Can raspberry Pi be replaced?

thanhtam-h / soem-w5500-rpi

Realtime ethercat master for Raspberry pi

GNU General Public License v3.0

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Can raspberry Pi be replaced? #4

Closed littleggghost closed 6 years ago

littleggghost commented 6 years ago

Hi, Tam Your blog and experiment are really awesome and thanks to your share. Now I have a question here: Can raspberry Pi be replaced by normal linux PC, no matter in ARM platform or in Intel platform? I mean that the EtherCAT master should run on realtime linux environment and is irrelevant to the platform. Then I can do this same experiment using my laptop computer with linux+xenomai. Hope for your reply. Best regards!

thanhtam-h commented 6 years ago

Absolutely, Laptop with Intel CPU is the easiest way to implement Linux+Xenomai+EtherCAT master. If your laptop has Intel e1000e or Realtex R8169 (very popular) NIC families, you are almost ready to go. You can select:

IgH EtherCAT Master which already had native driver for e1000e, r8169
SOEM plus RTnet. RTnet also has realtime drivers for e1000e and r8169 (and several others) Since this is fundamental solution, so you can check yourself. For other ARM platforms, it's case by case. As I mentioned in my blog, most critical issue is realtime capable driver for NIC. So far, RTnet has realtime drivers for CPSW (on Beaglebone Black) and FEC (on iMX6). Search for them if this were your case.

rxdu commented 6 years ago

It seems RTnet hasn't been updated for a long time and the supported Linux kernel is 2.6.x and 2.4.x.(http://www.rtnet.org/doc.html) Does this library still work with more recent kernels and Xenomai 3? Or if there is a newer version of RTnet somewhere else?

littleggghost commented 6 years ago

@thanhtam-h Firstly, thanks for your quickly reply. But I can't run RTnet successfully with Xenomai3+linux kernel 4.9.38. My main reference is from lwr Do you have any good study source for configuring RTnet?

thanhtam-h commented 6 years ago

@rxdu @littleggghost , I am pretty sure that RTNet works well for any Xenomai and Linux kernel version. In Xenomai 3.x, RTnet is integrated as a 'net' part. Sorry friends, RTnet is out of scope of this project, you may need to look around other places for solution

littleggghost commented 6 years ago

Thank you anyway for your reply.

rxdu commented 6 years ago

@thanhtam-h Thank you for sharing your experience. That's very helpful.