freebsd-dev/share/man/man4/iic.4
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.\" Copyright (c) 1998, Nicolas Souchu
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 1. Redistributions of source code must retain the above copyright
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" $FreeBSD$
.\"
.Dd October 25, 1998
.Dt IIC 4
.Os FreeBSD
.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 "Ioctls" -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.
.Pp
.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 .