Beginner questions: How i use your lvgl_micropython on ESP32 S2 mini with ili9341

[fabse-hack]

Hello,

Yes, i read already your repo and your instructions how to build it.

i had some (beginner) questions:

here i manage the submodules?
https://github.com/kdschlosser/lvgl_micropython/blob/main/.gitmodules
for example: micropython, it automatic get the newest micropython rom from git? or i have to download my specific micropython version for the build?

How i config the hardware pins from the s2 mini to the ili9431 ? for example: pin8 go to CS ?

Can i use the square line studio (lvgl) for make an graphical design?

how is the process for using lvgl with your tool on my esp32 + display?

1. building the rom
2. flashing the rom
3. ????
4. ????

i thing lvgl is a very big tool for future projects, but right now, there are not many projects out there....

[kdschlosser]

You don't manage anything... It's all done internally in the build script for you...

It's as easy as cloning the repo and compiling. You need to have a C compiler installed.

git clone https://github.com/kdschlosser/lvgl_micropython
cd lvgl_micropython
python3 make.py esp32 submodules mpy_cross clean BOARD=ESP32_GENERIC_S3 BOARD_VARIANT=SPIRAM_OCT --flash-size=32 --oct-flash DISPLAY=ili9341 INDEV=gt911

As an example.

It will handle collecting MicroPython, LVGL and the ESP-IDF. It will set everything up and compile. You will need to have GCC, CMake, Ninja, Make, Git and Python 3.10+ installed prior to running the build script.

[fabse-hack]

ahhh thanks. I think, now i understand it better. For the s2 mini there are determined pins for the displays. I will try it 🤖

[fabse-hack]

Sorry, is me again 😅

I build now the firmware (is easy). And I flashed my esp32 s2 mini.

Can only connect to it, when I press 0 while plug it in....

And can you provide an example lvgl? How I make now a display design with buttons, widgets and so things?

Greetings

[kdschlosser]

Provide me a link to the actual board that you bought. I will look up the information about in on their website and get the information needed to get you up and running.

[fabse-hack]

https://amzn.eu/d/fFkQ2gf

s2 mini .... when i flash it with the normal micropthon, everything is normal, after flashing, the controller appear in the device manager. When i flash it with my lvgl builded version, then not .... :(

[fabse-hack]

...sorry for my late answer :(

[fabse-hack]

ah, for erase it ... i have to press 0 while plug-in the usb cable, then it appears in the device manager

[fabse-hack]

[1/1] cd /home/fabse/lvgl_micropython/lib/micropython/ports/esp32/build-LOLIN_S2_MINI-SPIRAM_OCT/bootloader/esp-idf/esptool_py && /home/fabse/.espressif/python_env/idf5.2_py3.12_env/bin/python /home/fabse/lvgl_micropython/lib/esp-idf/components/partition_table/check_sizes.py --offset 0x8000 bootloader 0x1000 /home/fabse/lvgl_micropython/lib/micropython/ports/esp32/build-LOLIN_S2_MINI-SPIRAM_OCT/bootloader/bootloader.bin
Bootloader binary size 0x48f0 bytes. 0x2710 bytes (35%) free.
[6/7] cd /home/fabse/lvgl_micropython/lib/micropython/ports/esp32/build-LOLIN_S2_MINI-SPIRAM_OCT/esp-idf/esptool_py && /home/fabse/.espressif/python_env/idf5.2_py3.12_env/bin/python /home/fabse/lvgl_micropython/lib/esp-idf/components/partition_table/check_sizes.py --offset 0x8000 partition --type app /home/fabse/lvgl_micropython/lib/micropython/ports/esp32/build-LOLIN_S2_MINI-SPIRAM_OCT/partition_table/partition-table.bin /home/fabse/lvgl_micropython/lib/micropython/ports/esp32/build-LOLIN_S2_MINI-SPIRAM_OCT/micropython.bin
micropython.bin binary size 0x224920 bytes. Smallest app partition is 0x225000 bytes. 0x6e0 bytes (0%) free.
Warning: The smallest app partition is nearly full (0% free space left)!
[7/7] Completed 'bootloader'
Project build complete. To flash, run:
idf.py flash
or
idf.py -p PORT flash
or
python -m esptool --chip esp32s2 -b 460800 --before default_reset --after no_reset write_flash --flash_mode dio --flash_size 4MB --flash_freq 80m 0x1000 build-LOLIN_S2_MINI-SPIRAM_OCT/bootloader/bootloader.bin 0x8000 build-LOLIN_S2_MINI-SPIRAM_OCT/partition_table/partition-table.bin 0x10000 build-LOLIN_S2_MINI-SPIRAM_OCT/micropython.bin
or from the "/home/fabse/lvgl_micropython/lib/micropython/ports/esp32/build-LOLIN_S2_MINI-SPIRAM_OCT" directory
python -m esptool --chip esp32s2 -b 460800 --before default_reset --after no_reset write_flash "@flash_args"
bootloader  @0x001000    18672  (   10000 remaining)
partitions  @0x008000     3072  (    1024 remaining)
application @0x010000  2246944  (    1760 remaining)
total                  2312480
make: Verzeichnis „/home/fabse/lvgl_micropython/lib/micropython/ports/esp32“ wird verlassen

