[En-Nut-Discussion] web tiger serial config
Don Thompson
dthompson at dcu.org
Tue Apr 15 18:55:43 CEST 2008
Hi Harald,
One obvious thing I overlooked. I have a new install on my laptop. The version is: avr-gcc (GCC) 4.1.0.
I still have the old laptop where this worked so must try that to confirm.
I have avoided using lower baudrates since I thought more error was introduced. I have only tried 9600, 38400 and 115200. None of these work, but the output varies. I believe at 9600 it only
displays a few characters. I never looked at the high byte of UBRR since I just figured it was zero. The low byte is correct as I dump it to the leds to confirm. What about any other usart related
registers?
thanks,
Don
Harald Kipp wrote:
> Hi Don,
>
> Don Thompson wrote:
> > When I went back to the tiger ethernut1 project, I find the serial
> port produces garbage
> > characters.
>
>
> A similar problem had been recently reported by Richard Karolyi. He
> found out, that UBRR0H hadn't been set correctly when used with
> baudrates below 4800.
>
> He was using Ethernut 1.3 (similar to Webtiger) and Nut/OS 4.2.1.
>
> In a first look I wasn't able to locate the problem, but something seems
> to be broken. Can you please check the GCC version?
>
> avr-gcc.exe --version
>
> Harald
>
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