main() 에서
xTaskCreate()를 통해 쓰레드를 여러개 생성하여 돌리는 컨셉
sleep() 으로 cpu를 차지하는게 아니라
vTaskDelay()를 이용하여 다른 태스크에게 넘겨줘서 처리한다.
[링크 : https://fishpoint.tistory.com/12257]
esp32 esp-idf에 포팅된 엔트리 포인트가 app_main() 인가?
그리고 xTaskCreate는 없고 xTaskCreatePinnedToCore()라는 함수를 쓰는데
특정 core 에서 돌리게 하는 일종의 affinity 제한 쓰레드 생성 함수라고 하면 되려나?
| // 主函数 void app_main() { printf("\r\nAPP %s is start!~\r\n", TAG); vTaskDelay(1000 / portTICK_PERIOD_MS); // 如果要使用任务创建图形，则需要创建固定核心任务,否则可能会出现诸如内存损坏等问题 // 创建一个固定到其中一个核心的FreeRTOS任务，选择核心1 xTaskCreatePinnedToCore(guiTask, "gui", 4096*2, NULL, 0, NULL, 1); } void guiTask(void *pvParameter) { (void) pvParameter; xGuiSemaphore = xSemaphoreCreateMutex(); // 创建GUI信号量 lv_init(); // 初始化LittlevGL lvgl_driver_init(); // 初始化液晶SPI驱动 触摸芯片SPI/IIC驱动 static lv_color_t buf1[DISP_BUF_SIZE]; #ifndef CONFIG_LVGL_TFT_DISPLAY_MONOCHROME static lv_color_t buf2[DISP_BUF_SIZE]; #endif static lv_disp_buf_t disp_buf; uint32_t size_in_px = DISP_BUF_SIZE; #if defined CONFIG_LVGL_TFT_DISPLAY_CONTROLLER_IL3820 /* Actual size in pixel, not bytes and use single buffer */ size_in_px *= 8; lv_disp_buf_init(&disp_buf, buf1, NULL, size_in_px); #elif defined CONFIG_LVGL_TFT_DISPLAY_MONOCHROME lv_disp_buf_init(&disp_buf, buf1, NULL, size_in_px); #else lv_disp_buf_init(&disp_buf, buf1, buf2, size_in_px); #endif lv_disp_drv_t disp_drv; lv_disp_drv_init(&disp_drv); disp_drv.flush_cb = disp_driver_flush; // 如果配置为 单色模式 #ifdef CONFIG_LVGL_TFT_DISPLAY_MONOCHROME disp_drv.rounder_cb = disp_driver_rounder; disp_drv.set_px_cb = disp_driver_set_px; #endif disp_drv.buffer = &disp_buf; lv_disp_drv_register(&disp_drv); // 如果有配置触摸芯片，配置触摸 #if CONFIG_LVGL_TOUCH_CONTROLLER != TOUCH_CONTROLLER_NONE lv_indev_drv_t indev_drv; lv_indev_drv_init(&indev_drv); indev_drv.read_cb = touch_driver_read; indev_drv.type = LV_INDEV_TYPE_POINTER; lv_indev_drv_register(&indev_drv); #endif const esp_timer_create_args_t periodic_timer_args = { .callback = &lv_tick_task, .name = "periodic_gui" }; esp_timer_handle_t periodic_timer; ESP_ERROR_CHECK(esp_timer_create(&periodic_timer_args, &periodic_timer)); ESP_ERROR_CHECK(esp_timer_start_periodic(periodic_timer, LV_TICK_PERIOD_MS * 1000)); // 一个标签演示 //lv_obj_t * scr = lv_disp_get_scr_act(NULL); // 获取当前屏幕 //lv_obj_t * label1 = lv_label_create(scr, NULL); // 在当前活动的屏幕上创建标签 //lv_label_set_text(label1, "Hello\nworld!"); // 修改标签的文字 // 对象对齐函数，将标签中心对齐，NULL表示在父级上对齐，当前父级是屏幕，0，0表示对齐后的x，y偏移量 //lv_obj_align(label1, NULL, LV_ALIGN_CENTER, 0, 0); /* lv_indev_t * mouse_indev = lv_indev_drv_register(&indev_drv); lv_obj_t * cursor_obj = lv_img_create(lv_scr_act(), NULL); //Create an image object for the cursor lv_img_set_src(cursor_obj, &mouse_cursor_icon); //Set the image source lv_indev_set_cursor(mouse_indev, cursor_obj); //Connect the image object to the driver */ lv_demo_widgets(); while (1) { vTaskDelay(1); // 尝试锁定信号量，如果成功，请调用lvgl的东西 if (xSemaphoreTake(xGuiSemaphore, (TickType_t)10) == pdTRUE) { lv_task_handler(); xSemaphoreGive(xGuiSemaphore); // 释放信号量 } } vTaskDelete(NULL); // 删除任务 } |
esp-idf 4.3 사용중인데, xTaskCreate가 없다?
| BaseType_t xTaskCreatePinnedToCore( TaskFunction_t pvTaskCode, const char * const pcName, const uint32_t usStackDepth, void * const pvParameters, UBaseType_t uxPriority, TaskHandle_t * const pvCreatedTask, const BaseType_t xCoreID) xTaskCreatePinnedToCore esp-idf/freertos/libfreertos.a(tasks.c.obj) esp-idf/esp_ipc/libesp_ipc.a(ipc.c.obj) esp-idf/main/libmain.a(main.c.obj) esp-idf/freertos/libfreertos.a(port_common.c.obj) esp-idf/esp_timer/libesp_timer.a(esp_timer.c.obj) esp-idf/esp32/libesp32.a(dport_access.c.obj) esp-idf/pthread/libpthread.a(pthread.c.obj) xTaskCreateRestricted esp-idf/freertos/libfreertos.a(tasks.c.obj) xTaskCreateRestrictedStatic esp-idf/freertos/libfreertos.a(tasks.c.obj) xTaskCreateStaticPinnedToCore esp-idf/freertos/libfreertos.a(tasks.c.obj) |
| 코드가 어느 코어에서 실행되고 있는가를 확인하려면 xPortGetCoreID() 함수를 사용하면 된다. xTaskCreatePinnedToCore ( Task1code, // 태스크를 구현한 함수 “Task1”, // 태스크 이름 10000, // 스택 크기 (word단위) NULL, // 태스크 파라미터 0, // 태스크 우선순위 &Task1, // 태스크 핸들 0 ); // 태스크가 실행될 코어 |
[링크 : https://arsviator.blogspot.com/2019/04/esp32-use-multicore-on-esp32.html]
[링크 : https://www.reddit.com/r/esp32/comments/vk66d8/what_is_difference_between/?tl=ko]
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