On 29/05/13 01:17, qse drf wrote: > > That's the problem. The supposedly synchronous function calls each return > success > as I call them in order: OUT 1KB, IN 16B, OUT 1KB, IN 16B > But the bus trace shows: OUT 2KB, IN 16B, IN 16B > This is the case even if I add a 5 second delay after each call to > libusb_bulk_transfer. >
Which bus analyser are you using? Can you expand the transfers and see the timing of individual packets for that transfer? If the host isn't sending a ZLP then the bus analyser (or it's software) might be grouping all 4 out data packets into the same transfer as it has no way of knowing that they were separate transfers. Regards, Toby ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
