On 21/06/2011, at 5:01 PM, Xiaofan Chen wrote:

> On Tue, Jun 21, 2011 at 2:55 PM, Xiaofan Chen <xiaof...@gmail.com> wrote:
>>> But are you sure to have the correct libusb version. On linux and mac, the
>>> libusb is the kernel driver for the d2xx.
>> 
>> This has been discussed before and I think in this case an exception should
>> be granted and the patch should be accepted.
>> 
>> Thread:
>> http://lists.berlios.de/pipermail/openocd-development/2011-March/018422.html
>> 
>> I was suggesting the user to use the open source libftdi and libftdi-1.0
>> under Linux instead but D2XX might still have some benefits so that
>> users may still want to use it.
>> 
> 
> It is a long thread but I was able to reproduce the error.
> http://lists.berlios.de/pipermail/openocd-development/2011-March/018434.html
> "I think the latest d2xx library needs some fix from the OpenOCD
> side or from the d2xx side."
> 
> It is more difficult to ask FTDI for a fix so it may better to fix this from
> OpenOCD side. Therefore I think the patch should be accepted.
> 
> When FTDI fixes D2xx, then probably the patch can be reverted.

I have reported the problem to FTDI, but in my experience we can not
expect a response soon, if ever.
I think there are two options, either apply the patch as a workaround
(note that the returned value is *never* used), or remove support for D2XX.

Cheers,
Steve

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