blocks|key|2040565|text|一些USB集线器能够关闭其下游设备的电源。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2040566|“可以从Ubuntu给USB集线器上的端口加电吗？”https://askubuntu.com/questions/149242/is-it-possible-to-power-up-ports-on-a-usb-hub-from-ubuntu指向了hub-ctrl.c的一些c源代码。|offset|length|2040567|请参阅：http://www.gniibe.org/development/ac-power-control-by-USB-hub/index|2040568|我在Ubuntu上用一个梦幻般的USB+LED装置进行了测试，它似乎确实关闭了电源-尽管当再次打开时，设备已经记住(!)它的LED亮/灭状态？-当我拔下并重新插入LED的USB引线时，没有出现这种情况...|2040569|看起来有人已经考虑过为Windows编译这个程序，但是我找不到结果，对不起。|2040570|entityMap|0|LINK|mutability|MUTABLE|url|https://askubuntu.com/questions/149242/is-it-possible-to-power-up-ports-on-a-usb-hub-from-ubuntu|1|http://www.gniibe.org/development/ac-power-control-by-USB-hub/index^0|0|Q|2O|0|0|4|1V|1|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|F|3|G|5|6|7|10|8|@]|9|@$D|11|E|12|1|13]]|A|$]]|$1|H|3|I|5|6|7|14|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|15|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]|T|$5|O|P|Q|A|$R|U]]]]

Some USB hubs have the ability to turn power off to its downstream devices.

"Is it possible to power up ports on a USB hub from Ubuntu?"
<a href="https://askubuntu.com/questions/149242/is-it-possible-to-power-up-ports-on-a-usb-hub-from-ubuntu">https://askubuntu.com/questions/149242/is-it-possible-to-power-up-ports-on-a-usb-hub-from-ubuntu</a>
Which points to some c source for hub-ctrl.c

See: <a href="http://www.gniibe.org/development/ac-power-control-by-USB-hub/index" rel="nofollow noreferrer">http://www.gniibe.org/development/ac-power-control-by-USB-hub/index</a>

I tested this on Ubuntu with a Dream-Cheeky USB LED unit, and it did seem to turn the power off - although when turned on again, the device had remembered (!) its LED on/off state ??? - This did not happen when I unplugged and repluged the USB lead to the LED...

It looks like someone has looked at compiling this for Windows, but I could not find the result, sorry.

blocks|key|1637317|text|由于它是用于开发/测试而不是生产，我建议将solid-state_relay作为第二个设备的一部分，并使用它来重新打开USB连接的电源。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1637318|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/Solid-state_relay^0|L|H|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Since it's for development/test instead of production, I'd recommend having a <a href="https://en.wikipedia.org/wiki/Solid-state_relay" rel="nofollow noreferrer">solid-state_relay</a> as part of a second device and using that to cycle the power on the USB connection.

blocks|key|4150542|text|您可以使用硬件继电器并通过软件控制它：http://pintant.cat/2012/05/12/power-off-usb-device/+(当然，将使用两个USB端口:-)一个用于设备，一个用于继电器)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4150543|entityMap|0|LINK|mutability|MUTABLE|url|http://pintant.cat/2012/05/12/power-off-usb-device/^0|J|1F|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You could do with a hardware relay and controlling it via software: <a href="http://pintant.cat/2012/05/12/power-off-usb-device/" rel="nofollow">http://pintant.cat/2012/05/12/power-off-usb-device/</a> (of course, will use 2 USB ports :-) one for the device, one for the relay).

