Sometimes nrf51822 not respond to pins toggle

RE: Sometimes nrf51822 not respond to pins toggle

Jørgen Holmefjord — Tue, 23 Apr 2019 08:06:38 GMT

Did you check the pin voltage with a scope? If there are bad connections or noise present that make the voltage flicker between high and low multiple times, it could cause the handler to be called multiple times.

RE: Sometimes nrf51822 not respond to pins toggle

Sergei Ivanov — Thu, 18 Apr 2019 16:10:29 GMT

I investigated and noticed that when the button is pressed and released, the gpiote_event_handler is not called 2 times as it should, but 3-8 times (this happens not every time, but often).

Why can this happen?

RE: Sometimes nrf51822 not respond to pins toggle

Jørgen Holmefjord — Tue, 09 Apr 2019 10:14:01 GMT

You can also use NRF_LOG or UART to indicate if the handlers/functions have been called, if you are not able to debug it.

RE: Sometimes nrf51822 not respond to pins toggle

Sergei Ivanov — Mon, 08 Apr 2019 15:23:15 GMT

Unfortunately, running the debugger does not make sense, because the issue occurs very rarely. There is an idea to add call handler counters. To understand exactly which place in the code stops working.
As I see 3 options here:
1) gpiote_event_handler is not called
2) debounce_timer_handler is not called
3) keypad_scan does not work

RE: Sometimes nrf51822 not respond to pins toggle

Jørgen Holmefjord — Fri, 05 Apr 2019 08:24:08 GMT

Hi,

Have you tried debugging the application, to see if the gpiote_event_handler is called when you press buttons, and if the rest of the code runs as expected?

Best regards,
Jørgen