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PIC 18f2331 PCPWM

 
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sfraser



Joined: 25 Jan 2015
Posts: 1

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PIC 18f2331 PCPWM
PostPosted: Sun Jan 25, 2015 2:34 pm     Reply with quote
Hi,

I've been struggling with this for a while now. As far as I can tell I have everything set up correctly (registers etc.) But for some reason it still isn't working and I'm just wondering if I've missed something.

When I run the code in a simulator all the registers I configure are set up correctly but the PTMR register just stays at 0. I thought this was supposed to increment from the internal clock (PTMR clock?)?

Do I need to use an external oscillator or configure a specific timer, or have I just missed something in my code (apologies for the lack of comments)?


Code:

#include <stdio.h>
#include <stdlib.h>
#include <htc.h>
#include <delays.h>

void init();

void init()
{
   //PORT Initialization
   TRISB = 0x00;

   //PWM Module Initialization

   PTCON0 = 0x00;
   PTCON1bits.PTEN = 1;
   PTCON1bits.PTDIR = 0;

   PWMCON0 = 0x57;
   PWMCON1 = 0x01;

   PTPERL = 0x05;
   PTPERH = 0x00;

   DTCON = 0x00;
   
   OVDCOND = 0x2A;
   OVDCONS = 0x00;
   FLTCONFIG = 0xB3;

   SEVTCMPL = 0x00;
   SEVTCMPH = 0x00;

   PDC0L = 0x00;
   PDC0H = 0x00;
}

void main()
{
   init();
   int x;

   while(1)
   {
      //infinate loop

      for(x=0; x<20; x++)
      {
         PDC0L = x;
         PDC0H = 0x00;
         
         Delay100TCYx(5);
      }
   }
}


Thank you for any help you can give me
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Jan 25, 2015 2:44 pm     Reply with quote
This is Hi-tech code but you're on the CCS forum.
CCS had functions to do this. Example:
http://www.ccsinfo.com/forum/viewtopic.php?t=37206&start=2
But in Hi-tech you have do it with registers (or write your own functions).
If you want to stay with Hi-tech, they have a forum (use google to find it).
Also Microchip has a Hi-tech forum.
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