使用usb4java向USB设备发送消息-输入/输出错误
我正在尝试使用以下代码向我的USB设备(Silicon Labs USB-UART桥接器)发送消息:使用usb4java向USB设备发送消息-输入/输出错误,java,usb,libusb-1.0,usb4java,libusb-win32,Java,Usb,Libusb 1.0,Usb4java,Libusb Win32,我正在尝试使用以下代码向我的USB设备(Silicon Labs USB-UART桥接器)发送消息: public void sendMessage(UsbInterface iface, String message, int i){ UsbPipe pipe = null; try { iface.claim(new UsbInterfacePolicy() { @Override publi
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);
}
我得到这个错误:
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)
然而,我的readMessage没有收到错误消息,有人知道为什么会这样,或者有人得到了提示吗
提前谢谢
编辑:当我将端点更改为0x01时,代码会生效,但该端点是EP 1 out,0x81是EP 1 IN,所以我应该在那里发送消息还是不发送消息 编辑2:readMessage的代码:
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();
}
}
}
public void readMessage(UsbInterface iface,
int(j){
UsbPipe管道=空;
试一试{
iface.索赔(新的UsbInterfacePolicy(){
@凌驾
公共布尔forceClaim(UsbInterface UsbInterface){
返回true;
}
});
UsbEndpoint endpoint=(UsbEndpoint)iface.getUsbEndpoint((字节)j);//可以有更多的1,2,3。。
pipe=endpoint.getUsbPipe();
管道打开();
/*addUsbPipeListener(新的UsbPipeListener()
{
@凌驾
发生公共无效ErrorEvent(UsbPipeErrorEvent事件)
{
UsbException error=event.getUsbException();
错误。printStackTrace();
}
@凌驾
发生公共无效DataEvent(UsbPipeDataEvent事件)
{
byte[]data=event.getData();
System.out.println(数据+“接收字节”);
对于(int i=0;iYes),Fidor是正确的0x01用于写入,0x81用于读取。
输入和输出是从主机控制器的角度进行的
您可以从IN端点读取和写入OUT端点。唯一的例外是方向独立的控制传输。抱歉,以下是我得到的描述符:
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 64
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 64
bInterval 0
“当我将端点更改为0x01时,代码会生效,但那一个是EP1 out”-我怀疑术语混淆。我猜是“out”从客户端的角度来看。这是您的输出,即管道的输入…当我尝试从0x81读取时,我得到了与readMessage完全相同的errormessage。sendMessage似乎可以工作。完全相同的意思也是USB错误1?您查看过这些端点的端点描述符吗?是的,如上所述的相同错误,我使用设备转储获取了端点描述符,这些是描述符:我看不到任何描述符。您单击了添加注释吗?因此端点是正确的。传输一定有问题。您可以用readMessage源代码编辑问题吗?