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thefloyd
Joined: 02 Sep 2009 Posts: 46
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PIC18F46K22 issues? |
Posted: Wed Sep 12, 2012 6:26 pm |
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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? |
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asmboy
Joined: 20 Nov 2007 Posts: 2128 Location: albany ny
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Posted: Wed Sep 12, 2012 6:47 pm |
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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 )
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thefloyd
Joined: 02 Sep 2009 Posts: 46
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Posted: Wed Sep 12, 2012 7:05 pm |
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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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