On Sat, Jan 14, 2012 at 6:32 PM, Rolf Fiedler <derRolf@xxxxxxxxxxxxxx> wrote:
> So my questions to the list would be:
> - is a flow control problem with ftdi_read_data() known?
> - how would I best debug this (since the issue only occurs at
> high data rate I might not be able to printf-debug this)?
> - Is virtual box also using libusb? If so, the problem would appear
> to be in libftdi, otherwise it could also be an libusb issue.
>
> When I get to work next week, I will also do tests on Linux.
> Maybe this is a MacOS X only issue.
>
> Any help is much appreciated,
Just some idea to troubleshoot this issue.
1) What is the version of libusb-1.0 and libftdi-1.0 are you using?
For libusb-1.0, try to use libusb.git and not the released 1.0.8 version
which has many known problems under Mac OS X (as well as Linux).
http://git.libusb.org/?p=libusb.git;a=shortlog;js=1
2) Try to use d2xx under Mac OS X to see if that helps. The
latest version of d2xx under Linux and Mac OS X are based
on libusb-1.0.
--
Xiaofan
--
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