I am using libusbdotnet in a C# application to communicate with a usb device. How do I give vendor specific commands like SET DATE TIME using libusbdotnet?
How to send vendor specific commands like "SET DATE TIME" to a usb device
2k Views Asked by user1985 At
1
There are 1 best solutions below
Related Questions in C#
- MySQL Select Rank
- When dealing with databases, does adding a different table when we can use a simple hash a good thing?
- Push mysql database script to server using git
- Why does mysql stop using indexes when date ranges are added to the query?
- Google Maps API Re-size
- store numpy array in mysql
- Whats wrong with this query? Using ands
- MySQL-Auto increment
- show duplicate values subquery mysql
- Java Web Application Query Is Not Working
Related Questions in USB
- MySQL Select Rank
- When dealing with databases, does adding a different table when we can use a simple hash a good thing?
- Push mysql database script to server using git
- Why does mysql stop using indexes when date ranges are added to the query?
- Google Maps API Re-size
- store numpy array in mysql
- Whats wrong with this query? Using ands
- MySQL-Auto increment
- show duplicate values subquery mysql
- Java Web Application Query Is Not Working
Related Questions in LIBUSBDOTNET
- MySQL Select Rank
- When dealing with databases, does adding a different table when we can use a simple hash a good thing?
- Push mysql database script to server using git
- Why does mysql stop using indexes when date ranges are added to the query?
- Google Maps API Re-size
- store numpy array in mysql
- Whats wrong with this query? Using ands
- MySQL-Auto increment
- show duplicate values subquery mysql
- Java Web Application Query Is Not Working
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
In the sense of the USB protocol vendor specific requests are common requests (see http://www.cypress.com/file/202971/download - Create your own USB vendor commands using FX2LP) and you propably would use a control transfer for this if it is sufficient to sent the request to the control endpoint EP0 of the device. You have to have deep knowledge of the internal structure of your device to be make this work, you have to know to which endpoint in the device structure the request has to be issued and what values you have to place in the fields of the request packet: address, bmRequestType, bRequest, (endpoint number),... If the vendor specific request can not be sent to the control endpoint you can not use a control transfer (http://www.beyondlogic.org/usbnutshell/usb4.shtml#Control).
General information on USB request are in http://www.beyondlogic.org/usbnutshell/usb6.shtml informations on vendor specific requests are for example in http://www.cypress.com/file/202971/download - Create your own USB vendor commands using FX2LP
The libusbdotnet method for a control transfer is
public virtual bool ControlTransfer( ref UsbSetupPacket setupPacket, Object buffer, int bufferLength, out int lengthTransferred )you have to build
setupPacketon your own, see http://www.beyondlogic.org/usbnutshell/usb6.shtmlhttp://libusbdotnet.sourceforge.net/V2/html/65fd96b8-6c8f-f877-22a5-15074d922485.htm
you can use libusb to perform a control transfers like this:
in Sync I/O
int libusb_control_transfer (libusb_device_handle *dev_handle, uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, unsigned char *data, uint16_t wLength, unsigned int timeout)this can not be addressed to a specific endpoint, goes to EP0in Async I/O
libusb_control_setup (libusb_device_handle *dev_handle, uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, unsigned char *data, uint16_t wLength, unsigned int timeout)can not be addressed to specific endpoints, goes to EP0, and has no data section meaning it builds only the setup packets in the control transfer (control transfer consists of setup stage, data stage, status stage) (http://libusb.org/static/api-1.0/structlibusb__control__setup.html)If you have to send the request to a specific endpoint (not the control endpoint) you can use bulk transfer or interrupt_transfer
In http://libusb.sourceforge.net/api-1.0/group__syncio.html in http://libusb.org/static/api-1.0/group__misc.html are listed the standard USB requests that are available in libusb