NAME
aps
- ThinkPad Active Protection System accelerometer
SYNOPSIS
aps0 at isa? port 0x1600
DESCRIPTION
The
aps
driver provides support for several sensors found in some ThinkPad laptops.
The sensors currently exposed via the
envsys(4)
interface are:
Sensor | Units | Typical Use
|
X_ACCEL Integer X Acceleration
|
Y_ACCEL Integer Y Acceleration
|
X_VAR Integer Weighted X Acceleration?
|
Y_VAR Integer Weighted Y Acceleration?
|
Temp1 uK Unknown
|
Temp2 uK Unknown
|
Keyboard Active Boolean Keyboard activity
|
Mouse Active Boolean Mouse activity
|
Lid Open Boolean Lid state
| | | | | | | | | | | | | | | | | | |
SEE ALSO
envsys(4),
envstat(8)
HISTORY
The
aps
driver first appeared in
OpenBSD3.8
and then was ported to
NetBSD
5.0.
AUTHORS
The
aps
driver was written by
Jonathan Gray <jsg@openbsd.org>
.
CAVEATS
The
aps
driver does not yet maintain state and subsequently does not take
evasive action when it thinks the hard drive is in danger.
The Y axis on X40 and possibly other models seems to be inverted.
It is unknown how to distinguish between different versions of the
accelerometer to compensate for this in the driver at this time.
As IBM provides no documentation, it is not known what all the available
sensors are used for.