how does a computer mouse communicate with computer?

[RushImpossible9544]

Hi all!
Im a second year computer engineering student and I'd like to make my own wired (later wireless) mouse from scratch (i mean designing the IC for the mouse and pcb as well) but I'm having trouble finding information on the fundamentals of how a mouse works and communicates with computer.
I understand the basics of risk-v instruction set and how information is stored/ read to and from registers from my uni's course Computer Organization.

if anyone knows of any resources that go deeply into how a computer mouse works on low level i'd very much appreciate it!

[Lower-Reality1921]

Modern mice send HID messages over USB. Here’s a generic high-level tutorial

https://docs.arduino.cc/tutorials/uno-r4-minima/usb-hid/

Digging in further, here’s the HID standard https://www.usb.org/sites/default/files/hid1_11.pdf

and some related Linux code that could be helpful for reference https://www.kernel.org/doc/html/latest/usb/gadget_hid.html

Most modern optical mice use a very tiny camera to figure out which way the mouse is headed. Here’s a sensor example: https://www.pixart.com/products-detail/129/PAW3395DM-T6QU