tree 279105827ef53b465ac4f1ca3ea2b32026846c2f
parent ddf1ceb647d029febfd007b389cd92c84668a03c
author Mathias Agopian <mathias@google.com> 1289527131 -0800
committer Mathias Agopian <mathias@google.com> 1340842074 -0700

Uses 4-th order low-pass for extracting gravity.

Most accelerometers have 8-bits accuracy so we beed to
reject 48dB in thestop-band, which requires a 4-th order
filter at the cut-off frequency we're using.

Change-Id: Ic00421d38d751641f86b1f3ad7663e6b44a91198