.\" Copyright (c) 1998, Nicolas Souchu
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.\" $FreeBSD: src/share/man/man4/iic.4,v 1.6.2.3 2001/08/17 13:08:38 ru Exp $
.\" $DragonFly: src/share/man/man4/iic.4,v 1.2 2003/06/17 04:36:59 dillon Exp $
.\"
.Dd October 25, 1998
.Dt IIC 4
.Os
.Sh NAME
.Nm iic
.Nd I2C generic i/o device driver
.Sh SYNOPSIS
.Cd "device iic"
.Sh DESCRIPTION
The
.Em iic
character device driver provides generic i/o to any
.Xr iicbus 4
instance.
In order to control I2C devices, use /dev/iic? with the
following ioctls:
.Pp
.Bl -column "I2CRSTCARD" -compact
.It Em Ioctl Ta Em Description
.It Sy I2CSTART Ta "send start condition to the specified device (with 7-bit address) on the bus"
.It Sy I2CSTOP Ta "send stop condition to the bus"
.It Sy I2CRSTCARD Ta "reset the bus"
.El
.Pp
You may also use read/write routines, then I2C start/stop handshake is
managed by the iicbus system.
.Sh SEE ALSO
.Xr iicbus 4
.Sh HISTORY
The
.Nm
manual page first appeared in
.Fx 3.0 .
.Sh AUTHORS
This
manual page was written by
.An Nicolas Souchu .