feat(openthread): add different led color for openthread devices

examples/openthread/ot_br/main/esp_ot_br.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: CC0-1.0
  *
@@ -15,6 +15,7 @@
 #include <stdio.h>
 #include <string.h>
 
+#include "sdkconfig.h"
 #include "esp_check.h"
 #include "esp_err.h"
 #include "esp_event.h"
@@ -35,7 +36,6 @@
 #include "mdns.h"
 #include "nvs_flash.h"
 #include "protocol_examples_common.h"
-#include "sdkconfig.h"
 #include "driver/uart.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -44,6 +44,10 @@
 #include "openthread/logging.h"
 #include "openthread/tasklet.h"
 
+#if CONFIG_OPENTHREAD_STATE_INDICATOR_ENABLE
+#include "ot_led_strip.h"
+#endif
+
 #define TAG "esp_ot_br"
 
 #if CONFIG_EXTERNAL_COEX_ENABLE
@@ -72,6 +76,9 @@ static void ot_task_worker(void *aContext)
 
     // Initialize border routing features
     esp_openthread_lock_acquire(portMAX_DELAY);
+#if CONFIG_OPENTHREAD_STATE_INDICATOR_ENABLE
+    ESP_ERROR_CHECK(esp_openthread_state_indicator_init(esp_openthread_get_instance()));
+#endif
     ESP_ERROR_CHECK(esp_netif_attach(openthread_netif, esp_openthread_netif_glue_init(&config)));
 
     (void)otLoggingSetLevel(CONFIG_LOG_DEFAULT_LEVEL);

examples/openthread/ot_br/main/idf_component.yml

@@ -6,3 +6,5 @@ dependencies:
   ## Required IDF version
   idf:
     version: ">=5.0"
+  ot_led:
+    path: ${IDF_PATH}/examples/openthread/ot_common_components/ot_led

examples/openthread/ot_cli/main/esp_ot_cli.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: CC0-1.0
  *
@@ -16,6 +16,7 @@
 #include <unistd.h>
 #include <string.h>
 
+#include "sdkconfig.h"
 #include "esp_err.h"
 #include "esp_event.h"
 #include "esp_log.h"
@@ -38,6 +39,10 @@
 #include "openthread/logging.h"
 #include "openthread/tasklet.h"
 
+#if CONFIG_OPENTHREAD_STATE_INDICATOR_ENABLE
+#include "ot_led_strip.h"
+#endif
+
 #if CONFIG_OPENTHREAD_CLI_ESP_EXTENSION
 #include "esp_ot_cli_extension.h"
 #endif // CONFIG_OPENTHREAD_CLI_ESP_EXTENSION
@@ -65,6 +70,10 @@ static void ot_task_worker(void *aContext)
     // Initialize the OpenThread stack
     ESP_ERROR_CHECK(esp_openthread_init(&config));
 
+#if CONFIG_OPENTHREAD_STATE_INDICATOR_ENABLE
+    ESP_ERROR_CHECK(esp_openthread_state_indicator_init(esp_openthread_get_instance()));
+#endif
+
 #if CONFIG_OPENTHREAD_LOG_LEVEL_DYNAMIC
     // The OpenThread log level directly matches ESP log level
     (void)otLoggingSetLevel(CONFIG_LOG_DEFAULT_LEVEL);

examples/openthread/ot_cli/main/idf_component.yml

@@ -4,3 +4,5 @@ dependencies:
     version: "~1.0.0"
   idf:
     version: ">=4.1.0"
+  ot_led:
+    path: ${IDF_PATH}/examples/openthread/ot_common_components/ot_led

examples/openthread/ot_common_components/ot_led/CMakeLists.txt

@@ -0,0 +1,7 @@
+if(CONFIG_OPENTHREAD_STATE_INDICATOR_ENABLE)
+    set(srcs "ot_led_strip.c")
+endif()
+
+idf_component_register(SRCS "${srcs}"
+                    INCLUDE_DIRS "include"
+                    PRIV_REQUIRES led_strip openthread)

examples/openthread/ot_common_components/ot_led/Kconfig.projbuild

@@ -0,0 +1,24 @@
+menu "OpenThread Device Role LED"
+
+    orsource "$IDF_PATH/examples/common_components/env_caps/$IDF_TARGET/Kconfig.env_caps"
+
+    config OPENTHREAD_STATE_INDICATOR_ENABLE
+        depends on SOC_RMT_SUPPORTED
+        bool 'Enable the LED for openthread deivce'
+        default False
+        help
+            If enabled, the LED of ESP Openthread Device will display different colors based on the current role.
+
+    config OPENTHREAD_STATE_INDICATOR_GPIO
+        depends on OPENTHREAD_STATE_INDICATOR_ENABLE
+        int "Blink GPIO number"
+        range ENV_GPIO_RANGE_MIN ENV_GPIO_OUT_RANGE_MAX
+        default 5 if IDF_TARGET_ESP32
+        default 18 if IDF_TARGET_ESP32S2
+        default 48 if IDF_TARGET_ESP32S3
+        default 8
+        help
+            GPIO number (IOxx) to blink on and off the LED.
+            Some GPIOs are used for other purposes (flash connections, etc.) and cannot be used to blink.
+
+endmenu

