Quote:
Originally Posted by Merlin09
ok, it seems I mixed up terminology.
I can get to the uboot prompt, but not launch bist to have fastboot.
In fact, it seems only the serial connection is working... basically, I understand what to do... but don't know how to do it.
sorry about the mix-up, I'm still struggling to place everything in order in my mind
so now, I guess what I should ask is... how can I restore bist and everything else, starting with only the serial connection?
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That is correct, u-boot only enables the serial port.
The same serial port that the SoC's internal code had been using prior to loading u-boot.
Also the same serial port that the kernel will use once it is loaded and executed.
That is three programs that pass off control of the serial port, one after the other as each larger application loads and runs.
(These are all basic things that a person who is messing around with the embedded firmware is expected to know. A Kindle is not the vehicle for first timer's learning. Instead, get a commercial "evaluation" board intended for self-taught instruction - they are much more forgiving of screw-ups.)
bist == Built In Self Test :: a (nearly) "full featured" build of u-boot.
The version of u-boot that first runs (and presents the prompt you reported) is a 'few featured' build of u-boot.
They are both contained in the same binary. If you have one, you have both.
Enter:
?
for a command list
Then enter:
bist
to switch to the full build
Then enter:
?
for the more complete command list.
If your device does not behave as above, then cut&paste the actual commands entered and outputs between 'code' '/code' tags of your next post.
Enable the capture feature (the logging feature) of your terminal emulator that you are using to make it easier to cut from that capture log and paste into the post here.
Also, use the 'advanced editor' here if you are not already using it.