@Gordon 's point to not look for the other flank makes sense. I did not think about this. BUT: it looks like that you have a different issue: either the pulse has not enough energy to make it detectable or the wiring/pull-up/pull-down is still an issue.
I'm also surprised that the acquisition device sends only a pulse. Interrupt pins - if we are looking at one here - go low until the interrupt is cleared. May be the acquisition device can be programmed differently and behaves like that.
You mentioned the pulse to be visible in the screenshot of the DSO, channel 4. With everything wired up, could you detect the pulse on the NRF52832 pin with the DSO?
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@billsalt
@Gordon 's point to not look for the other flank makes sense. I did not think about this. BUT: it looks like that you have a different issue: either the pulse has not enough energy to make it detectable or the wiring/pull-up/pull-down is still an issue.
I'm also surprised that the acquisition device sends only a pulse. Interrupt pins - if we are looking at one here - go low until the interrupt is cleared. May be the acquisition device can be programmed differently and behaves like that.
You mentioned the pulse to be visible in the screenshot of the DSO, channel 4. With everything wired up, could you detect the pulse on the NRF52832 pin with the DSO?