Libusb bulk transfer It configures the pipe to send a zero-length packet at the end of the transfer. libusb offers both a synchronous and an asynchronous interface to performing USB transfers. 00 Sep 22, 2016 · The libusb_bulk_transfer returns 0(success) while bulk reading. The timeout value is given in milliseconds. 以下是我目前包含的库 On Mon, 25 Aug 2014, Miguel Seabra wrote: > First of all a big thank you to everyone for this mailing list, > I have a Belkin Easy USB transfer cable which i need to transfer data > between linux machines. 6 package. h> #define MFGR_ID 0 // given manufacturer ID #define DEV_ID 0 // given device ID /* If device IDs are not known, use libusb_get_device_list() to see a list of all USB devices connected to the Jan 16, 2018 · When you send to usb device via libusb_bulk_transfer, your data is what is send to device attached to your computer. See full list on libusb. I observe that my USB device gets detached. Detach the kernel driver via libusb_detach_kernel_driver. Feb 8, 2013 · I am trying to perform read and write operations on a pen drive. A timeout value of zero means no timeout. next i need to create a desktop console version using libusb. 小奥呀: 求助，请问解决了返回-1的问题了吗. WinUSB asks for 2MiB (MAXIMUM_TRANSFER_SIZE). 8 and libusb 1. #define BULK_EP_OUT 0x02 #define Contribute to crazybaoli/libusb-test development by creating an account on GitHub. h> #include <err. But I can abl Dec 20, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. What device does to data received depends on firmware of device. The file will have one of the following names: libusb-1. We have to use the function int libusb_bulk_transfer(struct libusb_device_handle * dev_handle, unsigned char endpoint, unsigned char * data,int length,int * transferred,unsigned int timeout) May 4, 2018 · libusb_bulk_transfer() has a parameter length to specify how long is the data the host wants to read IN, and another parameter transferred indicating how much data Aug 18, 2020 · int libusb_bulk_transfer(struct libusb_device_handle *devh, unsigned char endpoint, unsigned char *data, int length, int *transferred, unsigned int timeout) Perform an USB bulk transfer. Jan 10, 2017 · I have same problem in beaglebone black and installed ubuntu OS in it. I have written a c++ program in Ubuntu, I can connect to the device, I transfer some data to the device using libusb_bulk_transfer(). com>;"lfjking"<lfjking@qq. 04. Mar 10, 2022 · That comment deals with a different libusb API, so make sure to check the correct docs for the one being called here (libusb_bulk_transfer). Using of function libusb_bulk_transfer: libusb_bulk_transfer(handle, endpoi Jan 3, 2017 · In USB protocol the host device initiates any transfer, for example a bulk transfer. Using this example on a usb device it was not designed for could be catastrophic! To meet the requirements, your usb hardware must implement loopback functionality in Config 1, Interface 0, Endpoints 0x01 and 0x81. But when my simple driver hung up after I commented out that line; So I inserted some debug-prints here and there and found out that libusb_open locks up forever, no matter which device I issued it on. I have seen submit_bulk_transfer function in libusb-1. No matter how I adjust dataBuffer or bufferLength or timeout. h> #include <libusb. I am not able to find the endpoint of my USB port. . 3 LTS. edu> * Copyright Jul 27, 2016 · I am using libusb_bulk_transfer to read from serial. interrupt transfer. Reload to refresh your session. I chose to use libusb to develop it. 0) which will communicate with a custom USB device (currently being programmed by a co-worker). The main difference is that the synchronous interface combines both steps indicated above into a single function call, whereas the asynchronous interface separates them. Jan 16, 2024 · USB bulk transfer code example. This seems so janky that it couldn't possibly be the proper implementation Dec 12, 2022 · when I use libusb_fill_bulk_transfer() to recreived my hardware，the theoretical speed should reach 62. Can you provide a example which use bulk streams to transmit and receive data. io You can either fill the required fields yourself or you can use the helper functions: libusb_fill_control_transfer(), libusb_fill_bulk_transfer() and libusb_fill_interrupt_transfer(). Set libusb-1. Thanks & Regards, Krishna Chaitanya. 