1.\" Copyright (c) 1998, Nicolas Souchu 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd October 25, 1998 28.Dt IIC 4 29.Os 30.Sh NAME 31.Nm iic 32.Nd I2C generic i/o device driver 33.Sh SYNOPSIS 34.Cd "device iic" 35.Sh DESCRIPTION 36The 37.Em iic 38character device driver provides generic i/o to any 39.Xr iicbus 4 40instance. 41In order to control I2C devices, use 42.Pa /dev/iic? 43with the 44following ioctls: 45.Pp 46.Bl -column "I2CRSTCARD" -compact 47.It Em Ioctl Ta Em Description 48.It Sy I2CSTART Ta "send start condition to the specified device (with 7-bit address) on the bus" 49.It Sy I2CSTOP Ta "send stop condition to the bus" 50.It Sy I2CRSTCARD Ta "reset the bus" 51.El 52.Pp 53You may also use read/write routines, then I2C start/stop handshake is 54managed by the iicbus system. 55.Sh SEE ALSO 56.Xr iicbus 4 57.Sh HISTORY 58The 59.Nm 60manual page first appeared in 61.Fx 3.0 . 62.Sh AUTHORS 63This 64manual page was written by 65.An Nicolas Souchu . 66