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我正在使用Android USB Host API使用FT232发送和接收数据。我使用两个线程发送部分和阅读部分。我可以发送和接收数据，但读取的数据与数据发送的数据不相等。例如，当我发送字节[1，2，3，4，5]。读取的数据有时是字节[1,2,5]。有时可以读取5个字节，但有时会丢失一些字节。附件是我正在使用的代码。Android USB无法通过bulkTransfer读取完整数据
设置部分：
HashMap<String, UsbDevice> list = mUsbManager.getDeviceList();
Iterator<UsbDevice> iterator = list.values().iterator();
while(iterator.hasNext()) {
UsbDevice device = iterator.next();
if (device.getInterfaceCount() == 1) {
mInterface = device.getInterface(0);
for (int i = 0; i < mInterface.getEndpointCount(); i++) {
if (mInterface.getEndpoint(i).getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
if (mInterface.getEndpoint(i).getDirection() == UsbConstants.USB_DIR_IN) {
mEndpointIn = mInterface.getEndpoint(i);
} else {
mEndpointOut = mInterface.getEndpoint(i);
}
}
}
}
}
}
}
发送部分：
UsbDeviceConnection connection = mUsbManager.openDevice(device);
if (connection == null) {
Log.e(TAG, "Connection terminated");
return;
}
byte[] bytes = new byte[1, 2, 3, 4, 5];
boolean claimed = connection.claimInterface(mInterface, true);
if (claimed) {
connection.controlTransfer(0x40, 0x03, 0x0034, 0, null, 0, 0); // baud rate 57600
connection.controlTransfer(0x40, 0x04, 0x0008, 0, null, 0, 0); // 8-N-1
int sentLength = connection.bulkTransfer(mEndpointOut, bytes, bytes.length, 100);
connection.releaseInterface(mInterface);
connection.close();
}
阅读部分：
UsbDeviceConnection connection = mUsbManager.openDevice(device);
if (connection == null) {
Log.e(TAG, "Connection terminated");
return;
}
byte[] inData = new byte[64];
boolean claimed = connection.claimInterface(mInterface, true);
if (claimed) {
connection.controlTransfer(0x40, 0x03, 0x0034, 0, null, 0, 0); // baud rate 57600
connection.controlTransfer(0x40, 0x04, 0x0008, 0, null, 0, 0); // 8-N-1
int readLength = connection.bulkTransfer(mEndpointIn, inData, inData.length, 100);
connection.releaseInterface(mInterface);
connection.close();
// 'result' is the data I want, the first 2 bytes are status bytes so being removed
byte[] result = new byte[inData.length - 2];
System.arrayCopy(inData, 2, result, 0, inData.length - 2);
}