LinuxCNC torque readout and mesa cards

Have a read of this thread. It might work for you

forum.linuxcnc.org/27-driver-boards/3328...th-uart?limitstart=0

dom96 wrote: Also, I bought the 7i74 for the SSI encoders. Where can I find the pinout files for the SSI config on 7i76e and 7i74 set? I got the 7i76e working fine controlling the servo drives but I'm not sure how to use the 7i74 with the 7i76e as it doesn't show up in the PncConfig.

I think you will probably have to hand-edit the HAL for the 7i74.

Which bit-file are you using on the 7i76E?

At the moment I just use the default bit-file that came pre-installed on the card. This is actually the first time I use Mesa cards so I wouldn't know too much about how to program them.

If you were to visit
store.mesanet.com/index.php?route=produc...83_85&product_id=290
and download the "support software" (cunningly hidden under the "Specifications" tab) then you can find a PIN file (PIN_7I77_7I74_SSI_34.vhd ) that would program the 7i76 to understand SSI.

Unfortunately I don't see a corresponding BIT file in there, which is what you would require to flash the 7i76E.

I think that you might have to see if PCW has the time ti make a bitfile (This is something you can do yourself, but it's a fair bit of effort to set up the build environment).

The bitfile is 7i76e_7i76x1_7i74x1D.bit in the support zipfile

PCW wrote: The bitfile is 7i76e_7i76x1_7i74x1D.bit in the support zipfile

Isn't that Smart-serial on the 7i74? My impression was that the OP wants SSI?