Hey guys this is my first time programing a PIC18 and a have a few questions. I am doing it in assembly language. My first goal is to turn an LED on but i cant quite seem to do that yet. Heres my program:

#include <p18F2431.inc>
CONFIG = _CONFIG1H, 0x06
CONFIG = _CONFIG2L, 0x0E
CONFIG = _CONFIG2H, 0x1E
CONFIG = _CONFIG3L, 0x3C
CONFIG = _CONFIG3H, 0x9D

org 0000

BANKSEL TRISA
CLRF TRISA
BANKSEL PORTA
BSF PORTA,0

end

Im not sure how to configure it. Every time i try to build it, i get this error message:
Missing argument(s) (configuration byte setting is missing)

What do I do? Thanks!!!

 

Your syntax for setting the configuration bits is wrong.

You can set individual function using the CONFIG command, eg

  CONFIG OSC = HSPLL
  CONFIG WDTEN = ON
;and so on.

Take a look at the P18F2431.INC file to see all the options.

The other way to set the configuration bits is to write a hex value to the appropriate configuration register, as you are trying to do.
The syntax to do it this way is

  __CONFIG _CONFIG2H,0x0E ;Note the double underline before the CONFIG!

Once you settle on one method of setting the configuration bits you must stick with it all the way through. You can't mix them and set some bits with the CONFIG command and others with the __CONFIG command.

 

Ok I did that, now i have a new prob. Here is my program now:

#include <p18F2431.inc>
CONFIG OSC = HS
CONFIG FCMEN = OFF
CONFIG IESO = OFF
CONFIG PWRTEN = ON
CONFIG BOREN = ON
CONFIG BORV = 20
CONFIG WDTEN = OFF
CONFIG HPOL = LOW
CONFIG LPOL = LOW
CONFIG LVP = ON
org 0000

BANKSEL TRISA
CLRF TRISA
BANKSEL PORTA
BSF PORTA,1

end

I can build it now, but RA1 is not turning on. Any thoughts?

 

You don't use the bankswitch with the 18F and try LATB instead of PORTB

 

Tried all of that, still doesn't work.

 

Run it through the simulator. Also try using the internal osc for testing.

 

PortA can be configured as either an analog port or a digital port. It defaults to analog so to use it as a digital port you have to set appropriate register (clear ansel0 I think should do it).