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need help with crystal Fuses setting for 18f26k22

 
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zeeshan ahmed



Joined: 02 Dec 2010
Posts: 22

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need help with crystal Fuses setting for 18f26k22
PostPosted: Thu Feb 16, 2012 1:27 am     Reply with quote
Hi all,
I am stuck in a problem, I think problem arised due to wrong fuse setting or wrong crystal oscillator. I want to use 20Mhz or 25 Mhz crystal oscillator. When i compiled the program, and tested it, I found controller is not running at correct frequency.

Compiler version = 4.124

below is the code i used to test it.
Code:

#include <18F26k22.h>
#device adc=10
#FUSES NOWDT,HSH,PUT,NOLVP
#use delay(clock=20M)         
#use rs232(baud=38400,xmit=PIN_C6, rcv=PIN_C7)

void main(void)
{
     while(true)
     {
          output_toggle(pin_c0);
          delay_ms(100);
     }
}



so, what I found is the delay time between toggles is 25ms, instead of 100ms. Confused

Can any one tell me whats is going wrong.
Thank you & Best regards.
zeeshan ahmed



Joined: 02 Dec 2010
Posts: 22

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Problem Solved
PostPosted: Thu Feb 16, 2012 2:08 am     Reply with quote
I use the fuse NOPLLEN ... And the problem solved. Very Happy
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