Uboot使用查看uboot支持命令-RK3568开发板

进入 uboot 命令行，输入“？”或者“help”,然后输入回车，可以查看当前 uboot 支
持的命令。
=> ?
? - alias for 'help' android_print_hdr- print android image header
atags - Dump all atags
base - print or set address offset
bdinfo - print Board Info structure
bidram_dump- Dump bidram layout
boot - boot default, i.e., run 'bootcmd' boot_android- Execute the Android Bootloader flow. boot_fit- Boot FIT Image from memory or boot/recovery partition
bootavb - Execute the Android avb a/b boot flow. bootd - boot default, i.e., run 'bootcmd' booti - boot arm64 Linux Image image from memory
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
bootrkp - Boot Linux Image from rockchip image type
bootz - boot Linux zImage image from memory
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
crypto_sum- crypto checksum engine
dhcp - boot image via network using DHCP/TFTP protocol
dm - Driver model low level access
download- enter rockusb/bootrom download mode
dtimg - manipulate dtb/dtbo Android image
dump_irqs- Dump IRQs
dump_resource- dump resource list
echo - echo args to console
editenv - edit environment variable
env - environment handling commands
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
fastboot- use USB or UDP Fastboot protocol
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls - list files in a directory (default /)
fatsize - determine a file's size
fatwrite- write file into a dos filesystem
fdt - flattened device tree utility commands
fstype - Look up a filesystem type
go - start application at address 'addr' gpt - GUID Partition Table
help - print command description/usage
iomem - Show iomem data by device compatible(high priority) or node name
lcdputs - print string on video framebuffer
load - load binary file from a filesystem
loop - infinite loop on address range
ls - list files in a directory (default /)
md - memory display
mdio - MDIO utility commands
mii - MII utility commands
mm - memory modify (auto-incrementing address)
mmc - MMC sub system
mmcinfo - display MMC info
mtd - MTD utils
mtd_blk - MTD Block device sub-system
mw - memory write (fill)
nand - NAND sub-system
nboot - boot from NAND device
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
part - disk partition related commands
ping - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
pxe - commands to get and boot from pxe files
rbrom - Perform RESET of the CPU
reboot - Perform RESET of the CPU, alias of 'reset' reset - Perform RESET of the CPU
rkimgtest- Test if storage media have rockchip image
rockchip_show_bmp- load and display bmp from resource partition
rockchip_show_logo- load and display log from resource partition
rockusb - Use the rockusb Protocol
run - run commands in an environment variable
save - save file to a filesystem
setcurs - set cursor position within screen
setenv - set environment variables
showvar - print local hushshell variables
size - determine a file's size
source - run script from memory
sysboot - command to get and boot from syslinux files
sysmem_dump- Dump sysmem layout
sysmem_search- Search a available sysmem region
test - minimal test like /bin/sh
tftp - download image via network using TFTP protocol
tftpbootm- tftpbootm aosp/uImage/FIT image via network using TFTP protocol
tftpflash- flash image via network using TFTP protocol
tftpput - TFTP put command, for uploading files to a server
true - do nothing, successfully
ums - Use the UMS [USB Mass Storage]
usb - USB sub-system
usbboot - boot from USB device
version - print monitor, compiler and linker version
比如使用某个命令，需要了解某命令的详细用法，可以输入“？ 命令名”来
查询。比如，想要了解“mmc”命令的详细信息，则输入“? mmc”，如下所示：
=> ? mmc
mmc - MMC sub system
Usage:
mmc info - display info of the current MMC device
mmc read addr blk# cnt
mmc write addr blk# cnt
mmc erase blk# cnt
mmc rescan
mmc part - lists available partition on current mmc device
mmc dev [dev] [part] - show or set current mmc device [partition]
mmc list - lists available devices
mmc hwpartition [args...] - does hardware partitioning
arguments (sizes in 512-byte blocks):
[user [enh start cnt] [wrrel {on|off}]] - sets user data area attributes
[gp1|gp2|gp3|gp4 cnt [enh] [wrrel {on|off}]] - general purpose partition
[check|set|complete] - mode, complete set partitioning completed
WARNING: Partitioning is a write-once setting once it is set to complete. Power cycling is required to initialize partitions after set to complete. mmc testsecurestorage - test CA call static TA to store data in security
mmc testefuse - test CA call static TA,and TA read or write efuse
mmc rpmb read addr blk# cnt [address of auth-key] - block size is 256 bytes
mmc rpmb write addr blk# cnt