Re: [Amforth-devel] avrdude error downloading image

[Bernard M. <bme...@gm...>]

Thanks Mathias,

I have a 16mhz crystal connected to an external oscillator which feeds the
chip via XTAL1. Using the link you mentioned I get LFUSE = 0xC0 HFUSE= 0xD9
nad EFUSE= 0xff, is this correct?

I then added these values to the sample makefile and did a "make write-fuse"
and then reset the device. I also have frequency=16000000 in the bf.asm
file.

I still have no activity out the serial port. I am using miniterm and a
loopback on the cable works fine at 9600 baud (what I have in bf.asm).

Not sure what to debug next.

Thanks again,
Bernard

On Tue, Apr 29, 2008 at 8:06 PM, Matthias Trute <mt...@we...> wrote:

>
> > 1. the line ".equ cpu_frequency = 8000000" in the bf.asm file, is that
> the
> > crystal frequency of the crystal frequency devided by two?
>
> That is the frequency, the controller runs with in Hz. which
> clock source is used and the possible clock modification depend
> on the fuse settings. http://palmavr.sf.net/cgi-bin/fc.cgi
> may be useful here.
>
> Keep in mind, that the usart interface has a 2x setting that doubles
> the baudrate, but this is unused in the default sources.
>
> btw: The template directory is a much better starting point since the
> relevant files are better documented.
>
> > 2. Which serial port of the mega128 device will I expect the forth to
> use?
>
> If you use the default sources, connect with usart0.
>
> Bye
> Matthias
>
>
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