Python USB通讯

1.下载libusb：

地址：Releases · libusb/libusb · GitHub

下载7z压缩包文件到本地：

解压后将32位版本的dll文件拷贝到C:\Windows\System32，64位的dll文件拷贝到C:\Windows\SysWOW64

2.安装python的usb模块

pip install pyusb

校验安装：

>>> import usb.core
>>> dev = usb.core.find(all=True)

将所有USB设备打印出来。

3.获取USB设备的读写endpoint

device.set_configuration()
cfg = device.get_active_configuration()
intf = cfg[(0, 0)]
usb.util.claim_interface(device, intf)
# 获取写endpoint
write_ep = usb.util.find_descriptor(
intf,
# match the first OUT endpoint
custom_match=
lambda e:
usb.util.endpoint_direction(e.bEndpointAddress) ==
usb.util.ENDPOINT_OUT
)
# 获取读endpoint
read_ep = usb.util.find_descriptor(
intf,
# match the first IN endpoint
custom_match=
lambda e:
usb.util.endpoint_direction(e.bEndpointAddress) ==
usb.util.ENDPOINT_IN
)

5.通过endpoint读写数据

w_len = write_ep.write(data, timeout)

data = read_ep.read(len, timeout=timeout)