Re: [avr-chat] Slow communication with ATTiny13

[Neil Davey]

Hi Robert,
Depending on what programmer you are using you can possible use the -B flag.
I use the ATTiny13 in a commercial project running on the 128kHz 
internal clock (which I've found in reality is more lower than this)
I had problems with programming speed till I re-organised what pins 
where connected where in the circuit..
I had a part of my circuit that was effectively applying a low pass 
filter to MISO or MOSI, I can't recall...

This may be part of your problem.. are you able to look at SCK, MOSI and 
MISO or a cro during programming?

Regards
Neil Davey

address@hidden wrote:
> Hello list,
> I am developing a project using an AT Tiny 13 in a fairly
> current-reduced application, which requires that I use the internal 128
> kHz clock.
> When programming (AVRDUDE + STK500 on OpenSUSE10.2), the write cycle is
> OK, but verify causes a "avrdude: stk500_2_ReceiveMessage(): timeout"
> error and after the code has eventually been read (takes some seconds) a
> "avrdude: verification error, first mismatch at byte 0x00ca         0x64
> != 0x3f" where the location and target hex are seemingly random.
> A manual inspection of the programmed code (AVRDUDE in terminal mode,
> read flash [which works without timing out]) shows that the chip was
> programmed correctly.
> This behaviour also occurs with AVRStudio4 but can be resolved by
> setting the fosc down to 1kHz. This does not work under AVRDUDE. Could
> anyone point me to the place in the source files where I might be able
> to tune the timeout??
>
> Many thanks,
>
> Robert von Knobloch
>
>
> _______________________________________________
> AVR-chat mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/avr-chat
>
>   


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Neil Davey
Griffith University

Centre for Wireless Monitoring and Applications
Griffith School of Engineering
Nathan Campus
Phone: 07-3735-7008
Fax: 07-3735-5112

School of Psychology - ACNRC
Mt Gravatt Campus
Phone: 07-3735-3395
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