This is cypress sl811 driver. I think it is very useful. Thankyou.

使用cypress芯片CY7C63723开发的的鼠标固件程序，主要是针对光电鼠标开发，可以作为usb I/O设备的参考-The use of cypress chip CY7C63723 development of the mouse firmware is targeted mainly at optical mouse development, can serve as a usb I/O devices reference