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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