RE: Problems driving a GPIO pin directly

Vidar Berg — Tue, 28 Oct 2025 05:33:13 GMT

I've not been able to reproduce this build error here even though I copied the code from your post here. Please try to build the project attached below for nrf52840dk/nrf52840 and see if you get the same result.

devzone.nordicsemi.com/.../direct_5F00_gpio.zip

RE: Problems driving a GPIO pin directly

GalBrandwine — Mon, 27 Oct 2025 18:46:05 GMT

Yes it appears, here's a fractions of it:

Generated by gen_defines.py

* DTS input file:

* /home/gal/dev/ism330bx_driver_contribution/zephyr/samples/sensor/ism330bx/build_nrf52840dk/ism330bx/zephyr/zephyr.dts.pre

* Directories with bindings:

* $ZEPHYR_BASE/dts/bindings

* Node dependency ordering (ordinal and path):

* 0 /

* 1 /aliases

* 2 /analog-connector

* 3 /chosen

* 4 /connector

* 5 /entropy_bt_hci

* 6 /ism330bx-on <-------------------------

* 7 /soc

* 8 /soc/interrupt-controller@e000e100

...

* Devicetree node: /ism330bx-on

* Node identifier: DT_N_S_ism330bx_on

/* Node's full path: */

#define DT_N_S_ism330bx_on_PATH "/ism330bx-on"

/* Node's name with unit-address: */

#define DT_N_S_ism330bx_on_FULL_NAME "ism330bx-on"

#define DT_N_S_ism330bx_on_FULL_NAME_UNQUOTED ism330bx-on

#define DT_N_S_ism330bx_on_FULL_NAME_TOKEN ism330bx_on

#define DT_N_S_ism330bx_on_FULL_NAME_UPPER_TOKEN ISM330BX_ON

/* Node parent (/) identifier: */

#define DT_N_S_ism330bx_on_PARENT DT_N

/* Node's index in its parent's list of children: */

#define DT_N_S_ism330bx_on_CHILD_IDX 13

/* Helpers for dealing with node labels: */

#define DT_N_S_ism330bx_on_NODELABEL_NUM 1

#define DT_N_S_ism330bx_on_FOREACH_NODELABEL(fn) fn(ism330bx_on)

#define DT_N_S_ism330bx_on_FOREACH_NODELABEL_VARGS(fn, ...) fn(ism330bx_on, __VA_ARGS__)

#define DT_N_S_ism330bx_on_FOREACH_ANCESTOR(fn) fn(DT_N)

/* Helper macros for child nodes of this node. */

#define DT_N_S_ism330bx_on_CHILD_NUM 0

#define DT_N_S_ism330bx_on_CHILD_NUM_STATUS_OKAY 0

#define DT_N_S_ism330bx_on_FOREACH_CHILD(fn)

#define DT_N_S_ism330bx_on_FOREACH_CHILD_SEP(fn, sep)

#define DT_N_S_ism330bx_on_FOREACH_CHILD_VARGS(fn, ...)

#define DT_N_S_ism330bx_on_FOREACH_CHILD_SEP_VARGS(fn, sep, ...)

#define DT_N_S_ism330bx_on_FOREACH_CHILD_STATUS_OKAY(fn)

#define DT_N_S_ism330bx_on_FOREACH_CHILD_STATUS_OKAY_SEP(fn, sep)

#define DT_N_S_ism330bx_on_FOREACH_CHILD_STATUS_OKAY_VARGS(fn, ...)

#define DT_N_S_ism330bx_on_FOREACH_CHILD_STATUS_OKAY_SEP_VARGS(fn, sep, ...)

/* Node's hash: */

#define DT_N_S_ism330bx_on_HASH RK7rhp0es0wa45nQAzQVLQIhlYlTg93LHE8rLVlodbE

/* Node's dependency ordinal: */

#define DT_N_S_ism330bx_on_ORD 6

#define DT_N_S_ism330bx_on_ORD_STR_SORTABLE 00006

/* Ordinals for what this node depends on directly: */

#define DT_N_S_ism330bx_on_REQUIRES_ORDS \

0, /* / */

/* Ordinals for what depends directly on this node: */

#define DT_N_S_ism330bx_on_SUPPORTS_ORDS /* nothing */

/* Existence and alternate IDs: */

#define DT_N_S_ism330bx_on_EXISTS 1

#define DT_N_INST_0_nordic_gpio_pins DT_N_S_ism330bx_on

#define DT_N_NODELABEL_ism330bx_on DT_N_S_ism330bx_on

/* Macros for properties that are special in the specification: */

#define DT_N_S_ism330bx_on_REG_NUM 0

#define DT_N_S_ism330bx_on_RANGES_NUM 0

#define DT_N_S_ism330bx_on_FOREACH_RANGE(fn)

