ESP32 - Blink Example Verständnisfrage

static void main_task(void* args)

{

    ESP_LOGI(MAIN_TAG, "Started on CPU%d", (int)xPortGetCoreID());

#if !CONFIG_FREERTOS_UNICORE

    // Wait for FreeRTOS initialization to finish on other core, before replacing its startup stack

    esp_register_freertos_idle_hook_for_cpu(other_cpu_startup_idle_hook_cb, !xPortGetCoreID());

    while (!s_other_cpu_startup_done) {

        ;

    }

    esp_deregister_freertos_idle_hook_for_cpu(other_cpu_startup_idle_hook_cb, !xPortGetCoreID());

#endif

    // [refactor-todo] check if there is a way to move the following block to esp_system startup

    heap_caps_enable_nonos_stack_heaps();

    // Now we have startup stack RAM available for heap, enable any DMA pool memory

#if CONFIG_SPIRAM_MALLOC_RESERVE_INTERNAL

    if (esp_psram_is_initialized()) {

        esp_err_t r = esp_psram_extram_reserve_dma_pool(CONFIG_SPIRAM_MALLOC_RESERVE_INTERNAL);

        if (r != ESP_OK) {

            ESP_LOGE(MAIN_TAG, "Could not reserve internal/DMA pool (error 0x%x)", r);

            abort();

        }

    }

#endif

    // Initialize TWDT if configured to do so

#if CONFIG_ESP_TASK_WDT_INIT

    esp_task_wdt_config_t twdt_config = {

        .timeout_ms = CONFIG_ESP_TASK_WDT_TIMEOUT_S * 1000,

        .idle_core_mask = 0,

#if CONFIG_ESP_TASK_WDT_PANIC

        .trigger_panic = true,

#endif

    };

#if CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU0

    twdt_config.idle_core_mask |= (1 << 0);

#endif

#if CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU1

    twdt_config.idle_core_mask |= (1 << 1);

#endif

    ESP_ERROR_CHECK(esp_task_wdt_init(&twdt_config));

#endif // CONFIG_ESP_TASK_WDT

    /*

    Note: Be careful when changing the "Calling app_main()" log below as multiple pytest scripts expect this log as a

    start-of-application marker.

    */

    ESP_LOGI(MAIN_TAG, "Calling app_main()");

    extern void app_main(void);

    app_main();

    ESP_LOGI(MAIN_TAG, "Returned from app_main()");

    vTaskDelete(NULL);

}