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I assume RailDriver is similar to X-Keys. > > The X-Keys SDK actually provides a couple of extra features beyond what > HIDAPI normally does that you might be interested in, I couldn't copy the same file to the SD card. http://p.sf.net/sfu/NeoTech _______________________________________________ libusb-devel mailing list [email protected] When I tried interrupt mode, I got no error in real time. Check This Out

In Windows, the new kernel-mode driver framework (KMDF), which is used by virtually all new drivers, didn't support isochronous until Win 8.1, some 10 years after its initial release, because no Based on the name, I think you got that number from the length of the endpoint descriptor. Your buffers always need to be an integer multiple of the max packet size.  The max packet size includes the "number of transactions" multiplier in high speed, and the burst multiplier Please don't fill out this field. https://github.com/OpenKinect/libfreenect2/issues/617

From: 黄荣存 - 2012-05-10 10:56:15 Attachments: Message as HTML So sorry, the reason is that: our device has broken, we change another one and it works OK now. I'll have a look into making USB errors fatal. The tradeoff for that efficiency is increased latency.  If you send down that megabyte buffer, you can't process any of the data until the whole thing is filled.  There are some Please show us your code and yourdescriptors, and we'll see what you might be doing wrong.By the way, NEVER blame the kernel first.

I'm sure you are right, but what would then be a good standard device to use if the OP is serious about learning to do ISOC? The maximum packet size in the endpoint descriptor(wMaxPacketSize).  That's very different from the descriptor length,which will always be 7 bytes (OK, sometimes it's 9 bytes).Your buffers always need to be an You have fundamental USB issues here. -- Tim Roberts, [email protected] Providenza & Boekelheide, Inc.

It is simply a waste of time to reinvent all of that hard-fought and well-tested code in the standard audio class driver. > I tried every example I found in web, Integral calculus sine functions Is using "you" to refer to anyone, not the person you're talking to, a known, specific grammar form? The transfers have tomatch the endpoint type.Post by mau[submit_iso_transfer] submiturb failed error -1 errno:16I have been getting the libusb error enum printed: LIBUSB_ERROR_IOI tried all the end point descirptor, max packet Why is this child portrait not compelling?

If it does I will write this as answer. It is of course based > on HIDAPI, and comes with a test GUI program. By the way, output of Valgrind points r = libusb_init(&ctx); Thank you for your time. And this is unavoidable if the kernel allocates memory on each transfer.

All that tells you is how long the endpoint descriptor itself is. http://stackoverflow.com/questions/37368506/libusb-libusb-error-io-when-transferring [email protected]:~/Downloads$ go-mtpfs -android=false /media/MyAndroid 2013/02/17 17:28:14 starting FUSE unknown 2013/02/17 17:28:31 fetched "device.nng", 264 bytes in 16 ms. 0.0 MB/s 2013/02/17 17:28:31 Unimplemented opcode POLL 2013/02/17 17:28:48 fetched ".profig.os", 36 bytes There are some applications where that doesn't matter -- you have to know what you're doing with the data to make that decision. -- Tim Roberts, [email protected] You signed out in another tab or window.

You allocate a libusb context,then enumerate all the devices, then ask the user to pick one, then opena handle, set configuration, release any kernel driver, and claim aninterface. Ubuntu 13.04 has MTP with GVFS support, that's why I'm not testing it in 13.04 (the device is mounted through MTP even if Go-mtpfs fails like I wrote in the initial Further, the packet size you use must match the value in the alternate setting you choose. One oddness with the RailDriver is that it is also an output device: it has a three digit 'speedometer' (three 7-segment LED digits) and has a switch for a powered speaker.

Providenza & Boekelheide, Inc. ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. You should figure out how to make GVFS/Nautilus leave alone the MTP device. The maximum packet size in the endpoint descriptor (wMaxPacketSize).That's very different from the descriptor length, which will always be 7bytes (OK, sometimes it's 9 bytes).Your buffers always need to be an this contact form I am right in assuming I need to use interrupt communication with this device, judging from the transfer type, under the endpoint descriptor?

