更新SD卡文件列表到tablew中的list

c 复制代码

#include "SD.h"
#include "ff.h"
#include "usart.h"
#include <string.h>
#include "lvgl.h"
#include <stdio.h>
// 全局 FatFs 对象和文件操作变量
FATFS fs;           /* FatFs 文件系统对象 */
FIL fil;            /* 文件对象 */
FRESULT fres;       /* FatFs 函数返回结果 */

// 文件列表存储
char file_list[MAX_FILES][MAX_NAME_LEN];
int file_count = 0;

// 打印文件信息（内部使用）
static void print_file_info(FILINFO* fno);

void List_SD_Files(void)
{
    DIR dir;
    FILINFO fno;
    UINT i = 0;
		char path[] = "0:";
    // 挂载文件系统
    fres = f_mount(&fs, path, 1);
    if (fres != FR_OK) {
        HAL_UART_Transmit(&huart1, (uint8_t*)"failed", 6, 1000);
        return;
    }
    HAL_UART_Transmit(&huart1, (uint8_t*)"successful", 10, 1000);
    HAL_UART_Transmit(&huart1, (uint8_t*)"\r\n", 2, 1000);

    // 打开根目录
    fres = f_opendir(&dir, path);
    if (fres != FR_OK) {
        HAL_UART_Transmit(&huart1, (uint8_t*)"failedFF", 8, 1000);
        return;
    }

    // 读取目录项
    while (1) {
        fres = f_readdir(&dir, &fno);
        if (fres != FR_OK || fno.fname[0] == 0) break;
        if (strcmp(fno.fname, ".") == 0 || strcmp(fno.fname, "..") == 0) continue;
        print_file_info(&fno);
    }

    // 清理资源
    f_closedir(&dir);
    f_mount(NULL, path, 0);
}

static void print_file_info(FILINFO* fno)
{
    // 打印文件名
    HAL_UART_Transmit(&huart1, (uint8_t*)fno->fname, strlen(fno->fname), 1000);
    strncpy(file_list[file_count], fno->fname, MAX_NAME_LEN - 1);
    file_list[file_count][MAX_NAME_LEN - 1] = '\0';
    file_count++;
    HAL_UART_Transmit(&huart1, (uint8_t*)"\r\n", 2, 1000);
}

int SD_ReadFile(char* flname)
{
    char path[] = "0:";
    char line[100];

    // 挂载文件系统
    fres = f_mount(&fs, path, 1);
    if (fres != FR_OK) return (int)fres;

    // 打开文件
    fres = f_open(&fil, flname, FA_READ);
    if (fres != FR_OK) {
        f_mount(NULL, path, 0);
        return (int)fres;
    }

    // 逐行读取
    while (f_gets(line, sizeof(line), &fil)) {
        HAL_UART_Transmit(&huart1, (uint8_t*)line, strlen(line), 1000);
        HAL_UART_Transmit(&huart1, (uint8_t*)"\r\n", 2, 1000);
    }

    // 关闭文件并卸载
    f_close(&fil);
    f_mount(NULL, path, 0);
    return (int)fres;
}

int SD_WriteFile(char* newfname, char* data, UINT* bw)
{
    char path[] = "0:";
    UINT len = strlen(data);

    // 挂载文件系统
    fres = f_mount(&fs, path, 1);
    if (fres != FR_OK) return (int)fres;

    // 创建/打开文件
    fres = f_open(&fil, newfname, FA_CREATE_ALWAYS | FA_WRITE | FA_READ);
    if (fres != FR_OK) {
        f_mount(NULL, path, 0);
        return (int)fres;
    }

    // 写入数据
    fres = f_write(&fil, data, len, bw);
    if (fres == FR_OK) {
        HAL_UART_Transmit(&huart1, (uint8_t*)"Write successful", 16, 1000);
        HAL_UART_Transmit(&huart1, (uint8_t*)"\r\n", 2, 1000);
    } else {
        HAL_UART_Transmit(&huart1, (uint8_t*)"Write failed", 12, 1000);
        HAL_UART_Transmit(&huart1, (uint8_t*)"\r\n", 2, 1000);
    }

    // 刷新并关闭
    f_sync(&fil);
    f_close(&fil);
    f_mount(NULL, path, 0);
    return (int)fres;
}
// 将SD卡文件列表更新到LVGL界面 - 仅显示文件名
void Update_SD_Files_To_LVGL(lv_obj_t* tab_page)
{
    if (tab_page == NULL) {
        //HAL_UART_Transmit(&huart1, (uint8_t*)"Tab page is NULL\r\n", 18, 1000);
        return;
    }
    
    // 清除tab页面中的所有子对象
    lv_obj_clean(tab_page);
    
    // 为每个文件创建标签（只显示文件名）
    for (int i = 1; i < file_count && i < MAX_FILES; i++) {
        lv_obj_t* file_label = lv_label_create(tab_page);
        lv_label_set_text(file_label, file_list[i]);
        
        // 设置样式：文件名使用等宽字体
        lv_obj_set_style_text_font(file_label, &lv_font_montserrat_14, 0);
        lv_obj_set_style_text_color(file_label, lv_color_hex(0x000000), 0);
        
        // 垂直排列，每行间隔25像素
        lv_obj_align(file_label, LV_ALIGN_TOP_LEFT, 10, 10 + (i * 25));
    }
    
    // 如果没有文件，显示提示信息
    if (file_count == 0) {
        lv_obj_t* no_file_label = lv_label_create(tab_page);
        lv_label_set_text(no_file_label, "No files found");
        lv_obj_set_style_text_color(no_file_label, lv_color_hex(0x888888), 0);
        lv_obj_align(no_file_label, LV_ALIGN_CENTER, 0, 0);
    }
    
    //HAL_UART_Transmit(&huart1, (uint8_t*)"Files displayed on LVGL (only filenames)\r\n", 42, 1000);
}

.h

c 复制代码

#ifndef FATFS_UTIL_H
#define FATFS_UTIL_H

#include "ff.h"
#include "main.h"
#include "lvgl.h"

#define MAX_FILES    500    // 最大文件数
#define MAX_NAME_LEN 50     // 文件名最大长度（包含 '\0'）

extern char file_list[MAX_FILES][MAX_NAME_LEN];
extern int file_count;

void List_SD_Files(void);
int SD_ReadFile(char* flname);
int SD_WriteFile(char* newfname, char* data, UINT* bw);
// LVGL界面更新函数
void Update_SD_Files_To_LVGL(lv_obj_t* tabview);

#endif /* FATFS_UTIL_H */

调用List_SD_Files()后调用Update_SD_Files_To_LVGL(guider_ui.screen_1_list_1);即可显示,传入要传入的图框