4. But if I try to receive data I'm getting a Jun 21, 2015 · That makes sense. c). 027190 Mar 21, 2020 · Hi, I use LPC4370 in one of my projects and started experiencing issues with USB bulk data transfer when connecting the device to a host computer running in a virtual environment. Mar 1, 2023 · I'm accessing a TI TMS320F2075 MCU using LibUSB v1. I am able to successfully perform the following steps:1. My code snippet as follows: Aug 27, 2015 · I'm completely new to Libusb. The example sends data to the first bulk OUT pipe on the default interface. I want to transfer the file not as raw data. Submission When you have allocated a transfer and filled it, you can submit it using libusb_submit_transfer() . And the actual read length transferred is the same as length. Basically, apparently, for ~reasons~, the endpoints for my device are attached to configuration 0, alternate setting 1. h> #include <unistd. #include <stdio. When the transfer is complete, number of bytes are shown. The first Libusb transfer is 1-4 and the second libusb transfer /* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ /* * Core functions for libusb * Copyright © 2012-2023 Nathan Hjelm <hjelmn@cs. The device sends 16B, and the state of that transfer is now USBD_STATUS_SUCCESS. Picking the correct endpoint is done through trial and error, as far as we are aware See below documentation on how to use the libusb_bulk_transfer function to send and receive raw data synchronously via usb. Why do you call it several times in a for loop when trying to send the data? One call should be enough, isn't it? int libusb_bulk_transfer (struct libusb_device_handle *devh, unsigned char endpoint, unsigned char *data, int length, int *transferred, unsigned int timeout) Perform an USB bulk transfer. See function parameters, return values and error codes for each function. com>; Cc: "Author"<author@noreply. This function returns immediately but can be You can either fill the required fields yourself or you can use the helper functions: libusb_fill_control_transfer(), libusb_fill_bulk_transfer() and libusb_fill_interrupt_transfer(). Jun 13, 2021 · The internal function name may need to be changed even though it does not matter in reality. 027147] [00002baa] libusb: debug [libusb_get_device_list] [ 0. 0. idProduct 0x0022 bcdDevice 0. In essence, calling this function ends up with a request to the xHCI hardware controller to receive a given number of bytes (“bufsize” above) from the endpoint, and to write it into a buffer (“buf” above). Contribute to pyusb/pyusb development by creating an account on GitHub. sudo . Step 1 is to have a "heartbeat" going back and May 19, 2022 · libusb_bulk_transfer fucntions be invoked multiple times. Jul 3, 2024 · libusb_bulk_transfer err: [ 0. Dec 7, 2019 · The term “transfer” in the “libusb_bulk_transfer” function name refers to a USB transfer cycle. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2. But the buffer readed data is empty with 0. I am using libUsb for my code. Apr 3, 2021 · 「handle と desc を使って何かする」の部分でもっといろいろやるには、libusb_control_transfer() や libusb_bulk_transfer() といった関数を使う。これらの関数の使い方はUSBデバイスのほうの実装によるので、ここでは省略。 コンパイルと実行 Aug 4, 2013 · I'm writing a Linux program (using Qt 4. The problem was in libusb_bulk_transfer() call where I passed the pointer of a pointer :(The correct code is: ret = libusb_bulk_transfer( devHandle, EP_OUT, (unsigned char*)cmdPrinter, nCmdSize, &wrote, timeout); Now I see the data end the commands are executed. Thanks in advance. Mar 2, 2022 · Writing Successful! libusb: debug [libusb_alloc_transfer] transfer 0x563230a5b760 libusb: debug [libusb_submit_transfer] transfer 0x563230a5b760 libusb: debug [add_to_flying_list] arm timerfd for timeout in 1000ms (first in line) libusb: debug [submit_bulk_transfer] need 1 urbs for new transfer with length 8 libusb: debug [libusb_handle_events Example interfacing an STM32F4 Discovery board with libusb usign ChibiOS - Mathias-L/STM32F4-libusb-example Jun 25, 2011 · I thought myself that libusb_interrupt_transfer were blocking forever, even though I had set a timeout