| HPACEL(4) | Device Drivers Manual | HPACEL(4) |
hpacel — HP 3D
DriveGuard accelerometer
hpacel* at acpi?
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.
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.
The hpacel device driver appeared in
NetBSD 6.0.
Jukka Ruohonen ⟨jruohonen@iki.fi⟩
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).
| September 7, 2011 | NetBSD 11.0 |