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---[[
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-@module LITTLE_FLASh_NAND
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-@summary LITTLE_FLASh_NAND测试功能模块
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-@version 1.0
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-@date 2025.9.05
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-@author 马亚丹
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-@usage
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-本demo演示的功能为：使用Air8000核心板通过SPI库实现对 NAND Flash的操作，演示读数据写数据、删除数据等操作。
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-以 Air8000核心板为例, 接线如下:
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-Air8000 AirSPINAND_1000配件版
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-GND(任意) GND
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-VDD_EXT VCC
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-GPIO12/SPI1_CS CS,片选
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-SPI1_SLK CLK,时钟
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-SPI1_MOSI DI,主机输出,从机输入
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-SPI1_MISO DO,主机输入,从机输出
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---使用SPI1，硬件SPI CS接在gpio12上
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-
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-运行核心逻辑：
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-1.以对象的方式配置参数，初始化启用SPI，返回SPI对象
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-2.用SPI对象初始化flash设备，返回flash设备对象
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-3.用lf库挂载flash设备对象为文件系统
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-4.读取文件系统的信息，以确认内存情况
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-5.操作文件读写，并验证写入一致性，追加文件等。
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-
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-]]
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-
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--- SPI配置参数
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-local SPI_ID = 1 -- SPI总线ID，根据实际情况修改
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-local CS_PIN = 12 -- CS引脚，根据实际情况修改
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-local CPHA = 0 -- 时钟相位
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-local CPOL = 0 -- 时钟极性
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-local data_Width = 8 -- 数据宽度(位)
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-local bandrate = 2*1000*1000 -- 波特率(Hz)，初始化为2MHz
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-
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-
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--- 1. 以对象方式设置并启用 SPI，返回设备对象
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-local function spiDev_init_func()
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- log.info("lf_fs", "SPI_ID", SPI_ID, "CS_PIN", CS_PIN)
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-
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- --以对象的方式初始化spi，高位在前，主模式，全双工模式
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- local spi_device = spi.deviceSetup(SPI_ID, CS_PIN, CPHA, CPOL, data_Width, bandrate, spi.MSB, 1, 0)
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-
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- log.info("硬件spi", "初始化，波特率:", spi_device, bandrate)
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- if not spi_device then
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- log.error("SPI初始化", "失败")
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- return nil
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- end
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- log.info("SPI初始化", "成功，波特率:20MHz")
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- return spi_device
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-end
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-
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-
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--- 2. 初始化Flash设备，返回设备对象
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-local function init_flash_device(spi_device)
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- log.info("Flash初始化", "开始")
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- local flash_device = lf.init(spi_device)
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- if not flash_device then
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- log.error("Flash初始化", "失败")
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- return nil
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- end
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- log.info("Flash初始化", "成功，设备:", flash_device)
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- return flash_device
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-end
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-
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--- 3. 挂载文件系统
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-local function mount_filesystem(flash_device, mount_point)
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- log.info("文件系统", "开始挂载:", mount_point)
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-
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- -- 检查是否支持挂载功能
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- if not lf.mount then
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- log.error("文件系统", "lf模块不支持挂载功能")
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- return false
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- end
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-
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- -- 尝试挂载
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- local mount_ok = lf.mount(flash_device, mount_point)
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- if not mount_ok then
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- log.warn("文件系统lf", "挂载失败，尝试重新挂载...")
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- mount_ok = lf.mount(flash_device, mount_point)
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- if not mount_ok then
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- log.error("文件系统", "仍挂载失败")
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- return false
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- end
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- end
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-
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- log.info("文件系统", "挂载成功:", mount_point)
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- return true
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-end
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-
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--- 4. 打印文件系统信息
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-local function print_filesystem_info(mount_point)
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- log.info("文件系统信息", "开始查询:", mount_point)
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-
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- -- 获取文件系统详细信息，总块数/已用块数等
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- local ok, total_blocks, used_blocks, block_size, fs_type = fs.fsstat(mount_point)
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- if ok then
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- log.info(" 总block数:", total_blocks)
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- log.info(" 已用block数:", used_blocks)
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- log.info(" block大小:", block_size, "字节")
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- log.info(" 文件系统类型:", fs_type)
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- else
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- log.warn(" 无法获取详细信息")
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- end
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-end
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-
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--- 5. 执行文件操作测试
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-local function test_file_operations(mount_point)
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- log.info("文件操作测试", "开始")
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-
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- -- 测试写入文件
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- local test_file = mount_point .. "/test.txt"
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- local f, err = io.open(test_file, "w")
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- if not f then
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- log.error(" 写入失败", test_file, "错误:", err)
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- return false
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- end
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- local write_data = "当前时间: " .. os.date()
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- f:write(write_data)
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- f:close()
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- log.info(" 写入成功", test_file, "内容:", write_data)
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-
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- -- 测试读取文件
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- local read_data, read_err = io.readFile(test_file)
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- if not read_data then
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- log.error(" 读取失败", test_file, "错误:", read_err)
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- return false
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- end
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- log.info(" 读取成功", test_file, "内容:", read_data)
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-
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- -- 验证内容一致性
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- if read_data ~= write_data then
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- log.warn(" 内容不一致", "写入:", write_data, "读取:", read_data)
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- end
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-
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- -- 测试文件追加
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- local append_file = mount_point .. "/append.txt"
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- os.remove(append_file) -- 清除旧文件
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- io.writeFile(append_file, "LuatOS 测试") -- 初始写入
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-
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- local f_append, append_err = io.open(append_file, "a+")
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- if not f_append then
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- log.error(" 追加失败", append_file, "错误:", append_err)
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- return false
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- end
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- local append_data = " - 追加时间: " .. os.date()
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- f_append:write(append_data)
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- -- 执行完操作后,一定要关掉文件
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- f_append:close()
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-
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- local final_data = io.readFile(append_file)
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- log.info(" 追加后内容:", final_data)
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-
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- log.info("文件操作测试", "完成")
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-
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- return true
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-end
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-
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--- 7. 关闭SPI设备，成功返回0
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-local function spi_close_func()
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- log.info("关闭spi", spi_device:close())
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-end
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-
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--- 主任务函数：按流程调用各功能函数
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-local function spinand_test_func()
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- --1.判断SPI初始化
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- spi_device = spiDev_init_func()
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- if not spi_device then
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- log.error("主流程", "SPI初始化失败，终止")
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- return
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- end
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-
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- -- 流程2：初始化Flash设备
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- local flash_device = init_flash_device(spi_device)
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- if not flash_device then
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- log.error("主流程", "Flash初始化失败，终止")
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- spi_close_func()
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- return
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- end
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-
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- -- 流程3：挂载文件系统
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- local mount_point = "/little_flash"
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- if not mount_filesystem(flash_device, mount_point) then
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- log.error("主流程", "文件系统挂载失败，终止")
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- spi_close_func()
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- return
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- end
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-
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- -- 流程4：打印文件系统信息
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- print_filesystem_info(mount_point)
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-
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- -- 流程5：执行文件操作测试
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- if not test_file_operations(mount_point) then
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- log.warn("主流程", "文件操作测试部分失败")
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- end
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-
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- -- 6.关闭SPI设备
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- spi_close_func()
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-end
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-
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-sys.taskInit(spinand_test_func)
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马亚丹