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Re: redboot with console baudrate 115200
- From: Andrew Lunn <andrew at lunn dot ch>
- To: J?rgen Lambrecht <Jurgen dot Lambrecht at tiscali dot be>
- Cc: ecos-discuss at ecos dot sourceware dot org
- Date: Wed, 7 Jun 2006 10:59:52 +0200
- Subject: Re: [ECOS] redboot with console baudrate 115200
- References: <445B3D16.1010001@gdsys.de> <20060505122459.GA27092@lunn.ch> <4486946D.4070706@tiscali.be>
On Wed, Jun 07, 2006 at 10:55:09AM +0200, J?rgen Lambrecht wrote:
> Hello,
>
> on my custom board based on eb55 (also AT91M55800), I have the same
> problem: Redboot works fine with all baudrates, but ymodem or xmodem not.
> The highest speed I can use is 19200 baud.
> Also Vince Z. has the same problem. Like him, I now also use TFTP instead.
>
> The strange thing is that on the eb55 demoboard, 38400 downloads are no
> problem.
How accurate is your boad rate generator? I think the older AT91 cores
had a limited baud rate generator which could not always generate the
exact baud rate needed. It could be the error is too big for higher
boad rates.
Andrew
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