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.Dd April 26, 2017 31.Dt UCHCOM 4 32.Os 33.Sh NAME 34.Nm uchcom 35.Nd WinChipHead CH341/CH340 serial adapter driver 36.Sh SYNOPSIS 37To compile this driver into the kernel, 38place the following lines in your 39kernel configuration file: 40.Bd -ragged -offset indent 41.Cd "device usb" 42.Cd "device ucom" 43.Cd "device uchcom" 44.Ed 45.Pp 46Alternatively, to load the driver as a 47module at boot time, place the following line in 48.Xr loader.conf 5 : 49.Bd -literal -offset indent 50uchcom_load="YES" 51.Ed 52.Sh DESCRIPTION 53The 54.Nm 55driver provides support for the WinChipHead CH341/CH340 USB-to-RS-232 56Bridge chip. 57.Pp 58The device is accessed through the 59.Xr ucom 4 60driver which makes it behave like a 61.Xr tty 4 . 62.Sh HARDWARE 63The 64.Nm 65driver supports the following adapters: 66.Pp 67.Bl -bullet -compact 68.It 69HL USB-RS232 70.El 71.Sh FILES 72.Bl -tag -width "/dev/ttyU*.init" -compact 73.It Pa /dev/ttyU* 74for callin ports 75.It Pa /dev/ttyU*.init 76.It Pa /dev/ttyU*.lock 77corresponding callin initial-state and lock-state devices 78.Pp 79.It Pa /dev/cuaU* 80for callout ports 81.It Pa /dev/cuaU*.init 82.It Pa /dev/cuaU*.lock 83corresponding callout initial-state and lock-state devices 84.El 85.Sh SEE ALSO 86.Xr tty 4 , 87.Xr ucom 4 , 88.Xr usb 4 89.Sh HISTORY 90The 91.Nm 92driver first appeared in 93.Nx . 94The first 95.Fx 96release to include it was 97.Fx 8.0 . 98.Sh BUGS 99Actually, this chip seems unable to drive other than 8 data bits and 1001 stop bit line. 101