RE: Zephyr GPIO write works but readback fails

ChriglSEI — Fri, 06 Jun 2025 06:34:48 GMT

I think RE: Read current value of an OUTPUT gpio pin gives the correct answer without the need to include more libraries.

RE: Zephyr GPIO write works but readback fails

Sigurd — Thu, 21 Sep 2023 15:22:52 GMT

Hi,

Try using nrf_gpio_pin_out_read() instead.

Snippet:

#include <hal/nrf_gpio.h>


/**
 * @brief Function for reading the output level of a GPIO pin.
 *
 * @param pin_number Specifies the pin number to read.
 *
 * @return 0 if the pin output level is low. Positive value if pin output is high.
 */
 
bool high = nrf_gpio_pin_out_read(PIN_NUMBER);