external program run button

I have built a 3 axis gantry and using a leadshine mx4660 to control it over parallel port. I used stepconf to do the initial set up of the machine and have enabled halui. I'm new to hal programming and having issues getting a external program run/start button to work. i will post my .ini and .hal asap. Any help would be great

This method is quite nice. I use it
forum.linuxcnc.org/47-hal-examples/13201...-hold-resume-buttons

Thanks rodw, I saw that post. but i'm looking for just a simple start button. I currently have a normally open button connected to pin 12 of my parallel port.

I liked what SenorAguas was doing but it seems he switched over to what you suggested. i dont really understand the and2 logic and just need a start button. forum.linuxcnc.org/24-hal-components/318...-button-pause-switch

does adding this to my hal work? what would i need to change or simplify?

loadrt and2 count=2
addf and2.0 servo-thread
addf and2.1 servo-thread

#start button

net program-start-btn halui.mode.auto and2.0.in0 <= parport.0.pin-12-in
net program-run-ok and2.0.in1 <= halui.mode.is-auto
net remote-program-run and2.0.out => halui.program.run

If you just want a simple start button I think you only need.
It is when you try to get fancy and make the button do more than one thing like run/pause/resume, that you need the other stuff.

That works!! I had tried something similar but forgot the "=>". I am looking forward to learning and experimenting with this further.

Thanks for your support!!!

The arrow marks are optional, and are only there for human readability. Their existence or direction they point makes no difference in the functionality of the line code. If it didn't work for you before, there was some other reason.

In other words these lines are all exactly the same

Todd, thanks for the information!! Very interesting!!!

Thanks Tod I did not realise that the order in the line made no difference.

Also if you are connecting more than one hal pin, they don't even have to be on one line or even in the same hal file. These two lines together would also be equivalent to the above single lines.