Re: [avrdude-dev] Re: program error?

[E. Weddington]

On 1 Apr 2003 at 17:06, E. Weddington wrote:

> On 1 Apr 2003 at 18:50, Brian Dean wrote:
> 
> > On Wed, Apr 02, 2003 at 11:27:58AM +1200, Alex Shepherd wrote:
> > 
> > Could be.  What part in specific are you trying to program, Alex?
> > Just for sanity's sake, lets first lets double check the various
> > time related parameters associated with the part (chip_erase_delay
> > and min/max_write_delay for the flash memory).
> 
> > If those match the data sheet, one thing to try is to double the
> > existing values for that part and see if it makes a difference.  It
> > shouldn't, but its easy to try and if it makes a difference, then we
> > learn something.
> 
> Reasonable idea.
> 
> > > So far I have found the instructions in the docs that say how to
> > > rebuild with Cygwin. Is this all I need or is there more to it
> > > than that?
> 
> > I can't really speak to this - Eric's our Windows guys, all I'm able
> > to test with right now is FreeBSD.
> 
> Yes, the latest cygwin should be fine. My cygwin version is at the
> most a couple of months old. When downloading cygwin you will need, of
> cource, the whole Development tree and be sure to get the readline and
> ncurses libs.

Also, it looks like the termcap lib is needed as well.

 
> > Eric mentioned the timing differences between using ioctl() on Unix
> > vs in/out instructions on Windows.  The in/out instructions are
> > undoubtedly faster.  It may be possible that these signals are
> > changing slightly too fast - not sure about that.  Eric - just
> > wondering if you might consider placing a short sleep or something
> > within a few of the parallel port manipulation functions for the
> > Windows port to slow them down a little at the right places, maybe
> > make this enabled with a #define so that they can be easily compiled
> > out?
> 
> Yes, I had considered doing that before. We had previously talked
> about this on the list. IIRC, Joerg didn't encounter any immediate
> problems when he did his testing on Windows, so we left it out.
> 
> I'll see what I can do.
> 

Ok, I can build the latest from CVS so I'll make the changes tomorrow 
and I can send you a new avrdude.exe.

Let me know how your testing goes with modified timing parameters.

Eric