#define DT_N_S_ism330bx_on_IRQ_NUM 0

#define DT_N_S_ism330bx_on_IRQ_LEVEL 0

#define DT_N_S_ism330bx_on_COMPAT_MATCHES_nordic_gpio_pins 1

#define DT_N_S_ism330bx_on_COMPAT_VENDOR_IDX_0_EXISTS 1

#define DT_N_S_ism330bx_on_COMPAT_VENDOR_IDX_0 "Nordic Semiconductor"

#define DT_N_S_ism330bx_on_COMPAT_MODEL_IDX_0_EXISTS 1

#define DT_N_S_ism330bx_on_COMPAT_MODEL_IDX_0 "gpio-pins"

#define DT_N_S_ism330bx_on_STATUS_okay 1

/* Pin control (pinctrl-<i>, pinctrl-names) properties: */

#define DT_N_S_ism330bx_on_PINCTRL_NUM 0

/* Generic property macros: */

#define DT_N_S_ism330bx_on_P_compatible {"nordic,gpio-pins"}

#define DT_N_S_ism330bx_on_P_compatible_IDX_0_EXISTS 1

#define DT_N_S_ism330bx_on_P_compatible_IDX_0 "nordic,gpio-pins"

#define DT_N_S_ism330bx_on_P_compatible_IDX_0_STRING_UNQUOTED nordic,gpio-pins

#define DT_N_S_ism330bx_on_P_compatible_IDX_0_STRING_TOKEN nordic_gpio_pins

#define DT_N_S_ism330bx_on_P_compatible_IDX_0_STRING_UPPER_TOKEN NORDIC_GPIO_PINS

#define DT_N_S_ism330bx_on_P_compatible_FOREACH_PROP_ELEM(fn) fn(DT_N_S_ism330bx_on, compatible, 0)

#define DT_N_S_ism330bx_on_P_compatible_FOREACH_PROP_ELEM_SEP(fn, sep) fn(DT_N_S_ism330bx_on, compatible, 0)

#define DT_N_S_ism330bx_on_P_compatible_FOREACH_PROP_ELEM_VARGS(fn, ...) fn(DT_N_S_ism330bx_on, compatible, 0, __VA_ARGS__)

#define DT_N_S_ism330bx_on_P_compatible_FOREACH_PROP_ELEM_SEP_VARGS(fn, sep, ...) fn(DT_N_S_ism330bx_on, compatible, 0, __VA_ARGS__)

#define DT_N_S_ism330bx_on_P_compatible_LEN 1

#define DT_N_S_ism330bx_on_P_compatible_EXISTS 1

#define DT_N_S_ism330bx_on_P_status "okay"

#define DT_N_S_ism330bx_on_P_status_STRING_UNQUOTED okay

#define DT_N_S_ism330bx_on_P_status_STRING_TOKEN okay

#define DT_N_S_ism330bx_on_P_status_STRING_UPPER_TOKEN OKAY

#define DT_N_S_ism330bx_on_P_status_IDX_0 "okay"

#define DT_N_S_ism330bx_on_P_status_IDX_0_EXISTS 1

#define DT_N_S_ism330bx_on_P_status_IDX_0_ENUM_IDX 1

#define DT_N_S_ism330bx_on_P_status_IDX_0_ENUM_VAL_okay_EXISTS 1

#define DT_N_S_ism330bx_on_P_status_ENUM_VAL_okay_EXISTS 1

#define DT_N_S_ism330bx_on_P_status_FOREACH_PROP_ELEM(fn) fn(DT_N_S_ism330bx_on, status, 0)

#define DT_N_S_ism330bx_on_P_status_FOREACH_PROP_ELEM_SEP(fn, sep) fn(DT_N_S_ism330bx_on, status, 0)

