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Function USBMTPGetDevProperty

USBMTPGetDevProperty retrieves a Property of a connected USB MTP device:

int USBMTPGetDevProperty(int Dev, WORD PropertyCode, void * Property, UINT Len);

Parameters

Dev

Index of the MTP device. This value should be in range 0 .. RTUSBMTPConfig.MaxDevices - 1.

PropertyCode

The code value of the requested property.

Property

Pointer to a buffer to receive the property.

Len

Number of available bytes in the buffer pointed to by parameter Property.

return value

If the function succeeds, the number of bytes of the requested property is returned. Only if this value is <= parameter Len, the property is copied to *Property. On error, a negative error code is returned.

Details about all available MTP device properties are listed in Appendix C of the USB Media Transfer Protocol Specification, Revision 1.1. For each property, the PropertyCode and data type is listed. Please note that the returned device property is always returned in little endian format.

Functions MTP and Name of demo program MTPDemo show how this function is used.

Function USBMTPGetDevInfo

Function USBMTPSetDevProperty