Thanks Sam,
I'll check it out.  Just got out of the shop.  I remove the PC and plugged the 
Pi4 back into the system.  Homed, then G0 X0 Y0 Z0 A0,  after that ran a G-Code 
that cut a spiral.  All nice and smooth and quiet with the servos.
Closed LinuxCNC.  Then into terminal and cd ~/mesaflash.  Same thing.

pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92 --readhmid
lbp16_access.send_packet: Resource temporarily unavailable
Aborted

I'll check your link.   Has to be something really simple I think.  The fact 
that the mesaflash compiles and runs on a PC and a BeagleBone (that I didn't 
expect) suggests to me the problem isn't with mesaflash.

...

OK.
Static ip_address=192.168.1.1

I don't have the /24 but my 7i92 is 192.168.1.121 and the fact that I can use 
the CNC suggest all is good.

I can try adding that /24 to see if it makes a difference but first I'd like to 
know why it's needed.
...
No change.  LinuxCNC still moves things.  But mesaflash comes up with the same 
error.

John



> -----Original Message-----
> From: Sam Sokolik [mailto:samco...@gmail.com]
> Sent: June-11-21 12:19 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Pi4 issues with MESA 7i92H
> 
> I just used mesaflash the other day on the rpi4 for the 7i92.   It has been
> a while but I think I followed the network directions here...
> 
> https://gnipsel.com/linuxcnc/uspace/rpi4-eth.html
> 
> On Fri, Jun 11, 2021, 12:58 AM Ralph Stirling <ralph.stirl...@wallawalla.edu>
> wrote:
> 
> > Did you set a static ip for the pi in /etc/dhcpcd.conf?  It worked for me
> > after I did this.
> >
> > -- Ralph
> >
> > On Jun 10, 2021 8:02 PM, John Dammeyer <jo...@autoartisans.com> wrote:
> > CAUTION: This email originated from outside the Walla Walla University
> > email system.
> >
> >
> > Peter Wallace and I have been working on getting the Pi4 to work with the
> > 7i92 mesaflash program.
> >
> > He asked me to do this but I get the error below.
> > pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92 --readhmid
> > lbp16_access.send_packet: Resource temporarily unavailable
> > Aborted
> >
> > When I do this on the PC with the same 7i92 it dumps the Pins table.  The
> > 7i92 is communicating with the board.  It can ping it.  It can detect what
> > type of board it is.  But the --readhmid parameter always returns this
> > access.send_packet error.
> >
> > Any ideas on how to solve this problem?  It appears to be some sort of
> > network issue.  The Pi4 has successfully run my CNC hardware through the
> > 7i92 so Ethernet works.  At least from LinuxCNC to the Pi.   Clearly not
> > from the mesaflash to the pi.
> >
> > To get mesaflash onto the Pi4 you have to do the following.
> > pi@linuxcnc:~ $ sudo git clone
> >
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgithub.com%2Flinuxcnc%2Fmesaflash&amp;data=04%7C01
> %7Cralph.stirling%40wallawalla.edu%7C4f063130e6174fe6087c08d92c856741%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0
> %7C637589773748714746%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6M
> n0%3D%7C1000&amp;sdata=yZ4IL4wTuuULCOB%2Fg9S9T3q2E1szCUPkKe5gaC2oIoc%3D&amp;reserved=0
> > pi@linuxcnc:~/mesaflash $ sudo apt-get install libpci-dev
> > pi@linuxcnc:~/mesaflash $ sudo make
> >
> > Once that's all done:
> > pi@linuxcnc:~/mesaflash $ ./mesaflash
> > Mesaflash version 3.4.0~pre1
> > Configuration and diagnostic tool for Mesa Electronics
> > PCI(E)/ETH/EPP/USB/SPI boards
> > Try 'mesaflash --help' for more information
> > pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92 --addr
> > 192.168.1.121
> > ETH device 7I92 at ip=192.168.1.121
> >
> > Any suggestions are welcome.
> > Thanks
> > John Dammeyer
> >
> >
> > "ELS! Nothing else works as well for your Lathe"
> > Automation Artisans Inc.
> > www dot autoartisans dot com
> >
> >
> > _______________________________________________
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> >
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