On Sat, 17 Oct 2020 12:05:29 -0700 (PDT), in
gmane.comp.hardware.beagleboard.user Szabó Benedek Ákos
<szabobenedekakos-re5jqeeqqe8avxtiumw...@public.gmane.org> wrote:
>Btw, Im using a Pocketbeagle, I flashed during it was connected to an USB
>HUB with external power supply. Is it ok or not?
Depends on the hub. USB 2 specs are for a maximum of 0.5A (500mA) at 5V
-- giving 2.5W. But if any other devices are attached to that hub, they too
are drawing power, and the hub may only be able to provide around 0.1A per
port.
A 3W charge-only USB power supply might be safer.
Unlike the BBB, the PB only has USB for power input. The BBB has a 5V
barrel connector for power-only supplies, and it is strongly recommended
that such be used for flashing on the BBB.
You never did answer the question of what the LEDs were doing on those
failed boot attempts. So far as I can tell from images, the PB has the same
four status LEDs as the BBB, just located differently. From
https://groups.google.com/forum/#!topic/beagleboard/LHAxeSki-eU
[] [] [] [] - off
[x] [] [] [] - on, starting mmc scan...
[x] [x] [] [] - scanning mmc...
[x] [x] [x] [] - processed boot script...
[x] [x] [x] [x] - jumping into boot...
(After that, if a flasher image is found, the LEDs run a Larson scanner
pattern until flashing is done, and then the board is shutdown; otherwise
they show system activity: heartbeat, eMMC, CPU, SD card.)
Unfortunately, the show-pins PERL script is only BBB aware, not PB.
--
Dennis L Bieber
--
For more options, visit http://beagleboard.org/discuss
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