The problem is occurring **before** libusb_claim_interface is called. It is
happening on the open attempt. If I run xusb:
$ xusb 1cbe:00fd
Using libusb v1.0.19.10905
Opening device 1CBE:00FD...
Failed.
Now, if I am "uninstalling" (using device manager) the serial port device
(*usb\vid_1cbe&pid_00fd&mi_00*) I am getting this:
$ xusb 1cbe:00fd
Using libusb v1.0.19.10905
Opening device 1CBE:00FD...
Reading device descriptor:
length: 18
device class: 239
S/N: 3
VID:PID: 1CBE:00FD
bcdDevice: 0100
iMan:iProd:iSer: 1:2:3
nb confs: 1
Reading BOS descriptor: no descriptor
Reading first configuration descriptor:
nb interfaces: 4
interface[0]: id = 0
interface[0].altsetting[0]: num endpoints = 1
Class.SubClass.Protocol: 02.02.01
endpoint[0].address: 81
max packet size: 0010
polling interval: 01
interface[1]: id = 1
interface[1].altsetting[0]: num endpoints = 2
Class.SubClass.Protocol: 0A.00.00
endpoint[0].address: 82
max packet size: 0040
polling interval: 00
endpoint[1].address: 01
max packet size: 0040
polling interval: 00
interface[2]: id = 2
interface[2].altsetting[0]: num endpoints = 2
Class.SubClass.Protocol: FF.00.00
endpoint[0].address: 83
max packet size: 0040
polling interval: 00
endpoint[1].address: 02
max packet size: 0040
polling interval: 00
interface[3]: id = 3
interface[3].altsetting[0]: num endpoints = 0
Class.SubClass.Protocol: FE.01.01
Claiming interface 0...
Failed.
Claiming interface 1...
Failed.
Claiming interface 2...
Claiming interface 3...
Reading string descriptors:
String (0x01): "Texas Instruments"
String (0x02): "In-Circuit Debug Interface"
String (0x03): "0E20CDA0"
Releasing interface 0...
Releasing interface 1...
Releasing interface 2...
Releasing interface 3...
Closing device...
Note the "Claiming interface lines here". The openocd is failing now with
Debug: 221 715 ti_icdi_usb.c:692 icdi_usb_open(): transport: 2 vid:
0x1cbe pid:
0x00fd
Debug: 222 3004 ti_icdi_usb.c:706 icdi_usb_open(): claim interface
failed
Debug: 223 3011 hla_layout.c:49 hl_layout_open(): failed
See the attached Device Manager screenshot for reference. You will see three
devices installed:
Stellaris Virtual Serial Port
Stellaris ICDI DFU Device
Stellaris ICDI JTAG/SWD Interface
Hope it helps.
Attachment: devman.png (35.1 kB; image/png)
---
** [tickets:#96] ti_icdi_usb not choosing the right interface on Windows 8.1**
**Status:** new
**Milestone:** 0.9.0
**Created:** Tue Apr 28, 2015 10:10 PM UTC by Eugene Sh.
**Last Updated:** Wed Apr 29, 2015 02:55 PM UTC
**Owner:** nobody
The Tiva C launchpad with onboard TI ICDI is creating 3 different devices under
the same VID:PID. Using the `listdevs` example util from libusb-1.0 bundle:
1cbe:00fd (bus 3, device 3) path: 1.1
1cbe:00fd (bus 3, device 3) path: 1.1
And "Stellaris Virtual serial port" in addition. The ti_icdi_usb.c is using the
"libusb_open_device_with_vid_pid" function to find the FIRST device with the
given VID:PID and
attempt to open it, which is failing on Windows 8.1 (it worked on Windows 7).
It appears that the enumeration order have changed between the win versions.
[This patch](http://openocd.zylin.com/#/c/2527/) appears to address this issue
partially.
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