Code
Introduction
Introduction USB programming linux linux/usb Introduction
DataLnk HID device
the device gets recognized as HID(human interface device) device.
let's take a look at lsusb
thomas@thomas-ThinkPad-R400:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 010: ID 0da4:0004 Polar Electro OY
Bus 004 Device 004: ID 0a5c:2145 Broadcom Corp. Bluetooth with Enhanced Data Rate II
Bus 004 Device 002: ID 08ff:2810 AuthenTec, Inc. AES2810
Bus 002 Device 012: ID 0bdb:1900 Ericsson Business Mobile Networks BV F3507g Mobile Broadband Module
ok looks good. now see the /dev folder where we find two devices created.
using the kernel modules hid and usbhid
thomas@thomas-ThinkPad-R400:/dev$ ls hid*
hidraw0
thomas@thomas-ThinkPad-R400:/dev/usb$ ls
hiddev0
communicate with the device
I basicly figured out 3 general options to use the device.
libusb
using libusb:
libhid
https://launchpad.net/ubuntu/jaunty/amd64/libhid0/0.2.15+20060325-2.2ubuntu1
example using libusb http://www.cs.indiana.edu/~bpisupat/work/usb.html http://www.cs.indiana.edu/~bpisupat/work/oc_usb.c
/dev/hidraw0 or /dev/usb/hiddev0
http://www.mjmwired.net/kernel/Documentation/hid/hidraw.txt http://lxr.free-electrons.com/source/samples/hidraw/hid-example.c
usbsnoop
helps understanding the protocoll MUST READ!
snoop log to c code usbsnoop info
links
Development of a User-Space Application for an HID Device, Using libhid