[PSUBS-MAILIST] DSV Aquatic update

Thu May 24 20:19:39 EDT 2018

Hi Ian,
Mining bitcoin...too funny!  Yeah, I suppose why waste cpu cycles.  :)
I pretty much settled on RPI because they have a nifty 7 inch capacitive touchscreen nicely engineered to fit in a tiny footprint, cheap, which exactly fits what I was looking for.  I don't think realtime is necessary for my needs but I wouldn't object to it either if I could get the same type of graphics and display.  I am getting past the i/o pin limitation on RPI by using multiplexers to sequence through the sensors.  At this point I think I'll stick with RPI and let you develop on the Beaglebone, although your piqued my interest now and will probably take a look at it.
Jon 

      From: irox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>; Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, May 24, 2018 12:33 PM
 Subject: Re: [PSUBS-MAILIST] DSV Aquatic update

Hi Jon,
the UI looks awesome.  I've been consider Beaglebone boards as RPI alternatives, since they have better embedded/realtime programming support (essentially a second microcontroller on the board to handle realtime control, without Linux interfering/interrupting) .  But if it's just the "head" for your system you might not have any critical/realtime interaction code on the RPI.
Also, while your sub is charging you can have it mining Bitcoins. :)
Cheers!  Ian.

-----Original Message-----
From: Jon Wallace via Personal_Submersibles 
Sent: May 24, 2018 6:45 AM
To: Personal Submersibles General Discussion 
Subject: Re: [PSUBS-MAILIST] DSV Aquatic update

 96Hi Alan,
I did not model after anything specific although graphically it does try to replicate military aircraft displays.  Due to limited screen "real estate" it was important to layer information based upon importance.  Those things that I consider essential information appears on the initial display...depth, duration, heading, warnings, and access to engines.  You'll note that depth, duration, and warnings are always displayed regardless of what other information is being displayed.  Graphics is a matter of personal preference.  I do like Cliff's display as well.
What I really like about the Raspberry PI is that you have a full Linux OS at your disposal so logging data is easy and accessing the OS via ftp, vnc, or wifi with the latest versions, is all possible.  The wifi capability with VNC means I can even access and control the display with my phone.  On the surface at least, a support team could use their own phones to log into the SCM and monitor my submarine systems.  Just a lot of neat stuff that can be done.

      From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, May 24, 2018 1:06 AM
 Subject: Re: [PSUBS-MAILIST] DSV Aquatic update

Great work Jon, must have taken quite a bit of time.I don't think you have too many sensor inputs; I worked out that I needed 60+ to be  in line with GL requirements.I looked at the display video & it was quite easy to follow.Did you model that on an existing submarine display?Alan

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