2015-11-27 02:29:05 +03:00
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.\" $NetBSD: i2cscan.8,v 1.6 2015/11/26 23:29:05 wiz Exp $
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2011-10-06 15:13:45 +04:00
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.\"
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2013-07-10 19:18:54 +04:00
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.\" Copyright (c) 2011, 2013 The NetBSD Foundation, Inc.
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2011-10-06 15:13:45 +04:00
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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 Thomas Klausner.
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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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2015-11-26 20:31:56 +03:00
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.Dd November 26, 2015
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2011-10-06 15:13:45 +04:00
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.Dt I2CSCAN 8
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.Os
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.Sh NAME
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.Nm i2cscan
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.Nd scan an IIC bus for devices
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.Sh SYNOPSIS
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.Nm
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.Op Fl r
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2011-10-06 15:13:45 +04:00
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.Ar i2cdev
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.Sh DESCRIPTION
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The
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.Nm
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utility scans the Inter-Integrated Circuit bus
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.Pq Xr iic 4
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specified by
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.Ar i2cdev
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to determine which addresses respond.
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.Pp
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.Ar i2cdev
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can be specified with or without the
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.Pa /dev
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prefix.
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For example,
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.Pa /dev/iic0
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or
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.Pa iic0 .
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.Pp
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Available options:
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.Bl -tag -width Ds
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.It Fl r
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scan using 1 byte reads instead of quick writes.
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.El
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.Pp
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2011-10-06 15:13:45 +04:00
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.Em WARNING !
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Using this utility can access some devices in such a
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manner as to leave them in an unstable or unusable state.
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It can also lock up the entire
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.Xr iic 4
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bus.
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Don't use this utility unless you know what you're doing and can
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accept all sorts of unforeseen consequences.
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.Sh EXIT STATUS
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.Ex -std i2cscan
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.Sh EXAMPLES
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Scan the first IIC bus found on the system for devices:
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.Pp
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.Dl "i2cscan /dev/iic0"
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.Sh SEE ALSO
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.Xr iic 4
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