for 500ms. Jun 25, 2014 · libusb_open(device, &deviceHandle); returns 0 but libusb_bulk_transfer(deviceHandle, 0x81, data1, 512, &len, 0); return -5 so I try to find error code -5 using printf Jul 4, 2019 · I need to retrieve data from a controller that emit a kind of stream of data through an USB port. Contribute to tytouf/libusb-cdc-example development by creating an account on GitHub. Callstack (EXC_BAD_ACCESS): list_del remove_from_flying_list libusb_submit_transfer do_sync_bulk_transfer libusb_bulk_transfer Apr 3, 2015 · I am trying to run this program for sending data using libusb. I am calling libusb_bulk_transfer() to read 48 bytes on an input endpoint (i. int I always see the bulk out on the STM32, but I never see the bulk in request. I think like the problem is that even though do_sync_bulk_transfer propagates timeout to libusb_fill_bulk_transfer, sync_transfer_wait_for_completion still blocks despite it, as it uses libusb_handle_events_completed. /libusb -b or sudo . May 12, 2022 · The pseudocode libUSB bulk transfer loop increments and requests 2098192B again. 26 on Windows 11 22H2. My smart card reader is ACR122U. Nov 23, 2021 · Still, that does not seem to work! The return code of both libusb_bulk_transfer is 0 (success), the first one says it sent buffer_len bytes (as expected), and the second one says it sent 0 bytes (as expected). However, the size of the buffer is not communicated to the device - the device is just asked to send any amount of data. When I connected my USB device to Linux, I could not receive data, timeout, but I connected the USB device to Windows, opened the serial port with the serial port debugging tool, and unplugged the Dec 13, 2023 · You signed in with another tab or window. Every time I get to the libusb_claim_interface call the program crashes in usbi_signal_transfer_completion which as you can see is not in the code below. When requesting data on a bulk endpoint, libusb requires you to supply a buffer and the maximum number of bytes of data that libusb can put in that buffer. When you have allocated a transfer and filled it, you can submit it using libusb_submit_transfer(). static void libusb_fill_bulk_transfer (struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *buffer, int length, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout) This is a simple libusb bulk transfer demo. Apr 18, 2023 · Bus 003 Device 002: ID 0c26:0022 Prolific Technology Inc. thanks for the additional info - very useful I am using libusb 1. 815704] Dec 3, 2012 · Perform a USB control transfer. I don't understand what's wrong. Feb 7, 2015 · I am trying to perform write/read libusb_bulk_transfer() on my USB mass storage device. also see the API, which is great!. 0Config. Jun 24, 2019 · 我如何正确调用libusb_bulk_transfer？ 目前我每次都收到错误“LIBUSB_ERROR_NOT_FOUND”，我收到的数据是“P”。 我用'libusb_interrupt_transfer'换掉了函数'libusb_bulk_transfer'，但我仍然收到同样的错误：LIBUSB_ERROR_NOT_FOUND. 11) get errors, that is the log: [149. github. 25 (latest release) on Win10 to communicate with a USB device via the libusb-win32 v1. Sign in. read) but it's returning a tim libusb之libusb_bulk_transfer之完整实例. 2. Fill the bulk transfer via libusb_fill_bulk_transfer. I should probably pose this as a new question, but do you have an idea, why an Arduino CDC to ACM serial to USB would send such zero-length packets? Feb 25, 2022 · Helper function to populate the required \ref libusb_transfer fields for a bulk transfer. The control transfer I tried randomly switching the variables after the most logical ways of filling them had ran Oct 22, 2013 · The lib_usb api defines the function libusb_fill_bulk_transfer with:. Apr 6, 2016 · LIBUSB Asynchronous Bulk Transfer Timeout On Linux Ubuntu. static void Feb 4, 2024 · I have an Android Pad (Lenovo Tab M10), call libusb_bulk_transfer reception is abnormal. here's a generic example of a libusb program that you can adapt as needed. Hot Network Questions Jul 3, 2024 · libusb_bulk_transfer err: [ 0. Due to the larger bandwidth, I needed a larger total transfer size. Interesting: I also tried the same using VirtualBox. You switched accounts on another tab or window. Easy USB access for Python. 