gnupic: Here's a simple working GPAL example
Subject:
Here's a simple working GPAL example
From:
David McNab ####@####.####
Date:
24 Oct 2004 15:08:02 +0100
Message-Id: <417BB73A.4000303@rebirthing.co.nz>
David McNab wrote:
> Hi,
>
> How do I import another module into a GPAL module?
<snip>
After a bit more playing around, I realised that:
1) the .pub files for whatever modules are being imported have to be
listed on the gpal command line
2) the 'with "modulename" has to appear in the importing module.
So my first successful 'hello, world' GPAL prog (for the benefit of others):
1. The code - helloleds.pal
module helloleds is
with p16f873a;
pragma processor = "16f873a";
pragma udata_section = "BANK0";
procedure main is
begin
p16f873a.TRISB = 0x00;
p16f873a.PORTB = 0xa5;
asm
sleep
end asm;
end procedure;
end module;
2. Compiling the module:
$ gpal -c helloleds.pal p16f873a.pub
3. Linking the module:
$ gplink -s default.lkr -a inhx8m -c -o helloleds.hex helloleds.o
(For the 'default.lkr' link script, I'm using the standard 16f873a.lkr
gputils link script, with the extra line:
SECTION NAME=BANK0 RAM=gpr0
4. Download the program, and it works
(phew!)
--
Cheers
David
