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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