import usb.core
import usb.util

find our device

dev = usb.core.find(idVendor=0x03EB, idProduct=0x2421) # 设备管理器中确认这两个参数值

was it found?

if dev is None:
raise ValueError('Device not found')

set the active configuration. With no arguments, the first

configuration will be the active one

dev.set_configuration()

get an endpoint instance

configuration = dev.get_active_configuration()

cfg_ = configuration[(0, 0)]

0x2 写入节点

outPoint = usb.util.find_descriptor(
cfg_,
# match the first OUT endpoint
custom_match=lambda e: usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_OUT)

0x81 读取节点

inPoint = usb.util.find_descriptor(
cfg_,
# match the first IN endpoint
custom_match=lambda e: usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_IN)

assert outPoint, inPoint is not None

print(dev.__str__()) #可打印设备具体信息

print(dev.langids)

print(dev.product)

print(dev.serial_number)

print(dev.manufacturer)

print(dev.address)

print(dev.bus)

print(dev.port_number)

print(dev.speed)

print(dev.bNumConfigurations)

print(dev.bDeviceClass)

msg = [1, 2, 3, 4, 5, 6] # bytes
temp0 = [0 for i in range(64 - len(msg))] # 缺少的字节

msg.extend(temp0) # 合并后64个字节[1, 2, 3, 4, 5, 6,0,0,0,0,……]

outPoint.write(msg) # 写入 注意必须满足64个字节

dev.write(0x2, msg, 0) #效果同上写入

read = inPoint.read(64) # 读取64个字节

read = dev.read(0x81, 64, 0) #效果同上读取

　异常说明：

1. 　　

   window/system32中缺少libusb-1.0.dll

2. 没有读取到内容超时

3. 写入或者读取字节数不足