USB device node

moistTowelette · 08-10-2007, 05:42 AM

I have a supermicro server on which I am trying to run the LCD using lcdproc. In the LCDd.conf file, I must specify the device node however I can't seem to find one that relates to the LCD. When I run 'lsusb -v', I get:

Code:

Bus 002 Device 003: ID 15d9:1133  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        32
  idVendor           0x15d9 
  idProduct          0x1133 
  bcdDevice            1.00
  iManufacturer           1 SMC  
  iProduct                2 SuperMicro LCD Display   
  iSerial                 3 1.0.0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           41
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      42
         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     0x0010  1x 16 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               1
Device Status:     0x0001
  Self Powered

However using 'lsusb -D /dev/XXX', I cannot find a node in /dev that relates to this (I keep getting the message 'Cannot open /dev/XXX'). I have tried every node in /dev, and have tried './MAKEDEV lcd' as well.

How do I create a device node that I can use with my LCD/lcdproc?

reddazz · 08-11-2007, 02:17 PM

When you plugin the device and run dmesg, you should see the device node listed.

moistTowelette · 08-12-2007, 05:30 AM

The LCD is permanently connected, and runs under an HID layer. There is a message in the output of 'dmesg' relating to the device, however it says nothing about a device node.

I have sequentially run 'lsusb -D' on every node in /dev, all of them return "Could not open device."... what I need to know is how to create it.

Anyone?

moistTowelette · 08-13-2007, 11:44 AM

Anyone...? I have Googled my arse off over this...