Re: [OpenOCD-user] Error "unable to get latency timer" with a cheap USB-Blaster clone

[Xiaofan C. <xia...@gm...>]

On Thu, Mar 7, 2013 at 1:52 PM, Xiaofan Chen <xia...@gm...> wrote:
> On Mon, Feb 25, 2013 at 11:28 PM, R. Diez <rdi...@ya...> wrote:
>> I bought a few months ago a cheap USB-Blaster clone, and now I have an Arduino Due I want to test it with.
>>
>> I am building OpenOCD like this:
>>
>>   git clone git://openocd.git.sourceforge.net/gitroot/openocd/openocd
>>   cd openocd
>>   ./bootstrap
>>   ./configure --enable-maintainer-mode  --enable-usb_blaster_libftdi --prefix=$HOME/rdiez/arduino/openocd/openocd-bin
>>   make -j 5
>>   make install
>>
>> Then I tried to run it like this:
>>
>>   ~/rdiez/arduino/openocd/openocd-bin/bin/openocd -f interface/altera-usb-blaster.cfg -d 3
>>
>> I am getting this error:
>>
>>   Error: 66 6 usb_blaster.c:451 usb_blaster_init(): unable to get latency timer
>>
>> Please see the full log below. I am running Ubuntu 12.04.
>>
>> I tried searching the Internet for answers, and I came across this message:
>>
>>   http://www.mail-archive.com/ope...@li.../msg17192.html
>>
>> However,
>>  I couldn't make out the status of that patch. The other information I
>> have found was either not applicable (lib ftd2xx instead of libftdi) or
>> got me confused.
>>
>> Can anybody help?
>>
>> Please copy me on the answers, as I am not subscribed to this list.
>
> It could be the problem with libftdi 0.xx. Which version of libftdi are
> you using? 0.20 is the latest one for the legacy libftdi-0.x release.
>
> I remember that libftdi1-1.0 could help this last time
> with one of the users. libftdi1-1.0 has been formally released recently,
> but then the library name is changed so there may be minor changes
> needed to build with libftdi1-1.0 instead of libftdi-0.xx.

Okay I think the issue is with your cheap clone of USB Blaster.

Please refer to this thread and try the patch.
http://lists.berlios.de/pipermail/openocd-development/2011-June/019820.html
"The USB Blaster clone does not use the original FT245 chip, and so
it tries to emulate its behavior.
As it turns out, the API call FT_GetLatencyTimer is not properly
emulated by the clone, and this makes OpenOCD abort. In reality, this
API call is not necessary, so I have removed this call."

-- 
Xiaofan