#define DT_N_S_ism330bx_on_P_status_FOREACH_PROP_ELEM_VARGS(fn, ...) fn(DT_N_S_ism330bx_on, status, 0, __VA_ARGS__)

#define DT_N_S_ism330bx_on_P_status_FOREACH_PROP_ELEM_SEP_VARGS(fn, sep, ...) fn(DT_N_S_ism330bx_on, status, 0, __VA_ARGS__)

#define DT_N_S_ism330bx_on_P_status_LEN 1

#define DT_N_S_ism330bx_on_P_status_EXISTS 1

I really dont see DT_N_S_ism330bx_on_P_gpios_IDX_0_VAL_pin in the devicetree_generated.h

Also, here it is from the /home/gal/dev/ism330bx_driver_contribution/zephyr/samples/sensor/ism330bx/build_nrf52840dk/ism330bx/zephyr/zephyr.dts file:

/* node '/ism330bx-on' defined in zephyr/samples/sensor/ism330bx/boards/nrf52840dk_nrf52840.overlay:6 */

ism330bx_on: ism330bx-on {

compatible = "nordic,gpio-pins"; /* in zephyr/samples/sensor/ism330bx/boards/nrf52840dk_nrf52840.overlay:7 */

gpios = < &gpio1 0x1 0x1 >; /* in zephyr/samples/sensor/ism330bx/boards/nrf52840dk_nrf52840.overlay:8 */

status = "okay"; /* in zephyr/samples/sensor/ism330bx/boards/nrf52840dk_nrf52840.overlay:9 */

};

In addition:

NCS sdk version: 3.1.0

Zephyr version: 4.2.99

Hope it helps. Please help me figure this out 🙏

RE: Problems driving a GPIO pin directly

Vidar Berg — Mon, 27 Oct 2025 13:14:09 GMT

Hello,

I'm not able to spot what the error is now. To help troubleshoot this, please check if the generated zephyr.dts in build_nrf52840dk/ism330bx/zephyr/ actually contains the ism330bx_on node. Also, if there are any references to 'ism330bx_on' in build_nrf52840dk/ism330bx/zephyr/include/generated/zephyr/devicetree_generated.h.

Best regards.

Vidar

RE: Problems driving a GPIO pin directly

GalBrandwine — Mon, 27 Oct 2025 12:40:58 GMT

A stupid copy-paste mistake by me :(

Update: when getting the right node from the dts:

int main(void)

{

int cnt = 0;

char out_str[64];

struct sensor_value odr_attr;

const struct device *const ism330bx_dev = DEVICE_DT_GET_ONE(st_ism330bx);

if (!device_is_ready(ism330bx_dev)) {

printk("sensor: device not ready.\n");

return 0;

}

static const struct gpio_dt_spec ism330bx_power =

GPIO_DT_SPEC_GET(DT_NODELABEL(ism330bx_on), gpios);

if (!device_is_ready(&ism330bx_power)) {

printk("power: device not ready.\n");

return 0;

}

gpio_pin_configure_dt(&ism330bx_power, GPIO_OUTPUT_INACTIVE);

int ret = gpio_pin_set_dt(&ism330bx_power, 0);

if (ret < 0) {

printk("Error %d: Failed to set pin %d to high\n", ret, ism330bx_power.pin);

// Handle error

} else {

printk("Successfully set pin %d to high (1)\n", ism330bx_power.pin);

}

It is still failing to compile:

/home/gal/dev/ism330bx_driver_contribution/zephyr/samples/sensor/ism330bx/build_nrf52840dk/ism330bx/zephyr/include/generated/zephyr/devicetree_generated.h:762:38: error: 'DT_N_S_ism330bx_on_P_gpios_IDX_0_VAL_pin' undeclared (first use in this function); did you mean 'DT_N_S_leds_S_led_1_P_gpios_IDX_0_VAL_pin'?
762 | #define DT_N_NODELABEL_ism330bx_on DT_N_S_ism330bx_on

Thanks, Gal

RE: Problems driving a GPIO pin directly

Vidar Berg — Mon, 27 Oct 2025 07:41:49 GMT

Hi,

In your code you're referencing a node named 'user_dbg_pin' but this is not included in the devictree you posted, hence the build error. Maybe you meant to reference 'ism330bx_on'?

Best regards,

Vidar