u-boot中的FAT命令

1. Source Code

common/cmd_fat.c

此文件中定义了四个命令：fatload,fatls,fatinfo是定义”#define CONFIG_CMD_FAT“后就包括了。而fatwrite是需要再定义”#defineCONFIG_FAT_WRITE“才会出现。

2. Usage

在使用FAT相关命令的时候，一定会有FAT文件系统的存储设备，此处举例使用U盘。

U-Bootfatinfousb 0

Interface: USB

Device 0: Vendor: Kingston Rev: PMAP Prod: DataTraveler G3

Type: Removable Hard Disk

Capacity: 7441.6 MB = 7.2 GB (15240576 x 512)

Filesystem: FAT32 “KINGSTON ”

U-Bootfatlsusb 0

166 autorun.inf

39334 tbi.png

43134 tbi_2.png

43006 tms.png

55191 tck.png

57357 rtck.png

53981 tdo.png

7 file(s), 0 dir(s)

U-Bootfatloadusb 0 0x20000000 tbi.png

reading tbi.png

39334 bytes read in 161ms (244.3 KiB/s)

3. Source Code go through

3.1 fatls — do_fat_ls common/cmd_fat.c — do_ls fs/fs.c — fs_set_blk_dev fs/fs.c — fs_ls fs/fs.c — return 0;

3.1.1 fs_set_blk_dev fs/fs.c — get_device_and_partition disk/part.c — (callback: fstype_info-probe) fs/fs.c

3.1.2 fs_ls fs/fs.c — fs_get_info fs/fs.c — (callback: fstype_info-ls) fs/fs.c

3.2 fatinfo — do_fat_fsinfo common/cmd_fat.c — get_device_and_partition disk/part.c — fat_set_blk_dev fs/fat/fat.c — file_fat_detectfs fs/fat/fat.c

3.2.1 fat_set_blk_dev fs/fat/fat.c — disk_read fs/fat/fat.c

3.2.2 file_fat_detectfs fs/fat/fat.c — dev_print disk/part.c — read_bootsectandvi fs/fat/fat.c

3.3 fatload — do_fat_fsload — do_load fs/fs.c — fs_set_blk_dev fs/fs.c — fs_read (callback: fstype_info-read)