Cochran DCs

Dirk Hohndel dirk at
Mon Oct 6 19:57:53 PDT 2014

On Mon, Oct 06, 2014 at 09:29:17PM -0400, John Van Ostrand wrote:
> I have the Cochran data stream well decoded, both dive log information and
> sample data. If someone is interested in moving the cochran file import
> code forward I'd be glad to collaborate.

We're certainly interested. Linus started this a while ago but didn't get
to the point where he could make sense of the data... so there are some
old files but nothing that works.

We might even be able to get access to a Cochran dive computer to test
this :-)

> Additionally,  I have the Cochran DC import working in subsurface and could
> use some help. I'm in a little over my head hunting down a seg fault in
> Subsurface when I use the log file option when importing.

More than happy to help with that... where exactly does it happen? Can you
reliably reproduce it? Do you have a stack trace?

> I could also use some dive logs that have more interesting dives than I've
> done. Ones with more than two gasses, helium, more dives than the DC can
> hold and a wider range of events. I'm also trying to tease out the model
> features and I need a wide selection of data from the same models which
> have different memory or feature configurations.

A good friend of mine who is a Trimix instructor has a Cochran. I'm sure I
could get access to that in order to test - it's a bit of driving to get
there, so I'd love to make sure we have pretty solid code before I do that
- ideally the ability to do a full dump (assuming that's supported by
their protocol)

> If you have a Cochran DC and would like to help, I have a download program
> to import the memory from the DC into raw data files. Alternatively, you
> can import to Subsurface one my code is in the tree and help me identify
> new events and find problems.

I'd be interested in either. I'm traveling the next two weeks so it will
be a little while before I can get access to a Cochran, but in the
meantime we can track down your crash and address any other questions you
might have.


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