?

Yes.
I build and flash it with:

make -C ports/esp32/ ESPIDF=~/esp/projects/lv_mpy_deps/esp-idf -j4 LV_CFLAGS="-DLV_HOR_RES=240 -DLV_VER_RES=320 -DLV_COLOR_DEPTH=16" deploy

The deploy target at the end uses esptool to flash it through USB.
You need esptool installed (I think it comes with the standard esp-idf installation, or you can install it separately).
You will also need to have user permissions to access the /dev/ttyUSB0 device. On Linux, you can enable this by adding your user to the dialout group, and rebooting or logging out and in again.

In general, just follow the instructions in ESP32 README.

[kisvegabor]

I see, thank you!

Somehow I couldn't compile it again. But when I changed the IDF version accorfing to the build log it compiled.

> make -C ports/esp32/ ESPIDF=~/esp/esp-idf LV_CFLAGS="-DLV_HOR_RES=320 -DLV_VER_RES=240 -DLV_COLOR_DEPTH=16" 

Current git hash:   44b97b7fe7e0f2612de467541b92e93abece5c87
Supported git hash: 30545f4cccec7460634b656d278782dd7151098e

I registered the display as you described in the README and it was working well!
Congratulation! 👏 👏 👏

[amirgon]

I registered the display as you described in the README and it was working well!
Congratulation!

Great!! 😄 Thanks for trying it out.

[amirgon]

Added resistive touch driver.
Updated advanced_demo.py example.

Closing.