I believe I did exactly what is expecting, because I did the same thing in
Window's API and it did not timeout, if you please look at the trace file I
attached, there is not difference in turns of parameters I am passing to
USB Device (between window's API vs LibUSB, Only difference is the
TransferBuffer and PipeHandler , which I believe they should be different.).
any other ideas?
thx
On Mon, Aug 27, 2012 at 2:06 AM, Xiaofan Chen <xiaof...@gmail.com> wrote:
> On Mon, Aug 27, 2012 at 9:02 AM, John Chen <john...@gmail.com> wrote:
> > Hi,I just trying to do a simple bulk read, and always got a TIMEOUT,
> would
> > any one please tell me what I did wrong here?
>
> Most likely the device does not understand the command/data your
> host program sends to it. For example, the device may need some
> initialization to start the Bulk IN transfer.
>
> Do you know the communication protocol of the device? If not,
> you need to start with some reverse engineering. BTW, for
> starting, it is easier to use the simpler synchronous API
> to get the basics right and then you can use the asynchronous
> API.
>
> --
> Xiaofan
>
>
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