boot.py

import usb_hid

# fmt: off
report_descriptor = bytes(
    [
        0x05, 0x01,        # Usage Page (Generic Desktop Ctrls)
        0x09, 0x05,        # Usage (Game Pad)
        0xA1, 0x01,        # Collection (Application)
        0x15, 0x00,        #   Logical Minimum (0)
        0x25, 0x01,        #   Logical Maximum (1)
        0x35, 0x00,        #   Physical Minimum (0)
        0x45, 0x01,        #   Physical Maximum (1)
        0x75, 0x01,        #   Report Size (1)
        0x95, 0x0E,        #   Report Count (14)
        0x05, 0x09,        #   Usage Page (Button)
        0x19, 0x01,        #   Usage Minimum (0x01)
        0x29, 0x0E,        #   Usage Maximum (0x0E)
        0x81, 0x02,        #   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
        0x95, 0x02,        #   Report Count (2)
        0x81, 0x01,        #   Input (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
        0x05, 0x01,        #   Usage Page (Generic Desktop Ctrls)
        0x25, 0x07,        #   Logical Maximum (7)
        0x46, 0x3B, 0x01,  #   Physical Maximum (315)
        0x75, 0x04,        #   Report Size (4)
        0x95, 0x01,        #   Report Count (1)
        0x65, 0x14,        #   Unit (System: English Rotation, Length: Centimeter)
        0x09, 0x39,        #   Usage (Hat switch)
        0x81, 0x42,        #   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,Null State)
        0x65, 0x00,        #   Unit (None)
        0x95, 0x01,        #   Report Count (1)
        0x81, 0x01,        #   Input (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
        0x26, 0xFF, 0x00,  #   Logical Maximum (255)
        0x46, 0xFF, 0x00,  #   Physical Maximum (255)
        0x09, 0x30,        #   Usage (X)
        0x09, 0x31,        #   Usage (Y)
        0x09, 0x32,        #   Usage (Z)
        0x09, 0x35,        #   Usage (Rz)
        0x75, 0x08,        #   Report Size (8)
        0x95, 0x04,        #   Report Count (4)
        0x81, 0x02,        #   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
        0x75, 0x08,        #   Report Size (8)
        0x95, 0x01,        #   Report Count (1)
        0x81, 0x01,        #   Input (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)
        0xC0,              # End Collection
    ]
)
# fmt: on

usb_hid.enable(
    (
        usb_hid.Device(
            report_descriptor=report_descriptor,
            usage_page=0x01,
            usage=0x05,
            report_ids=(0,),
            in_report_lengths=(8,),
            out_report_lengths=(0,),
        ),
    )
)