NAME
hpacel
—
HP 3D DriveGuard
accelerometer
SYNOPSIS
hpacel* at acpi?
DESCRIPTION
Thehpacel
device driver supports accelerometers that
are commonly available in Hewlett-Packard laptops. The supported chip is
LIS3LV02DL
from STMicroelectronics, although other
chips from the same family, such as LIS3LV02DQ
, may
also work, provided that the vendor has implemented suitable
ACPI
access methods.
The hpacel
driver reports the acceleration
readings of the X-, Y-, and Z-axis via the
envsys(4) API and the
envstat(8) command.
SEE ALSO
acpi(4), aps(4), hpqlb(4), wmihp(4)
STMicroelectronics, LIS3LV02DL: 3-Axis - ±2g/±6g digital output low voltage linear accelerometer. AN2381 Application Note, Revision 1, http://www.st.com/stonline/products/literature/anp/12441.pdf, June, 2006.
HISTORY
The hpacel
device driver appeared in
NetBSD 6.0.
AUTHORS
Jukka Ruohonen ⟨jruohonen@iki.fi⟩
BUGS
The used accelerometer chip is capable of generating wake-up,
direction detection, and free-fall interrupts. In the ideal situation these
could be used to evoke possible emergency action. However, the
hpacel
driver only reports the readings from the
accelerometer via
sysmon_envsys(9).