Unable to read from GPIO P0.10 on nRF5340

[tozz88]

I am trying to read from a GPIO configured as input and the value returned from gpio_pin_get_raw() is always 0. I have verified the voltage into the pin is 3.3v. Here is the code

#include <zephyr/kernel.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/gpio.h>

#define GPIO0_NODE DT_NODELABEL(gpio0)
#define ROGUE_IRQ_PIN 10

const struct device *gpio0_dev;

void main(void)
{
    gpio0_dev = DEVICE_DT_GET(GPIO0_NODE);
    gpio_pin_configure(gpio0_dev, ROGUE_IRQ_PIN, GPIO_INPUT);
    printk("irq=%d\n", gpio_pin_get_raw(gpio0_dev, ROGUE_IRQ_PIN));
}

I'm using ncs v2.4.2

This seems very simple. Am I missing something in my configuration? I have CONFIG_GPIO=y in my prt.conf. Do I need something in my device tree overlay?

[tozz88]

I also tried the following. First, I added the following to my overlay file

	buttons {
		compatible = "gpio-keys";
		button5: button_5 {
			gpios = <&gpio0 10 (GPIO_ACTIVE_HIGH)>;
			label = "IRQ_BT40";
		};
	};

	aliases {
		ircr0 = &button5;
	};

Then I rewrote the code as follows:

#define IRQ0 DT_NODELABEL(button5)
const struct gpio_dt_spec irqr = GPIO_DT_SPEC_GET(IRQ0, gpios);

void main(void)
{
  if (!device_is_ready(irqr.port)) printk("IRQ not ready\n");
  gpio_pin_configure_dt(&irqr, GPIO_INPUT);
  printk("IRQ=%d\n", gpio_pin_get_dt(&irqr));
  }
  

But this behaves the same as before.

I looked through build/zephyr/zephyr.dts but don't see any other device that uses P0.10.