Potential All-in-One Single Board Computers

unknown
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15 Feb 2025 02:29 #321609 by unknown

Replied by unknown on topic Potential All-in-One Single Board Computers

Ethercat appears to install ok, some modules are built for the current kernel, some are built for 6.1.0-31-arm64.

With no Ethercat devices connected I get this, would this indicate a good install ?

cnc@raspberrypi:~$ ethercat master
Master0
  Phase: Idle
  Active: no
  Slaves: 0
  Ethernet devices:
    Main: d8:3a:dd:ac:2e:74 (attached)
      Link: UP
      Tx frames:   28884
      Tx bytes:    1733040
      Rx frames:   0
      Rx bytes:    0
      Tx errors:   0
      Tx frame rate [1/s]:    124    124    122
      Tx rate [KByte/s]:      7.3    7.3    7.1
      Rx frame rate [1/s]:      0      0      0
      Rx rate [KByte/s]:      0.0    0.0    0.0
    Common:
      Tx frames:   28884
      Tx bytes:    1733040
      Rx frames:   0
      Rx bytes:    0
      Lost frames: 28884
      Tx frame rate [1/s]:    124    124    122
      Tx rate [KByte/s]:      7.3    7.3    7.1
      Rx frame rate [1/s]:      0      0      0
      Rx rate [KByte/s]:      0.0    0.0    0.0
      Loss rate [1/s]:        124    124    122
      Frame loss [%]:       100.0  100.0  100.0
  Distributed clocks:
    Reference clock:   None
    DC reference time: 0
    Application time:  0
                       2000-01-01 00:00:00.000000000

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rodw
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16 Feb 2025 04:55 #321680 by rodw

Replied by rodw on topic Potential All-in-One Single Board Computers

Yeh, that looks OK. If Ethercat was going to fail due to unsupported kernel, you would not have got that far...

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unknown
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16 Feb 2025 05:52 #321683 by unknown

Replied by unknown on topic Potential All-in-One Single Board Computers

OK that's a good start, all we need is someone to confirm with actual hardware.

The following user(s) said Thank You: rodw

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3404gerber
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27 Apr 2025 07:39 #327132 by 3404gerber

Replied by 3404gerber on topic Potential All-in-One Single Board Computers

The Radxa Zero 3E is a nice small SBC very similar to the Pi Zero but available with more RAM and an ethernet connector. You don't want to use it for step generation, but with the latest Armbian running a 6.12 RT kernel, the latency is ok, especially for a headless motion controller running a servo-thread. Could be interesting for example in a OpenPNP setup. One problem is that USB is not working with current kernel, but this will probably be fixed soon.

Yesterday I ran a G1F1X100 command with 6 TMC5160 connected over SPI @ 6MHz and spidev driver; the servo-thread (reading all 6 position, writing all 6 speed, only one PID) stayed under 0.75 ms for the entire 100 minutes.

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