Kevin wrote:
>When you TRIS a pin as input, then read it, does that not put a logic 1 in
>the PORT register if the pin is pulled up? If so, when the pin is TRIS'd to
>output again, it will be outputting logic 1.??
>
>Therefore, care should be taken when doing I2C in this method to make sure
>that the pin is set to output 0 whenever you tris back to an output.

As an aside, when doing open-collector code I clear the port pin just before
I change it to output. Just to sure that the pin will be low when I need it
to be!
Helps to avoid having a nasty level collision on a OR'd bus line.
Regards...

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David Duffy        Audio Visual Devices P/L
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Ph: +61 7 38210362   Fax: +61 7 38210281
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New email: avd@audiovisualdevices.com.au
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