Libusb for usb device driver development

Good day,

I am a newbie with developing USB driver using libusb APIs. I try to write a usb driver to read data from a sensor device (which has a usb port to connect with the PC). Following the routines, I can find the device and set the interface, however, when I call usb_bulk_read to read data from the device, I got the following error: ==================== usb error: error reading from bulk endpoint 0x83: no such file or directory. =====================

Does anyone have experience with this kind of problem? Very appreciate for your help.

Thanks in advancd,


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