problem with using gpio pins and functions in nrf52840-PCA10056

RE: problem with using gpio pins and functions in nrf52840-PCA10056

Caner Celiktas — Fri, 29 Nov 2019 08:44:46 GMT

Implict declaration means the compiler doesn't see the function's declaration. Which means likely you did something wrong when include header files.

[quote userid="85523" url="~/f/nordic-q-a/54939/problem-with-using-gpio-pins-and-functions-in-nrf52840-pca10056/222713"]pinStatus = nrf_gpio_pin_set(8);[/quote]

nrf_gpio_pin_set is a void function so it can not return any value. You can't equate it to anything.

RE: problem with using gpio pins and functions in nrf52840-PCA10056

diya — Fri, 29 Nov 2019 08:11:10 GMT

eventhogh after including #include "nrf_gpio.h" it is showing error
error: implicit declaration of function 'nrf_gpio_pin_set' [-Wimplicit-function-declaration]
pinStatus = nrf_gpio_pin_set(8);
^~~~~~~~~~~~~~~~
'-Wno-gnu-zero-variadic-macro-arguments' [-Werror]

how to resolve those issues ?

RE: problem with using gpio pins and functions in nrf52840-PCA10056

Caner Celiktas — Wed, 27 Nov 2019 13:20:43 GMT

You don't need make a header file. Nordic already did for you.

This works for me ;

Include "nrf_gpio.h"
init your gpio (decide your pin's direction input/output )
use nrf_gpio_pin_set or nrf_gpio_pin_clear for set or clear your pins.

or you can include "nrf_drv_gpiote.h" and you can use it's function it's similiar to "nrf_gpio.h"

there is an example in "SDK / examples/peripheral/pin_change_int" which can help you. Look over it.