1*560cfcceSriastradh.\" $NetBSD: i2cscan.8,v 1.7 2019/11/30 02:47:14 riastradh Exp $ 2ed0c37a1Swiz.\" 3998a133bStcort.\" Copyright (c) 2011, 2013 The NetBSD Foundation, Inc. 4ed0c37a1Swiz.\" All rights reserved. 5ed0c37a1Swiz.\" 6ed0c37a1Swiz.\" This code is derived from software contributed to The NetBSD Foundation 7ed0c37a1Swiz.\" by Thomas Klausner. 8ed0c37a1Swiz.\" 9ed0c37a1Swiz.\" Redistribution and use in source and binary forms, with or without 10ed0c37a1Swiz.\" modification, are permitted provided that the following conditions 11ed0c37a1Swiz.\" are met: 12ed0c37a1Swiz.\" 1. Redistributions of source code must retain the above copyright 13ed0c37a1Swiz.\" notice, this list of conditions and the following disclaimer. 14ed0c37a1Swiz.\" 2. Redistributions in binary form must reproduce the above copyright 15ed0c37a1Swiz.\" notice, this list of conditions and the following disclaimer in the 16ed0c37a1Swiz.\" documentation and/or other materials provided with the distribution. 17ed0c37a1Swiz.\" 18ed0c37a1Swiz.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19ed0c37a1Swiz.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20ed0c37a1Swiz.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21ed0c37a1Swiz.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22ed0c37a1Swiz.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23ed0c37a1Swiz.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24ed0c37a1Swiz.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25ed0c37a1Swiz.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26ed0c37a1Swiz.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27ed0c37a1Swiz.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28ed0c37a1Swiz.\" POSSIBILITY OF SUCH DAMAGE. 29ed0c37a1Swiz.\" 309ad20c88Shubertf.Dd November 26, 2015 31ed0c37a1Swiz.Dt I2CSCAN 8 32ed0c37a1Swiz.Os 33ed0c37a1Swiz.Sh NAME 34ed0c37a1Swiz.Nm i2cscan 35ed0c37a1Swiz.Nd scan an IIC bus for devices 36ed0c37a1Swiz.Sh SYNOPSIS 37ed0c37a1Swiz.Nm 38998a133bStcort.Op Fl r 39ed0c37a1Swiz.Ar i2cdev 40ed0c37a1Swiz.Sh DESCRIPTION 41ed0c37a1SwizThe 42ed0c37a1Swiz.Nm 439ad20c88Shubertfutility scans the Inter-Integrated Circuit bus 44ed0c37a1Swiz.Pq Xr iic 4 45ed0c37a1Swizspecified by 46ed0c37a1Swiz.Ar i2cdev 47ed0c37a1Swizto determine which addresses respond. 48ed0c37a1Swiz.Pp 499ad20c88Shubertf.Ar i2cdev 509ad20c88Shubertfcan be specified with or without the 519ad20c88Shubertf.Pa /dev 529ad20c88Shubertfprefix. 539ad20c88ShubertfFor example, 549ad20c88Shubertf.Pa /dev/iic0 559ad20c88Shubertfor 569ad20c88Shubertf.Pa iic0 . 579ad20c88Shubertf.Pp 58998a133bStcortAvailable options: 59998a133bStcort.Bl -tag -width Ds 60998a133bStcort.It Fl r 61998a133bStcortscan using 1 byte reads instead of quick writes. 62998a133bStcort.El 63998a133bStcort.Pp 64*560cfcceSriastradh.Sy WARNING : 65ed0c37a1SwizUsing this utility can access some devices in such a 66460ef575Spgoyettemanner as to leave them in an unstable or unusable state. 67ed0c37a1SwizIt can also lock up the entire 68ed0c37a1Swiz.Xr iic 4 69ed0c37a1Swizbus. 70ed0c37a1SwizDon't use this utility unless you know what you're doing and can 71ed0c37a1Swizaccept all sorts of unforeseen consequences. 72ed0c37a1Swiz.Sh EXIT STATUS 73ed0c37a1Swiz.Ex -std i2cscan 740654568cShubertf.Sh EXAMPLES 750654568cShubertfScan the first IIC bus found on the system for devices: 760654568cShubertf.Pp 770654568cShubertf.Dl "i2cscan /dev/iic0" 78ed0c37a1Swiz.Sh SEE ALSO 79ed0c37a1Swiz.Xr iic 4 80