Re: how can I get usb port number?

["E.S. Rosenberg" <es.rosenberg+libftdi.i2net@xxxxxxxxx>]

I don't know if you can get the port number easily (or if it will be meaningful), but in a project I worked on we used the chips' serial number to differentiate between multiple chips present.

You can find the code here:
https://github.com/OpenLightingProject/ola/blob/master/plugins/ftdidmx/FtdiWidget.cpp

We used ftdi_usb_get_strings() - see line 143.

HTH,

Eli

2015-08-31 17:58 GMT+03:00 <Bryan.Richmond@xxxxxxxxxxx>:

I'm trying to figure out a way to find out which usb port a device is connected to.  I have mulitiple of the same type of FT2232H chips hooked up.  

libusb has this command libusb_get_port_numbers. but it takes a libusb_device as an argument.

I tried to use libusb_get_device((&ftdic)->usb_dev), but this gave me a segfault.

Any help would be extremely appreciated. 


Bryan T. Richmond
Software Engineer
Environmental Sensors

INFICON, Inc
2 Technology Place
East Syracuse, NY 13057-9714

Phone: (315) 434-2559
Fax:      (315) 437-3803

E-Mail: bryan.richmond@xxxxxxxxxxx
Web: www.INFICON.com

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