androidusbrequestwait

requestWait. If the request failed the buffer will be unchanged; if the request succeeded the position of the buffer is incremented by the number of bytes sent/ ...

2016年3月9日 — 4. 调用usbDeviceConection的 requestWait() 等待request异步请求生效；注意requestWait()对所有endpoint提交的request都可能生效。很重要的一点是要判断 ...

... requestWait; requestWait; setConfiguration; setInterface. Protected methods ... usb.UsbDeviceConnection. This class is used for sending and receiving data and ...

Quickly bring your app to life with less code, using a modern declarative approach to UI, and the simplicity of Kotlin. ... Start by creating your first app. Go ...

2016年12月29日 — Due to Android bug 39522, it is not possible to use UsbDeviceConnection.requestWait() with a timeout. At least the CdcAcmSerialDriver uses ...

UsbDeviceConnection.requestWait() will block forever if the USB device doesn't sent out any data. There is no clean way to interrupt it.

包含要傳送之位元組的緩衝區，或要填滿的緩衝區。 緩衝區的狀態是未定義的，直到要求傳回為止 UsbDeviceConnection#requestWait 。 如果要求失敗，緩衝區將會保持不變;如果 ...

當有多個端點正在使用時， android.hardware.usb.UsbRequest#getEndpoint 而且 android.hardware.usb.UsbRequest#getClientData 有助於判斷如何處理此函式的結果。

2012年10月8日 — Your request queue is on a different endpoint than what your USB device is actually sending data on. Double check that you are listening on the ...

2022年7月7日 — Anybody have any ideas as to why requestWait() or queue() might stop receiving information (payloads) from an external device (aggboard) ...