Upon exit, using ...View on libusb.6.n5.nabble.com Preview by Yahoo ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------#include#include#include #include #include //#include#include#include#include#include#include#include "CusbReadWrite.h"using namespace std;CusbReadWrite::CusbReadWrite(){    //ctor    // Video    EndPointISOIn=EndPointISOVideoAddressIn;    MaxPacketSizeIn=MaxPacketSizeVideoIn;    // Audio    //MaxPacketSizeIn=MaxPacketSizeAudioIn;    //EndPointISOIn=EndPointISOAudioAddressIn;}CusbReadWrite::~CusbReadWrite(){    //dtor}// USB aygıtından veri okunmasıvoid CusbReadWrite::ReadWriteDataViaUSBDev(){    //ctor    Google Grupları Tartışma Forumları'nı kullanmak için lütfen tarayıcı ayarlarınızda JavaScript'i etkinleştirin ve sonra bu sayfayı yenileyin. . DON'T DO THAT.

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If you send down a megabyte, the hardware will keepfilling that buffer until it is done. That might help figure out if the problem is with your specific application or with deployment in general. How to professionally handle sexist remarks by a student? The code *used* to work with the libusb-0.1 API, but now fails with the libusb-1.0 API and I am trying to figure out why. -- Robert Heller -- 978-544-6933 / [email protected]

isochronous mode.I want to learn isochronous because audio device is for only a current project,projects varies from audio to RF etc.If it looks like an audio device, you should use the It's trying to fetch video.mkv 2013/02/18 22:57:05 MTP request GetObjectInfo [59275] 2013/02/18 22:57:05 MTP data 0x78 bytes 2013/02/18 22:57:05 MTP response OK [] 2013/02/18 22:57:05 MTP decoded &mtp.ObjectInfo{StorageID:0x10001,
ObjectFormat:0x3000, ProtectionStatus:0x0, CompressedSize:0x44c000,
Han-Wen Nienhuys - [email protected] - http://www.xs4all.nl/~hanwen hotice commented Feb 18, 2013 Sorry for the delay! navigate here Upon exit, using ...

enabling more aggressive memory reclaim echo 1 > /proc/sys/vm/zone_reclaim_mode manually compacting memory echo 1 > /proc/sys/vm/compact_memory this is useful for recreating larger memory blocks after closing memory-intensive applications and avoids a These streams operate in real-time. Then I followed tutorials, discussions, forms etc. Generate all brace-strings of length n What is this aircraft with elaborate folding wings?

By the way, I have no kernel experience actually, :) . There are several problems with this.Audio and video devices use "alternate settings" to allow multiplechoices for the bandwidth they reserve. For efficiency, you generally want to use a large buffer. Those are good steps.

Are you using nautilus, is it trying to do some preview of the corrupted video file? DON'T DOTHAT. Providenza & Boekelheide, Inc. The twocanonical cases are video and audio, and in both cases there are alreadystandard system drivers to handle them.

Here's the output: [email protected]:~$ /tmp/go/bin/go-mtpfs /media/MyAndroid/ 2013/02/17 19:23:59 starting FUSE unknown c2013/02/17 19:25:00 fatal error got type 0 (CONTAINER_UNDEFINED) in response, want CONTAINER_RESPONSE.; closing connection. 2013/02/17 19:25:00 AndroidGetPartialObject64 failed: got type We will not be liable for direct, indirect, special or consequential damages arising from alteration of the contents of this message by a third party or as a result of any Also, deleting files from the SD card or internal storage displayed the same input/output error: "Error removing file: Input/output error". Let's assume you want to send 8 packets in each transfer.

Han-Wen Nienhuys - [email protected] - http://www.xs4all.nl/~hanwen Owner hanwen commented Feb 19, 2013 scratch that; I fixed the beyond EOF isssue in go-mtpfs. Because I am still trying to understand better.The length of the descriptor has nothing to do with your buffering.You have to decide your buffer sizes, based on a couple of things:1. I also have this problem >> > *output* endpoint is working just fine, but the input is just getting a >> > -1 status (LIBUSB_ERROR_IO) > That is a very old