00 bDeviceClass 255 Vendor Specific Class bDeviceSubClass 255 Vendor Specific Subclass bDeviceProtocol 255 Vendor Specific Protocol bMaxPacketSize0 64 idVendor 0x0c26 Prolific Technology Inc. Feb 1, 2024 · Learn how to use libusb's synchronous (blocking) API for USB device I/O, including control, bulk and interrupt transfers. This field may be set manually or is taken as the user_data parameter of the following functions: libusb_fill_bulk_transfer() libusb_fill_bulk_stream_transfer() libusb_fill_control_transfer() libusb_fill_interrupt_transfer() Each usb device has 1 or more endpoints (addresses specified by the printdevs() function in test_libusb. Contribute to jwzl/LibUSBSimpleDemo development by creating an account on GitHub. Allocate the transfer via libusb_alloc_transfer. USB CDC examples using libusb. Search engine told me that a sender can send a USB packet less than the end-point size to signify end of sequence. Related questions. blob: 65c2d6a95b12e9b5cc4b058313b01d1fd267edfe [] [] [] [] LIBUSB Asynchronous Bulk Transfer Timeout On Linux Ubuntu. 5MB/S, but actual speed only about 59. I have a monitoring device which i works perfectly wi Ok, so I figured out the issue. Return to 1. I want to send file data to the USB printer from Linux. Why this is happening? Jun 17, 2019 · Dear: I use libusb transfer some datas, but on some PC(ubuntu 14, linux 3. I trimmed down the GenericUSB example to test the maximum transfer rate of such a device, and created a Python receiver for the host (it uses libusb as the underlying USB library). Aug 27, 2015 · data = (unsigned int *)malloc(size); r = libusb_bulk_transfer(dev, LIBUSB_ENDPOINT_IN | 0x83, usb_data //< ,sizeof(data), &transfered, 0) You probably wanted to use "data" as receiving buffer in the libusb_bulk_transfer() call, but you actually used usb_data which is only 4 bytes long. 早睡早起身体好121: 我当时解决了，我好像是端点没初始化好，他有输入和输出端点号. I can successfully detect and connect to the device but unable to read from the device. #include <iost Feb 6, 2012 · The current strategy is to use JSON delimited by newlines sent via a bulk transfer endpoint. Asking for help, clarification, or responding to other answers. Aug 29, 2019 · I have been trying to intersect usb input with libusb. int libusb_bulk_transfer (struct libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *data, int length, int *transferred, unsigned int timeout) Perform a USB bulk transfer. 0 with LP This example only works with custom usb hardware. libusb connects to device fine, interrupt transfer results in LIBUSB_ERROR_IO. The communication over virtual COM works because it the virtual COM is like a tunnel, but this tunnel was also initated and is (logically) kept alive Dec 4, 2023 · Hey I'm trying to communicate with a sick lidar sensor via usb on Ubuntu 22. But after the first successful libusb_bulk_transfer() write, my program just hangs and does not perform a libusb_bulk_transfer() read. libusb之libusb_bulk_transfer之完整实例. do{status = libusb_bulk_transfer(pDevItr->pHandle, //handle to the device dataEndPointAddr, //Endpoint for data transfer pDataBuffer, //Buffer for data dataLength, //actual length of data &sizeTransferred, //actual size of data transferred USB_TIMEOUT_MS); //Timeout Feb 1, 2024 · Bulk/interrupt transfer overflows. libusb之libusb_bulk_transfer之完整实例 Jul 23, 2019 · When I use "libusb_fill_bulk_transfer" to transfer data asynchronously, the read data will be lost, and every time the cache set in "libusb_fill_bulk_transfer" is full, it will enter the callback function. Mar 9, 2019 · I created a "driver" for a device in Windows using Python (PyUSB and libusb-win32). Nov 25, 2014 · I think my system cannot find this package, it report :(find_package): Could not find a configuration file for package libusb-1. Apr 27, 2016 · I'm really confused to get a firmware form my smart card reader. But I didn't find reference how to use the bulk stream api's. Sep 3, 2018 · ret = libusb_bulk_transfer(handle, 129, data, 512, &actual_length, 0); But the final ret = -1, could any one figure out what is wrong with my code? Apr 8, 2015 · I am using libusb-1. This is my program in QT to read my smart card reader firmware. I'm not sure how, or if it's even possible to determine this from the output of lsusb, but I had a bit of scripting that I had used for a different device written against PyUSB, so I had a poke around with that, and it told me: libusb_bulk_transferの引数endpointにて ビット7: 方向 (0 = OUTエンドポイント、1 = INエンドポイント) ビット6〜4: 予約、常に0 ビット3〜0: エンドポイント番号 を設定しますが 使用可能なエンドポイント番号を確認する方法はありますでしょうか Jun 15, 2015 · I am trying to transfer the file via libusb to the USB device (pendrive). Under normal operation I'm continuously reading 256 bytes from the device using libusb_bulk_transfer. android / platform / external / libusb / refs/heads/main / . 