xref: /freebsd/share/man/man4/uchcom.4 (revision fa9896e082a1046ff4fbc75fcba4d18d1f2efc19)

.\" $NetBSD: uchcom.4,v 1.2 2008/04/30 13:10:54 martin Exp $
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Takuya SHIOZAKI (tshiozak@netbsd.org).
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.Dd April 26, 2017
.Dt UCHCOM 4
.Os
.Sh NAME
.Nm uchcom
.Nd WinChipHead CH341/CH340 serial adapter driver
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device usb"
.Cd "device ucom"
.Cd "device uchcom"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
uchcom_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for the WinChipHead CH341/CH340 USB-to-RS-232
Bridge chip.
.Pp
The device is accessed through the
.Xr ucom 4
driver which makes it behave like a
.Xr tty 4 .
.Sh HARDWARE
The
.Nm
driver supports the following adapters:
.Pp
.Bl -bullet -compact
.It
HL USB-RS232
.El
.Sh FILES
.Bl -tag -width "/dev/ttyU*.init" -compact
.It Pa /dev/ttyU*
for callin ports
.It Pa /dev/ttyU*.init
.It Pa /dev/ttyU*.lock
corresponding callin initial-state and lock-state devices
.Pp
.It Pa /dev/cuaU*
for callout ports
.It Pa /dev/cuaU*.init
.It Pa /dev/cuaU*.lock
corresponding callout initial-state and lock-state devices
.El
.Sh SEE ALSO
.Xr tty 4 ,
.Xr ucom 4 ,
.Xr usb 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Nx .
The first
.Fx
release to include it was
.Fx 8.0 .
.Sh BUGS
Actually, this chip seems unable to drive other than 8 data bits and
1 stop bit line.