LED implementation on nrF9160 with nRF connect 2.1.2

RE: LED implementation on nrF9160 with nRF connect 2.1.2

Rafalino — Tue, 15 Nov 2022 13:26:37 GMT

Hello Einar ,

It turned out to be something with parentheses since when I changed

red_led_gpio = GPIO_DT_SPEC_GET_BY_IDX(DT_N_S_leds_S_led_0, gpios, 0);

into :

red_led_gpio.port = DEVICE_DT_GET(DT_GPIO_CTLR_BY_IDX(DT_N_S_leds_S_led_0, gpios, 0));
     red_led_gpio.pin = DT_GPIO_PIN_BY_IDX(DT_N_S_leds_S_led_0, gpios, 0);
     red_led_gpio.dt_flags = DT_GPIO_FLAGS_BY_IDX(DT_N_S_leds_S_led_0, gpios, 0);

It eliminated the erros.

Thanks you for your assistance.

RE: LED implementation on nrF9160 with nRF connect 2.1.2

Einarh — Tue, 15 Nov 2022 10:02:18 GMT

Based on your error message here, I would double check for any missing parentheses or semicolons etc in your code.

If you don't find anything like that missing, could you please share the 'leds' node from your generated devicetree found in build/zephyr/zephyr.dts?

-Einar

RE: LED implementation on nrF9160 with nRF connect 2.1.2

Rafalino — Tue, 15 Nov 2022 09:40:13 GMT

Hello Einar,

I will try to clarify 🙂

I have chosen a nrf9160_ns board.
nRF connect 2.1.2.
I want to control led0 (Red LED on GPIO 2 ) and led1 (Blue LED on GPIO 3)
I have followed the example here : https://academy.nordicsemi.com/topic/gpio-generic-api/

Based on that example I wrote :

struct gpio_dt_spec red_led_gpio = GPIO_DT_SPEC_GET(DT_NODELABEL(led0), gpios);

The error messages that I get during my build are:

../src/generic_app.c: In function 'init_leds':
C:\ncs\v2.1.2\zephyr\include\zephyr\drivers\gpio.h:337:2: error: expected expression before '{' token
337 | { \
| ^
C:\ncs\v2.1.2\zephyr\include\zephyr\drivers\gpio.h:374:2: note: in expansion of macro 'GPIO_DT_SPEC_GET_BY_IDX'
374 | GPIO_DT_SPEC_GET_BY_IDX(node_id, prop, 0)
| ^~~~~~~~~~~~~~~~~~~~~~~
generic_app.c:98:22: note: in expansion of macro 'GPIO_DT_SPEC_GET'
98 | red_led_gpio = GPIO_DT_SPEC_GET(DT_NODELABEL(led0), gpios);
| ^~~~~~~~~~~~~~~~

Any suggestions ?

RE: LED implementation on nrF9160 with nRF connect 2.1.2

Rafalino — Mon, 14 Nov 2022 15:44:00 GMT

Hello Einar,

The main issue that I have is how do I get the device that corresponds to led0, led1.

I am able to get the GPIOs using :

      /* GPIOs:  p0.02 == RED */
      red_gpio = DT_GPIO_PIN(DT_NODELABEL(led0), gpios);
 
      /* GPIOs:  p0.03 == BLUE */
      blue_gpio=  DT_GPIO_PIN(DT_NODELABEL(led1), gpios);

How do I get the relevant device id?

RE: LED implementation on nrF9160 with nRF connect 2.1.2

Einarh — Mon, 14 Nov 2022 15:00:25 GMT

Hello

It would help if you shared exactly what you're having trouble with.

In general I would recommend looking up the APIs you're using in the newest documentation to check if they still work the same way:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/index.html

If you've done this and you are having trouble with something specific then please share any error messages you are seeing.

Best regards,

Einar