Hi,
I try to get the mentioned USB device to run in Linux. It is a small (USB
stick sized) device, which only passes through the radio signal to the
line in. Control is done via USB.
I did some reverse engineering in Windows and I think I determined all
important functions (i.e. bytes :) ).
As it is a HID device I started to read something about HID on usb.org and
in linux/Documentation and I began to write a user space program which
accesses the device through the /dev/usb/hiddev*-file.
My problem now is, I don't know how to control the device using the
ioctl-calls. I see the bytes from the rev-eng. but I don't know what
they mean regarding to the HID-specs. Report_id, -_type, or something.
For example:
setting a frequency looks like this:
buffer
to ep 2: 00 55 aa 03 a4 00 00 08 (0xa4 probably mean tunetofreq)
to ep 2: 20 2e 01 00 00 00 00 00 (mean 102750 kHz)
switching mono/stereo like this:
buffer
to ep 2: 00 55 aa 00 ae 01 00 00 (0xae mono/stereo, 0x01 mean mono)
So sometimes an extra buffer is necessary sometimes not.
I would very much appreciate if someone could point me out, how I have to
write the buffer above using the ioctl-calls for the hiddev. Or is the
user-space hid stuff not appropriate, shall I use libhid ?
On the following website I put the complete reverse-engineer-log (and my
interpretation) and the lsusb output.
http://www-zeuthen.desy.de/~pboettch/usbradio/
Thanks in advance,
Patrick.
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