GPIOTE Task Handler - Sense Output

[Jack]

Hi,

I am using TIMER2, GPIOTE and PPI to implement a 6250Hz square wave at a GPIO pin. I can successfully create the square wave on the GPIO pin. However, I would like to be able to sense when this GPIO pin goes high after the GPIOTE peripheral has set it high. Is there any way of doing this? I know it is possible to sense an input pin and use the GPIOTE_IRQHandler. I am wondering if I can use the GPIOTE_IRQHandler when the output GPIO is set high by the GPIOTE peripheral?

Many Thanks

Jack

[Stian Røed Hafskjold]

Unfortunately, in order to trigger the interrupt, the pin has to be an input pin and assigned to one of the GPIOTE channels as an IN event. The same pin can not be an output pin and assigned to another GPIOTE channel as an OUT task.

However, you can physically wire the GPIO output to another GPIO input, and use this pin to trigger the interrupt.

[Jack]

OK, thank you very much for your help!