depth description of usb device library

[vbruno1]

Posted on May 25, 2016 at 18:33

Where is possible find a very detailed descrip of usb device library.

I read this

http://www.st.com/content/ccc/resource/technical/document/user_manual/cf/38/e5/b5/dd/1d/4c/09/DM00108129.pdf/files/DM00108129.pdf/jcr:content/translations/en.DM00108129.pdf

t, but I don't find details of 

various matters that define  _USBD_HandleTypeDef struct.

For example the dev_connection_status variable or the  USBD_SetupReqTypedef request struct that value can have during the run?

Thank so much.