Re: [avrdude-dev] FTDI flashing stops at different positions

[Hannes Weisbach]

Am 17.07.2012 um 21:50 schrieb Daniel Schulz:

 Hi Hannes!
 
 Yes, your guess was right - linux. The version is the 5.11.1, compiled
 on Oct 18 2011 - I guess, it is the most current version.
 
 Hm, it is very difficult to describe. Sometimes it goes to 99% - but
 the read out was not 100% the same, a little bit is missing at the end
 and the whole file is much bigger then the source-hex file:
 source.hex: 8376byte
 readout.hex: 19204byte
I guess when you read the flash back, avrdude reads back all 8k, but your hex 
file does not contain 8k of code.
My second guess would be that the difference from 8k binary data in the flash 
to the file size of 19204 bytes is caused by the Intel hex file format.
Is the beginning of readout.hex identical to source.hex? Or the other way 
around: readout.hex should only contain 0xff after about 8376 bytes.
 
 The other time it works up to 87% and then the read out was around 4000byte.
 If I play with the timing (-b 100 or -b 200) it works up to
 99% or 87% but if I decrease the time it works to 11% or even 0%.
That is odd. Did you change the hex-file in between? If your problems are 
caused by the polling-problem it will always hang at the same point - 
regardless of the programming speed or other factors.
 But
 something is working after the output hangs, as I have monitored it
 with a oscilloscope. It seems to be loop.
Can you please run a programming with -v (5 times)? There will be a lot of 
output. You can redirect stderr and stdout to a file and send that file as 
attachment.
 So can you remember when you
 did your patch to the source?
I had a look and it seems the bug is still in the current SVN revision, so I 
did not submit the patch yet.
 But I'm not sure, if it is the software,
 because I flashed some atmegas in the near past.
 Maybe it is because of my whole setup? Have a look at on
 https://plus.google.com/u/0/photos/115078017107993743967/albums/5765804148693231409/5765804151018534226
Well, I would not use -b 100 on that setup. Maybe two zeros less. I can't 
see a short ground connection from your chip to your programmer.

-- 
Hannes
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Re: [avrdude-dev] FTDI flashing stops at different positions

[Hannes Weisbach]

Am 17.07.2012 um 18:30 schrieb Daniel Schulz:

 Hello Devs!
Hello Daniel,
 
 I've got another little problem and I cannot get any information about it.
 
Which OS are you running? I guess Linux?
 After that I have to hit Ctrl-C to get back to command line. But I
 dont get any other Information. It appeared from one day to another
 without any change on my setup. It simply stops the flashing process.
 What can I do??
You can try to remove the power from the FTDI. Sometimes the chip inexplicably 
hangs ... 
If you read the flash back (-U r:flash:out.hex:i), does the memory match the 
hex file you programmed or does that read hang too?
If I remember correctly, avrftdi had a faulty polling routine which could 
result in an infinite loop.
I do not remember, however, in which version I fixed that and if I even 
committed a patch - so try the SVN-version.

If the hang occurs on the last page, you don't have a problem, since the flash 
will be programmed correctly. However avrdude will not be able to verify the 
memory or terminate properly.

Hope this helps,
Hannes
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