Thanks your positive response. You inspire me and give me the direction.
So I will state ONE MORE TIME: you need to download and read the HID
spec. Until you do, I am not going to answer any more of your
questions.
==> Yes, you are absolutely right and really instruct me.
This time I follow the spec(HID-USB) which you post the link and read it
for a while. Below 5 issues are my concepts and queries, Could you give
me any your dirction or correct to my concepts?
In Linux and JAVA
Q1: Is it rigth that I should use the object "UsbControlIrp"
to get or set the value to the specific "ReportID"
Q2: Below is my object inherited sequence from the top to the bottom
UsbDevice -> UsbConfiguration -> UsbInterface
-> UsbEndpoint (only one) -> UsbPipe -> UsbControlIrp
Q3: 7.2.1 Get_Report_Request :
I could get the value by the specific ReportID
=> bmRequestType = 1010001 = 161 = 0xA1
=> bRequest = GET_REPORT = 0x01
=> wValue = Report_Type and Report_ID = 0x031D
(ex : Report_Type=feature(03) and Report_ID=29(DEC))
Q4: If everything is right and run well, the data[] should be filled
with the data and
could be printed the value at the line14, right?
Q5: However, this time I block in the line 12(pipe.syncSubmit(irp)) and no
any print on the screen.
Could you tell me any advice?
<<Line and Code>>
1. UsbPipe pipe = endpoint.getUsbPipe();
2. byte bmRequestType = (byte)0xA1;
3. byte bRequest = (byte)0x01;
4. short wValue = 0x031D;
5. short wIndex = 0;
6. UsbControlIrp irp = pipe.createUsbControlIrp(bmRequestType, bRequest,
wValue, wIndex);
7. byte data[] = new byte[8];
8. irp.setData(data);
9. pipe.open();
10. int a =0;
11. while(true){
12. pipe.syncSubmit(irp);
13. for(int i=0; i<data.length; i++){
14. System.out.print(data[i]+" ");
15. }
16. irp.setComplete(false);
17. sleep(1000);
18. }
Thanks your reading
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