> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Alan B. Pearce
> Sent: Thursday, August 09, 2001 12:27
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: Building a Servo
>
>
> >Based on this, I simply don't understand the F84 fixation.
>
> because from an earlier reply to one I suggested the 16F627/8 he
> already has
> a number of them.
>
> The way to do it without having the CCP is to use the INTR input to start
> the timer on the rising edge of the waveform, change the edge
> sensitivity to
> falling edge, on the next interrupt save the timer count and set the edge
> sensitivity back to rising edge. Initialise the timer ready to start
> counting again on the next interrupt. The value you have saved is
> the pulse
> width.

        This is quite a good idea, and is slightly different from the approach I
was planning to take (I was going to use the change on RB interrupt since I
wasn't aware you could change the edge sensitivity on the INT pin). Thanks,
TTYL

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