tks for your great help.
please take a look at the result of my program and partial source code, and i
have new question as the following.
a. from the display result, could i be told that this device is HID?
b. the running result shows that "Could not claim interface : Device or
resource busy', from the source code, u can see that i did interf.claim() and
interf.release(), why it still happen?
c. i received 2 device at work, 1 is attached USB device, this device's info is
collected/displayed at the following, another remote wireless device can send
signal/data to this attached USB device.
from my program, u can see that i opened the pipe, but how can my program
know remote device whether send signal to this device or not? should i
implement listener?
also, how can my program know how many bytes remote device send to
attached USB device? and how to read in?
follow your advise, i make big progress, so any further help is greatly
appreciated.
tks in advance
john
the display info:
-------------------------------------------------------------------------------------------
devics manufactur is Microchip Technology Inc.
devics product string is 802.15.4 2.4GHz Packet Sniffer
devics product desc is bLength : 18
bDescriptorType : 0x01
bcdUSB : 0200
bDeviceClass : 0x00
bDeviceSubClass : 0x00
bDeviceProtocol : 0x00
bMaxPacketSize0 : 8
idVendor : 0x04d8
idProduct : 0x000e
bcdDevice : 0000
iManufacturer : 1
iProduct : 2
iSerialNumber : 0
bNumConfigurations : 1
devics version is 0.0.0
USB version is 2.0.0
this is USB function
802.15.4 2.4GHz Packet Sniffer is configured
active config is com.ibm.jusb.usbconfiguration...@1787038
active config number is 1
active config include
com.ibm.jusb.usbconfiguration...@1787038
bNumInterfaces()=1
print IO begin
all settings is [com.ibm.jusb.usbinterface...@55571e]
usb configuration belong to =com.ibm.jusb.usbconfiguration...@1787038
usb configuration desc = bLength : 9
bDescriptorType : 0x04
bInterfaceNumber : 0
bAlternateSetting : 0
bNumEndpoints : 2
bInterfaceClass : 0x03
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0
getInterfaceString = null
Endpoint address =129
max packet size=64 bytes
Endpoint address =129
max packet size=64 bytes
print IO end
test IO begin
javax.usb.UsbPlatformException: Could not claim interface : Device or resource
busy
at com.ibm.jusb.os.linux.JavaxUsb.errorToUsbException(JavaxUsb.java:73)
at
com.ibm.jusb.os.linux.LinuxInterfaceOsImp.claim(LinuxInterfaceOsImp.java:88)
at com.ibm.jusb.UsbInterfaceImp.claim(UsbInterfaceImp.java:109)
at com.ibm.jusb.UsbInterfaceImp.claim(UsbInterfaceImp.java:83)
at TraverseUSB.testIO(TraverseUSB.java:161)
at TraverseUSB.traverse(TraverseUSB.java:62)
at TraverseUSB.traverse(TraverseUSB.java:33)
at TraverseUSB.traverse(TraverseUSB.java:33)
at TraverseUSB.main(TraverseUSB.java:16)
test IO end
the partial source code:
------------------------------------------------------------------------------------------------
public static void testIO(UsbDevice device) {
try {
// Access to the active configuration of the USB device, obtain
// all the interfaces available in that configuration.
UsbConfiguration config = device.getActiveUsbConfiguration();
List totalInterfaces = config.getUsbInterfaces();
// Traverse through all the interfaces, and access the endpoints
// available to that interface for I/O.
for (int i=0; i<totalInterfaces.size(); i++) {
UsbInterface interf = (UsbInterface) totalInterfaces.get(i);
interf.claim();
System.out.println(" all settings is "+interf.getSettings());
System.out.println(" usb configuration belong to
="+interf.getUsbConfiguration());
System.out.println(" usb configuration desc =
"+interf.getUsbInterfaceDescriptor());
System.out.println(" getInterfaceString = "+interf.getInterfaceString());
List totalEndpoints = interf.getUsbEndpoints();
for (int j=0; j<totalEndpoints.size(); j++) {
// Access the particular endpoint, determine the direction
// of its data flow, and type of data transfer, and open the
// data pipe for I/O.
UsbEndpoint ep = (UsbEndpoint) totalEndpoints.get(i);
int direction = ep.getDirection();
int type = ep.getType();
UsbPipe pipe = ep.getUsbPipe();
pipe.open();
// Perform I/O through the USB pipe here.
pipe.close();
}
interf.release();
}
} catch (Exception e) { e.printStackTrace();}
}
--- On Tue, 3/17/09, Dan Streetman <ddstr...@ieee.org> wrote:
From: Dan Streetman <ddstr...@ieee.org>
Subject: Re: HID device
To: chicagoshw...@yahoo.com
Cc: javax-usb-devel@lists.sourceforge.net
Date: Tuesday, March 17, 2009, 6:27 PM
> a. how to check the attached device is HID device?
While "HID device" is common in referring to such devices,
technically
it is each device interface that implements the HID class.
So you should check the device's interface(s), the interface
descriptor for each interface will have a class. If that class is
HID, then the interface supports the HID protocol. See the javax.usb
API, specifically the UsbInterface and UsbInterfaceDescriptor. The
API is part of the source code or on the website:
http://javax-usb.org/jdoc/
> b. do u have any example to show us about implementing USB<->HID
translation
> on top of javax.usb?
No, not really. HID is actually not nearly as complicated as most
other protocols, but it's still fairly complicated. However, for many
HID devices, there is a very limited number of reports that they use,
so many times you don't have to actually implement the entire HID
spec, and if you're just talking to this one device that you know the
specific HID Report descriptors to (i.e. you know all its reports),
then you can "fake" talking HID to it. For example, you can parse
the
device's HID report descriptor(s) manually (i.e., read the binary
yourself and parse it) and then you know the specific reports the
device will send/receive. You then don't need to implement a HID
parser, because you're only talking to the one HID device and you can
code directly to what its HID reports will look like.
> c. if you do not have examples handy, so what is the approach/advise/steps
> to implement USB<->HID?
> d. where i can find more info about HID protocol specfication?
First you will need to read the HID spec. If you haven't read the USB
spec either, you need to read that too, Chapter 5 and 9 I think (not
sure) are the relevant parts. The HID and USB specs are both
available from http://usb.org
> e. javax-usb support both USB 1.x and USB 2.x?
What specifically do you mean by "support"? Do you mean, will USB
2.0
devices work with javax.usb? Yes, they will.
On Tue, Mar 17, 2009 at 5:39 PM, wind sh <chicagoshw...@yahoo.com> wrote:
>
> I asked you the question regarding zigbee device last week, and get lots
of
> help from you...
>
> today i received the actual device, and was told that it is HID
device..and
> this HID device received remote data by zigbee protocol...
>
> i reviewed your site's FAQ again, it says the following:
>
> HID is a protocol layered on top of USB, so you can use any HID device
with
> javax.usb. However you will need to implement USB<->HID translation
on top
> of javax.usb. You will need to be familiar with the HID specification to
do
> this.
>
> then, i have the following as the following:
>
> a. how to check the attached device is HID device?
>
> b. do u have any example to show us about implementing USB<->HID
translation
> on top of javax.usb?
>
> c. if you do not have examples handy, so what is the approach/advise/steps
> to implement USB<->HID?
>
> d. where i can find more info about HID protocol specfication?
>
> e. javax-usb support both USB 1.x and USB 2.x?
>
> tks in advance, your comments is really helpful.
>
> john
>
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