Traceback (most recent call last):
  File "/home/fabse/lvgl_micropython/make.py", line 235, in <module>
    mod.compile(*extra_args)
  File "/home/fabse/lvgl_micropython/builder/esp32.py", line 1233, in compile
    raise RuntimeError('ERROR collecting esptool path')
RuntimeError: ERROR collecting esptool path
fabse@naotimi:~/lvgl_micropython$ python3 make.py esp32 submodules mpy_cross clean BOARD=LOLIN_S2_MINI BOARD_VARIANT=SPIRAM_OCT DISPLAY=ili9341 INDEV=gt911

now i can not build it anymore. Why the make.py want to flash it???? ahhhhh

[kdschlosser]

it isn't flashing it. The make.py script uses the flash tool to combine the 3 binaries the build makes into a single binary file.

[fabse-hack]

okay, thanks. I wonder already, why there is a bootloader.bin and micropython.bin. And now, my next wonder is: why the joining of the single files are failed .... ahhhh

hmmm, i will investigate it tomorrow and write down everything clear for me....

[kdschlosser]

if you run these commands it will flash. The build did succeed omnly the joining of the binary files into a single binary file failed...

cd /home/fabse/lvgl_micropython/lib/micropython/ports/esp32/build-LOLIN_S2_MINI-SPIRAM_OCT
/home/fabse/.espressif/python_env/idf5.2_py3.8_env/Scripts/python -m esptool --chip esp32s2 -b 460800 -p {PORT} --before default_reset --after no_reset write_flash "@flash_args"

replacing "{PORT}" with the port your ESP32 is attached to.

[kdschlosser]

use thew write command I gave you. That is the one that the ESP-IDF spits out. my code doesn't change it.

[fabse-hack]

thanks. Yes, i think now, the builded firmware is working on my controller. But with mpremote i can not copy main.py to the controller.
python.exe -m mpremote connect COM9 cp main.py : is not working .... how i can copy some code to the micropython? or i have to build the firmware with code?

[kdschlosser]

personally I have never used mpremote. I use a highly modified version of ampy which is a python library. So there is not too much I am going to be able to help you with when using mpremote.

one day I will finish a program that I am working on that will create a fake removable drive on a PC allowing you to drag and drop files/folders directly to it. I had started working on it but ran into problems because of the crazy low speed of 115200 that MicroPython has set for the REPL. Now the ability to up the speed exists but in order to do it you have to upload a boot.py file that sets the speed so you still end up being forced to use some other script/program to transfer that file. I can write it into the program to handle that portion if I get to finish up writing the program. It mainly got stalled because of not being able to set the speed and I just haven't gotten the time to go back and finish it since the ability to adjust that was added.

