programming

occesar_0 wrote:

want to put some valves, and I want to on and off, when needed, but through a emc2 program, is it possible?

Yes. You can do it with the Digital Output G-codes:

www.linuxcnc.org/docview/html//gcode_main.html#sec:M62-to-M65

These change the values of HAL pins called motion.digital-out-0 0, motion.digital-out-01 etc.

You then link those to parallel (or other GPIO) port pins with a "net" statement in your HAL file, like this:


net valve1 motion.digital-out-00 => parport.0.pin-10-out

"net" means connect some virtual HAL pins together
"valve1" is a name for the signal. This can be anything you want to call it.
"motion.digital-out-00" is the output (source) virtual pin that the M62 G-code changes the value of.
"=>" is an optional clue for human readers, and is ignored by EMC2
"parport.0.pin-10-out" is an input (receiver) virtual pin in HAL. (It controls an output physical pin at the connector, but to HAL it is an input)

the "net" statement can have one signal name, one output (source) pin name, and any number of input (receiver) pin names.