RE: problem with GPIO pin as input with nrf9160 using zephyr RTOS

user114789 — Wed, 15 Jun 2022 12:38:06 GMT

Hi Depraz,

I changed my code as you said ,after changing also I'm not getting any response form my button. if I changed pin config as

" ret = gpio_pin_configure( gpio_dev ,button, GPIO_PULL_UP); " then its working fine in onboard button. if I connect it to external button its not working. My external button is connected to nrf9160 as bellow figure.

is their any changes i have to do in my code if I connect button externally to board?

RE: problem with GPIO pin as input with nrf9160 using zephyr RTOS

user93713 — Wed, 15 Jun 2022 11:46:04 GMT

Hello,

device_get_binding returns a "const struct device" so gpio_dev should be declared as

const struct device *gpio_dev =device_get_binding("GPIO_0");

It is always good to look for returned value, so I would replace

	ret = gpio_pin_configure(gpio_dev,button, GPIO_INPUT);

	ret = gpio_pin_configure(gpio_dev,button, GPIO_INPUT);
    if (ret != 0)
    {
        printk("Error %d", ret);
        return 1;
    }

Can you retry with those changes ? If this is still not working, make sure to have CONFIG_GPIO=y in your config and that the dts has

&gpio0 {
  status = "okay";
};