Using ws2812 with nrf52840

RE: Using ws2812 with nrf52840

MOHAMED AHMED ALI MAHMOUD ELSABAGH — Tue, 22 Apr 2025 10:10:34 GMT

Kazi Afroza Sultana Adding SPIM_SCK pin on the overlay file actually solved the problem, it was missing before coz it wasn't used or needed, I am not sure why it's working on debug optimization and not on size/speed optimization though

RE: Using ws2812 with nrf52840

MOHAMED AHMED ALI MAHMOUD ELSABAGH — Tue, 15 Apr 2025 15:28:59 GMT

I actually have those on top of my file

#include <nordic/nrf52840_qiaa.dtsi>
#include <zephyr/dt-bindings/led/led.h>

#include "../../../nrf52-bindings.h"

also as I mentioned everything is working fine when the build is set to debug optimization but I get those errors only with size or speed optimization build

RE: Using ws2812 with nrf52840

Kazi Afroza Sultana — Tue, 15 Apr 2025 15:25:15 GMT

Hello,

I have checked your overlay file. It is missing include header file.

spi3_default_alt and spi3_sleep_alt should be inside pinctrl node.

Can you try this following overlay instead?

#include <zephyr/dt-bindings/led/led.h>
#include "../nrf52-bindings.h"

&pinctrl {
    spi3_default_alt: spi3_default_alt {
        group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 10)>,
                   <NRF_PSEL(SPIM_MOSI, 0, 9)>;
        };
    };

    spi3_sleep_alt: spi3_sleep_alt {
        group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 10)>,
                   <NRF_PSEL(SPIM_MOSI, 0, 9)>;
            low-power-enable;
        };
    };
};

&spi3 {
    compatible = "nordic,nrf-spim";
    status = "okay";
    pinctrl-0 = <&spi3_default_alt>;
    pinctrl-1 = <&spi3_sleep_alt>;
    pinctrl-names = "default", "sleep";

    led_strip: ws2812@0 {
        compatible = "worldsemi,ws2812-spi";

        /* SPI */
        reg = <0>; /* ignored, but necessary for SPI bindings */
        spi-max-frequency = <SPI_FREQ>;

        /* WS2812 */
        chain-length = <1>; /* arbitrary; change at will */
        color-mapping = <LED_COLOR_ID_GREEN
                 LED_COLOR_ID_RED
                 LED_COLOR_ID_BLUE>;
        spi-one-frame = <ONE_FRAME>;
        spi-zero-frame = <ZERO_FRAME>;
    };
};

/ {
    aliases {
        led-strip = &led_strip;
    };
};

RE: Using ws2812 with nrf52840

MOHAMED AHMED ALI MAHMOUD ELSABAGH — Tue, 15 Apr 2025 10:35:48 GMT

Here is how my overlay looks like

&spi3 {
	compatible = "nordic,nrf-spim";
	status = "okay";
	pinctrl-0 = <&spi3_default_alt>;
	pinctrl-1 = <&spi3_sleep_alt>;
	// cs-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>; /* D4 */ 
    pinctrl-names = "default", "sleep";

	led_strip: ws2812@0 {
		compatible = "worldsemi,ws2812-spi";

		/* SPI */
		reg = <0>; /* ignored, but necessary for SPI bindings */
		spi-max-frequency = <SPI_FREQ>;

		/* WS2812 */
		chain-length = <1>; /* arbitrary; change at will */
		color-mapping = <LED_COLOR_ID_GREEN
				 LED_COLOR_ID_RED
				 LED_COLOR_ID_BLUE>;
		spi-one-frame = <ONE_FRAME>;
		spi-zero-frame = <ZERO_FRAME>;
	};
};



spi3_default_alt: spi3_default_alt {
		group1 {
			psels = <NRF_PSEL(SPIM_MOSI, 0, 9)>;
			low-power-enable;
		};
	};

	spi3_sleep_alt: spi3_sleep_alt {
		group1 {
			psels = <NRF_PSEL(SPIM_MOSI, 0, 9)>;
			low-power-enable;
		};
	};