XHC-HB04 wireless - how to set workpiece zero

I find this solution unappealing, but it ought to work.

You can create a set of MDI_COMMANDs in the [HALUI] section of theINI file.
linuxcnc.org/docs/2.7/html/config/ini-co....html#_halui_section
This defines a G-code command that is run when a HAL pin goes true. You probably wantThis will create three HAL pins halui.mdi-command-00, halui.mdi-command-01, halui.mdi-command-03, one to zero each axis.

You then need a bit of HAL logic to make the right pin of those three go high when you press the "zero" button.
What form does the selected-axis data take when it gets to the HAL layer?

Presumably it chooses which axis to jog somehow, so what is connected to each axis.n.jog-enable?

Oh, that's fun, you are using a Tcl HAL file.

It is going to be easier to create a separate HAL file that runs after the XHC HAL file to connect up the MDI_COMMANDs.

As a first step, start up your config and then open a terminal window and type "halcmd show sig jog*"