>Yes, you can completely reset the IIC hardware from software.

Great!  Thanks, Olin.

Is that best done by clearing SSPEN, then setting it again, or is there
another approach?

I dug out the reference which suggested that the I2C interface couldn't
be reset properly from software - it's at:

        http://www.howell1964.freeserve.co.uk/MyPICPage.htm

The source appears to be none other than Microchip!  Quoting from the
fourth paragraph on the above page:

> The PIC's I2C slave interface is very unfriendly. If you don't use it
> just right, it can lock up in a fault state. It sets a bit to flag the
> error condition, but I couldn't see anyway of clearing the condition.
> I talked to Microchip USA again and they confirmed that this amazingly
> stupid behaviour is indeed the case!

Perhaps this refers to a problem which was fixed in a later revision of
silicon and/or more recent devices.
--
Ian Chapman
Chapmip Technology, UK

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