[PD] Pduino and arudino mini pro/raspi debian- Pduino or Comport?

Tue Sep 22 04:47:38 CEST 2015

I could not get the arduino pro mini to work with just comport no matter how i tried, so i installed "Pduino" and after installing

pd-mapping, pd-pure, pd-moocow [pdstring] i got it to work

Patrick Pagano B.S, M.F.A
Audio and Projection Design Faculty
Digital Worlds Institute
University of Florida, USA
(352)294-2020
________________________________
From: Pd-list <pd-list-bounces at mail.iem.at> on behalf of Richie Cyngler <glitchpop at gmail.com>
Sent: Monday, September 21, 2015 10:35 PM
To: Martin Peach
Cc: pd-list at mail.iem.at; IOhannes m zmölnig
Subject: Re: [PD] Pduino and arudino mini pro/raspi debian- Pduino or Comport?

Funny I was just working on this this morning looking for a simple solution for my students.

I found this http://colinzyskowski.com/?page_id=503 to access analogRead.

It kind of works. The third pot interferes with the other two and when I modified to code to add a fourth it interfers or doesn't work at all. Seems to be something to do with the map function Arduino code not workign correctly because when I poll [comport] with [print] each analogRead seems to be on it's own "channel". I can't figure out how to separate them any better than using [split] with there mapped values (not great). I tried [unpack] and [route] but neither of these separate the data streams.

On the hardware side I just have each 10k pot wiper connected it's own analog pin on the Uno and each pot is powered and grounded from the Uno via the rails on my breadboard. I'm guessing but adding in some resistors might stabilise the circuit a bit, I don't know if this would help with the interference or not.

As mentioned above I also had to add a dialout to access the serial port as outlined by Rinzwind here http://askubuntu.com/questions/58119/changing-permissions-on-serial-port

On Tue, Sep 22, 2015 at 8:45 AM, Martin Peach <chakekatzil at gmail.com<mailto:chakekatzil at gmail.com>> wrote:
...and connect Tx to Rx and Rx to Tx and don't forget to connect the grounds together.

Martin

On Mon, Sep 21, 2015 at 6:16 PM, Ivica Ico Bukvic <ico at vt.edu<mailto:ico at vt.edu>> wrote:
Two more considerations: making sure you have the right firmware on the Arduino (sometimes it gets corrupt for seemingly no apparent reason and you need to reupload it), and finally making sure that it's getting enough power through RPi's USB port to provide stable operation.

On 9/21/2015 6:15 PM, Ivica Ico Bukvic wrote:
If connecting to serial port works when you run pd with sudo privileges, you will need to add your user is to the dialout group. See http://unix.stackexchange.com/questions/14354/read-write-to-a-serial-port-without-root for more info. HTH

On 9/21/2015 1:56 PM, Pagano, Patrick wrote:
I have done all of that for use with the ardunio uno, it's when the raspi2 is directly connected to the serial pins that it does not connect.
I tested the device on mac and used the ALLINPUTS firmata and it works with a virtual serial created by FTDI
just can't seem to talk to it with Linux debian running vanilla

comport works fine with the UNO

Patrick Pagano B.S, M.F.A
Audio and Projection Design Faculty
Digital Worlds Institute
University of Florida, USA
(352)294-2020<tel:%28352%29294-2020>

________________________________________
From: Pd-list <pd-list-bounces at mail.iem.at<mailto:pd-list-bounces at mail.iem.at>> on behalf of IOhannes m zmölnig <zmoelnig at iem.at<mailto:zmoelnig at iem.at>>
Sent: Monday, September 21, 2015 1:47 PM
To: pd-list at mail.iem.at<mailto:pd-list at mail.iem.at>
Subject: Re: [PD] Pduino and arudino mini pro/raspi debian- Pduino or   Comport?

On 09/21/2015 05:17 PM, Pagano, Patrick wrote:
?i sent that message to it ]devicename /dev/ttyS1/S0 and it does not exist so i tried to create it with mknod and it created the names in /dev but they are not accessible.
mknod? this sounds like you are following advice from the 1990s.
these days mknod is hardly ever needed: instead any devicefiles will be
created on the fly by the resp. drivers.

selecting device in the toggles in the pduino stuff only finds device 0

I am wondering if it's a linux issue because the only serial port at all is

serial 0 /dev/ttyAMA0

a little bit of googling hints that /dev/ttyAMA0 is indeed the name for
the serial interface on the GPIO ports - which afaiu is what you want.

so you just use that device.

then you need to get the permissions correct.
check whether the device is already setup to allow group-members to
write to it, and which group that is:
$ ls -l /dev/ttyAMA0
crw-rw---- 1 root dialout 4, 67 Sep  3 16:12 /dev/ttyAMA0

and eventually add the user running Pd to that group:
pd at raspbian $ sudo bash
root at raspbian # adduser pd dialout

after that you only need to re-login as that user to let the new group
membership have any effect.

gadsr
IOhannes

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Ivica Ico Bukvic, D.M.A.
Associate Professor
Computer Music
ICAT Senior Fellow
Director -- DISIS, L2Ork
Virginia Tech
School of Performing Arts - 0141
Blacksburg, VA 24061
(540) 231-6139<tel:%28540%29%20231-6139>
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