Error in making code using hsl model

[Zolu]

Hi All,

I am trying to make a project for RGB lights using nRF52-DK  using NCS.

#define PWM_NODE            DT_ALIAS(rgb_pwm)
#define PWM_PIN(channel)    DT_PROP(PWM_NODE, ch##channel##_pin)


struct led {
	const struct device *pwm_dev;

	size_t id;
	struct led_color color;
	uint16_t effect_step;
	uint16_t effect_substep;

	struct k_delayed_work work;
};

static struct led leds;
static const size_t led_pins[3] = {
	PWM_PIN(0),
	PWM_PIN(1),
	PWM_PIN(2),
};

In these lines of code I am getting the following error -

'DT_N_ALIAS_rgb_pwm_P_ch0_pin' undeclared here (not in a function)

I am unable to understand why I am getting this error. Please help me to solve this.

Regards,

Zolu

[Håkon Alseth]

Hi,

 

Does your board have the alias rgb-pwm in your device tree?

https://github.com/nrfconnect/sdk-nrf/blob/v1.6.0/boards/arm/thingy91_nrf9160/thingy91_nrf9160_common.dts#L62

 

If not, you can create a nrf52dk_nrf52832.overlay file containing this:

/ {
	aliases {
		rgb-pwm = &pwm0;
	};
};

&pwm0 {
	status = "okay";
	ch0-pin = <29>;
	ch1-pin = <30>;
	ch2-pin = <31>;
};

 

Kind regards,

Håkon