27. 10) test laptop, a sequence of bulk writes of length 512 bytes each times out after the second 512 byte bulk transfer. com> Date: 2020/1/22 03:01:04 To: "libusb/libusb"<libusb@noreply. Currently I'm able to open and claim the port and to send data. May 5, 2022 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand windows10 libusb_bulk_transfer failed return -5 #643. So for example if I open a connection to the device using libusb/c++ and call this: libusb_bulk_transfer(nucleo, (129), data, 2, &actual, 0); nothing happens on the device. 027190 Dec 12, 2014 · my knowledge regarding the ins and outs of usb is a little lacking, but i have got the teensy to spit out a 64 byte packet repeatedly (had to write a bit of arduino) which i have managed to receive on an android app i have developed, so the proof of concept is good. 027185] [00002baa] libusb: debug [libusb_get_device_descriptor] [ 0. The issue can also be reproduced using LPC-Link-2 dev board in the following scenario: MCUXpresso IDE v11. / examples / xusb. Jan 23, 2021 · When I use libusb1. 0 on linux with the mass storage device kingston datatrveler2. /libusb 5. 4758 Jan 9, 2014 · I have a USB printer device. Also, issues like these usually arise from the device, and commonly require from you a better understanding of the protocol and requirements in use by the device. I tested libusb version 1. It is locked. This time invoking libusb_clear_halt function can again to write. Here is the detail: devh - initial somewhere mReadEndpoint - initial somewhere as read end point int readAmt=8; unsigned char mReadBuffer[readAmt]; int timeoutMillis=50; libusb_bulk_transfer(devh, mReadEndpoint, mReadBuffer, readAmt, &numBytesRead, timeoutMillis); It works for reading. Just that HID device is using Control Transfer and Interrupt Transfer and not Bulk Transfer. Provide details and share your research! But avoid …. exe, then send data by this to stm32. com>; Subject: Re: [libusb/libusb] libusb_bulk_transfer err ( return -5) on win7_64 () I think the only reason you would get this is if the endpoint specified for the transfer doesn't Nov 21, 2012 · I am using libusb to interact with pen drive. This request is now in a pending state: USBD_STATUS_PENDING. The benchmarking code is available at GitHub. Submission. If there is a way to transfer the file then can you please suggest me. Video can be captured normally in the libuvccamera program, so I think the hardware should be able to be Oct 27, 2023 · And libusb_bulk_transfer likely suffers from the same issue. Closed zdphpn opened this issue Oct 29, 2019 · 1 comment Closed windows10 libusb_bulk_transfer failed return -5 Mar 9, 2021 · I am attempting to get a USB to DMX controller working with the following code. We can get up to 164 000 May 24, 2021 · 22 libusb_bulk_transfer int LIBUSB_CALL libusb_bulk_transfer( libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *data, int length, int *actual_length, unsigned int timeout); 函数功能：执行USB批量传输。 Recently I was developing a custom USB receiver program running on Linux. Aug 11, 2021 · I use libusb_bulk_transfer in Visual studio2019, and compile the project to an test. 1. 0 By using 'lsusb -v' I found that EP_OUT address is 0x02 and EP_IN address is 0x81. Dec 3, 2012 · libusb_fill_bulk_transfer (struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *buffer, int length, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout) Helper function to populate the required libusb_transfer fields for a bulk transfer. 