2013-03-09 – The Smell of Molten Projects in the Morning

I’ve always wondered what the LinuxCNC HAL pin names would be for an ordinary mouse, particularly nowadays when an Arduino Leonardo can become a USB HID gadget without much effort at all. If one had a Leonardo and l337 programming skillz, one might receive far more interesting data than just fast-twitch muscle movement…

Logitech Optical Mouse - LinuxCNC box — Logitech Optical Mouse – LinuxCNC box

So. We begin…

From less /proc/bus/input/devices:

... snippage ...
I: Bus=0003 Vendor=046d Product=c077 Version=0111
N: Name="Logitech USB Optical Mouse"
P: Phys=usb-0000:00:1d.0-1/input0
S: Sysfs=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/input/input10
U: Uniq=
H: Handlers=mouse3 event10
B: EV=17
B: KEY=ff0000 0 0 0 0 0 0 0 0
B: REL=143
B: MSC=10

From ll /dev/input:

... snippage ...
crw-r-----   1 root root 13, 74 2013-02-23 07:46 event10
... snippage ...
crw-r-----   1 root root 13, 35 2013-02-23 07:46 mouse3

Manually beat the permissions into shape, because this is a one-off affair:

sudo chgrp users /dev/input/event10
sudo chgrp users /dev/input/mouse3
sudo chmod g+w /dev/input/event10
sudo chmod g+w /dev/input/mouse3

Find the USB address from lsusb:

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 006: ID 06f2:0011 Emine Technology Co. KVM Switch Keyboard
Bus 004 Device 005: ID 046d:c401 Logitech, Inc. TrackMan Marble Wheel
Bus 004 Device 004: ID 04d9:1203 Holtek Semiconductor, Inc. MC Industries Keyboard
Bus 004 Device 003: ID 046d:c216 Logitech, Inc. Dual Action Gamepad
Bus 004 Device 002: ID 0451:2046 Texas Instruments, Inc. TUSB2046 Hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 046d:c077 Logitech, Inc.
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Query the attributes with udevadm:

udevadm info --query=all --attribute-walk --name=/dev/bus/usb/002/002
... snippage ...
  looking at device '/devices/pci0000:00/0000:00:1d.0/usb2/2-1':
    KERNEL=="2-1"
    SUBSYSTEM=="usb"
    DRIVER=="usb"
    ATTR{configuration}==""
    ATTR{bNumInterfaces}==" 1"
    ATTR{bConfigurationValue}=="1"
    ATTR{bmAttributes}=="a0"
    ATTR{bMaxPower}==" 98mA"
    ATTR{urbnum}=="13"
    ATTR{idVendor}=="046d"
    ATTR{idProduct}=="c077"
    ATTR{bcdDevice}=="6700"
    ATTR{bDeviceClass}=="00"
    ATTR{bDeviceSubClass}=="00"
    ATTR{bDeviceProtocol}=="00"
    ATTR{bNumConfigurations}=="1"
    ATTR{bMaxPacketSize0}=="8"
    ATTR{speed}=="1.5"
    ATTR{busnum}=="2"
    ATTR{devnum}=="2"
    ATTR{version}==" 2.00"
    ATTR{maxchild}=="0"
    ATTR{quirks}=="0x0"
    ATTR{authorized}=="1"
    ATTR{manufacturer}=="Logitech"
    ATTR{product}=="USB Optical Mouse"

Fire up halrun, load hal_input, and dump the pins:

halrun
halcmd: loadusr -W hal_input -KRAL Optical
halcmd: show all
Loaded HAL Components:
ID      Type  Name                                      PID   State
     5  User  hal_input                                  1693 ready
     3  User  halcmd1692                                 1692 ready

Component Pins:
Owner   Type  Dir         Value  Name
     5  bit   OUT         FALSE  input.0.btn-back
     5  bit   OUT          TRUE  input.0.btn-back-not
     5  bit   OUT         FALSE  input.0.btn-extra
     5  bit   OUT          TRUE  input.0.btn-extra-not
     5  bit   OUT         FALSE  input.0.btn-forward
     5  bit   OUT          TRUE  input.0.btn-forward-not
     5  bit   OUT         FALSE  input.0.btn-middle
     5  bit   OUT          TRUE  input.0.btn-middle-not
     5  bit   OUT         FALSE  input.0.btn-mouse
     5  bit   OUT          TRUE  input.0.btn-mouse-not
     5  bit   OUT         FALSE  input.0.btn-right
     5  bit   OUT          TRUE  input.0.btn-right-not
     5  bit   OUT         FALSE  input.0.btn-side
     5  bit   OUT          TRUE  input.0.btn-side-not
     5  bit   OUT         FALSE  input.0.btn-task
     5  bit   OUT          TRUE  input.0.btn-task-not
     5  s32   OUT             0  input.0.rel-hwheel-counts
     5  float OUT             0  input.0.rel-hwheel-position
     5  bit   IN          FALSE  input.0.rel-hwheel-reset
     5  float IN              1  input.0.rel-hwheel-scale
     5  s32   OUT             0  input.0.rel-wheel-counts
     5  float OUT             0  input.0.rel-wheel-position
     5  bit   IN          FALSE  input.0.rel-wheel-reset
     5  float IN              1  input.0.rel-wheel-scale
     5  s32   OUT             0  input.0.rel-x-counts
     5  float OUT             0  input.0.rel-x-position
     5  bit   IN          FALSE  input.0.rel-x-reset
     5  float IN              1  input.0.rel-x-scale
     5  s32   OUT             0  input.0.rel-y-counts
     5  float OUT             0  input.0.rel-y-position
     5  bit   IN          FALSE  input.0.rel-y-reset
     5  float IN              1  input.0.rel-y-scale
... snippage ...

Hmmm, that was interesting…

Day: March 9, 2013

HAL Pin Names for a Bone-Stock USB Mouse