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Re: [Discuss-gnuradio] Definition of USB Interfaces is different in Win


From: Ujala Qasim
Subject: Re: [Discuss-gnuradio] Definition of USB Interfaces is different in Windows
Date: Sat, 25 Apr 2009 01:23:40 +0600

Thanks for pointing out the problem. But doesn't the FX2 firmware download automatically? Isn't it a part of the USRP's boot sequence? How can I load the firmware then to get rid of this problem?

On Fri, Apr 24, 2009 at 11:27 PM, Eric Blossom <address@hidden> wrote:
On Fri, Apr 24, 2009 at 05:27:06PM +0600, Ujala Qasim wrote:
> I connected the USRP to the USB 2.0 port and obtained the information of the
> device using the lsusb -v command in Ubuntu. The output is attached below.
> Even in Ubuntu, the interfaces and endpoints come out to be different than
> those defined in usrp_interfaces.h. So what is going on here? Which are the
> actual interfaces and end points?
> Bus 005 Device 003: ID fffe:0002

As Philip pointed out, you haven't loaded the FX2 firmware yet.
You can tell this by looking at the bcdDevice field.  When it's got
the "real" firmware loaded, it has a non-zero value to the left of the
radix point.

Here's what it looks like after you load std.ihx:


Bus 001 Device 011: ID fffe:0002
Device Descriptor:
 bLength                18
 bDescriptorType         1
 bcdUSB               2.00
 bDeviceClass          255 Vendor Specific Class
 bDeviceSubClass       255 Vendor Specific Subclass
 bDeviceProtocol       255 Vendor Specific Protocol
 bMaxPacketSize0        64
 idVendor           0xfffe
 idProduct          0x0002
 bcdDevice            1.02
 iManufacturer           1 Free Software Folks
 iProduct                2 USRP Rev 2
 iSerial                 6 00000000
 bNumConfigurations      1
 Configuration Descriptor:
   bLength                 9
   bDescriptorType         2
   wTotalLength           50
   bNumInterfaces          3
   bConfigurationValue     1
   iConfiguration          0
   bmAttributes         0xc0
     Self Powered
   MaxPower                0mA
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        0
     bAlternateSetting       0
     bNumEndpoints           0
     bInterfaceClass       255 Vendor Specific Class
     bInterfaceSubClass    255 Vendor Specific Subclass
     bInterfaceProtocol    255 Vendor Specific Protocol
     iInterface              3 Command & Status
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       0
     bNumEndpoints           1
     bInterfaceClass       255 Vendor Specific Class
     bInterfaceSubClass    255 Vendor Specific Subclass
     bInterfaceProtocol    255 Vendor Specific Protocol
     iInterface              4 Transmit Path
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x02  EP 2 OUT
       bmAttributes            2
         Transfer Type            Bulk
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x0200  1x 512 bytes
       bInterval               0
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        2
     bAlternateSetting       0
     bNumEndpoints           1
     bInterfaceClass       255 Vendor Specific Class
     bInterfaceSubClass    255 Vendor Specific Subclass
     bInterfaceProtocol    255 Vendor Specific Protocol
     iInterface              5 Receive Path
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x86  EP 6 IN
       bmAttributes            2
         Transfer Type            Bulk
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x0200  1x 512 bytes
       bInterval               0
Device Qualifier (for other device speed):
 bLength                10
 bDescriptorType         6
 bcdUSB               2.00
 bDeviceClass          255 Vendor Specific Class
 bDeviceSubClass       255 Vendor Specific Subclass
 bDeviceProtocol       255 Vendor Specific Protocol
 bMaxPacketSize0        64
 bNumConfigurations      1
Device Status:     0x0001
 Self Powered


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