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- --[[
- @module tfcard_app
- @summary TF卡文件操作测试模块
- @version 1.0.0
- @date 2025.08.25
- @author 王棚嶙
- @usage
- 本文件为TF卡的文件操作测试流程:
- 1. 创建目录
- 2. 创建并写入文件
- 3. 检查文件是否存在
- 4. 获取文件大小
- 5. 读取文件内容
- 6. 启动计数文件操作
- 7. 文件追加测试
- 8. 按行读取测试
- 9. 读取后关闭文件
- 10. 文件重命名
- 11. 列举目录内容
- 12. 删除文件
- 13. 删除目录
- 本文件没有对外接口,直接在main.lua中require "tfcard_app"就可以加载运行
- ]]
- -- 开始进行主测试流程。
- local function tfcard_main_task()
- -- 供电控制 (Air8101专用)
- --gpio13为8101TF卡的供电控制引脚,在挂载前需要设置为高电平,不能省略
- gpio.setup(13, 1)
-
-
- -- ########## 开始进行tf卡挂载 ##########
- local mount_ok, mount_err = fatfs.mount(fatfs.SDIO, "/sd", 24 * 1000 * 1000)
- if mount_ok then
- log.info("fatfs.mount", "挂载成功", mount_err)
- else
- log.error("fatfs.mount", "挂载失败", mount_err)
- goto resource_cleanup
- end
- -- ########## 获取SD卡的可用空间信息并打印。 ##########
- data, err = fatfs.getfree("/sd")
- if data then
- --打印SD卡的可用空间信息
- log.info("fatfs", "getfree", json.encode(data))
- else
- --打印错误信息
- log.info("fatfs", "getfree", "err", err)
- goto resource_cleanup
- end
- -- 列出所有挂载点,如不需要,可注释掉。
- data = io.lsmount()
- log.info("fs", "lsmount", json.encode(data))
- -- ########## 功能: 启用fatfs调试模式 ##########
- -- 若挂载失败,可以尝试打开调试信息,查找原因.(设置调试模式)
- -- fatfs.debug(1)
- -- 执行tfcard文件操作演示
- log.info("文件操作", "===== 开始文件操作 =====")
- dir_path = "/sd/io_test"
- -- 1. 创建目录
- if io.mkdir(dir_path) then
- log.info("io.mkdir", "目录创建成功", "路径:" .. dir_path)
- else
- -- 检查是否目录已存在
- if io.exists(dir_path) then
- log.warn("io.mkdir", "目录已存在,跳过创建", "路径:" .. dir_path)
- else
- log.error("io.mkdir", "目录创建失败且目录不存在", "路径:" .. dir_path)
- goto resource_cleanup
- end
- end
- -- 2. 创建并写入文件
- file_path = dir_path .. "/boottime"
- file = io.open(file_path, "wb")
- if file then
- file:write("这是io库API文档示例的测试内容")
- file:close()
- --在LuatOS文件操作中,执行file:close()是必须且关键的操作,它用于关闭文件句柄,释放资源,并确保数据被正确写入磁盘。
- -- 如果不执行file:close(),可能会导致数据丢失、文件损坏或其他不可预测的问题。
- log.info("文件创建", "文件写入成功", "路径:" .. file_path)
- else
- log.error("文件创建", "文件创建失败", "路径:" .. file_path)
- goto resource_cleanup
- end
- -- 3. 检查文件是否存在
- if io.exists(file_path) then
- log.info("io.exists", "文件存在", "路径:" .. file_path)
- else
- log.error("io.exists", "文件不存在", "路径:" .. file_path)
- goto resource_cleanup
- end
- -- 4. 获取文件大小
- file_size = io.fileSize(file_path)
- if file_size then
- log.info("io.fileSize", "文件大小:" .. file_size .. "字节", "路径:" .. file_path)
- else
- log.error("io.fileSize", "获取文件大小失败", "路径:" .. file_path)
- goto resource_cleanup
- end
- -- 5. 读取文件内容
- file = io.open(file_path, "rb")
- if file then
- content = file:read("*a")
- log.info("文件读取", "路径:" .. file_path, "内容:" .. content)
- file:close()
- else
- log.error("文件操作", "无法打开文件读取内容", "路径:" .. file_path)
- goto resource_cleanup
- end
- -- 6. 启动计数文件操作
- count = 0
- --以只读模式打开文件
- file = io.open(file_path, "rb")
- if file then
- data = file:read("*a")
- log.info("启动计数", "文件内容:", data, "十六进制:", data:toHex())
- count = tonumber(data) or 0
- file:close()
- else
- log.warn("启动计数", "文件不存在或无法打开")
- end
- log.info("启动计数", "当前值:", count)
- count=count + 1
- log.info("启动计数", "更新值:", count)
- file = io.open(file_path, "wb")
- if file then
- file:write(tostring(count))
- file:close()
- log.info("文件写入", "路径:" .. file_path, "内容:", count)
- else
- log.error("文件写入", "无法打开文件", "路径:" .. file_path)
- goto resource_cleanup
- end
- -- 7. 文件追加测试
- append_file = dir_path .. "/test_a"
- -- 清理旧文件
- os.remove(append_file)
- -- 创建并写入初始内容
- file = io.open(append_file, "wb")
- if file then
- file:write("ABC")
- file:close()
- log.info("文件创建", "路径:" .. append_file, "初始内容:ABC")
- else
- log.error("文件创建", "无法创建文件", "路径:" .. append_file)
- goto resource_cleanup
- end
- -- 追加内容
- file = io.open(append_file, "a+")
- if file then
