请教一下HID设备，怎么在metro app和desktop app下同步？

Question

我在desktop app和metro app 都有程序会访问同一个HID设备，在metro app使用HID设备时，有时候，desktop也周期性的给HID设备发消息，导致metro app得到的消息异常。请问怎么能让StreamSocketListenerdesktop app和metro app访问同一个设备的时候同步、类似的锁的也可以？

Answer 1

你好，

不是很明白你的意思，你是说想在Store App占用HID设备的时候，Desktop应用来接管HID么？

--James

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Answer 2

你好，

不是很明白你的意思，你是说想在Store App占用HID设备的时候，Desktop应用来接管HID么？

--James

---

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在Store App给HID发消息，并等待HID设备回消息的时候，Desktop App也会给HID设备发消息。

Answer 3

你好，

Windows Store App中队HID信息的处理已经有类似让步的举措，参考一下文档： Human Interface Devices (HID)

里面提到为了避免和Windows API或者OS冲突，Windows Store App已经屏蔽了顶层usage page的使用，所以你Desktop Application使用的UsagePage是否包含在内？

The Windows.Devices.HumanInterfaceDevice API supports most HID devices. However, it blocks the top-level application collection represented by the following usage pages, to prevent conflict with other Windows APIs and OS behavior:

• HID_USAGE_PAGE_UNDEFINED
• HID_USAGE_PAGE_GENERIC
• HID_USAGE_GENERIC_KEYBOARD
• HID_USAGE_GENERIC_KEYPAD
• HID_USAGE_GENERIC_SYSTEM_CTL
• HID_USAGE_PAGE_KEYBOARD
• HID_USAGE_PAGE_CONSUMER
• HID_USAGE_PAGE_DIGITIZER
• HID_USAGE_PAGE_SENSOR
• HID_USAGE_PAGE_BARCODE_SCANNER
• HID_USAGE_PAGE_WEIGHING_DEVICE
• HID_USAGE_PAGE_MAGNETIC_STRIPE_READER
• HID_USAGE_PAGE_TELEPHONY

--James

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Answer 4

 这个usagepage是我们自定义的，不在上面的列表里面。还有其他的办法吗？

Answer 5

你好，这个我帮你去问一下吧，我也不是很清楚，不过我认为可能没办法，毕竟是系统封装的功能。

--James

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Answer 6

我在desktop app和metro app 都有程序会访问同一个HID设备，在metro app使用HID设备时，有时候，desktop也周期性的给HID设备发消息，导致metro app得到的消息异常。请问怎么能让StreamSocketListenerdesktop app和metro app访问同一个设备的时候同步、类似的锁的也可以？

Answer 7

你好，

我这里问到了点东西，看看对你是否有帮助。

首先Windows Store App里面的 API： Windows.Devices.HumanInterfaceDevice 仅仅支持不在列表中的UsagePage，这里你的应该是不在列表中。

其次，这些设备必须不能是PC自带的，需要是额外的那种设备才行。

同时，你可以测试一下，先从Windows Store App中运行不同的UsagePage然后再开启Desktop程序对它的访问么？

--James

---

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