STM UART over USB

Question

I have some device connected via USB to Raspberry Pi 3 with Raspbian installed.
I have protocol specification, it is simple serial protocol with hex commands and data.
However I have no idea, where to find drivers... In lsusb I see:

Bus 001 Device 006: ID 0483:5740 STMicroelectronics STM32F407

But here is nothing about UART<->USB drivers...

pi@raspberrypi:~ $ ls -la /dev/ | grep ttyS have no results also.

Answer 1

What about ls -l /dev/ttyACM* ? Those are the nodes created for standard USB CDC ACM devices.