Difference between revisions of "USB human interface devices with Linux"

From Organic Design wiki
m (See also)
(add lsusb output)
Line 16: Line 16:
 
  crw-rw---- 1 root root 180, 96 2008-12-04 21:53 /dev/usb/hiddev0
 
  crw-rw---- 1 root root 180, 96 2008-12-04 21:53 /dev/usb/hiddev0
  
 +
<pre>
 +
# lsusb
 +
Bus 001 Device 004: ID 1941:8021 
 +
Bus 001 Device 001: ID 0000:0000
 +
</pre>
 +
 +
<pre>
 +
# lsusb -D /proc/bus/usb/001/004
 +
Device: ID 1941:8021 
 +
Device Descriptor:
 +
  bLength                18
 +
  bDescriptorType        1
 +
  bcdUSB              1.10
 +
  bDeviceClass            0 (Defined at Interface level)
 +
  bDeviceSubClass        0
 +
  bDeviceProtocol        0
 +
  bMaxPacketSize0        8
 +
  idVendor          0x1941
 +
  idProduct          0x8021
 +
  bcdDevice            1.00
 +
  iManufacturer          0
 +
  iProduct                0
 +
  iSerial                0
 +
  bNumConfigurations      1
 +
  Configuration Descriptor:
 +
    bLength                9
 +
    bDescriptorType        2
 +
    wTotalLength          34
 +
    bNumInterfaces          1
 +
    bConfigurationValue    1
 +
    iConfiguration          0
 +
    bmAttributes        0xa0
 +
      (Bus Powered)
 +
      Remote Wakeup
 +
    MaxPower              100mA
 +
    Interface Descriptor:
 +
      bLength                9
 +
      bDescriptorType        4
 +
      bInterfaceNumber        0
 +
      bAlternateSetting      0
 +
      bNumEndpoints          1
 +
      bInterfaceClass        3 Human Interface Devices
 +
      bInterfaceSubClass      0 No Subclass
 +
      bInterfaceProtocol      0 None
 +
      iInterface              0
 +
        HID Device Descriptor:
 +
          bLength                9
 +
          bDescriptorType        33
 +
          bcdHID              1.00
 +
          bCountryCode            0 Not supported
 +
          bNumDescriptors        1
 +
          bDescriptorType        34 Report
 +
          wDescriptorLength      52
 +
        Report Descriptors:
 +
          ** UNAVAILABLE **
 +
      Endpoint Descriptor:
 +
        bLength                7
 +
        bDescriptorType        5
 +
        bEndpointAddress    0x81  EP 1 IN
 +
        bmAttributes            3
 +
          Transfer Type            Interrupt
 +
          Synch Type              None
 +
          Usage Type              Data
 +
        wMaxPacketSize    0x0008  1x 8 bytes
 +
        bInterval              10
 +
Device Status:    0x0000
 +
  (Bus Powered)
 +
</pre>
  
 
==See also==
 
==See also==

Revision as of 08:32, 5 December 2008

I want to use a plastic drum pad to trigger sounds on the computer. It is connected by USB. It is not supported by Mac OS X by default. It is not a MIDI device.

Device connection

The following appears in /var/log/messages

Dec  4 21:11:13 colourbox kernel: usb 1-2: new low speed USB device using uhci_hcd and address 3
Dec  4 21:11:13 colourbox kernel: usb 1-2: configuration #1 chosen from 1 choice
Dec  4 21:11:13 colourbox kernel: usbcore: registered new driver hiddev
Dec  4 21:11:13 colourbox kernel: hiddev96: USB HID v1.00 Device [HID 1941:8021] on usb-0000:00:14.2-2
Dec  4 21:11:13 colourbox kernel: usbcore: registered new driver usbhid
Dec  4 21:11:13 colourbox kernel: drivers/usb/input/hid-core.c: v2.6:USB HID core driver

The following device node appears

# ls -al /dev/usb/hiddev0 
crw-rw---- 1 root root 180, 96 2008-12-04 21:53 /dev/usb/hiddev0
# lsusb
Bus 001 Device 004: ID 1941:8021  
Bus 001 Device 001: ID 0000:0000 
# lsusb -D /proc/bus/usb/001/004 
Device: ID 1941:8021  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x1941 
  idProduct          0x8021 
  bcdDevice            1.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      52
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              10
Device Status:     0x0000
  (Bus Powered)

See also