Mesa 7i96 Ethernet board

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09 Jun 2017 12:44 #94333 by PCW
Replied by PCW on topic Mesa 7i96 Ethernet board
Mesa Ethernet cards need the uspace version of LinuxCNC and a Preempt-RT kernel, Heres. one way to do this:

linuxcnc.org/docs/html/getting-started/g...th_preempt_rt_kernel

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09 Jun 2017 12:50 #94335 by tecno
Replied by tecno on topic Mesa 7i96 Ethernet board
Manual says

The 7I76Es outputs can drive loads of up to 350 mA.

Is this 350mA each output?

Cheers
Bengt

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09 Jun 2017 13:03 #94336 by PCW
Replied by PCW on topic Mesa 7i96 Ethernet board
Its a bit complex because the driver chips have 8 outputs per chip
and the chip will dissipate too much heat if all outputs are loaded with 350 mA

The individual output limit is 350 mA, but there's also a limit of 1.4A per chip
(8 consecutive outputs)

Also any inductive load that draws more than 60 mA needs a flyback diode

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09 Jun 2017 13:05 #94338 by tecno
Replied by tecno on topic Mesa 7i96 Ethernet board
Thanks for the clarification.

Cheers
Bengt

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09 Jun 2017 13:34 #94343 by microsprintbuilder
Ah, I missed that, Did that, Now I get this. Did I miss something else?

stever@debian-LP:~$ halrun
halcmd: loadrt hostmot2
Note: Using POSIX realtime
hm2: loading Mesa HostMot2 driver version 0.15
halcmd: loadrt hm2_eth board_ip=192.168.1.121
hm2_eth: loading Mesa AnyIO HostMot2 ethernet driver version 0.2
hm2_eth: ERROR: 192.168.1.121: Could not retrieve mac address
hm2_eth: rtapi_app_main: Resource temporarily unavailable (-11)
<stdin>:2: waitpid failed /usr/bin/rtapi_app hm2_eth
<stdin>:2: /usr/bin/rtapi_app exited without becoming ready
<stdin>:2: insmod for hm2_eth failed, returned -1
halcmd:

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09 Jun 2017 13:55 - 09 Jun 2017 13:56 #94344 by PCW
Replied by PCW on topic Mesa 7i96 Ethernet board
Usually that means that there's a network setup issue of some kind

I would make sure you can ping the card before proceeding

Note that the 192.168.1.121 address is often handy for setup, its usually not a good
choice for a final working system as its liable to overlap a common NAT range
s0 the 10.10.10.10 address is usually better.
Last edit: 09 Jun 2017 13:56 by PCW.

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09 Jun 2017 14:30 #94346 by microsprintbuilder
I get nothing
stever@debian-LP:~$ /linuxcnc/configs/mesa7i96 ping 192.168.1.121
bash: /linuxcnc/configs/mesa7i96: No such file or directory
stever@debian-LP:~$

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09 Jun 2017 14:47 #94347 by PCW
Replied by PCW on topic Mesa 7i96 Ethernet board
just
ping 192.168.1.121

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09 Jun 2017 14:50 #94349 by microsprintbuilder
I get

stever@debian-LP:~$ ping 192.168.1.121
PING 192.168.1.121 (192.168.1.121) 56(84) bytes of data.

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09 Jun 2017 15:04 #94351 by PCW
Replied by PCW on topic Mesa 7i96 Ethernet board
Right, so there's a network setup issue

what does
ifconfig -a
print?
(if you are running wheezy you may need /sbin/ifconfig -a)

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