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HPACEL(4) NetBSD Kernel Interfaces Manual HPACEL(4)
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by Kimmo Suominen.
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hpacel -- HP 3D DriveGuard accelerometer
hpacel* at acpi?
The hpacel device driver supports accelerometers that are commonly avail-
able 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 suit-
able 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 <email@example.com>
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).
NetBSD 10.99 September 7, 2011 NetBSD 10.99