libftdi Archives

Subject: How to open the second channel on a FT2232H device?

From: Thomas Heller <theller@xxxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Date: Mon, 30 Apr 2012 13:48:55 +0200
I'm having problems opening the second channel on a FT2232H device
(Windows7 64 bit, using Xiafan Chen's 0.20 binary snapshot build).

I used the serial_test.exe program:

A) serial_text.exe -v 0x0403 -p 0x6010 -i 1 > null
B) serial_text.exe -v 0x0403 -p 0x6010 -i 2 > null

and tried different scenarios.

1. Using the FTDI driver, and installed libusb-win32 filter driver for
the USB-Compound device "vid:0403 pid6010 rev:0700" - both A) and B) work.

2. Using the FTDI driver, installed libusb-win32 filter drivers for
"vid:0403 pid:6010 rev:0700 mi:00" and "vid:0403 pid:6010 rev:0700 mi:01" USB Serial Converters. A) works, B) prints: unable to open ftdi device: -5 (unable to claim usb device. Make sure the default FTDI driver is not in use)

3. Using libusb-win32 drivers only, for both "USB Serial Converter (Interface 0)" and "USB Serial Converter (Interface 1)".
A) works, B) doesn't work.

Am I doing something wrong?  Must I install a libusb-win32 driver for
the compound device (if so - how)?


Thanks for any help,
Thomas

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