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On 12/11/10 19:59, Razvan-Ionut Stoian wrote:
> I have implemented lots of 3 wire ADC designes using bitbanging. I know
> that whenever CS goes low, one can clock slave's output out to the SBC's
> GPIOs. It seems that using four wire interfaces to get data out of 3 wire
> devices is not a trivial task, after all.
>
> It's a bit frustrating, since the SPI interface on my ATmel board is
> extremely fast (133MHz/[1-255]) and doesn't work the CPU as much as the
> GPIOs. So the advantage of using this over bitbanging is obvious.
I'm somewhat suprised, most Atmel AVR uC's have the ability to run a
3-wire SPI... I would have thought that their larger 32bit stuff would
do the same.
- --
Jason Stahls
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