How to detect PC connect to my USB Device

I configure usb as mass storage device. I don't know how I can detect PC connection to my usb port.
How to detect PC connect to my USB Device

I configure usb as mass storage device. I don't know how I can detect PC connection to my usb port.
How do I detect a USB connection using information in Cortex M7 registers

I'm moving an application that runs on a K20 processor (Teensy 3.2) to a Cortex M7 (Teensy 4.0). On the K20 I was able to use the LINESTATESTABLE field in the OTGSTAT register to reliably tell via software...
USB Host detects usb device type

How we can detect which USB device type(HID,MSC etc) connected to usb host port? and appropriate routine for that type of device.
USB Host detects usb device type

How we can detect which USB device type(HID,MSC etc) connected to usb host port? and appropriate routine for that type of device.