ABS Encoder Posital 7i92T bit file help

Hello all,I’ve been loaned an Absolute encoder to see if I (meaning we…!!!) can use it in our linuxcnc applications.   It’s a kit encoder from Posital.   Kit Encoder | POSITAL I’m very interested in them because they do not require a battery, and they have a very small package i.e. 22mm diameter.  A few months back I was quoted $168.00 US  for the 22mm simple version which is not that much more than a kit an incremental kit encoder from US Digital.I have a development panel powered and running the following:   
RPI 4  running 2.9  (thank you elovalvo)
7i92T
7i77I can see the inputs responding to a basic xyz pnccofig,  so it's ready to go.No drives/amps yet.  Also, 7i70 on standby if needed.I’m hoping to just establish and verify communications enough so that I can order some these with confidence they will work. I’ve attached the data sheet.  It’s a binary type.  multiturnI need help with a bit file for the 7i92T,  and most likely the hal file if I can’t muddle through it.It would be great if the encoder terminal blocks on the 7i77 could be re-allocated to accommodate the clock and data pairs,  The preset and config may not need to be connected, I’ll find out.Thanks in advance for any help. Doug

What interface does the encoder have? (SSI,BISS, etc?)

Sorry Peter, I thought the pdf file attached.

Its, binary SSI  multiturn.   maybe  the attachment took this time.    

-Doug

 
 

I can make  bitfile for that but it requires a RS-422 interface
(say a 7I74 or 7I85) . You could use the serial expansion port on
the 7I77 to test 1 channel with firmware that puts a SSI interface there.

Ok thanks for clarifying. Sounds like I may not need a unique bit file. It all gets done in Hal?

No, you need specific firmware to support SSI (or BISS or whatever)
encoders.

Ok understood, I don't want to cause you any extra work for a potentially one-off project on the 7i77. the 7i74 is in stock I can get one of those coming my way if you already have firmware written for them.
-Doug

I would need to make firmware for the 7I92T as no SSI firmware exists for it.
but its not a big deal, just some copy/paste and recompile. Do have an idea
of what daughterboards/pinout you want?

I'm trying to emulate the 5i25-7i77 2x combo up to 12 axis. . (its been working real good for me) But instead of the 5i25 I'm using the 7i92t and whatever else makes the most sense. If go with the 7i74(s) It seems would need something else for servo-enable and analog/pwm. I'm totally open to suggestions.