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Old 09-29-2021, 08:29 AM   #33
DoomsdayDog
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DoomsdayDog began at the beginning.
 
Posts: 26
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Join Date: Jul 2018
Device: PocketBook Basic 2
Quote:
Originally Posted by kib View Post
Also, there are no signals on the UART port.
From https://linux-sunxi.org/FEL#Serial_output:
Quote:
While there are a few different ways to trigger FEL mode, they are not always equal. Some do low-level initialization (load Boot0 and Boot1), and some don't.

If you are going to use FEL mode to retrieve device information, you need a to pick a method of entering FEL mode that initializes Boot1.
Boot1 allows you to use UART, otherwise there is no response from the board I believe. It might be worth trying the button combination for entering boot1:

Quote:
By holding a standard button

This is usually one of the standard tablet buttons, like the VOL+ key or something.

The following seems to work:

Press and hold the suspected or reported FEL key.
Press and hold the power key for about 2 seconds.
Release the power key, and press it at least 3 times immediately.

Boot1 is initialized using this method.
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