> -----Original Message-----
> From: Drew Vassallo [SMTP:snurple@HOTMAIL.COM]
> Sent: Wednesday, February 21, 2001 6:27 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: IIC Routines - giving, not needing
>
> > > The routines use consecutive bsf/bcf operations on a port throughout
> >the
> > > code.  Although it might be bulletproof under the condtions you
>
> >Note that bsf/bcf operations are performed to the tris (data direction)
> >registers, not to the port.
>
> Very true.  I believe the problems encountered with consecutive PORT bit
> operations are not applicable to TRIS registers.  But otherwise, you'd be
> right.
>
Heh, guess I should have looked a little closer before shooting that email
off!  I only mentioned it, because I had so much grief on the first ever PIC
project I worked on (a PID TEC controller...talk about jumping in at the
deep end!).  The PIC was running at 4MHz and I was driving a MOSFET bridge
to control current direction through the PIC.  Couldn't understand why some
bits weren't getting set :o)  I suspect the MOSFET's had enough gate
capacitance to upset things.

Mike

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