MPLAB Macro how to tell if parameter is a literal ?

B

bean

New Member

• Feb 7, 2012

• #1

I want to make a macro and in part of it I need to the parameter into W.
If the parameter is a literal I need to do "MOVLW param1", but if it is a register I need to do "MOVF param1,W".
How can I determine what was passed ?

Thanks, Bean

 

L

Lourens

Member

• Feb 7, 2012

• #2

Bean
One way is to add another parameter to your macro which is then the 'switch' to select either the MOVLW or the MOVF instruction. This works for me because i know
at the time i insert the macro in the code what is required.

 

B

bean

New Member

• Feb 7, 2012

• #3

Lourens,
Thanks.
Another question. In my macro I have

Code:

  if source <> "W"
    movf source,w
  endif

But I keep getting a "missing argument(s)" error on the "if" line.

Bean

 

L

Lourens

Member

• Feb 7, 2012

• #4

Bean
<> is not a valid arithmetic operator in mpasm, you must use != This info i got from an old MPASM USERS GUIDE DS33014G page 179.