[ECOS] redboot with console baudrate 115200

Andrew Lunn andrew@lunn.ch
Wed Jun 7 09:00:00 GMT 2006


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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