How to use the PORT event

[hbjin]

HI ,all ! I have a question about PORT event function.

as the 4 channels of GPIOTE (channel0 to channel3 ) have been used for other usage.

i need to use a general IO to detect the falling edge signal, the signal is a 50Hz square wave.

How should i do ~~

[Charles Manning]

There is an example for this in: /opt/nordic/nrf51822/Board/nrf6310/pin_change_int_example/main.c

[hbjin]

the example is base on "GPIOTE->GONFIG", but in this project the 4 channel have all used for other usage

[hbjin]

I have to use the GPIOTE->PORT EVENT

[Stian Røed Hafskjold]

but did you enable the interrupt? NVIC_EnableIRQ(GPIOTE_IRQn);