Tim - Thanks for the email, I’m sorry, that was my bad.
you can change that to the following: libusb_control_transfer(handle, 0x42, 0x3, variable1, variable2, buf[1], 1, 500); Maybe that answers my question. I don’t have endpoint 3 on my device, so maybe winusb is restricting communication where libusbk is not? Thanks so much Tim. Very Sincerely, Jason On Dec 26, 2013, at 9:58 AM, Tim Roberts <t...@probo.com> wrote: > Jason Kotzin wrote: >> In windows, 8.1, I’m sending a vendor specific control request that looks >> like the following: >> >> Broken down, this is what an example looks like where variable1 and >> variable2 can be 0-255 >> >> rq = fl_send_msg(0x42, 0x3, variable1, variable2, buf[1], 1, 500) > > Since we don't know what "fl_send_msg" is, it's a little hard to make an > assessment. Are those parameters RequestType, Request, Index, and > Value? Are you trying to send a buffer there? > > >> The result is that the transfer fails with error code 87, “the parameter is >> incorrect”. > > You are sending an outgoing vendor request to an endpoint. If the > second parameter is Request, then you are sending to endpoint 3. To do > that, Windows requires that you actually "own" the interface that > contains endpoint 3. Have you already done that? It looks like you > claimed interface 1. Does that hold endpoint 3? > > -- > Tim Roberts, t...@probo.com > Providenza & Boekelheide, Inc. > > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > _______________________________________________ > libusbx-devel mailing list > libusbx-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libusbx-devel ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
