The problem isn't really solved at all.

The USB soundcard doesn't seem to completely prevent [comport] to detect my uno board (I've been playing with both plugged in for the past 2 hours). But [comport] seems to be a little temperamental. I have to open and close Pd several times, and change the USB port i'm using, for it to detect the arduino board (though changing the port may not have any impact). Opening and closing the port i'm using in [comport] doesn't seem to have any effect either.

The thing is, as i said in a previous post, that there's something weird about my serial ports on my ubuntu machine. The Arduino IDE detects my boards about every other time, or just looses it for no apparent reason. So maybe it's a problem with Ubuntu? [comport] seems to have a much more predictable behaviour in windows (which i can't use because i need low latency).

Any Gandalf out there to help me out?

pierre


2011/7/9 Martin Peach <martin.peach@sympatico.ca>
On 2011-07-09 08:48, Pierre Massat wrote:
UPDATE : comport is now working as expected, and my arduino uno board is
now friends with my USB soundcard.


So what was the problem?



I guess it's high time i started reading the first volume of Harry Potter.


Maybe read some Crowley about banishing daemons before plugging in...

Martin


Pierre

2011/7/9 Ingo <ingo@miamiwave.com <mailto:ingo@miamiwave.com>>


   Similar problem here. I had an Arduino (USB) and a LCD display (RS232)
   working together very well with two [comport] objects on my old
   mainboard.
   With the new board either one by themselves is working fine but both
   of them
   connected bidirectional doesn't work. As soon as I connect the serial in
   from the display (which is supposed to get the keypad of the serial
   display)
   I get a lots of crazy data coming in. After a while either [comport]
   or Pd
   altogether crashes.

   The LCD [comport] should only receive digital buttons on/off. While the
   arduino sends buttons plus four analogue INs from a joystick and two
   foot
   pedals.
   All cables are very short, so the problematic behaviour can't be
   caused by
   the cable length. Without connecting the serial out of the display
   to the
   serial in of the computer everything works fine.

   I was also suspecting an error in comport where the data of two
   instances of
   two [comport] objects get mixed up. It looks like the analogue data
   from the
   arduino board gets forwarded to the second RS232 [comport] of the LCD.

   Ingo


   ________________________________________
   Von: pd-list-bounces@iem.at <mailto:pd-list-bounces@iem.at>
   [mailto:pd-list-bounces@iem.at <mailto:pd-list-bounces@iem.at>] Im

   Auftrag von
   Pierre Massat
   Gesendet: Samstag, 9. Juli 2011 13:38
   An: pd-list
   Betreff: [PD] Comport can't read serial devices when soundcard is
   plugged in

   Hi all!

   After having had to deal with a "bug" in pduino (see Arduin is drivin me
   mad), i wrote a small sketch for the board and a patch using
   comport. It was
   working fine until i decided to actually try it with my audio patch.
   It turns out that my external USB soundcard prevents comport from
   working
   properly. It can't open the arduino board, and can't event detect serial
   devices ("devices" yields an empty message in the console). As soon as i
   unplug the soundcard, everything works fine again.

   I think i'm beginning to realize that a lot of things have to be
   taken care
   off, and i know that my patch and sketch are way to simple to take
   this kind
   of issue into account (i wish i could switch back to Pduino and
   firmata).

   So my question is : is this behaviour normal, or is it bug in comport?

   Thanks!

   Pierre




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