- file:write("def")
- file:close()
- log.info("文件追加", "路径:" .. append_file, "追加内容:def")
- else
- log.error("文件追加", "无法打开文件进行追加", "路径:" .. append_file)
- goto resource_cleanup
- end
- -- 验证追加结果
- file = io.open(append_file, "r")
- if file then
- data = file:read("*a")
- log.info("文件验证", "路径:" .. append_file, "内容:" .. data, "结果:",
- data == "ABCdef" and "成功" or "失败")
- file:close()
- else
- log.error("文件验证", "无法打开文件进行验证", "路径:" .. append_file)
- goto resource_cleanup
- end
- -- 8. 按行读取测试
- line_file = dir_path .. "/testline"
- file = io.open(line_file, "w")
- if file then
- file:write("abc\n")
- file:write("123\n")
- file:write("wendal\n")
- file:close()
- log.info("文件创建", "路径:" .. line_file, "写入3行文本")
- else
- log.error("文件创建", "无法创建文件", "路径:" .. line_file)
- goto resource_cleanup
- end
- -- 按行读取文件
- file = io.open(line_file, "r")
- if file then
- log.info("按行读取", "路径:" .. line_file, "第1行:", file:read("*l"))
- log.info("按行读取", "路径:" .. line_file, "第2行:", file:read("*l"))
- log.info("按行读取", "路径:" .. line_file, "第3行:", file:read("*l"))
- file:close()
- else
- log.error("按行读取", "无法打开文件", "路径:" .. line_file)
- goto resource_cleanup
- end
- -- 9. 文件重命名
- old_path = append_file
- new_path = dir_path .. "/renamed_file.txt"
- success, err = os.rename(old_path, new_path)
- if success then
- log.info("os.rename", "文件重命名成功", "原路径:" .. old_path, "新路径:" .. new_path)
- -- 验证重命名结果
- if io.exists(new_path) and not io.exists(old_path) then
- log.info("验证结果", "重命名验证成功", "新文件存在", "原文件不存在")
- else
- log.error("验证结果", "重命名验证失败")
- end
- else
- log.error("os.rename", "重命名失败", "错误:" .. tostring(err), "原路径:" .. old_path)
- goto resource_cleanup
- end
- -- 10. 列举目录内容
- log.info("目录操作", "===== 开始目录列举 =====")
- ret, data = io.lsdir(dir_path, 50, 0) -- 50表示最多返回50个文件,0表示从目录开头开始
- if ret then
- log.info("fs", "lsdir", json.encode(data))
- else
- log.info("fs", "lsdir", "fail", ret, data)
- goto resource_cleanup
- end
- -- 11. 删除文件测试
- -- 测试删除renamed_file.txt文件
- if os.remove(new_path) then
- log.info("os.remove", "文件删除成功", "路径:" .. new_path)
- -- 验证renamed_file.txt删除结果
- if not io.exists(new_path) then
- log.info("验证结果", "renamed_file.txt文件删除验证成功")
- else
- log.error("验证结果", "renamed_file.txt文件删除验证失败")
- end
- else
- log.error("io.remove", "renamed_file.txt文件删除失败", "路径:" .. new_path)
- goto resource_cleanup
- end
- -- 测试删除testline文件
- if os.remove(line_file) then
- log.info("os.remove", "testline文件删除成功", "路径:" .. line_file)
- -- 验证删除结果
- if not io.exists(line_file) then
- log.info("验证结果", "testline文件删除验证成功")
- else
- log.error("验证结果", "testline文件删除验证失败")
- end
- else
- log.error("io.remove", "testline文件删除失败", "路径:" .. line_file)
- goto resource_cleanup
- end
- if os.remove(file_path) then
- log.info("os.remove", "文件删除成功", "路径:" .. file_path)
- -- 验证删除结果
- if not io.exists(file_path) then
- log.info("验证结果", "boottime文件删除验证成功")
- else
- log.error("验证结果", "boottime文件删除验证失败")
- end
- else
- log.error("io.remove", "boottime文件删除失败", "路径:" .. file_path)
- goto resource_cleanup
- end
- -- 12. 删除目录(不能删除非空目录,所以在删除目录前要确保目录内没有文件或子目录)
- if io.rmdir(dir_path) then
- log.info("io.rmdir", "目录删除成功", "路径:" .. dir_path)
- -- 验证删除结果
- if not io.exists(dir_path) then
- log.info("验证结果", "目录删除验证成功")
- else
- log.error("验证结果", "目录删除验证失败")
- end
- else
- log.error("io.rmdir", "目录删除失败", "路径:" .. dir_path)
- goto resource_cleanup
- end
- log.info("文件操作", "===== 文件操作完成 =====")
- -- ########## 功能: 收尾功能演示##########
- -- 卸载文件系统
- ::resource_cleanup::
- log.info("结束", "开始执行关闭操作...")
- -- 如已挂载需先卸载文件系统
- if mount_ok then
- if fatfs.unmount("/sd") then
- log.info("文件系统", "卸载成功")
- else
- log.error("文件系统", "卸载失败")
- end
- end
- end
- sys.taskInit(tfcard_main_task)
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