void USBCheckCDCRequest();
This routine checks the most recently received SETUP data packet to see if the request is specific to the CDC class. If the request was a CDC specific request, this function will take care of handling the request and responding appropriately.
This function should only be called after a control transfer SETUP packet has arrived from the host.
This function does not change status or do anything if the SETUP packet did not contain a CDC class specific request.
MLA - USB Library Help Version : 2.16
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