I believe mesa  uses alias to the same effect.
Fix the pin name, Add an alias pin name for the wrong name and add a warning in 
the docs?

Chris M


-------- Original message --------
From: Jon Elson <[email protected]>
Date: 2018-09-06 8:50 AM (GMT-08:00)
To: EMC developers <[email protected]>
Subject: [Emc-developers] TYPO in export hal parameter name in ppmc driver

OUCH, I just found a typo in the hal_ppmc.c driver, most
likely it has been there since John Kasunich wrote it in
2005.  Now, I have to decide how to fix it.

So, for the PPMC DIO (the specific analog interface) and for
the Universal Stepper and PWM controller extra digital
outputs, the invert output parameter is like :
ppmc.0.dout.03.invert

But, due to the typo, the main digital outputs on the USC
and UPC are like :

ppmc.0.dout.03-invert

Note the HYPHEN!

Now, I could update the docs and leave the code as it is.
But, that makes things pretty inconsistent.
Since this has NEVER been noticed until now, I'm guessing
VERY few people have ever used this feature.
But, if I fix the code, then the driver will have different
behavior and syntax depending on the LinuxCNC version.

So, any suggestions?  Call out the difference in syntax
boldly in the docs, or fix the code to be consistent?

Jon

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