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Old 04-07-2012, 09:00 PM   #1
zuzoa
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Registered: Nov 2008
Location: USA
Distribution: Arch 64-bit
Posts: 159

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Processing will not communicate with Arduino


I have an Arduino Uno that is recognized by lsusb and is given the device name /dev/ttyACM0, as recognized by the Arduino IDE. I am added to the uucp group. Despite this, Processing will not show any available serial ports, nor will it communicate with the arduino if I tell it to use /dev/ttyACM0.

I have the ambient light code/setup detailed here working perfectly in Windows, and the same code will not run under Arch linux. I have installed the packages libxtst 1.2.1-1, lib32-libxtst 1.2.1-1, and the AUR versions of (Oracle) jre 7u3-1, jdk 7u3-1, arduino 1.0, and processing 1.5.1.

Code:
[susie@luka ~]$ groups susie
uucp video audio users
Code:
[susie@luka ~]$ sudo lsusb -s 005:002 -v

Bus 005 Device 002: ID 2341:0001  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x2341 
  idProduct          0x0001 
  bcdDevice            0.01
  iManufacturer           1 Arduino (www.arduino.cc)
  iProduct                2 Arduino Uno
  iSerial               220 64934333235351218242
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           62
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      2 Abstract (modem)
      bInterfaceProtocol      1 AT-commands (v.25ter)
      iInterface              0 
      CDC Header:
        bcdCDC               10.01
      CDC ACM:
        bmCapabilities       0x06
          sends break
          line coding and serial state
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval             255
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
Device Status:     0x0000
  (Bus Powered)
Code:
[susie@luka ~]$ stat /dev/ttyACM0
  File: /dev/ttyACM0
  Size: 0         	Blocks: 0          IO Block: 4096   character special file
Device: 5h/5d	Inode: 5627        Links: 1     Device type: a6,0
Access: (0660/crw-rw----)  Uid: (    0/    root)   Gid: (   14/    uucp)
Access: 2012-04-07 20:58:52.497971334 -0400
Modify: 2012-04-07 21:11:51.354636461 -0400
Change: 2012-04-07 21:34:05.677967159 -0400
 Birth: -
Processing code:
Code:
import processing.serial.*;

// The serial port
Serial myPort;      

// List all the available serial ports
println("Available serial ports:");
println(Serial.list());
Processing output:
Code:
[susie@luka ~]$ 
Available serial ports:
WARNING:  RXTX Version mismatch
	Jar version = RXTX-2.2pre1
	native lib Version = RXTX-2.2pre2
Any insight or suggestions are appreciated.
 
Old 04-11-2012, 10:38 AM   #2
zuzoa
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Registered: Nov 2008
Location: USA
Distribution: Arch 64-bit
Posts: 159

Original Poster
Rep: Reputation: 35
Also, running a command like `$echo "test">/dev/ttyACM0` causes the RX led on the arduino to blink, which leads me to believe it may be a software issue with Proccesing.org.

Still haven't figured this out, suggestions are welcome!
 
  


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