[Cialug] ROS (Robot Operating System)

[Todd Pierce]

Dan,

Congratulations on getting your partition to recognize the full 8 gig!

Not only that, you got the ftpd to compile.  Sorry about minicom not
compiling.  Hell, I'm surprised they made a gcc port small enough yet it
compiles stuff at all.
Ah... and you have to rebuild everything all over again on the Chumby.
Well, at least you have practice now.  You're going to be the local expert
on that device pretty soon.  Take notes for us if you can  :)

I still think it's a bit adventurous to be considering using WiFi for the
communications between the Chumby and the S2, if that's what you're doing.
Serial is so... ancient... and simple.. and all you need is a little cable
between them.  Of course, I have no experience with the Propeller, so
everything sounds easy to me if I'm clueless about it.

Remember, if you go WiFi, you're going to need not just the hardware on the
S2, but also the TCP/IP software stack, and some WiFi implementation
(firmware?) not to mention know how to write programs that pass information
over sockets.

Ah, I didn't see that BST toolset.  Why do you need the source?
-Todd

On Tue, Apr 26, 2011 at 9:59 AM, Dan Hockey <icepuck3k at yahoo.com> wrote:

>
> Parallax is working on a wireless module that will allow serial data
> transfer and remote programing for stamps and anything base on the prop
> chip.
> I think they said it was using an avr chip. They should at least used the
> prop or the freescale IMX233 the Chumby uses
> http://forums.parallax.com/showthread.php?128414-Parallax-WiFi-Module
>
> Some one did a wireless using xbees with the S2 but he didn't give any
> details on how when I asked about it.
> http://forums.parallax.com/blog.php?46831-W9GFO/page2
>
> ATM the only non-windows software I know of is brads spin tool for linux
> and mac os.
> The only problem with that is Brad hasn't release the source code for
> BST,only binaries
> http://www.fnarfbargle.com/bst.html
>
> And parallax hasn't released any of their code either, something to do with
> them still using Delphi.
>
>
> --- On *Tue, 4/26/11, Todd Pierce <toddcpierce at gmail.com>* wrote:
>
>
> From: Todd Pierce <toddcpierce at gmail.com>
> Subject: Re: [Cialug] ROS (Robot Operating System)
> To: "Central Iowa Linux Users Group" <cialug at cialug.org>
> Date: Tuesday, April 26, 2011, 9:08 AM
>
>  Dan,
>
> As far as controlling the S2 with the Chumby goes, I already mentioned that
> I'd be tempted to just use serial port communications.
>
> They do have code available for this purpose:
>
> Simple serial:
> http://obex.parallax.com/objects/183/
>
> and Full Duplex Serial:
> http://obex.parallax.com/objects/54/
>
> It would then be a matter of using one of those libraries to make a (rather
> short) program to handshake between the two devices.
>
> Does your S2 really have WiFi?  If it does, well, it's a tough call whether
> or not WiFi is the way to go.  I'm just throwing out options.
>
> However you do it, I'd probably keep things simple by having the Chumby
> accept a huge 'status word' which describes everything going on with all of
> the S2 devices at any time, and then a 'command word' which the Chumby could
> yell at the S2 which would tell it what to do with any of its devices at any
> time.  That's just a personal preference on how I'd design it.
>
>  I guess that GUI tool for installing the code on the propeller only works
> on Windows, but someone (as usual) is developing an IDE for Linux:
>  http://propeller.wikispaces.com/Linux+Development
>
> I didn't know about that one, I'll have a closer look at it.
>
> Getting serial communications to function on the Chumby will probably be
> less involved; it actually is a real computer with an OS.
>
> Also, you mentioned that you installed gcc on the Chumby.  Did you test it
> by trying to compile anything yet?
>
> I used the latest source code release of pure-ftpd, it compiled just like
> on any regular linux box. It was cool to have an ftp server running right on
> the chumby.
> I tried to compile minicom but gcc complained about a mess of errors and
> quite.
>
> But now I need to reinstall everything again after fixing a weird
> partitioning problem caused by how chumby does things. Now I can use all of
> the 8gb card I'm now using
>
> -dan
>
>
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