On Thu, Oct 30, 2014 at 1:41 PM, Xiaofan Chen <xiaof...@gmail.com> wrote:
> On Thu, Oct 30, 2014 at 12:21 PM, Paul Fertser <fercer...@gmail.com> wrote:
>> Hello,
>>
>> On Wed, Oct 29, 2014 at 09:09:13PM +0000, Christian Bjørge Thoresen wrote:
>>> I don't think I tried to install the official drivers, but I'll
>>> still try to check if they might have something to do with
>>> this.
>>
>> AFAIK, OS X comes with drivers for FTDI preinstalled, and you need to
>> manually kextunload them, please see README.OSX in the OpenOCD source
>> directory.
>>
>
> In this case no, the OP has the TAMPA TIAO FTDI which does not use
> the default VID/PID combination from FTDI. Unless the OP has edited
> the config file for the driver, the FTDI driver will not be attached to the
> device.
> Ref: 
> http://www.tiaowiki.com/w/How_to_install_TIAO_USB_Multi_Protocol_Adapter_Driver_on_Mac_OS

The above reference is talking about FTDI vendor driver, for newer
version of Mac OS X (10.9/10.10), Apple provides its own driver
as well. But again, that driver only attaches to some defaults VID/PID
combinations. So that does not change the conclusions here.

> Moreover, if the FTDI driver is attached to the device, then libusb/OpenOCD
> will not be able to claim the interface and the error message will be totally
> different.
>
> To OP: what is the libusb version you are using? Please try to upgrade
> libusb to the latest 1.0.19 release version to see if that helps.



-- 
Xiaofan

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