I use the improved speeds with ampy and I am able to get almost 1mbit file transfers. It also transfers in parallel and my plan was to write into the firmware the code that specifically handles the transfer of files instead of having the additional overhead of passing python code along with the data that is being transferred.

[fabse-hack]

thanks. Is still not working. I try now 3 days to get some graphics on the ili9341

With my Lolin S2 mini, i can not connect to REPL --usb-otg is a unknown command for the LOLIN-S2-MINI.
The other controller that i have, lilygo esp32 s2 woor, i not found the right pin-outs for the ili9341....

i'm frustrated ............

//edit: for the Lolin S2 mini i use the command:

python3 make.py esp32 submodules mpy_cross clean BOARD=LOLIN_S2_MINI --flash-size=4 DISPLAY=ili9341 INDEV=gt911 --usb-otg

make: Unbekannte Option »--usb-otg«
unknow option...... without --usb-otg the REPL is not working....

[kdschlosser]

I have to check the MicroPython code for the LOLIN_S2_MINI to see how things are wired up. Give me a day to get that code correct.

It is only me that is working on this project and I do have a life outside of the computer. I am married, and that should about sum it up.. Gotta take time to spend it with the wife and I have things that I have to do around the house. Repairs and remodeling, things like that. The time that I spend writing code is usually at night from 7PM to 4AM or so and that's only when I am not able to sleep (which is 4 out of 5 days. Go to bed at 4:AM fall asleep around 5:00AM wake up at 8AM if i manage to fall asleep at all. Then it's work on the house and do other things like right now I am replacing the engine in a Subaru for a good friend of mine.

I understand your frustration and I am doing the best that I am able to with the time that I have.

[fabse-hack]

hahahahhaaaa 🚀 🚀 🚀 🚀 🚀 🚀 🚀 🚀

[fabse-hack]

what lvgl version do you use in this project?

[fabse-hack]

@kdschlosser do you know SquareLine Studio?

[kdschlosser]

don't use squareline studio it doesn't write correct code for use with this binding.

[fabse-hack]

yes, i have to setup the display etc etc etc .... but for define the widget, is nice 2 have. I plan a project and take out the code snippets.

[fabse-hack]

https://github.com/fabse-hack/temp_humidity_micropython_lvgl/tree/main

is runable, but not yet finish :D

and i don't know if it's 100% correct. I call the lv.task_handler() a few times in some "while True" loops.

still have some questions, for exmaple: How i set the touch pins?

[kdschlosser]

what is the model of your touch IC?

[fabse-hack]

ili9341 with xpt2046 IC

[kdschlosser]

who makes the display board?

[fabse-hack]

Hailege 2,8" ILI9341 240 * 320

is a china display......

[kdschlosser]

OK do you want it to use the same SPI pins as the display is using or do you want the touch to be on it's own set of pins.

I needed to see if the touch controller was broken out to it's own set of pins which is what I am seeing in the schematic for the display.

The choice is yours as far as how you want to connect it. The SPI bus is able to be shared which saves on pins.

[fabse-hack]

hmmm okay, i will try to use this together? so SPI bus with sharing pins.

But i don't know, how the code have to look like. Can you provide me an "hello world" code with the touch pins and the useage with lvgl ?

that would be nice!
I will make a tutorial + youtube video, so maybe we can add my building examples in the readme.md on your repo ?
🚀 😄

[fabse-hack]

finish my project:

https://github.com/fabse-hack/temp_humidity_micropython_lvgl

... is a display for temperature & humidity, with time and MQTT.
@kdschlosser feel free to link it in your repo readme or not .... 🤓

[kdschlosser]

I will do just that...

One thing you might consider doing is packaging it all together... what I mean by that is you have the ability to add files to be frozen into the build and you can create a submodule in your repo for the binding repo. Write a simple makefile that will run the build and package everything into a single binary file. or optionally you can bake your source code into the firmware and release a binary for people to just download and flash .