GPIO low to high and high to low

RE: GPIO low to high and high to low

Marcelo Aleks — Fri, 12 Nov 2021 11:37:12 GMT

Hi Kenneth,

Yes, i am sure that is a debounce issue, but i am using a nordic board for prototyping.

I will solder a polyester capacitor trying to solve.

Anyway, thank you !

RE: GPIO low to high and high to low

Kenneth — Tue, 09 Nov 2021 08:25:04 GMT

Are you sure you are not experiencing debounce/ripple ot the GPIO? Try adding a small cap on the input and see if you experience the same?

Alternatively you can look at using the CAF buttons module (which have debounce filtering):
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/libraries/caf/buttons.html

RE: GPIO low to high and high to low

Marcelo Aleks — Mon, 08 Nov 2021 16:34:32 GMT

Hi Kenneth,

When we press the button (without release) it is generating more than 1 event, some time it generates 3 calls to the ISR method. But we would like to receive just one call (event) for the press and another for the release. Isn't it the GPIO_INT_EDGE_BOTH definition intended for?

Regards, Aleks

RE: GPIO low to high and high to low

Kenneth — Mon, 08 Nov 2021 12:55:07 GMT

Hello,

I am not entirely sure I understand what problem you have, but you can find example usage of the gpio driver under tests:
https://github.com/zephyrproject-rtos/zephyr/tree/main/tests/drivers/gpio/gpio_basic_api

Best regards,
Kenneth