Re: [avrdude-dev] AVR-DUDE parallel port options not working

[Dennis Clark]

Alex Shepherd wrote:
> > Alex,
> >
> >   How would I know if the port address was standard or not?  
> > If not, how can I tell AVR-DUDE what it really is?  I do know 
> > (from other parallel port programmers) that my LPT1 port is 
> > 0x3BC.
>
>
> That sounds like a standard port address.
>
> I just had a look in the AVRDude user manual PDF that is in the WinAVR doc
> directory and the problem you may have is that you may need to specify the
> parallel port to by LPT3. Here is the segment from the manual found in:
>
> C:\WinAVR\doc\avrdude-4.4.0\avrdude.pdf
>
> ----------------------
> A.2.3.2 Parallel Ports
> AVRDUDE will only accept 3 Windows parallel port names: lpt1, lpt2, or lpt3.
> Each of
> these names corresponds to a fixed parallel port base address:
> lpt1 0x378
> lpt2 0x278
> lpt3 0x3BC
> On your desktop PC, lpt1 will be the most common choice. If you are using a
> laptop,
> you might have to use lpt3 instead of lpt1. Select the name of the port the
> corresponds to
> the base address of the parallel port that you want.
> ----------------------
>
> I just checked the source code and the LPT port addresses and names are hard
> coded. Hopefully specifying LPT3 will fix your problem. Note the you can
> also specify the port address in the avrdude.conf file that should be in the
> C:\WinAVR\bin directory.
>
>
> > Since this is a Thinkpad A20M, a laptop, perhaps it 
> > is a bit different from a desktop unit.  But I've found other 
> > parallel port programmers that were VERY picky work fine on it.
>
>
> Yeah, they used to be but an IBM should be pretty good.
>
> Try the different port using the "-P lpt3 option 

  Nice.  That sure does sound like the ticket - Sadly, that document
is conspicuously missing in my Winavr doc directory, or I wouldn't
have asked the question.

** a sort of related question **
  Is there a place to grab these documents?  My Winavr\doc directory
only has these:
avarice, avr-libc, simulavr-0.1.2.1, srecord, tkinfo, ussp-20050207 and
the GNU Manuals Online and WinAVR

Thanks for the help folks, I'll be testing this out tonight!

DLC
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Dennis Clark    TTT Enterprises
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