[PD-dev] Keyspan serial control

[B. Bogart]

What PD are you using? can you create a [comport] object?

Try right clicking to get the help for [comport] to set the parity, flow
control etc, and also the devicename.

the message pp2500 would then be created with a stream of decimal bytes
like:

112, 112, 50, 53, 48, 48

"112" is the byte that incodes "p" in ascii

you may need a "return" at the end:

112, 112, 50, 53, 48, 48, 10

if you put the above in a message box and send it to the unit through
the comport object you should be in business.

I don't have any ASCII encoding table here, so I used the pd "key"
object, which I'm not sure is correct...

b.

Jasper van den Brink wrote:
> Hi b,
> Thanks for the reply.
> Its not a camera that i use, its a pan tilt unit FOR a camera.
> The ptu is made by dperception.com and it has a rs232 controller.
> It listens to commands like pp2500 (pan position 2500) and tp600 (tilt
> position 600).
> I am an new to this kind of programming. Sorry i dont understand really what
> you mean. I hope somebody can make a Pd patch for me that i can try and see
> if it works. I am not good in this. My excuses.
>
> Cheers jasper
>
>
> On 8/31/05 2:35 PM, "B. Bogart" <ben at ekran.org> wrote:
>
>
>>Hi Jasper,
>>
>>What camera did you get?
>>
>>I'm been using Canon and Elmo serial control cameras in PD the last
>>couple months.
>>
>>For canon and elmo the protocol documentation states the raw bytes one
>>needs to send to the camera. I thought this was the norm so I'm suprised
>>your getting anything out of a terminal program, since I've been no
>>other cameras that consider the ascii meaning of each byte as significant.
>>
>>Anyhow thats beside the point.
>>
>>When using the comport object in PD you have to send each byte as a
>>decimal integer. So you only send it messages from 0-255. It is a very
>>low level interface as things like "\n" are just anyther number from
>>0-255. Marc Lavallee has written a package called ascii that takes 0-255
>>and makes symbols and lists out of it, it also takes symbols and lists
>>and turns it back into dec bytes.
>>
>>My pan/tilt command looks like this:
>>
>>129, 1, 6, 2, 18, 18, 4, 4, 1, 0, 1, 11, 0, 0, 255
>>
>>where each "," sends a different message one after the other.
>>
>>I have used the keyspan on OSX using comport and it works fine. I used
>>the version in the CVS in the iem folder, but It does not have a darwin
>>makefile, but copying the makefile directly from the PD externals
>>documentation worked fine. Also since your keyspan is not a ttyS* you'll
>>need to set the comport device name manually. Check out the help patch
>>on how to do this.
>>
>>I was thinking of releasing an interface abstraction for this elmo
>>camera...
>>
>>Good luck.
>>
>>b/.
>>
>>Jasper van den Brink wrote:
>>
>>>Hello all,
>>>I am new to pd and dont have any experience with pd to, i am learning.
>>>What i am trying to make is a controller for a rs-232 pan/tilt unit.
>>>I managed to give commands with zterm and it works fine. Command like pp2500
>>>will set the pan movement to step 2500 for example.
>>>First thing i want to try is to give commands like that with Pd.
>>>
>>>The settings for the pan/tilt unit are:
>>>The host terminal or computer should be set to 9600 baud, 1 start bit, 8
>>>data bits, 1 stop bit, and no parity. Hardware handshaking and XON/XOFF are
>>>not used.
>>>
>>>Using OSX 10.3.9
>>>
>>>The keyspan serial adaptor is: USA19QW181P1.]
>>>
>>>I have been looking everywhere to see if i could find an example howto just
>>>give simple commands to the pan/tilt unit but i cant find it anywhere.
>>>
>>>Would somebody be able to send me a Pd patch for it?
>>>
>>>Thanks a lot, cheers
>>>
>>>jasper
>>>
>>>
>>>
>>>_______________________________________________
>>>PD-dev mailing list
>>>PD-dev at iem.at
>>>http://lists.puredata.info/listinfo/pd-dev
>>>
>
>
>
>
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