View source for GPIB-USB 82357B clone/Info

== lsusb ==

Note that endpoint 2 IN has a max packet size of '''511''', which is not entirely compliant with the USB standard. When enumerating, the Linux kernel warns about this:

<small>
 config 1 interface 0 altsetting 0 bulk endpoint 0x82 has invalid maxpacket 511
</small>

This is the full lsusb output on a Linux system:

<small>
 $ '''lsusb -v -d 0957:0718'''
 Bus 001 Device 019: ID 0957:0718 '''Agilent Technologies, Inc.'''
 Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0957 '''Agilent Technologies, Inc.'''
  idProduct          0x0718 
  bcdDevice            0.00
  iManufacturer           1 '''AGILENT Technologies, Inc.'''
  iProduct                2 '''H82357 ()'''
  iSerial                 5 '''8235720155'''
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           39
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          3 HIGHSPEED
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass         0 (Defined at Interface level)
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x01ff  1x 511 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x06  EP 6 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval               1
 
 Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
 Device Status:     0x0002
  (Bus Powered)
  Remote Wakeup Enabled
</small>