Hello List,

some notes on the libftdi version and performance.
I have tested the r2240 with libftdi an could
achive about 140KB/sec. 

Unfortunately I could not test the fd2xx with r2240,
here it looks that it is broken. 

But the r1888 with ftd2xx looks like the same performance, 
here about 140KB/sec too. 

I will double check it again if a SVN build is working
with libftdi and ftd2xx.

Tested on WindowsXP and Insight. Download a huge
file into RAM of the target.

>From the point of performance I think we can switch.
The other problem is the installed ftd2xx base. I think
it makes a problem to install a libftdi driver over an
existing ftd2xx driver. Before the user can use a new
windows version of OpenOCD based on libftdi, they must
deinstall the ftd2xx driver with FTClean. This is
possible and was working here.

But how does the functionality looks like if we compare
libftdi against the ftd2xx driver? Will the new high speed
hardware supported by the libftdi driver too?

Best regards,

Michael
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