GPIO pin doesn`t work

[Carlos Galiana]

Hi!

I was controling a little vibration motor with a mosfet which is activated by a nrf52840Dongle pin. I was using pin 0.17 and it worked pretty well, but now I am trying to use another pin because of development reasons and I am not able to make it work with the same configuration. I am using the pins the dongle uses for the leds activation in order to simplify the work in the devicetree document. When I was using pin 0.17 I had the next configuration:

In the devicetree:

As you can see I have 0.17 enable as the led_0. In the code

/*GPIO vibration declarations*/
const struct device *gpio_dev;

In the main:

/*GPIO Vibration code*/
	gpio_dev = device_get_binding(DT_LABEL(DT_NODELABEL(gpio0)));
	gpio_pin_configure(gpio_dev, 17, GPIO_OUTPUT | GPIO_OUTPUT_INIT_LOW | GPIO_PULL_UP);

And the function that uses the pin

void gpio_set_on(struct k_timer *timer)
{
	gpio_pin_set_raw(gpio_dev, 17, 1);
	k_timer_start(timer, K_SECONDS(1), K_NO_WAIT);
}

Up to this point it works well. Now I try to change the pin to 1.15 (port 1 pin 15) and I jus modified a couple of parameters

In the devicetree

In the code

/*GPIO vibration declarations*/
const struct device *gpio_dev;

In the main

	/*GPIO Vibration code*/
	gpio_dev = device_get_binding(DT_LABEL(DT_NODELABEL(gpio1)));
	gpio_pin_configure(gpio_dev, 15, GPIO_OUTPUT | GPIO_OUTPUT_INIT_LOW | GPIO_PULL_UP);

And the function which uses the pin with a timer

void gpio_set_on(struct k_timer *timer)
{
	gpio_pin_set_raw(gpio_dev, 15, 1);
	k_timer_start(timer, K_SECONDS(1), K_NO_WAIT);
}

As you can see I just change the port and the pin in the devicetree and in the code, but It doesnt work. Do you think I am missing something?. (In the devicetree gpio1 has "okey" status, so I think it should work)

Thanks for your time.

[Simon]

I was able to get P1.15 to work using NCS v1.9.0 and the nRF52840 DK, check out this sample:

blinky_modified.zip

I attached a logic analyzer to P1.15 and confirmed that it worked:

Best regards,

Simon