Do GPIO pins always need an interrupt + handler?

[Nick_RA]

I have some GPIOs which will only be read on start-up (option switches) then disabled to save power. Is there another way apart from nrf_drv_gpiote_in_init() to set up & read the pin, or do I need to provide a dummy event handler?

(In the same project I also have some other GPIO which will need interrupt on change, and another GPIO which will be read by code)

Also, how to disable the pin after it has been initialised?

nRF52832 + SDK17.1 + S112

[Frank Viganske]

Hi,

to read a GPIO only once at startup you don't need an interrupt handler. You can use the functions documented here: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/group__nrf__gpio.html

For example to configure a single pin as input you can use nrf_gpio_cfg_input (uint32_t pin_number, nrf_gpio_pin_pull_t pull_config)

then read the pin with nrf_gpio_pin_read (uint32_t pin_number), and then disable it with nrf_gpio_cfg_default (uint32_t pin_number).

Best regards

Frank

[Nick_RA]

OK great, thanks