halui toggle button

I have an external momentary button and i want to toggle between halui.flood.on and halui.flood.off
How can do this config ?

Also i have an output pin that activates lubrication pump and an output pin that activates a solenoid hydraulic valve that releases spindle tool clamp
where in hal must connect it in iocontrol v2 ?

For your coolant flood, you would use the "toggle2nist" component.
It has 4 hal pins:
toggle2nist.N.in Would connect to the output signal from your button input.
toggle2nist.N.is-on Would connect to the output signal from the hal pin "halui.flood.is-on".
toggle2nist.N.on Would connect to the input signal to the hal pin "halui.flood.on".
toggle2nist.N.off Would connect to the input signal to the hal pin "halui.flood.off".

There is not any pre defined pins designated for lube or spindle release. You must build your own logic to handle these functions.

Often machine integrators will set up custom M-codes (M100-199) that turn the required hal pins on or off. Then implement special logic (Hal or PLC) to prevent or enable the states as necessary. Such as preventing the tool from being released if the spindle is running.

Here linuxcnc.org/docs/html/config/iov2.html
shows pins relevant to lube and tool change
also halui linuxcnc.org/docs/html/man/man1/halui.1.html#Lube
has pins for lube.

How can use these pins ?

I'm sorry I am not as familiar with iocontrol v2, and missed that. I'm not sure what exactly the lube related pins do other than exactly what it says in the man page. As far as I know the pins will only be true if the machine is out of estop and the halui pin "halui.lube.on" is true. So it might be a rather toothless addition that doesn't really do much of anything, and you will still need to create appropriate logic to control it. I could be completely wrong, but I'm not seeing documentation to say otherwise.

iov2 seems to removed from master..
I have manual tool change that is connected to an output pin that releases the tool(hydraulic) so spindle must inhibited from running when this is activated
also when spindle runs tool change must inhibited
Both inhibitions must be done for safety reasons.

How to do this ?

You can do it like this.

loadrt toggle count=5
addf toggle.0 servo-thread
setp toggle.0.debounce 50 

net flood-toggle toggle.0.in <= hm2_5i25.0.7i77.0.0.input-29
net flood-control toggle.0.out => hm2_5i25.0.7i77.0.0.output-02