How to get GPIO register state in GPIOTE handler

[Vas]

Hello Nordic! My question probably a simple one but I'm a novice so there's it. I'm looking for a way to get a GPIO port state that was at the moment of GPIOTE event triggering, inside the event handler. Is there any register I can read to get that?

The context: I'm trying to read a two line serial bus of TitanMicro TM1640. The start of transmission is designated by falling DIN line while SCLK line is still high. The time between falling DIN and falling SCLK is about 10 us, so when I'm reading the GPIO from the handler the SCLK is already low.

[Sigurd]

Hi!

A GPIOTE event can come from one of the following input conditions:

• Rising edge
• Falling edge
• Any change

So if you have e.g. configured it to Rising edge, you then already know it was rising to high when the event triggered.

[Vas]

I'm actually looking at the other signal state. I'm catching DIN change by GPIOTE but I need to know if SCLK was high at the moment.