Hi Alan,
The OpenOCD and Amontec JTAGkey dongles works with both libftdi ( libusb
) and d2xx drivers on both Windows and Linux OS.
Actually, we still have a lot of users using d2xx for the speed
advantage on Windows (not really faster on Linux). Some are going with
the libftdi for the open source advantage.
For the Windows users, 75% of JTAGkey users, Amontec offers now a
certified / signed JTAGkey driver based d2xx ( from xp to windows 7 on
32bits and 64 bits).
Building / using OpenOCD with libftdi on Microsoft Vista 64bit or
windows 7 is really not easy, but with the JTAGkey signed driver is
REALLY SUPER easy.
(OK you will say : GO with Linux. I will reply you YES. But 75% of the
users just want to stay on Microsoft. And Microsoft say you : please
sign your software/drivers ;-( )
After finishing our next JTAGkey-3, we hope to have time to give more
supports on the libftdi.
Anyway, thanks for your advices.
Regards,
Laurent Gauch
http://www.amontec.com
Alan Carvalho de Assis wrote:
Hi Laurent,
I think it is not true for new libftdi version.
Also I think it is not a good idea using your modified binary.
Then I few more comfortable using Xverse Signalizer on Linux, it works
correctly with standard libftdi. Unfortunately it is not high speed
USB.
Don't get me wrong, I don't have any relation with Xverse and I think
JTAGkey-2 is a great device, you only need add better support to
libftdi since many openocd user are on Linux.
Just my 2 cents,
Alan
On 3/10/10, Laurent Gauch <laurent.ga...@amontec.com> wrote:
Hi,
The NXP LPC2468 provide RTCK.
Also, the Amontec JTAGkey-2 provides RTCK support, but this must be
activated in your openocd configuration file .
Note: the Amontec JTAGkey does not provides RTCK support.
The advantage of the RTCK is that you can try to up the JTAGkey-2 TCK
frequency to his maximum 30MHz. The LPC2468 will regulate the TCK
frequency by RTCK.
With this mechanism, you are sure to go as fast as your JTAG chain
allows you.
For sure with using jtag_rtck you will get better performance.
Also, for windwos, you should use our new driver from
http://www.amontec.com/download/amontec-jtagkey-driver-d2xx-20091124.zip
This new driver is signed and microsoft WHQL certified. It is signed for
both 32 bit and 64bits OS from XP to windows 7 and server 2008 .
It works for all JTAGkey dongles, and it is based on FTDI d2xx driver.
Actually, the FTDI d2xx driver is still much faster than LIBFTDI +
LIBUSB ...
If you are Linux only try using FTDI d2xx driver ;-) !
But the actual linux d2xx driver do not provide the same performances as
the windows performance.
Regards,
Laurent Gauch
http://www.amontec.com
Custom LPC2468 HW with SST 39VF6401B flash.
-----Original Message-----
From: Øyvind Harboe [mailto:oyvind.harboe at zylin.com
<https://lists.berlios.de/mailman/listinfo/openocd-development>]
Sent: 10. marts 2010 09:41
To: Flemming Futtrup
Cc: Alain Mouette; openocd-development at lists.berlios.de
<https://lists.berlios.de/mailman/listinfo/openocd-development>
Subject: Re: [Openocd-development] Amontec JtagKey2 ??
/ I our company we use both Amontec Tiny and Key2 and I have not seen
much
/>/ speed difference(could be target HW limitations or my lack of
skills
but
/>/ we achieve following flashload rates - tiny: 43 kb/s - key2: 51.6
kb/s).
/
What target?
--
Øyvind Harboe
US toll free 1-866-980-3434 / International +47 51 63 25 00
http://www.zylin.com/zy1000.html
ARM7 ARM9 ARM11 XScale Cortex
JTAG debugger and flash programmer
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