MESA 5i25+7i76+7i73 Smart Serial Analog Input pins

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28 Sep 2021 22:07 #221787 by Peter_Cassar
Hi Folks,
I  have recently installed a MESA 7i73 in my system hanging off the 7i76 and would like to know how to get the analog input pins to show up in the HAL pin list. I have built a pendant and would like to use some pots for overrides. Everything is working except the analog in. I assume I need to set the software mode for the smart serial device to either mode 1 or mode 2... I know there's a config string passed in the HAL command to load the driver sserial_port_0=00000000  , If I set this string to sserial_port_0=20000000  I still don't see the analog pins showing  in the HAL configuration . Can can some help with configuration please?  I have a 10K pot wired with wiper to IN0 on the 7I73 , between 0v and 3.3v

Regards,
Peter.

 

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28 Sep 2021 22:10 - 28 Sep 2021 22:12 #221788 by PCW
You would need sserial_port_0=0200

The leftmost digit sets the mode for  for SSerial port 0 (the 7I76 field I/O)
 
Last edit: 28 Sep 2021 22:12 by PCW.

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28 Sep 2021 23:10 #221790 by Peter_Cassar
Thanks PCW . I'll give it a shot.

Peter.

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28 Sep 2021 23:18 #221791 by Peter_Cassar
PCW, sserial_port_0=0200 didn't work..It fails to find the display so I tried 0100 and that worked. The four analog pins showed up. I wonder why mode 2 doesn't work, this is the fast display mode...but I'm happy it is working in the"slow" display mode.

Peter.

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28 Sep 2021 23:30 #221792 by PCW
Yeah, I think fast display mode has never been
supported by LinuxCNC's driver, though your reported
error is fixable by changing the hal file display pin name

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28 Sep 2021 23:35 #221793 by Peter_Cassar
Thanks for the info. I'm content with the way it's working now. I will attempt to connect up the feed override in HAL....

Peter.

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