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