1.\" $NetBSD: i2cscan.8,v 1.6 2015/11/26 23:29:05 wiz Exp $ 2.\" 3.\" Copyright (c) 2011, 2013 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Thomas Klausner. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd November 26, 2015 31.Dt I2CSCAN 8 32.Os 33.Sh NAME 34.Nm i2cscan 35.Nd scan an IIC bus for devices 36.Sh SYNOPSIS 37.Nm 38.Op Fl r 39.Ar i2cdev 40.Sh DESCRIPTION 41The 42.Nm 43utility scans the Inter-Integrated Circuit bus 44.Pq Xr iic 4 45specified by 46.Ar i2cdev 47to determine which addresses respond. 48.Pp 49.Ar i2cdev 50can be specified with or without the 51.Pa /dev 52prefix. 53For example, 54.Pa /dev/iic0 55or 56.Pa iic0 . 57.Pp 58Available options: 59.Bl -tag -width Ds 60.It Fl r 61scan using 1 byte reads instead of quick writes. 62.El 63.Pp 64.Em WARNING ! 65Using this utility can access some devices in such a 66manner as to leave them in an unstable or unusable state. 67It can also lock up the entire 68.Xr iic 4 69bus. 70Don't use this utility unless you know what you're doing and can 71accept all sorts of unforeseen consequences. 72.Sh EXIT STATUS 73.Ex -std i2cscan 74.Sh EXAMPLES 75Scan the first IIC bus found on the system for devices: 76.Pp 77.Dl "i2cscan /dev/iic0" 78.Sh SEE ALSO 79.Xr iic 4 80