Compile own frozen modules and support for more displays/touch sensors

[ste7anste7an]

Hi,

I succesfully build the lvgl_micropython for an ESP32 with PSRAM. I was able to integrate my own ext_mod by adding the c code directory to /ext_mod and adding an extra rule to micropython.cmake.

Now, I have two questions:

1. How could I build a firmware supporting more than 1 display and/or touch driver (e.g. ili9341 and ft7789 and XT2046 and cst816s)? Can I manually add them just before final compilation, or is there a smarter way?

2. I would like to add some .py modules to be included as frozen modules (.mpy) in the firmware. When I just add them to /lib/micropython/ports/esp32/modules, I do see them endig up in the firmware (when viewing in hexdump), but when using help('modules') they do not show up. How would I get my own forzen modules succesfully integrated?

I like the single make.py that loads, extracts, and build all in one go!

regards,
Stefan

[kdschlosser]

using the DISPLAY, INDEV and EXPANDER build commands are additive. There is also a secret target for those that will add all of the drivers. DISPLAY=all, INDEV=all, EXPANDER=all

if you want to add additional displays simply add more than one DISPLAY={name} to the build command.

as far as adding extension modules you are able to do this without having to add anything to the ext_mod folder. Just add USER_C_MODULE={path to cmake file} to the build command.

If you want to bake external python modules into the firmware use the FROZEN_MANIFEST={path to manifest file} command to add the manifest for those files that you want to bake into the firmware.

[ste7anste7an]

So, all these cases is already taken care of. Great! I will try how it works!

[kdschlosser]

Yes I did plan for people wanting to do this.

let me know if it works or if there is an issue with it working.

[ste7anste7an]

Yes, that worked. I now use this, to also include ulab for microptyhon:

python3 make.py esp32 BOARD=ESP32_GENERIC BOARD_VARIANT=SPIRAM DISPLAY=ili9341 DISPLAY=st7789 INDEV=xpt2046 INDEV=cst816s FROZEN_MANIFEST=manifest.py  USER_C_MODULE=/home/stefan/projects/esp32/lvgl_micropython/micropython-ulab/code/micropython.cmake

[kdschlosser]

You can make a bash script to execute that command so you don't have to key that entire thing in every time you need to compile.

[kdschlosser]

glad to see it is working for you.

I am going to step it up a notch and make some changes to the USER_C_MODULE command. I am going to update it so it will take a git address that can be sued for cloning the repo. Something along these lines.

USER_C_MODULE=https://github.com/v923z/micropython-ulab:code/micropython.cmake

Ill set it up to clone the repo and add the path at the end to the cmake file as a user_c_module.

[kdschlosser]

I added that ability. You can read up on how to use it here....

[ste7anste7an]

I treid using the github repo directly with this command:

python3 make.py esp32 BOARD=ESP32_GENERIC BOARD_VARIANT=SPIRAM DISPLAY=ili9341 DISPLAY=st7789 INDEV=xpt2046 INDEV=cst816s FROZEN_MANIFEST=manifest.py USER_C_MODULE=https://github.com/v923z/micropython-ulab:code/micropython.cmake

Which resulted in this error:

Traceback (most recent call last):
  File "/home/stefan/projects/esp32/lvgl_micropython/make.py", line 303, in <module>
    extra_args, lv_cflags, board = mod.parse_args(extra_args, lv_cflags, board)
  File "/home/stefan/projects/esp32/lvgl_micropython/builder/esp32.py", line 565, in parse_args
    extra_args = common_args(extra_args)
  File "/home/stefan/projects/esp32/lvgl_micropython/builder/esp32.py", line 458, in common_args
    ['cd', f'ext_mod']
TypeError: list indices must be integers or slices, not tuple

Using the abolute path works fine though.

[kdschlosser]

all fixed. I missed adding a comma. simple issue to fix.