problem with GPIO pin as input with nrf9160 using zephyr RTOS

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

_bhanu — Wed, 29 Jun 2022 09:41:41 GMT

now its working fine

thank you.

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

Elfving — Tue, 28 Jun 2022 08:09:10 GMT

Could you try creating an overlay file for your board with this addition? When you open the input files of your project in VSC you should see a shortcut for creating overlay files right there.

/ {
    buttons {		
        button4: button_4 {
            gpios = <&gpio0 15 (GPIO_PULL_DOWN | GPIO_ACTIVE_LOW)>;
            label = "Push button switch 4";
        };
    };
};

Regards,

Elfving

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

_bhanu — Fri, 24 Jun 2022 12:56:13 GMT

Hi,

[quote userid="103347" url="~/f/nordic-q-a/88976/problem-with-gpio-pin-as-input-with-nrf9160-using-zephyr-rtos/373415"]What GPIO have you connected the button to?[/quote]

In my case i used gpio-15 is connected to eternal button.

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

Elfving — Tue, 21 Jun 2022 11:17:36 GMT

Sure! You would have to add this to the boards dts (device tree) file, either directly or by using an .overlay file. I believe it would be beneficial for you to read a bit about how these files work though, you can read about them and how they are used here in our new Dev Academy.

What GPIO have you connected the button to?

Regards,

Elfving

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

_bhanu — Tue, 21 Jun 2022 05:04:39 GMT

Hi Elfving,

thanks for reply.

[quote userid="103347" url="~/f/nordic-q-a/88976/problem-with-gpio-pin-as-input-with-nrf9160-using-zephyr-rtos/373141"]I see. Have you added the button to the dts files of your board?[/quote]

can you help me to fid the path to add button to dts file on my board.

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

Elfving — Mon, 20 Jun 2022 07:22:15 GMT

I see. Have you added the button to the dts files of your board?

Regards,

Elfving

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

_bhanu — Sat, 18 Jun 2022 04:57:10 GMT

thanks you,

[quote userid="103347" url="~/f/nordic-q-a/88976/problem-with-gpio-pin-as-input-with-nrf9160-using-zephyr-rtos/373051#373051"]When it comes the internal buttons, could you try GPIO_PULL_UP | GPIO_ACTIVE_LOW[/quote]

now it's working for internal button.

[quote userid="103347" url="~/f/nordic-q-a/88976/problem-with-gpio-pin-as-input-with-nrf9160-using-zephyr-rtos/373051#373051"]When it comes to your external button, it looks like a pull-down switch. So could you try GPIO_PULL_DOWN for that one?[/quote]

when it come to external button I tried "GPIO_PULL_DOWN" then also I'm not getting any response. Even if tried GPIO_PULL_UP then also not working.

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

Elfving — Fri, 17 Jun 2022 13:12:12 GMT

Hello Bhanu,

As you are referring to external vs internal buttons, are you using the nRF9160DK?

When it comes the internal buttons, could you try GPIO_PULL_UP | GPIO_ACTIVE_LOW? If you take a look at the dts file of the 9160 you see these pin hardware characteristics defined.

You can also have a look at how this is done in the Zephyr button example, in which gpio_pin_configure_dt() is used instead of gpio_pin_configure().

When it comes to your external button, it looks like a pull-down switch. So could you try GPIO_PULL_DOWN for that one?

Regards,

Elfving

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

_bhanu — 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

Depraz — 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";
};