15 LibUsb claim interface access denied Java. Sep 12, 2017 · I am using libusb on Ubuntu and am attempting to send 4 bytes of data via an asynchronous bulk transfer. h> #include <stdlib. I am trying to retrieve such data with libusb synchronous bulk transfer. \param transfer the transfer to populate \param dev_handle handle of the device that will handle the transfer \param endpoint address of the endpoint where this transfer will be sent \param buffer data buffer \param length length of data buffer \param callback callback function to be invoked on transfer Jul 25, 2017 · The functions that are being used to set up the transfer (in this order) are as follows: libusb_alloc_transfer() libusb_fill_bulk_transfer() libusb_submit_transfer() libusb_submit_transfer returns a successful result so I would expect to see receive a callback even if it returns an error, but none is received. 0-config. 1. 0_DIR to the directory containing a CMake configuration file for libusb-1. This code example shows how to write to a bulk pipe. It works the first time, but the second time it returns -1 code. While this software works seamlessly on multiple PCs under Windows, using my Linux (Kubuntu 18. 815683] [00004fe3] libusb: debug [usbi_handle_transfer_completion] transfer 0x7f36f803ffa8 has callback 0x50af60 [149. Sep 18, 2017 · #はじめにこれは自分が調べる過程のメモである。誤りや追加情報があればコメントにて指摘していただけると助かる。アプリケーションから、ドライバを書かず、ベンダークラスのUSBデバイスを扱おうとした… Feb 1, 2024 · Useful for associating specific data to a transfer that can be accessed from within the callback function. At that time, when I Jan 20, 2020 · ---Original--- From: "Chris Dickens"<notifications@github. Protocols of interaction with usb devices are quite specific. cmake libusb-1. Is this normal, pseudocode: boo Sep 25, 2018 · I am using libusb_bulk_transfer function. You signed out in another tab or window. sourceforge. I am keen to know that whether it is Aug 23, 2017 · libusb_fill_bulk_transfer: static inline void libusb_fill_bulk_transfer( struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *buffer, int length, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout) { /* NOTE: Only relevant code is pasted here. 24 to read and write with the mouse, I always return - 1. bulk transfer. This parameter is required in the libusb_bulk_transfer function. I am getting timeout (libusb return value -7) always while sending. This function returns immediately but can be Dec 2, 2020 · I want to write a host applications which will use bulk streams to send and receive data. int libusb_bulk_transfer(struct libusb_device_handle *devh, unsigned char endpoint, unsigned char *data, int length, int *transferred, unsigned int timeout) Perform an USB bulk transfer. unm. When I read bulk data from bulk-in endpoint using synchronous libusb bulk API then only read 64 bytes data from it and using asynchronous libusb bulk API then only read 1536 bytes data from it with libusb handle events control API. 6 device driver. Why am I not able to perform a read? Following is a snippet of my code: Oct 23, 2018 · Libusb_control_transfer; libusb_interrupt_transfer ; Asynchronous: Libusb_fill_bulk_transfer ; Libusb_fill_control_transfer; Libusb_fill_interrupt_transfer ; I tried both async as synchronous implementations for the LibUSB library. e. cmake – Nov 23, 2021 · I am sending data over usb with libusb_bulk_transfer, with something like this: int sent = 0; int bulk_result = libusb_bulk_transfer(handle, endpoint_out->bEndpointAddress, buffer, buffer_len, &sent, 5000); and I receive those transfers on the other side in Kotlin (Android). The error message is as follows: libusb: error [hid_submit_bulk_transfer] HID transfer Sep 23, 2018 · When discovering an usb device with bulk transfer capability, and removing it very fast after it was discovered results in crash in libusb_bulk_transfer call. https://git You can either fill the required fields yourself or you can use the helper functions: libusb_fill_control_transfer(), libusb_fill_bulk_transfer() and libusb_fill_interrupt_transfer(). c. 26 and 1. Dec 28, 2015 · One question regarding libusb_bulk_transfer usage above (BULK_EP_OUT). i assume that the ST32f407 is the device and the pc ist the host so the ST32 can not initiate any USB transfer. Details: Vendor ID: 8564 and Product ID: 1000. 60MB/S. It is a Transcend JetFlash mass storage device. ydsafi jeiuqvt jykwzblpa laombsg ybrbbj qrwq crmcftd twfervy otzp svrmmisg