132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/**
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****************************************************************************************************
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* @file lvgl_port.c
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* @author HiFi Player Project
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* @version V1.0
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* @date 2026-01-01
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* @brief LVGL 8.x 移植层
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*
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* 移植要点：
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* 1. 绘图缓冲区必须放在内部 RAM，并带 DMA 能力（SPI DMA 不能直接读 PSRAM）。
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* 2. flush_cb 中把 LVGL 的小端 RGB565 数据做字节交换，再交给 spilcd_flush()。
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* 3. spilcd_flush() 是阻塞的（等 SPI 传输完成回调），因此这里调用后可以直接
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* lv_disp_flush_ready()，实现简单可靠。
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****************************************************************************************************
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*/
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#include "lvgl_port.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_heap_caps.h"
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#include "esp_log.h"
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#include "esp_timer.h"
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#include "lvgl.h"
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#include "spilcd.h"
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#define TAG "lvgl_port"
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#define DISP_HOR_RES SPI_LCD_H_RES /* 320 */
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#define DISP_VER_RES SPI_LCD_V_RES /* 240 */
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#define DRAW_BUF_LINES 40 /* 单缓冲区高度（40 行约 25KB） */
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#define LVGL_TASK_STACK (8 * 1024)
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#define LVGL_TASK_PRIO 4
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static lv_disp_draw_buf_t s_draw_buf;
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static lv_disp_drv_t s_disp_drv;
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static lv_color_t *s_draw_buf_mem = NULL;
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static esp_timer_handle_t s_tick_timer = NULL;
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/**
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* @brief LVGL 刷新回调：把绘制好的区域送到 SPI LCD
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*/
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static void disp_flush_cb(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
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{
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int32_t width = lv_area_get_width(area);
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int32_t height = lv_area_get_height(area);
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uint32_t pixels = (uint32_t)width * (uint32_t)height;
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uint16_t *buf = (uint16_t *)color_p;
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/* LVGL 内部是 RGB565 小端，ST7789 要求高字节在前，这里原地交换 */
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for (uint32_t i = 0; i < pixels; i++)
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{
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buf[i] = (uint16_t)((buf[i] << 8) | (buf[i] >> 8));
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}
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/* x2 / y2 使用“不包含”的坐标 */
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spilcd_flush((uint16_t)area->x1, (uint16_t)area->y1,
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(uint16_t)(area->x2 + 1), (uint16_t)(area->y2 + 1), buf);
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lv_disp_flush_ready(drv);
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}
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/**
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* @brief LVGL 1ms 时基
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*/
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static void lv_tick_cb(void *arg)
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{
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(void)arg;
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lv_tick_inc(1);
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}
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esp_err_t lvgl_port_init(void)
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{
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lv_init();
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/* ---------------- 绘图缓冲区（内部 DMA RAM） ---------------- */
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size_t pixel_count = (size_t)DISP_HOR_RES * DRAW_BUF_LINES;
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s_draw_buf_mem = (lv_color_t *)heap_caps_malloc(pixel_count * sizeof(lv_color_t),
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MALLOC_CAP_DMA | MALLOC_CAP_INTERNAL);
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if (s_draw_buf_mem == NULL)
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{
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ESP_LOGE(TAG, "no memory for LVGL draw buffer");
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return ESP_ERR_NO_MEM;
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}
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lv_disp_draw_buf_init(&s_draw_buf, s_draw_buf_mem, NULL, pixel_count);
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/* ---------------- 注册显示设备 ---------------- */
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lv_disp_drv_init(&s_disp_drv);
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s_disp_drv.hor_res = DISP_HOR_RES;
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s_disp_drv.ver_res = DISP_VER_RES;
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s_disp_drv.draw_buf = &s_draw_buf;
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s_disp_drv.flush_cb = disp_flush_cb;
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lv_disp_drv_register(&s_disp_drv);
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/* ---------------- 1ms 时基 ---------------- */
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const esp_timer_create_args_t timer_args = {
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.callback = lv_tick_cb,
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.name = "lv_tick",
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};
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ESP_ERROR_CHECK(esp_timer_create(&timer_args, &s_tick_timer));
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ESP_ERROR_CHECK(esp_timer_start_periodic(s_tick_timer, 1000)); /* 1000us */
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ESP_LOGI(TAG, "LVGL %d.%d.%d ready, draw buffer %u px",
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LVGL_VERSION_MAJOR, LVGL_VERSION_MINOR, LVGL_VERSION_PATCH,
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(unsigned)pixel_count);
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return ESP_OK;
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}
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static void lvgl_task(void *arg)
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{
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(void)arg;
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while (1)
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{
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lv_timer_handler();
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vTaskDelay(pdMS_TO_TICKS(5));
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}
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}
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void lvgl_port_start(void)
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{
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if (xTaskCreate(lvgl_task, "lvgl", LVGL_TASK_STACK, NULL, LVGL_TASK_PRIO, NULL) != pdPASS)
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{
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ESP_LOGE(TAG, "create lvgl task failed");
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}
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}
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