Re: programming atmega48/168's

The difficulty was caused by the at48's load buffer size differing
from that of the at168, of which the programming software wasn't aware. Once
fixed, all worked well.
Thanks for the various suggestions.

Hul

dbr@xxxxxxxx wrote:
John - the differences in fuses shouldn't (...) make a difference. Only
the lo fuse is set and the others are left as they are.

But, the failure is apparent when trying to verify data written
to the flash and that might be indicative of serial programming not
being enabled, ie the hi fuse.

Anyone know what unenabled serial programming looks like?

Hul

John B <spamj_baraclough@xxxxxxxxxxxxxxxxxxx> wrote:
On 09/11/2007 Hul Tytus wrote:

comp.arch.embedded
programming atmega48/168's

I have been programming an atmega168 for the the last few weeks with
no trouble. Today an atmega48 was put in the 168's place, and the
programming failed. From a quick look, there appeared to be a timeout
when polling the flash af0ter a buffer had been written. That was a
quick look at the end of the day, though.
Has anyone here found differences in the programing of the two
versions that might explain this error?

Hul

Apart from the obvious differences of Flash and RAM size, what are your
fuse settings? The fuses in the mega48 behave differently from those in
the 88/168.

--
John B
.

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