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PIC18F4550 internal clock

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biertafel

Joined: 28 Nov 2007
Posts: 2

PIC18F4550 internal clock

Posted: Wed Nov 28, 2007 9:37 am

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hello,

we want to program a PIC18F4550 and use the internal clock

We have found this code:

Code:

#include <p18f4550.h>
#include <delays.h>

#pragma config FOSC = HS
#pragma config PWRT = OFF
#pragma config BOR = OFF
#pragma config WDT = OFF
#pragma config CCP2MX = OFF
#pragma config LVP = OFF

void main(void)
{
TRISA=0x00;
ADCON1=0b00001111;
while(1)
{
   PORTAbits.RA0 = 1;
   Delay10KTCYx(200);
   PORTAbits.RA0 = 0;
   Delay10KTCYx(200);
}
}

We use MPLab v7.6 with MMC18 compiler (student version).
We use MPLab ICD 2 to load the program in the pic.

We connect a LED and a resistor at RA0 and it seems that nothing is happening.

We think that the choice for the clock is wrong
we found on other sites that

Code:

#pragma config FOSC = HS

has to be changed to

Code:

#pragma config FOSC = INTRC

but when building this we get an error

Quote:

Make: The target "C:\Documents and Settings\Matthijs te Lintelo\Bureaublad\Biertafel programmeren\programma's\07-11-24_1\07-11-24_1\blinkled.o" is out of date.
Executing: "C:\MCC18\bin\mcc18.exe" -p=18F4550 "blinkled.c" -fo="blinkled.o" -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa-
MPLAB C18 v3.14 (feature limited)
Copyright 1999-2005 Microchip Technology Inc.
This version of MPLAB C18 does not support the extended mode
and will not perform all optimizations. To purchase a full
copy of MPLAB C18, please contact your local distributor or
visit buy.microchip.com.

C:\Documents and Settings\Matthijs te Lintelo\Bureaublad\Biertafel programmeren\programma's\07-11-24_1\07-11-24_1\blinkled.c:5:Error [1225] configuration value 'INTRC' not recognized for configuration setting 'FOSC'
Halting build on first failure as requested.
BUILD FAILED: Wed Nov 28 16:20:06 2007

Here it looks like we have the wrong code or the compiler can't compile it (because of student version)

can anyone help us with this problem?

Matthijs & Wouter

amcfall

Joined: 20 Oct 2005
Posts: 44


Posted: Wed Nov 28, 2007 9:46 am

This forum is for the CCS compiler, not the Microchip C** series. Try the Microchip forums. The syntax is very different for pre processor directives. Avery

biertafel

Joined: 28 Nov 2007
Posts: 2


Posted: Wed Nov 28, 2007 9:49 am

ow sorry

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