gnupic: Re: Global symbols in macros don't work in gpasm?
Subject:
[PIC]: Global symbols in macros don't work in gpasm?
From:
Wojtek Zabolotny ####@####.####
Date:
10 Sep 2000 09:48:27 -0000
Message-Id: <20000910114017.A1460@wzab.nasz.dom>
Hi All,
I have a problem with setting of global symbols in macros in gpasm.
Let's consider the following source:
=> test.asm <=
list p=16f877
counter macro
x_cnt set x_cnt + 1
movlw x_cnt
endm
org 0
x_cnt set 0
counter
counter
counter
end
=> end of test.asm <=
Well it has no sense, but clearly demonstrates the problem. I'd expect
to get the following instructions assembled:
movlw 1
movlw 2
movlw 3
But in fact I get the
movlw 2
movlw 4
movlw 6
It seems that each macro is evaluted TWICE =:-( ?!
The problem first appeared, when I tried to implement my macros supporting
the bank switching (see my post sent a few days ago "Macros for automatic
banks management - problems with gpasm").
[Now I've stated that the origin of that problem can be the same - repeated
evaluation of the macro. First pass modifies the xb_cur, and the second pass
generates the incorrect code]
Where is the problem with gpasm's macros implementation and how to
fix/workaround it?
--
TIA & Greetings
Wojciech Zabolotny
http://www.ise.pw.edu.pl/~wzab
Build your free Data Acquisition System:
http://www.ise.pw.edu.pl/~wzab/picadc/picadc.html
