109 lines
2.7 KiB
Groff
109 lines
2.7 KiB
Groff
.\" Copyright (c) 2018 Emmanuel Vadot <manu@freebsd.org>
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd January 12, 2019
|
|
.Dt PWM 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pwm
|
|
.Nd configure pwm controller
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl f Ar device
|
|
.Fl c Ar channel
|
|
.Fl E
|
|
.Nm
|
|
.Op Fl f Ar device
|
|
.Fl c Ar channel
|
|
.Fl D
|
|
.Nm
|
|
.Op Fl f Ar device
|
|
.Fl c Ar channel
|
|
.Fl C
|
|
.Nm
|
|
.Op Fl f Ar device
|
|
.Fl c Ar channel
|
|
.Fl p Ar period
|
|
.Nm
|
|
.Op Fl f Ar device
|
|
.Fl c Ar channel
|
|
.Fl d Ar duty
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility can be used to configure pwm controllers.
|
|
.Pp
|
|
The options are as follow:
|
|
.Bl -tag -width "-c channel"
|
|
.It Fl c Ar channel
|
|
Channel number to operate on
|
|
.It Fl f Ar device
|
|
Device to operate on.
|
|
If not specified,
|
|
.Pa /dev/pwmc0
|
|
is used.
|
|
.It Fl E
|
|
Enable the pwm channel
|
|
.It Fl D
|
|
Disable the pwm channel
|
|
.It Fl C
|
|
Show the configuration of the pwm channel
|
|
.It Fl p Ar period
|
|
Configure the period (in nanoseconds) of the pwm channel
|
|
.It Fl d Ar duty
|
|
Configure the duty (in nanoseconds or percentage) of the pwm channel
|
|
.El
|
|
.Sh EXAMPLES
|
|
.Bl -bullet
|
|
.It
|
|
Show the configuration of the pwm channel:
|
|
.Bd -literal
|
|
pwm -f /dev/pwmc0 -C
|
|
.Ed
|
|
.It
|
|
Configure a 50000 ns period and a 25000 duty cycle:
|
|
.Bd -literal
|
|
pwm -f /dev/pwmc0 -p 50000 -d 25000
|
|
.Ed
|
|
.It
|
|
Configure a 50% duty cycle:
|
|
.Bd -literal
|
|
pwm -f /dev/pwmc0 -d 50%
|
|
.Ed
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr pwm 9 ,
|
|
.Xr pwmbus 9
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
utility appeared in
|
|
.Fx 13.0 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
The
|
|
.Nm
|
|
utility and this manual page were written by
|
|
.An Emmanuel Vadot Aq Mt manu@FreeBSD.org .
|