java - 使用 usb4java 向 USB 设备发送消息 - 输入/输出错误

Question

我正在尝试使用以下代码向我的 USB 设备(Silicon Labs USB-UART Bridge)发送消息:

public void sendMessage(UsbInterface iface, String message,
        int i){

    UsbPipe pipe = null;

    try {
        iface.claim(new UsbInterfacePolicy() {
            @Override
            public boolean forceClaim(UsbInterface usbInterface) {
                return true;
            }
        });

        UsbEndpoint endpoint = (UsbEndpoint) iface.getUsbEndpoint((byte) i);
        pipe = endpoint.getUsbPipe();
        pipe.open();

        int sent = pipe.syncSubmit(message.getBytes());

        System.out.println(sent + " bytes sent");
        pipe.close();

    } catch (Exception ex) {
        ex.printStackTrace();
    } finally {
        try {
            iface.release();
        } catch (UsbClaimException e) {
            e.printStackTrace();
        } catch (UsbNotActiveException e) {
            e.printStackTrace();
        } catch (UsbDisconnectedException e) {
            e.printStackTrace();
        } catch (UsbException e) {
            e.printStackTrace();
        }
    }
}//sendMessage

当我执行它时:

public static void main(final String[] args) throws UsbException {

    Usb4JavaHigh usb4java = new Usb4JavaHigh();
    UsbDevice usbDevice = usb4java.findDevice((short) (0x10C4), (short) (0xEA60));

    usb4java.sendMessage(usb4java.getDeviceInterface(usbDevice, 0), "01FF05FB13", 0x81);
    usb4java.readMessage(usb4java.getDeviceInterface(usbDevice, 0), 0x01);
}

我收到此错误:

javax.usb.UsbPlatformException: USB error 1: Transfer error on bulk endpoint: Input/Output Error
at org.usb4java.javax.ExceptionUtils.createPlatformException(ExceptionUtils.java:39)
at org.usb4java.javax.IrpQueue.transferBulk(IrpQueue.java:239)
at org.usb4java.javax.IrpQueue.transfer(IrpQueue.java:197)
at org.usb4java.javax.IrpQueue.read(IrpQueue.java:126)
at org.usb4java.javax.IrpQueue.processIrp(IrpQueue.java:76)
at org.usb4java.javax.AbstractIrpQueue.process(AbstractIrpQueue.java:104)
at org.usb4java.javax.AbstractIrpQueue$1.run(AbstractIrpQueue.java:73)
at java.lang.Thread.run(Unknown Source)

但是，我的 readMessage 没有收到错误消息，有没有人知道为什么会这样或有什么提示？

提前致谢!

编辑:当我将端点更改为 0x01 时代码有效，但那个是 EP 1 OUT，0x81 是 EP 1 IN，所以这就是我应该发送消息的地方，或者不是？

编辑 2:readMessage 代码:

public void readMessage(UsbInterface iface, 
        int j){

    UsbPipe pipe = null;

    try {
        iface.claim(new UsbInterfacePolicy() {
            @Override
            public boolean forceClaim(UsbInterface usbInterface) {
                return true;
            }
        });

        UsbEndpoint endpoint = (UsbEndpoint) iface.getUsbEndpoint((byte) j); // there can be more 1,2,3..
        pipe = endpoint.getUsbPipe();
        pipe.open();

        /*pipe.addUsbPipeListener(new UsbPipeListener()
        {            
            @Override
            public void errorEventOccurred(UsbPipeErrorEvent event)
            {
                UsbException error = event.getUsbException();
                error.printStackTrace();
            }

            @Override
            public void dataEventOccurred(UsbPipeDataEvent event)
            {
                byte[] data = event.getData();

                System.out.println(data + " bytes received");
                for(int i =0 ; i<data.length; i++){System.out.print(data[i]+" ");}
            }
        });*/

        byte[] data = new byte[8];
        int received = pipe.syncSubmit(data);
        System.out.println(received + " bytes received");
        for(int i =0 ; i<data.length; i++){System.out.print(data[i]+" ");}//*/

        pipe.close();

    } catch (Exception ex) {
        ex.printStackTrace();
    } finally {
        try {
            iface.release();
        } catch (UsbClaimException e) {
            e.printStackTrace();
        } catch (UsbNotActiveException e) {
            e.printStackTrace();
        } catch (UsbDisconnectedException e) {
            e.printStackTrace();
        } catch (UsbException e) {
            e.printStackTrace();
        }
    }

}

Answer 1

是的 Fidor 是对的，0x01 用于写入，0x81 用于读取。
IN 和 OUT 是从主机 Controller 的角度来看的。

您可以从 IN 端点读取并写入 OUT 端点。唯一的异常(exception)是与方向无关的控制传输。