Jerry Merrill wrote:
>
> Roman:
>
> I fought something like this once.  The problem ended up being related to
> R-M-W on the port pins.  Each time I toggled the CLOCK pin, it would latch
> the CURRENT state of the DATA pin (which of course can change when the
> slave ACKs.  The solution was to restore the DATA pin after each CLOCK
> change.  I suppose using shadow registers might of done it as well.
>
> My (CVASM) source for talking to a 24C00 type device is at:
>
> http://www.tech-tools.com
>
> Click on "search" and search for "i2c"


Thanks Jerry, this got me thinking. A quick check of my
code shows that it might be possible to get a RMW error,
and if this happens my PIC will be actively driving the
SDA line high so I may have damaged the eeprom.
I will re-code it tonight to remove any chances of
getting RMW problems. :o)

Thanks to everyone who offered help!! Many good suggestions
there. Thanks Olin for the 1k resistor tip, I always assume
a digital pin will pull 5mA low but the datasheet is very
sketchy with current data. It does mention 3mA, so I will
follow your advice and chnage the resistor to 2k2.

Thanks again everyone! :o)
-Roman

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