Matt, David and Joshua. There is *nothing* in the header that defines
     the port direction to allow using them as outputs. Since all ports
     start up as inputs, writing values to them will have no effect. The
     #include statement only defines *where* the ports are, not how they
     are set up.

     I don't know the variety of C that David is using, but look for a
     function with "tris" somewhere in the name, since this is the
     instruction used on the 12bit PIC's to set the I/O characteristics of
     a port. Alternately, if your flavour of C allows #ASM statements, set
     the port up directly with PIC assembler.


     CIAO - Martin.

     P.S. - the #use pragma in the header *should* correctly set up the
     timer.


______________________________ Reply Separator _________________________________
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     <PICLIST@MITVMA.MIT.EDU> Poster:       Matt Bonner <mbonner@SUNADA.COM>
Organization: Sunada Technology Corp.
Subject:      Re: Newbie Question
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David VanHorn wrote:
>
> I don't do C, but shouldn't you have some sort of chip setup code that
> defines those pins as outputs, and maybe sets up a timer or something??
>
> The frequency of the crystal also enters into it, else how to know when N
> seconds have passed? All the chip knows is xtal clocks, which don't have a
> finite relationship to realtime.

David,
The 2 issues you raise are likely being handled by the following lines
in Joshua's code:
  #include <16c715.h>
  #use delay(clock=20000000)

Joshua,
I don't know the PCM compiler, but your code looks OK (if my comments
above to David are correct).  Can you describe your hardware?

--Matt