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boot.py
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boot.py
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import usb_hid
import usb_midi
import usb_cdc
# We'll simulate a standard dual analog thumb-stick gamepad with 16 digital buttons
# even though we often don't need anywhere near this number of inputs
GAMEPAD_REPORT_DESCRIPTOR = bytes((
0x05, 0x01, # Usage Page (Generic Desktop Ctrls)
0x09, 0x04, # Usage (Joystick)
0xA1, 0x01, # Collection (Application)
0x85, 0x04, # Report ID (4)
0x05, 0x09, # Usage Page (Button)
0x19, 0x01, # Usage Minimum (Button 1)
0x29, 0x10, # Usage Maximum (Button 16)
0x15, 0x00, # Logical Minimum (0)
0x25, 0x01, # Logical Maximum (1)
0x75, 0x01, # Report Size (1)
0x95, 0x10, # Report Count (16)
0x81, 0x02, # Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x01, # Usage Page (Generic Desktop Ctrls)
0x16, 0x01, 0x80, # Logical Minimum (-32767)
0x26, 0xff, 0x7F, # Logical Maximum (32767)
0x09, 0x30, # Usage (X)
0x09, 0x31, # Usage (Y)
0x09, 0x32, # Usage (Z)
0x09, 0x35, # Usage (Rz)
0x75, 0x10, # Report Size (16)
0x95, 0x04, # Report Count (4)
0x81, 0x02, # Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, # End Collection
))
gamepad = usb_hid.Device(
report_descriptor=GAMEPAD_REPORT_DESCRIPTOR,
usage_page=0x01, # Generic Desktop Control
usage=0x04, # Joystick
report_ids=(4,), # Descriptor uses report ID 4.
in_report_lengths=(10,), # This gamepad sends 10 bytes in its report.
out_report_lengths=(0,), # It does not receive any reports.
)
# Disable MIDI to save on USB I/O endpoints
usb_midi.disable()
# enable the data CDC serial
usb_cdc.enable(console=True, data=True)
# Enable gamepad and consumer control (volume) HID devices
usb_hid.enable(
( gamepad, usb_hid.Device.CONSUMER_CONTROL )
)