Question

我想询问是否有办法检测通过usb连接的交换机的状态。开关有2种状态，开启和关闭。可能是Python，在Windows上。

或者，我能否实现一个将开关视为键盘扩展的脚本。

提前谢谢！

修改

#import usb.core
#import usb.util
import usb

# find our device
#dev = usb.core.find(find_all=True)
busses = usb.busses()
# was it found?
#if dev is None:
#    raise ValueError('Device not found')


for bus in busses:
    devices = bus.devices
    for dev in devices:
        try:
            _name = usb.util.get_string(dev.dev, 19, 1)
        except:
            continue
        #dev.set_configuration()
        #cfg = dev.get_active_configuration()
        #interface_number = cfg[(0,0)].bInterfaceNumber
        #5alternate_settting = usb.control.get_interface(interface_number)
        print "Device name:",_name
        print "Device:", dev.filename
        print "  idVendor:",hex(dev.idVendor)
        print "  idProduct:",hex(dev.idProduct)
        for config in dev.configurations:
            print "  Configuration:", config.value
            print "    Total length:", config.totalLength 
            print "    selfPowered:", config.selfPowered
            print "    remoteWakeup:", config.remoteWakeup
            print "    maxPower:", config.maxPower
        print

Answer 1

你看过PyUSB了吗？有关PyUSB使用的教程，请参阅http://pyusb.sourceforge.net/docs/1.0/tutorial.html。如果您想要实现更接近硬件的东西，那么该库的源代码将对您有所帮助。

http://libhid.alioth.debian.org/看起来像是用C语言编写的另一个体面的库，带有Python绑定。

修改

为了回应您尝试过的代码，您似乎正在使用旧版PyUSB界面。如果您打印（开发），您会发现它显示为<usb.legacy.Device object at 0x1dac210>，或者您会发现您使用的是旧版本的库（<usb.Device object at 0x13e6810>）。确保您拥有1.0并确保使用较新的方法来访问设备。它将类似于<usb.core.Device object at 0x1e0c3d0>例如，usb.core.find()将为您提供确实具有set_configuration()的设备。尝试再次学习本教程。

Answer 2

好的，我现在有了解决方案，我会发布它，但我有一个问题......当我运行代码时，有时会说设备很忙，它会产生错误，当它工作时..它会等待一个中断，但是如果你移动鼠标，它会在屏幕上保持静止，但会产生一个中断。单击按钮也可以这样说，它会产生一个中断，但鼠标会保持静止并再次使用它，你需要从usb中取出它并再次放入。

import usb.core
import usb.util
#import usb

# find our device
dev = usb.core.find(find_all=True)


#the second device it finds is my mouse
device = dev[2]

#print device
#physical device call: 5
#usb HID call: 3

_name = usb.util.get_string(device, 19, 1)
print _name

#we take the first configuration of the device

device.set_configuration()
print "Config set..."

#we access the configuration we've found
cfg = device.get_active_configuration()

#we access the intherface with number 0 and alternate setting with number 0
interface_number = cfg[(0,0)].bInterfaceNumber
alternate_setting = usb.control.get_interface(device,interface_number)

#we find the alterng settings for interface_number and altering_setting
intf = usb.util.find_descriptor(cfg, bInterfaceNumber = interface_number,\   
bAlternateSetting = alternate_setting)

#Finds the first IN endpoint
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
)

#inorder for you to detect a state from the device, it has to be(for mouse, moved,    
#clicked)
#otherwise it generates error

#make use of the error, if the mouse isn't pushed, do nothing and wait, if pushed...     
#print the state
#and exit from the loop

print "Waiting for signal..."


#device.detach_kernel_driver(0)


#click of the scroll button has array('B', [4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
#0, 0]) signal

while True:
    try:
       print ep.read(16)
       print "Received!"
       break
    except:
        continue

#assert ep is not 0

#_name=device.ctrl_transfer(bmRequestType=33, bRequest=11, wValue=0x0300)
#print _name

所以我猜它首先删除鼠标的驱动程序，然后它与设备对话，然后我点击按钮产生中断，然后......我怎么说，再次使用你的驱动程序和结束程序..因为每次重新输入usb鼠标是不方便的。

使用python检测连接到USB的交换机的状态

2 个答案:

修改