You know people already did some speed test between using libftdi
and libftd2xx under Windows using OpenOCD. The result is that
libftd2xx is much faster. So this does mean the basic libftdi
code (using libusb-0.1 and sync API) have problems no matter
what the upper OpenOCD does. So using the async API of
libftdi-1.0 could be a first step to try out for FTDI based JTAG
debuggers.
Also, if you start to do this, please make sure to not change in the
actual ft2232.c , but make an interface between ft2232.c to
libftdi-libusb, integrating the asynchronous read write support. This
will make asynchronous libftdi-libusb solution really close to the d2xx
solution ;-)
For now, if you want to speed up your OpenOCD , build OpenOCD with d2xx
driver :-) !
Regards,
Laurent
http://www.amontec.com
Amontec JTAGkey
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