GPIOS: Rotate a pin in a port

Rotate one turned led on port 2 we use the function gpio_port_set_masked to manipulate one single led at the time using a simple mask. Pins initialization is done using the gpio node option hog.

main.c

#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>

/* get the node identifier from its label, in this case will be gpio@50400 for port 2 */
#define GPIO2_NODE DT_NODELABEL( gpio2 )

int main( void )
{
    /* Get the device descriptor for port 2 */
    const struct device *gpio2 = DEVICE_DT_GET( GPIO2_NODE );
    /* All initialization is been done by Zephyr and is indicated in the app.overlay file */

    while(1)
    {
        for(uint8_t pin = 0; pin < 5; pin++)
        {
            /* Attention, on Nordic nRF54l15dk gpio0 pin 1 and 2 doesnt work just toggle pin 0, 2 and 4 */
            /* Rotate a turn on led on gpio0 */
            gpio_port_set_masked( gpio0, 0xFF, ( 1 << pin ) );
            k_msleep(300);
        }
    }
    return 0;
}

app.overlay

/* phandle for gpio0 port */
&gpio0 {
    leds: leds{
        gpio-hog;
        /* We indicate 5 pins for this sub-node */
        gpios = <0 GPIO_ACTIVE_HIGH>, <1 GPIO_ACTIVE_HIGH>, <2 GPIO_ACTIVE_HIGH>, <3 GPIO_ACTIVE_HIGH>, <4 GPIO_ACTIVE_HIGH>;
        output-low; /* All pins configured as output with low level init */
    };
};

prj.conf

# Disable optimizations
CONFIG_NO_OPTIMIZATIONS=y
# Include GPIO drivers in system config (KCONFIG)
CONFIG_GPIO=y
# Option to init pins using the DTC
CONFIG_GPIO_HOGS=y