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basic_mouse.py

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import array

import usb.core

import sys

# This is a basic Microsoft optical mouse with two buttons and a wheel that can

# also be pressed.

USB_VID = 0x045E

USB_PID = 0x0040

# This is ordered by bit position.

BUTTONS = ["left", "right", "middle"]

device = usb.core.find(idVendor=USB_VID, idProduct=USB_PID)

print(device.manufacturer, device.product)

# Test to see if the kernel is using the device and detach it.

if device.is_kernel_driver_active(0):

device.detach_kernel_driver(0)

# Boot mice have 4 byte reports

buf = array.array("b", [0] * 4)

report_count = 0

while True:

try:

count = device.read(0x81, buf)

except usb.core.USBTimeoutError:

continue

if report_count % 15 == 0:

print("x y wheel buttons")

print(buf[1], buf[2], buf[3], end=" ")

for i, button in enumerate(BUTTONS):

if buf[0] & (1 << i) != 0:

print(button, end=" ")

print()

report_count += 1