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phillc54 wrote:

I have not used a Pi with LinuxCNC for some time now. From memory the most success that I did have was when using a Pi4 with images made by elovalvo from this forum. I seem to recall seeing him mention an image here recently.

You can find the references here:

forum.linuxcnc.org/9-installing-linuxcnc...xcnc?start=20#287208

forum.linuxcnc.org/9-installing-linuxcnc...b-pi?start=20#288227

im also confused about that. Is that a random error or could I have mixed up my linuxcnc OS with the raspberry pi version? I ran "sudo dpkg --purge raspi-firmware" and still doesnt launch.

Which method did you use to install Linuxcnc?
Have you noticed any issues with screen resolution?

Performance of the 5 seems amazing so far when stress tested and latency checked. Irrelevant as I have a mesa card but damn it seems like an easy solution for most people so far.

tomorrow ill try reinstalling linux with version 2.8.2, and testing it out on a raspberry pi 4. I understand my latency is worse than what you showed but only by 3-4x. I hope that linuxcnc would have some tolerance without freaking out over a small difference? at least to connect and start the program.

Username & password are here
forum.linuxcnc.org/9-installing-linuxcnc...-400?start=10#281922

Also mentioned here
forum.linuxcnc.org/9-installing-linuxcnc...ds-login-info#288644

To be fair on the sticky for the image rod did mention the username & password on the 2nd reply on the second page.

Yes it should be on the downloads page. I did ask.
user cnc
pw cnc
to configure wifi time zone etc type sudo menu-config

If you look at the original thread the login info is there, but yeah it would be a good idea.

Due to the build system the config.txt and other files are a subfolder of /boot, which are quite easy to find if you look in the /boot folder.

Maybe there should be mention that the directory structure is a little different to s standard Raspberry Pi OS, but I'm pretty sure it's also mentioned there, it's been a while since Rod and myself started developing this image, Rod deserves the real credit as he was bouncing ideas off my head and such. Also he's not as flakey as I am hahaha

I have spent all day trying to get my Raspberry Pi 4 to allow me to log in with the Raspberry Pi Debian Bookworm 2.9.1 image because the documentation does not include any username and password, and it seems (after hours of trying) incompatible with the Raspberry Pi `/boot` drive `userconf.txt`.

Can someone please update the downloads page to include that information since it's hardcoded as username and password of `cnc`? Huge miss!

Hi,
Firstly, I chose Pathpilot purely because I wanted the Pathpilot interface. I’m not saying it is better than others, but it suits my workflow and the way I do things. 

I am also (as a secondary project setting up LinuxCNC on a Raspberry Pi which will use the probe basic UIF.

As to setting up PathPilot, it needs a motion controller attached to start. When you select the Tormach machine, PathPilot try’s to communicate with the expected Mesacard, then downloads the firmware if it isn’t what PathPilot expects.

So, most people choose a Tormach machine that matches the Mesacard they have and a machine that is “similar” to what they want to achieve. You then, have to edit the .hal and .ini files for that machine to suit your non-Tormach machine. Every time you do a PathPilot update, these two files will be overwritten.

The best way around it is to have a backup copy of these to files in the same directory as they won’t be overwritten. I also changed the startup script so that it points to my .hal and .ini files.

The model 1100-3 is a common choice that many use. I chose the 440 as it uses a Leadshine MX4660 controller that has an identical db25 interface to the Gecko G540 that I use.

Read through the thread I wrote on getting my machine to work on Pathpilot. It should explain how I did it.
forum.linuxcnc.org/pathpilot/45846-pathpilot-7i92-g540-hal-file

I hope it helps. 

cheers
Peter

Sorry mate I didn't realise that you got the hal_gpio module working.

rufino wrote:

I would like some help installing linuxcnc for raspberry pi 5. How to configure the hal file to access gpio in version 5. Does anyone have a working model hal file for the raspberry pi5 and could share it with me?

Have you tried what I wrote here?

forum.linuxcnc.org/9-installing-linuxcnc...-pi-5?start=0#285243

PCW wrote:

For best signal integrity, (and highest SPI clock rate) you need to
use every ground and power connection on the RPI, or ground
bumping between the RPI and the FPGA card will result in very
poor signal integrity. This is why the 7C80 and 7C81 use the
complete 40 pin connector and connect all grounds plus bypass all
3.3V and 5V RPI power connections on the FPGA card.
 

Hi PCW,

I am a new user in the LinuxCNC forums and am looking to convert my previous GRBL machine to run LinuxCNC via Raspberry Pi4, Mesa 7C81 and 7I78 step/dir daughter card. Could you please elaborate a bit on the design of the 7C81?

As far as I've read the 3,3V supply pins from the RPi4 are not used at the 7C81 side or am I mistaken? Most GPIOs aren't used at the 7C81, correct? Only the SPI capable pins are really used to communicate, right?

I am used to powering my RPi4s vie the USB-C connector as there is circuitry on the input side to prevent overvoltage (to some degree), but not via the GPIO-pins and I was wondering if there is any benefit to not connect the Vcc pins (5V and 3.3V I mean)? I thought to only connect every GND pin and the SPI pins to reference GND properly between boards and maybe protect the RPi4 with the included overvoltage circuitry.

If I understand your previous statement correctly my suggested connection method is what you meant by ground bumping, right?

How are the 3.3V and 5V pins bypassed on the FPGA? If the power supply can handle it should I maybe not power the 7C81 via the TB1 (and/or TB2) but only via the USB-C? Is there overvoltage protection on the 7C81 that makes it safe to use the GPIOs as VCC input for the RPi4? Would there be a downside to power both boards in parallel if the same power supply is connected (and capable of doing so)?

Sorry if I'm asking too much at once, but I'm a little excited to get into LinuxCNC

Kind regards,
Klaus

Aw crap, it IS the monitor. Well, HDMI cable