[PD-dev] Requesting SVN commit access

Dennis Engdahl engdahl at snowcrest.net
Wed Feb 26 03:02:44 CET 2014


I hope you received my previous e-mail with the attachment.  If not, 
please let me know.

The X32 responds to commands by sending the response to the IP and port 
from which it received the command.  These are the problems with the 
present approach which my routine solves:

1.  The "from" port used while sending a command is assigned by the 
system, and is not reported to the user.  Therefore, the user has no way 
to set up a listener on that port to receive the X32's response.

2.  Even if we modify the existing routines to allow the user to specify 
the "from" port, after doing so, the same port cannot be used again to set 
up udpreceive.  The system returns an "in use" error when trying to do so. 
In Winsock, the "from IP", "from port", "to IP", and "to port" must be 
unique for a connection to be set up.  Since the user is specifying the 
"from port", "to IP", and "to port", and since the "from IP" is static, 
only one connection can be set up at a time.  Both udpsend and udpreceive 
try to set up a connection.  If the "from port" is static, the second 
connection fails.

My routine allows the setting of the "from port".  Then, my routine only 
sets up one connection, and sends and receives on that one connection. 
Since the user is specifying the "from port", more than one connection can 
be established (by more than one patch) by specifying different (known) 
ports (see the help page for my routine.)

Thank you for your response, Martin.  I am more than willing for you to 
take over the routine if you wish, or to solve this another way if you 
wish.  I just wish to communicate with the X32.


Dennis Engdahl
engdahl at snowcrest.net
(530) 926-2996

On Tue, 25 Feb 2014, Martin Peach wrote:

> Date: Tue, 25 Feb 2014 12:58:57 -0500
> From: Martin Peach <martin.peach at sympatico.ca>
> To: Jonathan Wilkes <jancsika at yahoo.com>,
>     Dennis Engdahl <engdahl at snowcrest.net>, "pd-dev at iem.at" <pd-dev at iem.at>
> Subject: Re: [PD-dev] Requesting SVN commit access
> Yes I'd be happy to include anything that works better in mrpeach/net.
> I'm curious as to what is special about the Behringer X32 that makes it hard 
> to communicate with the existing externals.
> Martin
> On 2014-02-25 12:53, Jonathan Wilkes wrote:
>> Hi Dennis,
>>       I'm not sure who has the "keys to the kingdom" here.  But at far
>> as the update for Martin's library you can just contact him directly
>> (along with any documentation that explains your changes).  Then he can
>> push the updates himself.  Generally that's the process for updates to
>> preexisting libraries.
>> Of course you can also get svn access to add your own library for other
>> things.
>> Best,
>> Jonathan
>> On Tuesday, February 25, 2014 10:29 AM, Dennis Engdahl
>> <engdahl at snowcrest.net> wrote:
>> To the list members:
>> My name is Dennis Engdahl.  I have been developing computer programs since
>> the days of the keypunch (and paper tape), and have taught computer
>> science at the college level for 20 years.  I am now retired, and have
>> started an internet providing company which my sons now run.
>> I am an expert at communications software (TCP/IP, etc.), and am
>> interested in pd to communicate with my church's new Behringer X32.  Since
>> the UDP routines Martin Peach wrote are not able to receive data
>> successfully from the X32, I researched the problem and created a new
>> routine which will communicate.  If you're interested in the details, you
>> can either look at my source, or pm me.
>> At this time, I would like to commit this routine (udpsndrcv.c) and its
>> help file to Martin's area, to allow others to communicate with hardware
>> with the same requirements as the X32.
>> I am interested also in the audio aspects of pd, and may be developing
>> other routines to help out in the future.
>> Please allow me SVN commit access to be able to accomplish this.
>> Thank you,
>> Dennis Engdahl
>> engdahl at snowcrest.net <mailto:engdahl at snowcrest.net>
>> (530) 926-2996
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