blocks|key|1637361|text|如果你购买this+external+USB+hub，在Windows上有一个简单的解决方案。它有一个未公开的功能，每当在Windows设备管理器中“启用”集线器时，该功能就会关闭并重新启动所有连接的USB设备。您可以手动执行此操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1637362|USB集线器运行"Device+Manager"|1637363|Expand“通用串行总线controllers"|unordered-list-item|1637364|
|1637365|Open属性相应的"Generic+|1637366|”|ordered-list-item|1637367|选择"Driver“选项卡|1637368|单击"Disable”按钮|1637369|单击"Enable“按钮。集线器将暂时禁用所有4个USB端口的电源输出，然后再次启用。|1637370|1637371|1637372|您也可以从任何以管理员权限运行的Windows应用程序中以编程方式执行此操作。这是an+example+in+C#。|1637373|我已经成功地使用此技术关闭并重新打开被“锁定”的USB设备的电源。它肯定胜过物理拔出设备，特别是在远程或无人值守的PC上。|1637374|entityMap|0|LINK|mutability|MUTABLE|url|https://amzn.com/B00007AKAZ|1|https://github.com/idmadj/handsoff/blob/master/DisableHardware.cs^0|5|L|0|0|0|0|0|0|0|0|0|0|0|0|15|G|1|0|0^^$0|@$1|2|3|4|5|6|7|1B|8|@]|9|@$A|1C|B|1D|1|1E]]|C|$]]|$1|D|3|E|5|6|7|1F|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|1G|8|@]|9|@]|C|$]]|$1|I|3|J|5|6|7|1H|8|@]|9|@]|C|$]]|$1|K|3|L|5|H|7|1I|8|@]|9|@]|C|$]]|$1|M|3|N|5|O|7|1J|8|@]|9|@]|C|$]]|$1|P|3|Q|5|O|7|1K|8|@]|9|@]|C|$]]|$1|R|3|S|5|O|7|1L|8|@]|9|@]|C|$]]|$1|T|3|U|5|O|7|1M|8|@]|9|@]|C|$]]|$1|V|3|-4|5|6|7|1N|8|@]|9|@]|C|$]]|$1|W|3|-4|5|6|7|1O|8|@]|9|@]|C|$]]|$1|X|3|Y|5|6|7|1P|8|@]|9|@$A|1Q|B|1R|1|1S]]|C|$]]|$1|Z|3|10|5|6|7|1T|8|@]|9|@]|C|$]]|$1|11|3|-4|5|6|7|1U|8|@]|9|@]|C|$]]]|12|$13|$5|14|15|16|C|$17|18]]|19|$5|14|15|16|C|$17|1A]]]]

There is a simple solution to this on Windows if you buy <a href="https://amzn.com/B00007AKAZ" rel="nofollow">this external USB hub</a>. It has an undocumented feature that cycles power to all connected USB devices whenever the hub is "enabled" in Windows Device Manager. You can do this manually:

<ol>
<li>Run "Device Manager"</li>
<li>Expand "Universal Serial Bus controllers"</li>
<li>Open Properties for the appropriate "Generic USB Hub"</li>
<li>Select the "Driver" tab</li>
<li>Click the "Disable" button</li>
<li>Click the "Enable" button. The hub will briefly disable power output to all 4 of its USB ports, and then enable it again.</li>
</ol>

You can also do this programmatically from any Windows application that is running with administrator priveledges. Here is <a href="https://github.com/idmadj/handsoff/blob/master/DisableHardware.cs" rel="nofollow">an example in C#</a>.

I have successfully used this technique to cycle power to USB devices that were "locked up". It sure beats physically unplugging devices, especially on remote or unmanned PCs.

blocks|key|1640385|text|不幸的是，这在现货PC上是不可能的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1640386|USB主机芯片组没有完全断电的功能。您可以在USB+2.0或3.0中使用一些信号来要求设备进入睡眠状态，但即使PC关闭，端口也会提供电源。(这是为了让iPods等设备在需要的时候仍然可以充电。)|1640387|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Unfortunately, it's not possible on stock PCs.

USB host chipsets do not have the capability to fully power-down. There is some signaling that you can do in USB 2.0 or 3.0 to ask the device to go into a sleep-state, but the port will provide power even when the PC is turned off. (That's so devices like iPods and whatnot can still charge if needed.)

I would like to power cycle an USB device through software on Windows.

I am doing development on a small USB power microcontroller. This chip will revert to native behavior on a power cycle and allow a code download. Since my code will crash the device when things go wrong -- making it ignore all USB commands -- I have to physically unplug the device from the system. 

I want to do development remotely, and not have to be physically present. 

So far I have tried using "devcon" to disable portions of the USB stack. While this takes the hubs into D3 (should be powered off!), there is still power being supplied to the device. 

Are there any preexisting solutions or SetupAPI tricks that might help?

Power off an USB device in software on Windows

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想通过Windows上的软件重启USB设备。我正在做一个小型USB电源微控制器的开发。此芯片将在电源循环时恢复为本机行为，并允许代码下载。由于我的代码将在出现问题时使设备崩溃--使其忽略所有USB命令--因此我必须从系统中物理拔出设备。我想远程进行开发，而不是亲临现场。到目前为止，我已经尝试使用"devcon“来禁用部分USB堆栈。虽然这会使集线器进入D3 (应该关闭电源！)，但仍有电源供应给设

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