> The advantages of SPI are: higher bit rate (Megabits/s possible on some
> devices), more simple and robust protocol (i.e. no start or stop
> conditions).  It is also more simple to bit bash SPI in software than I2C.

I agree with faster and simpler, but not with more robust.  Properly
implemented, both SPI and IIC should get the bits there all the time.  IIC
has some flow control and ACK/NACK built into the protocol, which could add
robustness depending on how you look at it.  I certainly disagree that
having start and stop conditions somehow makes IIC less robust.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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