This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
是不是我手头的bbb不支持saveenv命令?我买的是Embest国产的BeagleBone Black Rev C element14版本的,我看了一下
uboot的版本如下,网上搜了一下,有的说是和eMMC访问有关,说是有些版本不支持saveenv命令,需要去改什么uEnv.txt文件,这个哪里有官方的说法?我去Enbest的论坛转了一下,也没看到什么正式的说明。请问是否有同道碰到过类似的问题的?
如果没有saveenv命令,我用TI的SDK的setup脚本设置tftp/nfs环境会失败啊,这个embest的板子的uboot为何会这样?!
=> version
U-Boot 2015.10-00001-g143c9ee (Nov 06 2015 - 15:27:19 -0600)
arm-linux-gnueabihf-gcc (Linaro GCC 4.9-2015.05) 4.9.3 20150413 (prerelease)
GNU ld (GNU Binutils) Linaro 2014.11-3-git 2.24.0.20141017
=> help
? - alias for 'help'
askenv - get environment variables from stdin
base - print or set address offset
bdinfo - print Board Info structure
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
bootz - boot Linux zImage image from memory
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
dfu - Device Firmware Upgrade
dhcp - boot image via network using DHCP/TFTP protocol
dm - Driver model low level access
echo - echo args to console
editenv - edit environment variable
eeprom - EEPROM sub-system
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 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'
gpio - query and control gpio pins
gpt - GUID Partition Table
help - print command description/usage
i2c - I2C sub-system
iminfo - print header information for application image
imxtract- extract a part of a multi-image
itest - return true/false on integer compare
load - load binary file from a filesystem
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loadx - load binary file over serial line (xmodem mode)
loady - load binary file over serial line (ymodem mode)
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
mw - memory write (fill)
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
reset - Perform RESET of the CPU
run - run commands in an environment variable
save - save file to a filesystem
setenv - set environment variables
sf - SPI flash sub-system
showvar - print local hushshell variables
size - determine a file's size
sleep - delay execution for some time
source - run script from memory
spl - SPL configuration
sspi - SPI utility command
test - minimal test like /bin/sh
tftpboot- boot image via network using TFTP protocol
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
saveenv只是个命令,板子上有没有nand flash,你saveenv时要把环境变量存在哪里呢?总得有实现吧。
你的办卡上应该只有emmc卡,个人觉得放在uEnv.txt中会相对来说方便些。