Re: [avrdude-dev] How to add I2C device disable preamble?

[Bob Paddock]

> Something like:
>
> preinit = "reset low; mosi high; sck high; wait 200;\
>            sck low; wait 100; mosi low; wait 10; mosi high; \
>           ...";

I'll have to look to see what the exact I2C sequence
would have to be.  Also it changes between manufactures
of the Accelerometers.

> One issue with that is that it would only be applicable to bit-bang
> programmers, where avrdude handles the entire communication by itself.

I use a PonyProg clone, so bit-banging
is not a problem.  40 cents to replaces the chip,
verses $30 to replace a AVRISP, which seemed
to last about six months before they fail.
Maybe they are better now, have not used
them regularly for a few years.

> For a completely different route, couldn't you build one of those ISP
> programmers that implement STK500 protocol but use their own micro to
> run the bit-banging?

I had not thought of that, but that would mean more hardware
to maintain.