From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matwey V. Kornilov <matwey.kornilov@gmail.com>
Date: Sat, 17 Oct 2020 14:14:07 +0300
Subject: am335x uart boot
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To: u-boot@lists.denx.de

12.10.2020 11:39, Matwey V. Kornilov ?????:
> Hello,
> 
> I am trying to provide u-boot via uart to am335x bootrom (I use
> BeagleBone Black board). Has anyone succeeded on it?
> 
> The CPU technical reference says that I have to use X-Modem 1K to load
> the firmware. I am trying to reach this with screen and sx command.
> 
> In the serial console I see transmission invitation from the hardware
> side: 'C'.
> When I use sx --1k -X to transmit the binary there are no data accepted.
> When I use sx -X (with 128 byte frame) the transmission is running until
> hardware sends "Cancel" command in the middle.
> 
> I've also tried minicom terminal. It behaves like X-Modem 128 byte
> transmission with no success.
> 
> 

Now I believe this was due to transmission errors. I've taken another
RS232 converter and now everything boots both with sx -X and sx --1k -X