I'm not sure what you mean. Windows installed the libusb device driver
for both interfaces so they both show up in the device manager. They
have the same manufacturer and device identifier so I'm not sure how to
tell them apart and address the second one. Do you know the correct
calls into libftdi to open the second interface?
On 9/29/2011 4:54 AM, Uwe Bonnes wrote:
"Michael" == Michael Wilt<mike@xxxxxxxxx> writes:
Michael> I have an FT2232H working under Windows XP. I can make the
Michael> first interface work just fine, but I can't get the second
Michael> interface to work. If I pass an index of 1 to
Michael> ftdi_usb_open_desc_index it always gets "device unavailable" on
Michael> subsequent calls. If I just open the first device and try to
Michael> specify INTERFACE_B or any other value to ftdispi_open I always
Michael> get usb bulk write failed on subsequent calls. I noticed that
Michael> ftdispi_open ignores the interface argument so I changed the
Michael> call to ftdi_set_interface to use this argument. Is anyone
Michael> having success with the second interface of the FT2232H?
Did you announce the second interface to libusb32-win?
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