examples/openthread/ot_common_components/ot_led/idf_component.yml

@@ -0,0 +1,2 @@
+dependencies:
+  espressif/led_strip: "^2.4.1"

examples/openthread/ot_common_components/ot_led/include/ot_led_strip.h

@@ -0,0 +1,53 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0-1.0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#include "esp_err.h"
+#include "esp_openthread.h"
+
+/**
+ * @brief Initilize the LED of OpenThread device.
+ *
+ * @return
+ *      - ESP_OK on success
+ *      - ESP_FAIL on failure
+ *
+ */
+esp_err_t esp_openthread_state_indicator_init(otInstance *instance);
+
+/**
+ * @brief Set the LED color of OpenThread device.
+ *
+ * @param[in] index index of pixel to set
+ * @param[in] red   red part of color
+ * @param[in] green green part of color
+ * @param[in] blue  blue part of color
+ *
+ * @return
+ *      - ESP_OK on success
+ *      - ESP_ERR_INVALID_ARG: Set LED color failed because of invalid parameters
+ *      - ESP_FAIL on other failure
+ *
+ */
+esp_err_t esp_openthread_state_indicator_set(uint32_t index, uint32_t red, uint32_t green, uint32_t blue);
+
+/**
+ * @brief Clear the LED color of OpenThread device.
+ *
+ * @return
+ *      - ESP_OK on success
+ *      - ESP_ERR_INVALID_ARG: Clear LED color failed because of invalid parameters
+ *      - ESP_FAIL on other failure
+ *
+ */
+esp_err_t esp_openthread_state_indicator_clear(void);

examples/openthread/ot_common_components/ot_led/ot_led_strip.c

@@ -0,0 +1,77 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0-1.0
+ *
+ * OpenThread Command Line Example
+ *
+ * This example code is in the Public Domain (or CC0 licensed, at your option.)
+ *
+ * Unless required by applicable law or agreed to in writing, this
+ * software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#include "ot_led_strip.h"
+#include "esp_check.h"
+#include "led_strip.h"
+#include "esp_err.h"
+#include "esp_openthread.h"
+
+static led_strip_handle_t s_led_strip;
+
+#define TAG "OT_LED"
+
+static void configure_led(void)
+{
+    /* LED strip initialization with the GPIO and pixels number*/
+    led_strip_config_t strip_config = {
+        .strip_gpio_num = CONFIG_OPENTHREAD_STATE_INDICATOR_GPIO,
+        .max_leds = 1, // at least one LED on board
+    };
+    led_strip_rmt_config_t rmt_config = {
+        .resolution_hz = 10 * 1000 * 1000, // 10MHz
+        .flags.with_dma = false,
+    };
+    ESP_ERROR_CHECK(led_strip_new_rmt_device(&strip_config, &rmt_config, &s_led_strip));
+    /* Set all LED off to clear all pixels */
+    ESP_ERROR_CHECK(led_strip_clear(s_led_strip));
+}
+
+static void ot_indicator_change_callback(otChangedFlags changed_flags, void* ctx)
+{
+    otInstance *instance = esp_openthread_get_instance();
+    otDeviceRole role = otThreadGetDeviceRole(instance);
+    if (role == OT_DEVICE_ROLE_DISABLED) {
+        esp_openthread_state_indicator_clear();
+    } else if (role == OT_DEVICE_ROLE_DETACHED) {
+        esp_openthread_state_indicator_set(0, 40, 0, 0);
+    } else if (role == OT_DEVICE_ROLE_LEADER) {
+        esp_openthread_state_indicator_set(0, 0, 40, 0);
+    } else if (role == OT_DEVICE_ROLE_ROUTER) {
+        esp_openthread_state_indicator_set(0, 0, 0, 40);
+    } else if (role == OT_DEVICE_ROLE_CHILD) {
+        esp_openthread_state_indicator_set(0, 40, 8, 60);
+    }
+}
+
+esp_err_t esp_openthread_state_indicator_init(otInstance *instance)
+{
+    configure_led();
+    ESP_RETURN_ON_FALSE(otSetStateChangedCallback(instance, ot_indicator_change_callback, NULL) == OT_ERROR_NONE,
+        ESP_FAIL, TAG, "Failed to install state change callback");
+    return ESP_OK;
+}
+
+esp_err_t esp_openthread_state_indicator_set(uint32_t index, uint32_t red, uint32_t green, uint32_t blue)
+{
+    ESP_RETURN_ON_ERROR(led_strip_set_pixel(s_led_strip, index, red, green, blue), TAG, "Failed to set color for openthread state");
+    ESP_RETURN_ON_ERROR(led_strip_refresh(s_led_strip), TAG, "Failed to refresh color for openthread state");
+    return ESP_OK;
+}
+
+esp_err_t esp_openthread_state_indicator_clear(void)
+{
+    ESP_RETURN_ON_ERROR(led_strip_clear(s_led_strip), TAG, "Failed to clear color for openthread state");
+    return ESP_OK;
+}