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i do not post it but i compiled my benchmark to windows also with nearly same results, so the pico is the bottleneck here.

i dont think all functions are able to handled with one pico, i have more time now for testing because the first PCB-s are only shipped on mar.23 and the components is in the coming week.

actually not using PIO now, the UDP data transfer runs on core0 and all io handling runs on the second core, i use the W5100s-evb-pico for the project with the wiznet library (using arduino ide) (for PIO testing i make a frequency generator (later stepgen) and send velocity from 1 of linuxcnc joint to it, it makes 2Mhz signal but dont have a fancy scope to find its jittering. Shock settled on my face, and a small smile appeared at the corner of my mouth when I saw the signal on the scope.

Looks promising. Many LinuxCNC hardware interfaces run at 1kHz, and that works fine for most purposes.
Are you using the PIOs to handle the communications? Maybe there are gains to be made there?

Does the Pi-Pico handle UDP natively?

i make another test this time with raspberry pi4 (4gb)
 

Hi everyone,
I recently ran a benchmark test on my LinuxCNC setup to measure the data request speed, and I thought I’d share the results with you all. I’d love to hear your thoughts or any suggestions for further optimization!
The setup was connected as follows: [Linux 4.19.0-27-rt-amd (core i5) PC (3 byte send 5 byte receive)] -> [switch (TL-SG1005D)] -> [W5100S-Pico]. This was a non-realtime throughput measurement, and the result I got was a stable 2500 requests/second, which I think is pretty solid. I’m curious about your experiences—has anyone else done similar benchmarks, and what do you think of this performance?

Thanks in advance for your input!

 

Fixed title.

unknown wrote:

Dude please don't change the subject, it makes things hard. I check this thread regularly.

I think it is useful to change the title from
"Linuxcnc & the Rpasberry Pi"
to that 
"Linuxcnc & the Raspberry Pi"

Dude please don't change the subject, it makes things hard. I check this thread regularly.

Ok the description is a little vague.

I don't think a clean install will "fix it". I don't think an update would have anything affect as the kernel,kernel modules and firmwares should not be touched during an update. In all honesty unless you are wanting to update Linuxcnc, there shouldn't be a need to do an update, most updates are just minor fixes that really don't affect the way Linuxcnc operates. The biggest "security threat" to cnc machine is someone getting physical access, and it would be the machine it self I would be the most worried about, blood gets everywhere, it's hard to clean and the injured party may want to blame you. I only will have wifi on when transferring files to the cnc machine, other than that I disconnect wifi.

I think you maybe experiencing an issue similar to what is discussed in this thread. Which it would is not Linuxcnc related, it's the ethernet port going to sleep/shutting down, tho it should be tx\rx ing packets more or less continuously. Yes I know it's a direct connection from the Pi to the Mesa card and the thread mentions switches a few times.
forums.raspberrypi.com/viewtopic.php?t=305820

It seems to be somewhat random to which boards are affected but I haven't noticed this on my RPi400.

Tho it might be an idea to check the power supply for the Pi & the mesa card. But if ti was the mesa card "dropping out" you would get notifications.

I installed LinuxCNC onto a RPi 400 with a touchscreen and GMOCCAPY. It works very well, but something has changed on the system and it is now unstable. LinuxCNC, is locking up after periods of inactivity. Running a Mesa 7i96 board. Wonder if doing another clean install will fix it. Might have had a bad update along the way. Will let you know what I discover....

Hi everyone,I've started developing an I/O board using the Raspberry Pi Pico. The prototype will feature 8x 24V outputs and 16x 24V inputs, communicating over Ethernet UDP with a real-time HAL driver. If everything works well, I plan to develop additional boards with step generation, analog outputs, and encoder inputs.At the moment, things are still evolving—I'm currently having the first batch of 5 PCBs manufactured and have already ordered the necessary components. Communication between the Pico and the real-time HAL is already working. :)I'll keep you updated as the project progresses!

Wifi setup is by running

Be sure to edit to choose option 5 "Edit wpa_supplicant" with your country code, ssid & password.

To setup network for a mesa fpga Ethernet card, choose option 6 "Edit interface" and modify eth0 to match post above if you have jumpered the board for "FIXED FROM EEPROM"
If you have jumpered for "FIXED 192.168.1.121" replace 10.10.10.100 with 192.168.1.100.

If your home wifi network is on the 192.168.1 network, use the 10.10.10 network for your Mesa card, refer to you card's manual for jumpers to change.

After config reboot
To check the network type in a terminal
Taken from 7i92 Manual

A final note, there is no network notification applet for the desktop, so you will not get any notifications when the network connects, disconnects or reconnects.

I am new to linuxcnc and I cannot get my Raspberry pi running linuxcnc to connect to wifi or to my mesa 7I92TM board. I tried ip a but the mesa board is not showing have looked everywhere online and read multiple forums but can't seem to find a proper solution to my problem. Please help.

Funny thing is, the Mesa 7c81 and a stacked RPi look like a more compact solution.

NVME would be nice, the RPi5 with a NVME drive is blazingly fast.


Did you stick with the Mesa fpga pin to 7c81 layout ? Or did you change it to make routing easier ?

If you change things around, especially the clock signal, the SPI_CLK for comms is a little tricky to work out to begin with.

Sorry don't mean to add feature creep, man I wish I could design a simple board for the KSZ8851 Ethernet chip for my mesa clone thingy. So hats off to you Old Chap.