如何使用pyusb与该设备通信? [英] How can I comunicate with this device using pyusb?
问题描述
我有一个Netware uniFlow设备.当我将其插入时,它会显示在dmesg中:
I have a Netware uniFlow device. When I plug it in it shows up in dmesg:
[ 2962.369905] usb 2-1.4: new full-speed USB device number 11 using ehci-pci
[ 2962.463867] usb 2-1.4: New USB device found, idVendor=171b, idProduct=2001
[ 2962.463871] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2962.463874] usb 2-1.4: Product: USB Keyboard
[ 2962.463876] usb 2-1.4: Manufacturer: RFIDeas
[ 2962.465361] input: RFIDeas USB Keyboard as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4:1.0/0003:171B:2001.0008/input/input17
[ 2962.465481] hid-generic 0003:171B:2001.0008: input,hidraw3: USB HID v1.10 Keyboard [RFIDeas USB Keyboard] on usb-0000:00:1d.0-1.4/input0
使用lsusb
命令,它也会出现在列出的USB设备中:
It also appears in the listed USB devices, with the lsusb
command:
Bus 002 Device 011: ID 171b:2001
如果我在这里错了,请更正我,但是我认为我需要取消绑定设备,以便可以使用pyusb与设备进行通信.当我尝试运行代码时,出现资源繁忙错误.
Correct me if I am wrong here, but I think I need to unbind the device, so that I may use pyusb to to communicate with the device. When I try to run my code, I get resource busy errors.
因此,我将CD压缩到/sys/bus/usb/devices/usb2/2-1/2-1.4(取自dmesg),然后尝试使用取消绑定该设备
So then I cd'd down to /sys/bus/usb/devices/usb2/2-1/2-1.4 (taken form dmesg) and then tried to unbind the device using
sudo sh -c echo "2-1.4:1.0 > unbind"
但是我被拒绝了.因此,我以root用户身份登录,但是仍然遭到拒绝.
But I got permission denied. So I logged in as root, but I still got permission denied.
这是我试图与设备进行通信的源代码:
Here is my source code that I am trying to use to communicate with the device:
#!/usr/bin/env python
import usb.core
import usb.util
import sys
# Find our device from lsusb
# Vendor : Product 171b:2001
dev = usb.core.find(idVendor=0x171b, idProduct=0x2001)
# 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()
# Let's fuzz around!
# Let's start by reading one byte from the device using different requests
# bRequest is a byte so there are 255 different values
for bRequest in range(255):
try:
ret = dev.ctrl_transfer(0xC0, bRequest, 0, 0, 1)
print "bRequest ",bRequest
print ret
except:
# Failed to get data for this request
pass
这是我尝试运行程序时遇到的错误:
And here are the errors, I get when I try to run the program:
$ sudo python usbhax.py
Traceback (most recent call last):
File "usbhax.py", line 16, in <module>
dev.set_configuration()
File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 799, in set_configuration
self._ctx.managed_set_configuration(self, configuration)
File "/usr/local/lib/python2.7/dist-packages/usb/core.py", line 128, in managed_set_configuration
self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 730, in set_configuration
_check(self.lib.libusb_set_configuration(dev_handle.handle, config_value))
File "/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 552, in _check
raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 16] Resource busy
我做错了什么?我该怎么做才能与此设备通信?
What am I doing wrong? What can I do to communicate with this device?
是的,我已经安装了libusb和pyusb.我正在Ubuntu环境中工作.
Yes, I have libusb installed, and pyusb. I am working from a Ubuntu environment.
推荐答案
以我的经验,您必须为udev系统的设备设置规则文件
In my experience, you have to have set up a rules file for the device for the udev system
-
类似的东西:
Something along the lines of:
ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="171b", ATTRS{idProduct}=="2001", MODE="660", GROUP="plugdev"
位于名为/lib/udev/rules.d/50-YourSoftwareName.rules
的文件中(例如,在man udev
中进行挖掘以获取文件命名规则,但50-usbhax.rules
应该这样做)
in a file called /lib/udev/rules.d/50-YourSoftwareName.rules
(for example, dig around in man udev
for file naming rules but 50-usbhax.rules
should do)
将您的用户名添加到plugdev
组
adduser username plugdev
重新加载规则
Reload rules
sudo udevadm control --reload
(即负负重新加载)
sudo udevadm trigger
sudo udevadm control --reload
(that is minus minus reload)
sudo udevadm trigger
拔出并重新插入设备,或重新启动计算机,看看它是否可以工作.
Unplug and replug the device or reboot your machine and see if it works.
注意:某些系统使用组input
而不是plugdev
,因此请进行相应编辑.
要检查系统使用的内容,请查看/dev/usb
或/dev/input
NOTE: Some systems use the group input
rather than plugdev
, so edit the above accordingly.
To check what your system uses have a look at the group
name for the relevant entries in /dev/usb
or /dev/input
这篇关于如何使用pyusb与该设备通信?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!