serial port weird chars ...

Antony Pavlov antonynpavlov at
Fri Aug 7 09:41:04 PDT 2015

On Fri, 07 Aug 2015 10:41:12 -0400
Roberto Alejandro Espi Munoz <raespi at> wrote:

> Hi ... I'm currently having some trouble with displaying characters 
> correctly in my terminal.  I'm using a board equivalent to the 
> mini2440.  This one has a NOR and a NAND.  I connect to it over a serial 
> port interface.  When I boot up the board in debug mode I'm able to see 
> clearly the messages displayed by the S3C2440A USB Downloader which is 
> copied in the NOR interface, I then download my barebox binary over the 
> USB interface and when it boots I get a lot of weird characters on 
> screen.  The console seems to respond correctly, I issue for example the 
> "reset" command and it resets but I can't make out what is displayed.   
> I was guessing at first a serial port configuration problem on my 
> operating system (I use Linux), tried it over on Windows and same 
> effect, the first bootloader works great and barebox when starting just 
> mangles the characters.
> The other weird problem is than when I use a USB-Serial converter to 
> connect to the board's serial port everything works !
> I'm currently using barebox 2012.09 and OpenSuse Linux 13.2
> Any ideas ? thanks

You have the problem if you use your host computer motherboard serial port (no matter, Linux or Windows),
isn't it?
And no problem if you use USB-Serial dongle. So it looks like host serial port problem.

Could you try to connect the board to another host computer?

Best regards,
  Antony Pavlov

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