hey, thanks for the response.
1) Yes HID is claiming my device. Which at this point
I think it is a good thing. Previously, I was planning
on writing my own driver!! Now I hope I can use HID to
control it.
2)Yes /dev/usb/hiddev0 along with hiddev1 - hiddev15
are in the same directory. But I know for a fact that
hiddev0 is my device. It is the only one that doesn't
return an error when I try to open it with my program.
It's also the only USB device plugged in so... :)
3)The specs on the device state that to initiate a
data transfer I must send it the 8-bit value '0x02'.
Then it will send back either and 'ack' or 'nack'
followed by a new line control byte. (note: all
commands are 8-bits long). Then I can proceed to send
more control bytes.
4)I'm going to answer a question with another question
but... I am actually using g++ to compile because I'm
going to need to use inherritance and classes and
stuff down the line. so I'm not actually using fd =
open( ... ), g++ won't compile it. I am using fd =
fopen( "/dev/...", r); fdout = fopen( "/dev..", w) and
it doesn't return an error; fopen returns: INT format:
134520664 Hex:0x8049f58 I check to make sure its open.
5) I'm not sure what you mean by EP.
Hope this helps.
Thanks
--- Shiva_Shankar <[EMAIL PROTECTED]> wrote:
> Hi,
> Let me get the problem right!! Please dont mind if
> you find my questions
> very annoying, just am trying to understand the
> problem.
>
> 1. Is the HID module claiming your device??
> 2. Are you able to see the file /dev/usb/hiddev0??
> 3. Can you let me know if there is any control word
> you need to send to
> initiate the transfer.
> 4. what is fd = open("/dev/usb/hiddev0") returning?
> 5. Are you performing the read on the right EP?
>
> -----Original Message-----
> From: Froilan A. Olivas [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, December 23, 2003 7:41 AM
> To: [EMAIL PROTECTED]
> Subject: [Linux-usb-users] New USB Device
>
>
> Hello all,
>
> I have a new device that lets me turn off and on an
> ac
> device. This device conects to my computer through
> (of course) USB interface. I am running linux
> 2.4.20-8. when I run /proc/bus/usb/devices it
> outputs:
>
> T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 18
> Spd=1.5 MxCh= 0
> D: Ver= 1.0a Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8
> #Cfgs= 2
> P: Vendor=05e1 ProdID=0003 Rev= 0.00
> S: Manufacturer=Wonderland
> S: Product=Wonderland USB
> C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
> I: If#= 0 Alt= 0 #EPs= 2 Cls=03(HID ) Sub=00
> Prot=00
> Driver=hid
> E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=10ms
> E: Ad=01(O) Atr=03(Int.) MxPS= 8 Ivl=10ms
> C: #Ifs= 1 Cfg#= 2 Atr=80 MxPwr=500mA
> I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00
> Prot=00
> Driver=(none)
> E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=10ms
> E: Ad=01(O) Atr=03(Int.) MxPS= 8 Ivl=10ms
>
>
> Here is my question, please, please help me. I know
> that Cls=03( HID ) means it is using a human
> interface device driver, it is at
> /dev/usb/hiddev0.
> When I open it and try to write to it and read from
> it, it hangs i.e it waits forever for a read. (Note:
> I
> am trying to write my own program to send and
> receive
> commands to this device.) Does the 2nd "D" line
> Cls=ff(vend.) mean I need a vendor specific driver
> along with the hid driver?? If not then shouldn't a
> simple fd = open("/dev/usb/hiddev0") ... work.
> Maybe
> a simple explination on how hid driver works.
> Please
> help.
>
> Thanks
>
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