[PATCH] Poseidon MK6 import

Robert Helling helling at atdotde.de
Mon Oct 27 00:42:12 PDT 2014

On 27.10.2014, at 04:27, Dirk Hohndel <dirk at hohndel.org> wrote:

Good morning,

> Robert appears to have stepped up to help our Willem to get this right,
> but the more people work on this and help figure out what's the right way
> to do things, the better.

indeed, more people needed here. I cannot say I have any sort of overview about the recently added CCR functionality. I have only only spent some time on debugging to make sure features that worked before got unbroken again. And of course, I don’t dive rebreathers myself (currently I am not diving anything unfortunately, stupid flu!) so all my knowledge is from hearsay anyway.

Re the compression thing: I agree it should not be in memory, only when saving files. And then repeated values should be omitted rather than set to zero as zero has a special meaning: Zero set point indicates that we are on OC and shortcuts all CCR calculations.

BTW, another thing that need some looking after (for which I did not have time, yet) is when we calculate SAC rates: For the PSCR code, that I submitted on Friday, the steady state value of pO2 depends (amongst other things) on the current SAC. But often enough (at least when I was testing) it had not yet been calculated so the pO2 calculation has to resort to the default value (see the first if() in the code). My impression is that in many cases, there should be enough data to have a SAC but we only calculate it later in the code path. This is particularly bad, since we have two different default values for SAC, one for bottom time and one for deco, except that for real dives (those downloaded from dive computers) this distinction does not make sense.


Robert C. Helling     Elite Master Course Theoretical and Mathematical Physics
                      Scientific Coordinator
                      Ludwig Maximilians Universitaet Muenchen, Dept. Physik
                      Phone: +49 89 2180-4523  Theresienstr. 39, rm. B339

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