Setup question

[ErikLambrechts]

Forgive me my lacking understanding of Linux modules. I'm stuck setting up this project. I don't understand the next instruction properly.

This will create ch341-buses.ko, which can the be insmod'ed.

Compile the code works flawlessly and results in the aforementioned ch341-buses.ko file. Using insmod is not clear to me.
As far as I understand, I'm supposed to run

sudo insmod ch341-buses.ko

But this results in the following error,

insmod: ERROR: could not insert module ch341-buses.ko: Invalid module format

Thanks in advance.

[steve-m]

Your insmod command is correct. The most likely cause of the error is that you built the module against the wrong version of Kernel headers.

You can check this with:
modinfo ch341-buses.ko

And the output is something like:
vermagic: 5.15.2-2-MANJARO SMP preempt mod_unload

Maybe you don't have the matching headers installed to the Kernel your system is currently running? Or you have installed Kernel updates but did not reboot your machine yet?

[frank-zago]

Look at the output of dmesg. There might be some error there too.