Raspberry Pi 4 with Mesa 7c81

missing space?

Where? I have looked back over this and tried several times

I don’t think that’s it. Is there anything else you can think would result in it not seeing the 7c81. I thought I had it!

Works for me, the error shows that the --addr token is merged with the spi device name so

sudo mesaflash --device 7c81 --addr/dev/spidev0.0 --spi --readhmid
mesaflash: unrecognized option '--addr/dev/spidev0.0'

but

sudo mesaflash --device 7c81 --addr /dev/spidev0.0 --spi --readhmid
open: No such file or directory
No 7C81 board found

Which is the correct result since this PC has no /dev/spidev0.0

I missed the space after addr. My message is now the same as yours except I have a 7c81 connected...

The connection is working as I am able to manually toggle pins using halcmd. (Turning user leds on and off)

I don’t know what to think. Can’t understand why it won’t read the board but nervous as my ultimate goal is to flash it with the g540_x2d configuration

Do you have the latest Mesaflash and LinuxCNC?

There was a problem with earlier versions where running the hm2_rpspi
driver disabled mesaflash until a reboot.

Also how long is your connecting cable (it should be no longer than ~2 inches)