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Configuration Problems 7i92 PnCConf
Configuration Problems 7i92 PnCConf
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markbaenen
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08 Feb 2026 19:34 #342669
by markbaenen
/homeI am not a dense person. I have read A LOT on configuring. I have set up a couple other machines with StepConf.
Why does this:
look absolutely nothing like this:
when trying to configure this:
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08 Feb 2026 21:47 #342675
by PCW
Mesa configurations do not use pin numbers but channel numbers for things like stepgens and pwmgens
As long as you have the correct firmware, the order of these channels typically matches the breakout
For GPIO, GPIO numbers are used (the connector pin == GPIO mapping is in the readhmid printout)
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markbaenen
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09 Feb 2026 00:50 #342682
by markbaenen
What is the point of this config page? This has to be the least intuitive config thing I have ever seen.
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09 Feb 2026 01:06 #342683
by PCW
The point is that for most configurations you don't deal with pin numbers at all,
just channel numbers, which is also consistent with the hal file function naming.
For GPIO (which is not much used on newer systems) it would be helpful if
pncconf listed the pin numbers at least for parallel port BOBs
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markbaenen
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09 Feb 2026 14:25 #342712
by markbaenen
So you are saying that if everything on the config page says "unused", it will still work?
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tommylight
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09 Feb 2026 14:32 - 09 Feb 2026 14:34 #342713
by tommylight
Yes, the config will work, but features might not.
You have to choose stepgens or PWMgens or encoders that you want to use, also pins for IO if needed.
Last edit: 09 Feb 2026 14:34 by tommylight. Reason: more info
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markbaenen
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09 Feb 2026 15:51 #342715
by markbaenen
Stepgens for 2-9 for axes. Where is two? Where is 10 thru 14?
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09 Feb 2026 16:26 #342717
by PCW
Also you would typically configure P2 if you only have one breakout board
as that has the first stepgens and pwmgens,
Here's firmware that places the first stepgens and PWMgen on P1:
(basically just reverses the connectors) You would need to use
pncconfs "Discover" option to get it to display the correct
GPIO and channel numbers.
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markbaenen
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09 Feb 2026 18:17 #342722
by markbaenen
I wrote that firmware to the board.
I used the discovery option and accepted the component changes.
This still make zero sense:
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Configuring LinuxCNC
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Configuration Tools
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PnCConf Wizard
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Configuration Problems 7i92 PnCConf
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