If is very offtopic please excuse, I have this problem with libusb and a FX2 firmware that just spits out a number of packets when triggered by a command send to another endpoint :
I try to grab as many packets as I can in one bulk_read call but the call returns with only one packed data, no matter how big is the request I send, the program work for something like 3 times when it writes in system log something like: Sep 17 12:59:57 pcds-83150013032 kernel: ehci_hcd 0000:00:0a.2: qh df2ae880 (#18) state 1 after 3 runs it does not work at all, the user program returns with error code: Read Ret is -110 and in the system log it says: Sep 17 13:00:34 pcds-83150013032 kernel: usb 4-4: bulk timeout on ep2in Sep 17 13:00:34 pcds-83150013032 kernel: usb 4-4: usbfs: USBDEVFS_BULK failed ep 0x82 len 4096 ret -110 Some questions, I do not request 4096, the packet size is 448 and I request something like 600 of them, where comes the len 4096 in error message, is usbfs limited to some maximal transfer size or to just one packet per transfe, as far as I see the libusb is just a thin wrapper over the kernel functions, maybe I someone cand spread some light over this issue including if firmware may be broken or needs to behave differently ? Thank you for your kind help, Mircea Ciocan ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
