1.\" $NetBSD: uchcom.4,v 1.2 2008/04/30 13:10:54 martin Exp $ 2.\" 3.\" Copyright (c) 2007 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Takuya SHIOZAKI (tshiozak@netbsd.org). 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.\" $FreeBSD: head/share/man/man4/uchcom.4 227750 2011-11-20 12:18:21Z miwi $ 31.\" 32.Dd November 20, 2011 33.Dt UCHCOM 4 34.Os 35.Sh NAME 36.Nm uchcom 37.Nd WinChipHead CH341/CH340 serial adapter driver 38.Sh SYNOPSIS 39To compile this driver into the kernel, 40place the following lines in your 41kernel configuration file: 42.Bd -ragged -offset indent 43.Cd "device usb" 44.Cd "device ucom" 45.Cd "device uchcom" 46.Ed 47.Pp 48Alternatively, to load the driver as a 49module at boot time, place the following line in 50.Xr loader.conf 5 : 51.Bd -literal -offset indent 52uchcom_load="YES" 53.Ed 54.Sh DESCRIPTION 55The 56.Nm 57driver provides support for the WinChipHead CH341/CH340 USB-to-RS-232 58Bridge chip. 59.Pp 60The device is accessed through the 61.Xr ucom 4 62driver which makes it behave like a 63.Xr tty 4 . 64.Sh HARDWARE 65The 66.Nm 67driver supports the following adapters: 68.Pp 69.Bl -bullet -compact 70.It 71HL USB-RS232 72.El 73.Sh SEE ALSO 74.Xr tty 4 , 75.Xr ucom 4 , 76.Xr usb 4 77.Sh HISTORY 78The 79.Nm 80driver first appeared in 81.Nx 5.0 82and was imported into 83.Dx 1.11 . 84The first 85.Fx 86release to include it was 87.Fx 8.0 . 88.Sh BUGS 89Actually, this chip seems unable to drive other than 8 data bits and 901 stop bit line. 91