Hi, I'm playing with functionfs and use configfs + functionfs + ffs-test from kernel to test connection between my device and host. ffs-test example provide 1 configuration with 1 interface and with 2 bulk endpoints. I'm writing application which will write/read data to usb device but can be accessed from other multiple application. I'm planning to write kind of gatekeeper which will serialize data to endpoint and notify reader about received data. I was thinking about other possibility to extend gadget to provide more endpoints (like 2). I was able to extend ffs-test and also I can send/receive data (using libusb) over original endpoints but not over new created one (I've run 2 instances of same application which basically create transfers for 2 different endpoints) but when running second application I got this error: libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=16 libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=16 I'm not USB expert but multiple endpoint should be possible (maybe I need to put them to other interface?-> tried that also but got same error as above with errno=2). Thanks for any pointers and advice. BR, marek -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite twitter: #opennandra web: http://open-nandra.com
