RPi4 Mesa install: No 7C81 board found

Today I did a completely new Debian install of the Bookworm daily built, following the document made by rodw:
github.com/rodw-au/linuxcnc/blob/rodw-ge...etting-linuxcnc.adoc

This detailed explanation was very helpful!
After this I manually installed both geany and mesaflash.
I then edited the file "raspi-extra-cmdline" by adding "dtparam=spi=on" (see screenshot below).

I was hoping that this fresh install would solve my problems, but unfortunately I still have the same error...

Although I am happy to hear that 7C81s are shipped with 5ABOBx3 firmware, maybe I don't need to do anything with mesaflesh.
But if I skip that step, how could I check the connection between the RPi and the 7C81? 



 

Is it possible that debian has a different SPI device name?
( does ls /dev | grep spi show anything? )

To test the driver, try

halcmd -kf
halcmd: loadrt hostmot2
halcmd: loadrt hm2_rpspi

Thank you for the quick reply!
Please find below a screenshot with the commands that I executed.

Did not show anything.

This showed "halcmd: " 
I typed "loadrt hostmot2" behind that, which seems to give a valid output.
But when I typed "hm2_rpspi" behind the next "halcmd: " it didn't recognize this command.

cakeslob wrote:

ohhh you are using debian instead of raspi-os. that would explain why things arent working. I do not think you can change things with a config file like with rpi-os or use raspi-config, as debian is not using the dbts. I also dont think the hm2_rpspi driver works with debian bookworm anyways

Unfortunately I am not using raspi-os indeed, because as far as I know the "LinuxCNC 2.8.1 Raspberry Pi OS based on Debian 10 Buster" (which is on the LinuxCNC frontpage) is incompatible with RPi's that have been sold over the past two years...

You left the loadrt out, it should be:

halcmd: loadrt hm2_rpspi
 

I was going off what was said in this git issue about rpi debian
github.com/LinuxCNC/linuxcnc/issues/2349
 

In that thread Sebastian reported that bookworm worked with hm2_rpspi

(but mesaflash did not because the spi device was missing) so it may be OK

PCW wrote:

You left the loadrt out, it should be:

halcmd: loadrt hm2_rpspi

 

Ah, I see I made a mistake over there. However the output of the first and second command don't list anything related to spi, so I think that is already strange?

I did a new try, and after that another one (without rebooting in between), see below. I noticed that the output is different so I pasted both screenshots:

 

 

OK so it does look like you cannot run hm2_rpspi on that kernel
(nor could you run mesaflash or the spidev driver since the spi device driver
is missing)

The "fail to rmmod" error would be simple to fix in the hm2_rpspi source
so it would work with debian systems but overall I look like debian is a lost cause
on the RPI because its missing so much peripheral support