Re: [Libusb-win32-devel] Re: using libusb-win32 together with libftdi

[Cory S. <co...@mo...>]

Hi Jonathon,

Yes, I did get libftdi to work.  My problems turned out to be related
to Cygwin with the -mno-cygwin option.  Compiling libusb-win32,
libftdi, and my own application and libraries with MinGW/Msys solved
the issues I was having.  I admit it should not have made a
difference, but it did, and I'm glad it now works.

I have not tried Visual C++ so cannot provide any helpful hints for
that specifically.

One thing you should be aware of is that a read in libftdi may return
no payload (0 bytes).  So, I wrote a wrapper to perform a timed read
by continually polling ftdi_read_data until the requested number of
bytes were received or the timeout in milliseconds elapsed.  You may
need to do something similar in your code.

Best of luck,
Cory

On 4/21/06, Jonathon <j...@co...> wrote:
> How did you go Cory?
>
> Did you get libftdi working on libusb-win32 ??
>
> I'm working on a project doing that at the moment. I think I can get it
> all to build properly, but I'm using Visual C++
>
> J.

On 3/30/06, Cory Sharp <co...@mo...> wrote:
> I can get libftdi to work in Cygwin, but also experience issues you
> describe (read basically fails). I'm using libftdi 0.7 and have tried
> both libusb-win32 0.1.10.1 and CVS HEAD as of today.
>
> libftdi DOES work for me without problem providing I compile libftdi
> and my application *without* -mno-cygwin.  My ftdi/usb reads fail when
> I compile libftdi and my application with -mno-cygwin.
>
> Unfortunately, one of the things I'm building is a JNI DLL to be used
> by Java -- which pretty much requires -mno-cygwin.
>
> I can try to debug this, but I'd appreciate any suggestions about what
> kinds of things I should be looking for in particular, and where.
>
> Thanks, best,
> Cory
>
> ----- On 2006-01-09 03:23, <morper@te...> wrote:
>
> Has anyone tried to use libusb-win32 together with libftdi from
> intra2net? (http://www.intra2net.com/de/produkte/opensource/ftdi/index.ph=
p).
>
> I have the problem that, when I try to read data from the device via
> libftdi based on libusb-win32, I only receive some single bytes with
> very high values (between 248 and 255). Using the same software under
> Linux with libusb works correctly.
>
> Thanks for any suggestions.