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Re: [avrdude-dev] alf programmer -- inverted outputs
From: |
Jan-Hinnerk Reichert |
Subject: |
Re: [avrdude-dev] alf programmer -- inverted outputs |
Date: |
Thu, 26 Aug 2004 12:14:14 +0200 |
User-agent: |
KMail/1.5.4 |
On Monday 23 August 2004 17:23, Roeland Moors wrote:
> I made a programmer like the schematic included in the source.
> But instead of using the 74367 I used the 74368. This means that
> the ouputs are inverted. Is it possible to define this in
> avrdude.conf?
> If not, would this be hard to program?
Hi Roeland,
right now it is not possible to define it in the config.
It should not be too hard to implement, but there are a few pitfalls
when it comes to negated OE-lines or even VCC-lines. IMHO, it would
be best to cleanup the related code before doing any changes. I will
take a closer look at the problem this weekend.
QUICK FIX: If you can compile the sources, you can alter the struct
"pins[]" in "par.c"; the last number in each line tells if a pin is
negated. Naturally, this patched versions won't work with normal
programmers. Additionally, you might need to specify "-E reset", if
your reset signal becomes inverted.
Cheers
Jan-Hinnerk