Updating u-boot environment
I need to write a program or shell script that can update u-boot environment (e.g. MAC address).
Any pointers in how this may be done ?
Thanks!
Quoted 1 line · In message <[email protected]> you wrote:
I need to write a program or shell script that can update u-boot
environment (e.g. MAC address).
Quoted 1 line
Any pointers in how this may be done ?
A program or shell script in U-Boot? No program needed, as the "setenv" command is a builtin. Youc an put calls to the "setenv" or "askenv" in a text file (= shell script), use the mkimage tool (-T script) to make script image from it,. load it and run it using the "autoscr" command.
Under Linux, you can use the fw_setenv tool provided in tools/env/
Note that ithe MAC address is normally write protected, i. e. it cannot be changed once set. This is *intentional*.
Best regards,
Wolfgang Denk
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Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de "Send lawyers, guns and money..." - Lyrics from a Warren Zevon song
Quoted 19 lines · Wolfgang Denk
Quoted 3 lines · In message <[email protected]> you wrote:
I need to write a program or shell script that can update u-boot
environment (e.g. MAC address).
Quoted 3 lines
Any pointers in how this may be done ?
A program or shell script in U-Boot? No program needed, as the "setenv" command is a builtin. Youc an put calls to the "setenv" or "askenv" in a text file (= shell script), use the mkimage tool (-T script) to make script image from it,. load it and run it using the "autoscr" command.
Quoted 11 lines
Under Linux, you can use the
fw_setenvtool provided intools/env/Note that ithe MAC address is normally write protected, i. e. it cannot be changed once set. This is *intentional*.
Best regards,
Wolfgang Denk
Thank you for your response. I need to provide an interface to the folks at our manufacturing facility so that they can enter the MAC address for the MPC embedded controller and I can write it to the u-boot enviroment. Is is possible to write a "script" that can take user input and then write the MAC address ? I cannot seem to find a u-boot command that can take input from the user.
Thanks!
Muhammad
Quoted 4 lines · In message <[email protected]> you wrote:
Thank you for your response. I need to provide an interface to the folks at our manufacturing facility so that they can enter the MAC address for the MPC embedded controller and I can write it to the u-boot
U-Boot has such an interface builtin. It is the "setenv" command. It is trivial to write script (for example using "expect") to automate such command sequences.
And I already mentioned several other potential solutions for such a task.
Quoted 3 lines
enviroment. Is is possible to write a "script" that can take user input and then write the MAC address ? I cannot seem to find a u-boot command that can take input from the user.
Quoted 2 lines · Did you read my previous message? I
"setenv" command is a builtin. Youc an put calls to the "setenv" or "askenv" in a text file (= shell script), use the mkimage tool (-T
Did you look up what the "setenv" and "askenv" are doing? Especially "askenv"??
Best regards,
Wolfgang Denk
Signature · 4 lines
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"An open mind has but one disadvantage: it collects dirt."
- a saying at RPIQuoted 28 lines · Wolfgang Denk
Quoted 5 lines · In message <[email protected]> you wrote:
Thank you for your response. I need to provide an interface to the folks at our manufacturing facility so that they can enter the MAC address for the MPC embedded controller and I can write it to the u-boot
U-Boot has such an interface builtin. It is the "setenv" command. It is trivial to write script (for example using "expect") to automate such command sequences.
And I already mentioned several other potential solutions for such a task.
Quoted 5 lines
enviroment. Is is possible to write a "script" that can take user input and then write the MAC address ? I cannot seem to find a u-boot command that can take input from the user.
Did you read my previous message? I wrote:
Quoted 8 lines
Quoted 4 lines
"setenv" command is a builtin. Youc an put calls to the "setenv" or "askenv" in a text file (= shell script), use the mkimage tool (-T
Did you look up what the "setenv" and "askenv" are doing? Especially "askenv"??
Unfrotunately, I cannot find askenv in the u-boot version I am using; that is why I was asking if there is analternative to get input from user.
Quoted 7 lines
Best regards,
Wolfgang Denk
Quoted 3 lines · In message <[email protected]> you wrote:
Unfrotunately, I cannot find askenv in the u-boot version I am using; that is why I was asking if there is analternative to get input from user.
Add it to your board config file, recompile, and install the new image. What exactly is the problem?
Best regards,
Wolfgang Denk
Signature · 4 lines
Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de An optimist believes we live in the best world possible; a pessimist fears this is true.