Unable to resolve coolant momentary switch issue

I've written some similar logic in Lua for a previous Mach4 build, so the logic and code should be somewhat similar in C. What's the process for creating and compiling a custom C component? Alternatively, does anyone have some hal logic they could share to achieve the required result?

IIOII wrote: I've written some similar logic in Lua for a previous Mach4 build, so the logic and code should be somewhat similar in C. What's the process for creating and compiling a custom C component? Alternatively, does anyone have some hal logic they could share to achieve the required result?

If you drop in on the plasma and laser section on this forum, there are several components I've written. Use them as an example.
This is a simple one. forum.linuxcnc.org/plasma-laser/32657-th...-indicator-component
Then its just as simple as typing "halcompile --install mycomponent.comp"
And the component is compiled and installed for you.

Just remember your component is being called every time the servo loop is called. Don't do any loops, just wait until the next pass through.

This will work with the toggle2nist, it just needs to be connected right and maybe an edge, added.

IIOII wrote: What's the process for creating and compiling a custom C component?

linuxcnc.org/docs/2.7/html/hal/comp.html

For fun you could use LUT5, with inputs from the button, halui.coolant.is-on and the iocontrol coolant pins.
LUT5 is especially good fun when you feed its own output back as an input. But it does tend to make for rather "write once" HAL code.

Thank you Todd and all with your help to rectify this problem. Todd's code works perfectly. Wiring is now complete on my system!

I copied the above code to my hal file and modified it to reflect my hardware. Thanks for posting it. Coolant button works on my mill now except for after external estop has been triggered.
After clearing estop and cycling power, the coolant button no longer turns on coolant. I have to issue M8 code or click coolant box via mouse first.
The coolant button works fine on initial power up of linuxcnc. I do not have to select coolant first with the mouse or m code.
Is that expected behavior or did I brake something with my external estop loop?

I will try to attach my actual hal file later in case something is broken.