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Interface in libusb: intusb_control_msg parameter transfer problem

Source: Internet
Author: User
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Interface in libusb: intusb_control_msg parameter transfer problem-Linux general technology-Linux programming and kernel information. The following is a detailed description. For interfaces in libusb: int usb_control_msg (struct usb_device_handle * dev, _ u8 request, _ u8 requesttype, _ b2value, _ b2index, void * data, _ size, int timeout); want to know how to fill and read the input and output parameters. For example, if I want to send a voice control command, I define the 0xA1 sound sending command. How do I transmit the sound frequency and duration parameters to the device through this interface. I am very grateful to anyone who is a beginner. Thank you for choosing online.

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parameter file in informatica interface in libusb example libusb linux interface class in php what interface in php iterable interface in java
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