Add WS2812 LED strip sample and overlays

app/Kconfig

@@ -0,0 +1,64 @@
+# Copyright (c) 2019 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+menuconfig APP_LED_SUBSYSTEM
+bool "LED Subsystem"
+default y
+
+if APP_LED_SUBSYSTEM
+	rsource "deps/Kconfig.deps"
+endif 
+
+
+menu "Board  Configuration"
+	menu "LED WS2812"
+
+	config SAMPLE_LED_UPDATE_DELAY
+		int "Delay between LED updates in ms"
+		default 50
+		range 10 1000
+		help
+		Delay between LED updates in ms.
+
+	config SAMPLE_LED_BRIGHTNESS
+		int "LED brightness"
+		default 16
+		range 1 255
+		help
+		Brightness level of each LED. Defaults to a low value to make
+		it easier to distinguish colors.
+	endmenu
+
+
+
+
+	menu "Options"
+		choice
+			prompt "LED Subsystem"
+			default BLINK_PERIOD_1000MS
+			optional
+
+		config BLINK_PERIOD_1000MS
+			bool "1000 period"
+		config BLINK_PERIOD_500MS
+			bool "500MS period"
+		endchoice
+
+		config PERIOD_BLINKING
+			bool 
+			default 1000 if BLINK_PERIOD_1000MS
+			default 500 if BLINK_PERIOD_500MS	
+			default 100
+			help
+			Enable blinking pattern. If disabled, the LEDs will be updated
+			with a static pattern.
+	endmenu
+
+endmenu	
+
+
+
+
+menu "zephyr"
+	source "Kconfig.zephyr"
+endmenu

app/esp32s3_devkitc_procpu.overlay

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2024-2025 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/led/led.h>
+
+/ {
+	aliases {
+		led-strip = &led_strip;
+	};
+};
+
+&i2s0_default {
+	group1 {
+		pinmux = <I2S0_O_SD_GPIO48>;
+	};
+};
+
+i2s_led: &i2s0 {
+	status = "okay";
+
+	dmas = <&dma 3>;
+	dma-names = "tx";
+
+	led_strip: ws2812@0 {
+		compatible = "worldsemi,ws2812-i2s";
+
+		reg = <0>;
+		chain-length = <1>;
+		color-mapping = <LED_COLOR_ID_GREEN
+				 LED_COLOR_ID_RED
+				 LED_COLOR_ID_BLUE>;
+		reset-delay = <500>;
+	};
+};
+
+&dma {
+	status = "okay";
+};

app/prj.conf

@@ -1,2 +1,10 @@
-CONFIG_GPIO=y
 CONFIG_LOG=y
+CONFIG_LED_STRIP=y
+CONFIG_LED_STRIP_LOG_LEVEL_DBG=y
+
+CONFIG_I2S=y
+CONFIG_WS2812_STRIP_I2S=y
+CONFIG_DMA=y
+
+CONFIG_APP_LED_INT_SAMPLE_BRIGHTNESS=75
+CONFIG_APP_LED_ENABLE_CUSTOM_BLINK_PATTERN=y

app/src/main.cpp

@@ -1,30 +1,74 @@
-#include <zephyr/drivers/gpio.h>
-#include <zephyr/kernel.h>
+/*
+ * Copyright (c) 2017 Linaro Limited
+ * Copyright (c) 2018 Intel Corporation
+ * Copyright (c) 2024 TOKITA Hiroshi
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <errno.h>
+#include <string.h>
+
+#define LOG_LEVEL 4
 #include <zephyr/logging/log.h>
+LOG_MODULE_REGISTER(main);
+
+#include <zephyr/kernel.h>
+#include <zephyr/drivers/led_strip.h>
+#include <zephyr/device.h>
+#include <zephyr/drivers/spi.h>
+#include <zephyr/sys/util.h>
 
-#define SLEEP_TIME_MS 1000
+#define STRIP_NODE		DT_ALIAS(led_strip)
 
-/* The devicetree node identifier for the "led0" alias. */
-#define LED_NODE DT_ALIAS(led0)
+#if DT_NODE_HAS_PROP(DT_ALIAS(led_strip), chain_length)
+#define STRIP_NUM_PIXELS	DT_PROP(DT_ALIAS(led_strip), chain_length)
+#else
+#error Unable to determine length of LED strip
+#endif
 
-static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED_NODE, gpios);
+#define DELAY_TIME K_MSEC(CONFIG_SAMPLE_LED_UPDATE_DELAY)
 
-LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);
+#define RGB(_r, _g, _b) { .r = (_r), .g = (_g), .b = (_b) }
+
+static const struct led_rgb colors[] = {
+	RGB(CONFIG_SAMPLE_LED_BRIGHTNESS, 0x00, 0x00), /* red */
+	RGB(0x00, CONFIG_SAMPLE_LED_BRIGHTNESS, 0x00), /* green */
+	RGB(0x00, 0x00, CONFIG_SAMPLE_LED_BRIGHTNESS), /* blue */
+};
+
+static struct led_rgb pixels[STRIP_NUM_PIXELS];
+
+static const struct device *const strip = DEVICE_DT_GET(STRIP_NODE);
 
 int main(void)
 {
-    bool led_state = true;
+	size_t color = 0;
+	int rc;
+
+	if (device_is_ready(strip)) {
+		LOG_INF("Found LED strip device %s", strip->name);
+	} else {
+		LOG_ERR("LED strip device %s is not ready", strip->name);
+		return 0;
+	}
+
+	LOG_INF("Displaying pattern on strip");
+	while (1) {
+		for (size_t cursor = 0; cursor < ARRAY_SIZE(pixels); cursor++) {
+			memset(&pixels, 0x00, sizeof(pixels));
+			memcpy(&pixels[cursor], &colors[color], sizeof(struct led_rgb));
 
-    if (!gpio_is_ready_dt(&led)) return 0;
+			rc = led_strip_update_rgb(strip, pixels, STRIP_NUM_PIXELS);
+			if (rc) {
+				LOG_ERR("couldn't update strip: %d", rc);
+			}
 
-    if (gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE) < 0) return 0;
+			k_sleep(DELAY_TIME);
+		}
 
-    while (1) {
-        if (gpio_pin_toggle_dt(&led) < 0) return 0;
+		color = (color + 1) % ARRAY_SIZE(colors);
+	}
 
-        led_state = !led_state;
-        LOG_INF("LED state: %s", led_state ? "ON" : "OFF");
-        k_msleep(SLEEP_TIME_MS);
-    }
-    return 0;
+	return 0;
 }

west.yml

@@ -8,7 +8,5 @@ manifest:
       import:
         name-allowlist:
           - cmsis_6
-          - hal_nxp
-          - hal_stm32
-          - hal_nordic
+          - hal_espressif
         path-prefix: deps