Conditional Output status or Tool deselect script?

mwwhited

Re: Conditional Gcode and GPIO State
Re: Tool deselect macro?

Is it possible to write a conditional query to check that value currently sent to an output? I used M409 and can't find output or gpio status.

On my duet3 I added a relay control board using io6.out, io7.out and io8.out. I want to be able to write code in the daemon.g that can compare the selected tool to these output states.

Better still is there a gcode file that is execute when tool is deselected "T-1"? I'd prefer to not litter all of the tfreeX.g files with code to deenergize the relays.

I saw another topic where someone suggested creating a fake tool "T99" and having that do the unload then set to -1. I'd prefer to not handle it this way.

OwenD

I don't think you can poll the state of outputs yet.
I think the object model only has inputs at this point.
That said it's probably a waste of cycle time to continually poll them in daemon.g
You could create a single macro to do that and execute it from each of the tprX.g or tfreeX.g file(s).

dc42

@OwenD said in Conditional Output status or Tool deselect script?:

I don't think you can poll the state of outputs yet.

You can read outputs in 3.01-RC10. Outputs are in array 'state.gpOut'.

@mwwhited said in Conditional Output status or Tool deselect script?:

Better still is there a gcode file that is execute when tool is deselected "T-1"? I'd prefer to not litter all of the tfreeX.g files with code to deenergize the relays.

You could write a macro to do what you need, and call that macro in every tfree file
The next 3.01RC will have an additional variable state.nextTool that will be available for use in tfree and tpre files. Is that helpful?

Danal

@mwwhited said in Conditional Output status or Tool deselect script?:

I'd prefer to not litter all of the tfreeX.g files with code to deenergize the relays.

A balance point available today would be to put M98 P"/macros/checkRelays.g" in every tfree. That, at least, allows maintaining the code for the relays in one place.

OwenD

@dc42 said in Conditional Output status or Tool deselect script?:

You can read outputs in 3.01-RC10. Outputs are in array 'state.gpOut'.

Awesome.
I missed that in the change-log ( I really do RTFM - promise ! )
So it appears that you read the pwm property regardless of whether it's used as "standard" I/O?

echo state.gpOut[5].pwm

dc42

@OwenD said in Conditional Output status or Tool deselect script?:

So it appears that you read the pwm property regardless of whether it's used as "standard" I/O?
echo state.gpOut[5].pwm

Yes. You will get a value between 0.0 and 1.0. This is a recent addition, so please check that it works properly for you.

If the port is being used to drive a servo, then if you are using the default servo refresh frequency of 50Hz then the servo pulse width should be (pwm * 20000) microseconds.

mwwhited

@dc42 said in Conditional Output status or Tool deselect script?:

You could write a macro to do what you need, and call that macro in every tfree file

I know I could do this as I stated above but it has two issues. 1) It can cause an unneeded transition (could be solved by your state.nextTool.) But more importantly 2) it causes code duplication and as a software guy this drives me crazy. (this could be solved with a generic tfree.g that all tools could share.)

As for the state.gpOut[X].pwm ... that will work. (I swear I looked but it must have been before I updated to RC10, I think I only saw gpio when I did M490 K"state") I still think having more events would be better but I can make my own by checking the status of tool changes.

@dc42, is there a generic spot that I can store state or am I still waiting on variables.

@OwenD said in Conditional Output status or Tool deselect script?:

That said it's probably a waste of cycle time to continually poll them in daemon.g

I already have a polling loop in daemon.g every few seconds anyway to monitor the temperature and fan status in my power supply.

mwwhited

works great...

daemon.g

M98 P"0:/macros/Special Scripts/Check Relays"

Special Scripts/Check Relays

if state.currentTool = -1
	if state.gpOut[0].pwm > 0 || state.gpOut[1].pwm > 0 || state.gpOut[2].pwm > 0
		M98 P"0:/macros/Special Scripts/All Relays Off"

Special Scripts/All Relays Off

M18 E ;ensure steppers are off before changing relays
G4 P100
M42 P0 S0
M42 P1 S0
M42 P2 S0
G4 P100