NAME
hpacel —
HP 3D DriveGuard
accelerometer
SYNOPSIS
hpacel* at acpi?
DESCRIPTION
The
hpacel 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).