Hi there, I am having issues with a standalone atmega32u4 project i've been working on and was hoping someone would be able to help

I have designed a pcb that uses the atmega32u4 to recreate the arduino leonardo. I have been able to successfully burn the Arduino bootloader onto the chip using the pcb but when I get round to plugging it into the computer through a usb type c connector, the device shows up in device manager as 'Unknown USB device' instead of a COM port. This is my second version of the board- the first version used a usb type c breakout board and was consequently far easier to solder- the first board worked perfectly. Since then I haven't made any significant changes to the schematic besides adding the usb type C connector in the place of the type c connector breakout board.

I have soldered 4 boards now, all having the same issue, so I don't think it is my soldering incompetence causing the issue.

I have attached a png of my schematic and error message as well as my gerber files. I hope someone would be able to point out any mistakes I have made or give me some pointers as to how to fix the issue.

Many thanks

 

Seems like you have shorted the DN2 and DN1, similarly DP1 and DP2 which raises errors exactly like the descriptor read failed.