Re: [avr-chat] avrdude fails to write

[Joerg Wunsch]

Pedro Vaz Teixeira <address@hidden> wrote:

> avrdude -p 1200 -c dapa -E reset -U flash:w:avrisp.hex:i

Well, the AT90S1200 is really a problem child... it requires a
different startup procedure than all later AVRs.  Anyway, avrdude is
supposed to handle it, and I've successfully programmed them in the
past.

My first guess is that your programmer/computer is too fast to work
reliably with the target controller.  Try reducing the ISP clock by
inserting delays, e. g. adding -i10 on the command-line.

> I've also tried to read both the fuse bits and the lock bits, but it
> returns the following in both cases:

>      read operation not supported for memory "lock" (fuse)

....which is simply due to the AT90S1200 not supporting these in ISP
mode -- see the datasheet.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)