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problem with pic18f2550 code ... might be my configuration

 
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NickLatech
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problem with pic18f2550 code ... might be my configuration
PostPosted: Sun Apr 23, 2006 9:20 pm     Reply with quote
I'm having problems with my pic18f2550 code or configuration.

I have a test board setup that I know works for a pic16f876a (I set it up for the pic18f2550 but tried a pic16f876a after found out that they have a similary pin-out). So i'm pretty sure that the board is not the problem. So next i tried making the simplest code possible to blink an led.. I dont get anything. I donno what the problem is

The board has a 20mhz CR, the problem could be in the configuration. I read the oscillator configuration from the datasheet and it seems that the below fuses should work fine.

If anyone sees a problem please let me know because i'm stumped

Thanks
Nick



Code:
//test pic18f2550
#include <18F2550.h>

#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN

#use delay(clock=48000000)


void main()
{
output_high(pin_b7);
output_high(pin_a1);
delay_ms(1000);
output_low(pin_b7);
output_low(pin_a1);
delay_ms(1000);
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Apr 24, 2006 11:47 am     Reply with quote
Try a more simple program. This program assumes you have a
20 MHz crystal. If not, change the clock value to the appropriate
frequency. If your crystal is 4 MHz or below, change the HS fuse to XT.

Code:
#include <18F2550.h>
#fuses HS, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP, NOPBADEN
#use delay(clock=20000000)

void main()
{

while(1)             
  {
   delay_ms(500);
   output_high(PIN_A1);
   delay_ms(500);
   output_low(PIN_A1);
  }

}
NickLatech
Guest
PostPosted: Mon Apr 24, 2006 4:27 pm     Reply with quote
looking at your code I found out what my problem was.. i forgot the infinite loop. working at night sometimes is just a waste of time..

thanks a million for the help!

Nick
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