Index homing Mesa 7i96s

I understood that i needed firmware that supports index on the stepgens.

Yes, that is needed if you wish to home to index with a step/dir system.

Yes, I want this option. Can you share a sample file / configuration .

Its the same as a normal stepgen configuration
with the following connections:
(assuming pncconf like names, stepgen.00 is mapped
to the X axis, and joint.0 is X)

net x-index-enable [HMOT](CARD0).stepgen.00.index-enable
net x-index-enable joint.0.index-enable

Yes, but you say at the beginning of the topic.
" If you mean homing to index in a step/dir system without encoder feedback,
that requires special firmware. "




Is there something I need to change in my firmware?

 

Umm that's not 7I96S firmware...

To support stepgen index, you need
1. Recent LinuxCNC 2.9 or master

2 To change the stepgen revision from 0x02 to 0xC2

3. If you want shared encoder/stepgen index pins, replace
QCountIDXPin with SharedSDQCIdxPin
(the module number must match on shared pins
so stepgen index 00 == encoderindex 00)
like:
IOPortTag & x"NN" & QCountTag &SharedSDQCIdxPin,

4.If you want just a stepgen index, use :
IOPortTag & x"NN" & StepGenTag & StepGenIndexPin,