68 lines
2.3 KiB
Groff
68 lines
2.3 KiB
Groff
.\" $NetBSD: mpl115a.4,v 1.2 2013/09/09 08:23:54 wiz Exp $
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.\"
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.\" Copyright (c) 2013 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Radoslaw Kujawa.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 8, 2013
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.Dt MPL115A 4
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.Os
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.Sh NAME
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.Nm mpl115a
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.Nd Freescale MPL115A2 absolute pressure sensor driver
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.Sh SYNOPSIS
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.Cd "mpl115a* at iic? addr 0x60"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the MPL115A2 pressure sensor.
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It allows reporting absolute pressure through the
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.Xr envsys 4
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API.
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.Sh SEE ALSO
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.Xr envsys 4
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.Sh HISTORY
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The
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.Nm
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device first appeared in
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.Nx 7.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Radoslaw Kujawa Aq radoslaw.kujawa@gmail.com .
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The fixed-point pressure calculation algorithm was suggested by
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.An Matt Thomas .
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.Sh CAVEATS
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The MPL115A2 chip has an accuracy of +/- 1 kPa, which makes it not very useful
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for weather-related applications.
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.Pp
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The
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.Xr envsys 4
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API does not support pressure reporting yet, so the result is reported just as
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integer number.
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