K-flop with two probe inputs?

[Lozzy]

Hey,

I am currently building a dedicated expansion/connection PCB for my CNC build and need your input.
As we all know, Mach3 has only one pin assigned for a probe.
I have 2 probes, one is a touch plate, the other is a digitizing probe.
Digitizing probe for x/y probe, set them zero, change tool to endmill, touch plate for z origin, that's the idea.

This is challengins. They act reversly. Touch plate is ACTIVE HIGH & digitizing probe is ACTIVE LOW.
I once had an external circuit to combine them in serial chain and gives only one input to Mach3 BoB.
I can do this again, however, as I am building a custom PCB for my KFLOP at the moment, I wish to avoid this hassle if there is another choice.

My question is this :

Is it possible to have two probe inputs seperately into Kflop - doing this is easy, I know, one is active high, one is active low
and let KFLOP-plugin combines them as one input and delivers to Mach3 software? - this part is the real question.

I am not sure if my intention is correctly expressed.
I haven't dig into configuration files of Kflop yet.
Sorry to ask questions without studying myself first.
If anybody tried this before or knows inside of kflop config files, please give me a short answer of YES/NO.

regards,
Kevin

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[TomKerekes]

Hi Kevin,

You might have KFLOP perform a logic operation on two inputs to set a single virtual I/O bit. Then configure the Mach3 Probe bit and notification C program to watch for the virtual bit. The logic operation will need to be in a loop that gets executed continuously. Such as the following will set virtual bit 48 if input 0 goes high or if input 1 goes low:

#include "KMotionDef.h"

main()
{
	for(;;)
	{
		if (ReadBit(0) || !ReadBit(1))
			SetBit(48);
		else
			ClearBit(48);
	}
}

HTH
Regards

[Lozzy]

Hi Tom,

Great answer! That's exactly what I needed to know!
Always appreciate your endless support.
So there is a way to do it by logic, thank you very much. Now I can delete all components related to probes

* Is that code already a working version or do I have to add lines for assigning probe bits myself?

regards,
Kevin

[TomKerekes]

Hi Kevin,

Not sure exactly what you mean. The example just specifies inputs 0 and 1 as inputs. You will need to change those to what ever inputs you are using.

Regards