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PIC24FJ64GA306 oscillator is not working correctly

 
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stoyanoff



Joined: 20 Jul 2011
Posts: 375

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PIC24FJ64GA306 oscillator is not working correctly
PostPosted: Thu May 30, 2013 6:52 am     Reply with quote
Hi, everyone! I have a problem with 1 PIC24FJ64GA306. I`m testing the controller with simple program:

Code:

#include <24FJ64GA306.h>
#FUSES HS,NOWDT
#use delay(clock=20M)

void main()
{
      while(1)
      {
             delay_ms(10000);
      }
}


So when I turn on my debugger (pic kit 3) and set a break point next to delay_ms() the expected delay is 10s but when I run the program the delay is atleast 4 times bigger. I exchange the quartz and it`s almost the same.
What am I doing wrong or where could be the error?
Thanks!
Ttelmah



Joined: 11 Mar 2010
Posts: 19504

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PostPosted: Thu May 30, 2013 7:53 am     Reply with quote
Almost certainly means your oscillator is not starting. You need to add 'PR' to your fuses to turn on the primary oscillator, or the chip will wake using the FRC oscillator, and you can then switch it later. The 'default' is for the primary to be off....

On these later chips several of the 'defaults', are perhaps not what you may expect.

Best Wishes
stoyanoff



Joined: 20 Jul 2011
Posts: 375

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PostPosted: Thu May 30, 2013 10:44 pm     Reply with quote
Thanks! I think now it`s OK!
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