[PD] Comport can't read serial devices when soundcard is plugged in

[Martin Peach]

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 at miamiwave.com <mailto:ingo at 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 at iem.at <mailto:pd-list-bounces at iem.at>
>     [mailto:pd-list-bounces at iem.at <mailto:pd-list-bounces at 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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