7 Aug
2012
7 Aug
'12
4:11 p.m.
On 07/08/12 14:54, Peter Stuge wrote:
Hi Chris,
Christian Gagneraud wrote:
Hi Peter,
Please find attached the full log. I can provide u with a simple python
program, but it will depends on gnuradio, gr-osmosdr and you will need a
compatible device plugged in as well.
Chris
Another "bug" I discovered is that if
you just do a device scan to print
available device and exit the python script, it will generate plenty of
error messages like "libusb:warning [cancel_bulk_transfer] unrecognised
discard errno 9", the workaround is to simply wait a bit before exiting.
It seems that some USB packets are still pending after calling
osmosdr.source_c().
I'm interested in this since I'm the libusb maintainer.
Error 9 means that ioctl() returns "Invalid file descriptor" - so the
fd that came from open():ing the device has since become invalid. I
would appreciate if you can provide a short (python) program to
reproduce this error, or perhaps you can provide a debug log,
according to the http://libusb.org/wiki/debug page. It shouldn't happen.
Thanks
//Peter
--
Christian Gagneraud,
Embedded systems engineer.
Techworks Marine
1 Harbour road
Dun Laoghaire
Co. Dublin
Ireland
Tel: + 353 (0) 1 236 5990
Web: http://www.techworks.ie/