esp-idf 移植 lvgl8.3.3( 二 ) _生活百科

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编译通过后，在 main.c 文件中添加程序，程序后面附上

SPI 信道错误

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运行后不断重启，并出现图示中的问题，值需要在文件 `` 中将SPI信道改为自动模式 SPI_DMA_CH_AUTO 即可,如下图所示：
esp-idf 移植 lvgl8.3.3

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到此屏幕就能正常显示了。
五、添加触摸驱动

使用命令 idf.py menuconfig 打开图形配置界面

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进入 Component config → LVGL ESP Drivers → LVGL Touch controller 打开触摸驱动

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返回上一级，选择I2C通道

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进入 Component config → I2C Port Settings 配置I2C引脚

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六、main.c文件#include <stdbool.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include "freertos/FreeRTOS.h"#include "freertos/task.h"#include "esp_freertos_hooks.h"#include "freertos/semphr.h"#include "esp_system.h"#include "driver/gpio.h"/* Littlevgl specific */#ifdef LV_LVGL_H_INCLUDE_SIMPLE#include "lvgl.h"#else#include "lvgl/lvgl.h"#endif#include "lvgl_helpers.h"/********************* * DEFINES *********************/#define TAG "main"#define LV_TICK_PERIOD_MS 1/********************** * STATIC PROTOTYPES **********************/static void lv_tick_task(void *arg);static void guiTask(void *pvParameter);static void create_demo_application(void);/********************** * APPLICATION MAIN **********************/void app_main() { /* 使用任务创建图形时，必须使用固定任务创建 * 注意：不使用Wi-Fi或蓝牙时，可以将gui任务固定到核心0 */ xTaskCreatePinnedToCore(guiTask, "gui", 4096*2, NULL, 0, NULL, 1);}/* Creates a semaphore to handle concurrent call to lvgl stuff * If you wish to call *any* lvgl function from other threads/tasks * you should lock on the very same semaphore! */SemaphoreHandle_t xGuiSemaphore;static void guiTask(void *pvParameter) { (void) pvParameter; xGuiSemaphore = xSemaphoreCreateMutex(); lv_init(); /* 初始化驱动程序使用的SPI或I2C总线 */ lvgl_driver_init(); /* 创建堆内存，用过图形缓冲区buf1 */ lv_color_t* buf1 = heap_caps_malloc(DISP_BUF_SIZE * sizeof(lv_color_t), MALLOC_CAP_DMA); assert(buf1 != NULL); /* 不使用单色显示器时使用双缓冲 */#ifndef CONFIG_LV_TFT_DISPLAY_MONOCHROME lv_color_t* buf2 = heap_caps_malloc(DISP_BUF_SIZE * sizeof(lv_color_t), MALLOC_CAP_DMA); assert(buf2 != NULL);#else static lv_color_t *buf2 = NULL;#endif static lv_disp_draw_buf_t disp_buf; uint32_t size_in_px = DISP_BUF_SIZE;#if defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_IL3820 \ || defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_JD79653A \ || defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_UC8151D \ || defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306 /* Actual size in pixels, not bytes. */ size_in_px *= 8;#endif /* Initialize the working buffer depending on the selected display. * NOTE: buf2 == NULL when using monochrome displays. */ lv_disp_draw_buf_init(&disp_buf, buf1, buf2, size_in_px); lv_disp_drv_t disp_drv; lv_disp_drv_init(&disp_drv); disp_drv.flush_cb = disp_driver_flush; /* When using a monochrome display we need to register the callbacks: * - rounder_cb * - set_px_cb */#ifdef CONFIG_LV_TFT_DISPLAY_MONOCHROME disp_drv.rounder_cb = disp_driver_rounder; disp_drv.set_px_cb = disp_driver_set_px;#endif disp_drv.draw_buf = &disp_buf; lv_disp_drv_register(&disp_drv); /* Register an input device when enabled on the menuconfig */#if CONFIG_LV_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 /* Create and start a periodic timer interrupt to call lv_tick_inc */ 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)); /* Create the demo application */ create_demo_application(); while (1) { /* Delay 1 tick (assumes FreeRTOS tick is 10ms */ vTaskDelay(pdMS_TO_TICKS(10)); /* Try to take the semaphore, call lvgl related function on success */ if (pdTRUE == xSemaphoreTake(xGuiSemaphore, portMAX_DELAY)) { lv_task_handler(); xSemaphoreGive(xGuiSemaphore); } } /* A task should NEVER return */ free(buf1);#ifndef CONFIG_LV_TFT_DISPLAY_MONOCHROME free(buf2);#endif vTaskDelete(NULL);}/** * @brief 创建标签 */void lvgl_lable_test(){ /* 创建一个标签 */ lv_obj_t* label = lv_label_create(lv_scr_act()); if (NULL != label) { // lv_obj_set_x(label, 90); // 设置控件的X坐标 // lv_obj_set_y(label, 100); // 设置控件的Y坐标 // lv_obj_set_size(label, 60, 20); // 设置控件大小 lv_label_set_text(label, "Counter"); // 初始显示 0 // lv_obj_center(label); // 居中显示 lv_obj_align(label, LV_ALIGN_CENTER, 0, -50); // 居中显示后，向上偏移50 }}/** * @brief 按钮事件回调函数 */static void btn_event_callback(lv_event_t* event){ static uint32_t counter = 1; lv_obj_t* btn = lv_event_get_target(event); //获取事件对象 if (btn != NULL) { lv_obj_t* btn_parent = lv_obj_get_parent(btn); lv_obj_t* label = lv_obj_get_child(btn_parent, 0); lv_label_set_text_fmt(label, "%d", counter); //设置显示内容 lv_obj_align(label, LV_ALIGN_CENTER, 0, -50); // 居中显示后，向上偏移50 counter++; }}/** * @brief 创建按钮 */void lvgl_button_test(){ /* 在当前界面中创建一个按钮 */ lv_obj_t* btn = lv_btn_create(lv_scr_act()); // 创建Button对象 if (btn != NULL) { lv_obj_set_size(btn, 80, 20); // 设置对象宽度和高度 // lv_obj_set_pos(btn, 90, 200); // 设置按钮的X和Y坐标 lv_obj_add_event_cb(btn, btn_event_callback, LV_EVENT_CLICKED, NULL); // 给对象添加CLICK事件和事件处理回调函数 lv_obj_align(btn, LV_ALIGN_CENTER, 0, 50); // 居中显示后，向下偏移50 lv_obj_t* btn_label = lv_label_create(btn); // 基于Button对象创建Label对象 if (btn_label != NULL) { lv_label_set_text(btn_label, "button"); // 设置显示内容 lv_obj_center(btn_label); // 对象居中显示 } }}static void create_demo_application(void){ /* 加载标签 */ lvgl_lable_test(); /* 加载按钮 */ lvgl_button_test();}static void lv_tick_task(void *arg) { (void) arg; lv_tick_inc(LV_TICK_PERIOD_MS);}