Effective Debounce 7 Individual Inputs on nRF52840

[WestCoastDaz]

I am trying to determine the best way to debounce 7 digital inputs with 2 bounce times ranging between 50 ms to 2 seconds.  I thought of using the GPIOTE but that seems to only have 7 channels and I'm already using 3 of them for other interrupt activities.  What is the best way to accomplish this?

I'm using the nRF52840 and SDK 17.1.0.

Thanks,

Darren

[Kenneth]

Hi, 

You may check out the app_button library in the nRF5 SDK:
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/lib_button.html

An example that show usage can be the:
\examples\ble_peripheral\ble_app_blinky\

See buttons_init() and button_event_handler().

Best regards,
Kenneth

[WestCoastDaz]

Kenneth,

Thank you very much for pointing me to that. Is it possible to have more than 7 GPIOs setup to interrupt the processor?  I have an additional 3 GPIOs that I need to monitor.

[Kenneth]

The app_button library use PORT event for lowest power, this means that it can support more than 7 GPIO's.

Kenneth