USB EXPERIMENT INTERFACE BOARD - catch a quick digital signa

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1

Hello,

I got following question regarding USB EXPERIMENT INTERFACE BOARD and K8055D.dll:

I need to detect a very quick High/Low signal on a digital input.
Is there any posibility like a funktion “wait for digital input x”.
On a microcontroller I would use a hardware interrupt which is not possible here, I expect?

As it looks for me I would need to wait for the input in a while loop and it can happen that i do not see it because i do not hit the short high period.

Any idea? :unamused:

Thanks,

T.Hoffmann

2

The USB polling interval is 10ms.
So it is not possible to detect shorter pulses than 10ms with the K8055 digital inputs.

You may use the counter function. It detects 0.25ms pulses when the debounce time is set to 0.

If your pulse is shorter than 0.25ms then you may use the VM167 interface board and VM167.DLL.
The counter of VM167 can detect 0.5us pulses.

3

Thank you for quick support ! :slight_smile: