飞腾uboot和开源uboot并无大差异，故飞腾uboot固件命令可以直接从网上搜索开源uboot相关命令。

这里为了便于大家调试，将一些可能用到的命令说明一下。

在 Uboot 命令行下，输入 help 将打印所有的可用命令，复杂命令操作，通过命令 help 的方式获取具体说明。

1.help命令

输入 help，可以得到命令简易说明。

FT2004C#help
?         - alias for 'help'
base      - print or set address offset
bdinfo    - print Board Info structure
blkcache  - block cache diagnostics and control
boot      - boot default, i.e., run 'bootcmd'
bootd     - boot default, i.e., run 'bootcmd'
bootefi   - Boots an EFI payload from memory
bootelf   - Boot from an ELF image in memory
bootelf_ft- Boot from an ELF image in memory
booti     - boot Linux kernel 'Image' format from memory
bootm     - boot application image from memory
bootp     - boot image via network using BOOTP/TFTP protocol
bootvx    - Boot vxWorks from an ELF image
bootvx32  - Boot vxWorks from an 32bit ELF image/bin
bootz     - boot Linux zImage image from memory
cmp       - memory compare
coninfo   - print console devices and information
cp        - memory copy
crc32     - checksum calculation
dcache    - enable or disable data cache
dhcp      - boot image via network using DHCP/TFTP protocol
e1000     - Intel e1000 controller management
echo      - echo args to console
editenv   - edit environment variable
env       - environment handling commands
erase     - erase FLASH memory
exit      - exit script
ext2load  - load binary file from a Ext2 filesystem
ext2ls    - list files in a directory (default /)
ext4load  - load binary file from a Ext4 filesystem
ext4ls    - list files in a directory (default /)
ext4size  - determine a file's size
false     - do nothing, unsuccessfully
fatinfo   - print information about filesystem
fatload   - load binary file from a dos filesystem
fatls     - list files in a directory (default /)
fatmkdir  - create a directory
fatrm     - delete a file
fatsize   - determine a file's size
fatwrite  - write file into a dos filesystem
fdt       - flattened device tree utility commands
flashe    - erase QSPI FLASH  
flashw    - qspi flash write
flid      - print FLASH ID
flinfo    - print FLASH memory information
fstype    - Look up a filesystem type
go        - start application at address 'addr'
help      - print command description/usage
icache    - enable or disable instruction cache
iminfo    - print header information for application image
imxtract  - extract a part of a multi-image
itest     - return true/false on integer compare
ln        - Create a symbolic link
load      - load binary file from a filesystem
loadb     - load binary fil