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PIC18F46K22 issues?

 
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thefloyd



Joined: 02 Sep 2009
Posts: 46

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PIC18F46K22 issues?
PostPosted: Wed Sep 12, 2012 6:26 pm     Reply with quote

For the life of me I can't seem to get my PIC18F46K22s to work. I've tried a couple.

simple example:

#include <18f46k22test.h>


void main()
{
setup_oscillator(OSC_4MHZ|OSC_INTRC);

//Example blinking LED program
while(true)
{
output_low(LED);
delay_ms(DELAY);
output_high(LED);
delay_ms(DELAY);
}

}

.h file:
#include <18F46K22.h>
#device adc=10

#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
#FUSES INTRC //Internal RC Osc
#FUSES NOIESO //Internal External Switch Over mode disabled
#FUSES NOBROWNOUT //No brownout reset
#FUSES WDT_NOSLEEP //Watch Dog Timer, disabled during SLEEP
#FUSES NOPBADEN //PORTB pins are configured as digital I/O on RESET
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOXINST //Extended set extension and Indexed Addressing mode disabled (Legacy mode)

#use delay(int=4000000)

#define LED PIN_A0
#define DELAY 1000


I've fiddled with everything from 64mhz down to 4mhz, changing the setup_oscillator() and #use delay lines as appropriate. Something is clearly happening, because I get as far as executing output_low (if I swap the order and set output_high first I get that far as well). As soon as I hit the delay, it's off to la-la land. I'm guessing the pic is oscillating at something like 32khz or something like that, whereas the delays are all timed for Xmhz.

why? Am I insane?
asmboy



Joined: 20 Nov 2007
Posts: 2128
Location: albany ny

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PostPosted: Wed Sep 12, 2012 6:47 pm     Reply with quote

1- learn to use the 'code' icon

2- here is a devel/ test setup that works for me
Code:

#include <18f46k22.h>
#Fuses INTRC_IO,NOPLLEN,PRIMARY_ON,NOFCMEN,NOIESO,PUT, 
#Fuses  BROWNOUT,BORV29,NOWDT,                                                             
#Fuses CCP2C1,NOPBADEN,CCP3B5,                       
#Fuses NOHFOFST,TIMER3B5,NOMCLR,               
#Fuses NOSTVREN,NOLVP,NOXINST,NODEBUG                     
#Fuses NOPROTECT,NOCPB,NOCPD,NOWRT,NOWRTC
#Fuses NOWRTB,NOWRTD,NOEBTR,NOEBTRB                             


#use delay( clock=8000000,INTERNAL ) // clock changed to 80000
#use rs232(baud=57600, xmit=PIN_C6, rcv=PIN_C7, ERRORS )
thefloyd



Joined: 02 Sep 2009
Posts: 46

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PostPosted: Wed Sep 12, 2012 7:05 pm     Reply with quote

Thanks, that definitely works. I'm able to blink an LED at 8mhz using that setup.

I'll fiddle with the fuses and delay to see if I can get the PLL working and the higher clock speeds.
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