NAME

       umcs — USB support for serial adapters based on the MCS7820 and MCS7840 chips

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device usb
             device ucom
             device umcs

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             umcs_load="YES"

DESCRIPTION

       The  umcs  driver  provides support for various multiport serial adapters based on the MosCom MCS7820 and
       MCS7840 chips.  They are 2- or  4-port  adapters  with  full-featured  16550-compatible  UARTs  and  very
       flexible baud generators.  Also, these chips support RS422/RS485 and IrDA operations.

       The device is accessed through the ucom(4) driver which makes it behave like a tty(4).

       Different ports on device are presented as sub-units, like /dev/ttyU0.1 and /dev/ttyU0.2.

HARDWARE

       The umcs driver was tested on the following adapters:

       •   ST Lab U-360 two-port serial USB adapter
       •   ST Lab U-400 four-port serial USB adapter

FILES

       /dev/ttyU*.*       for callin ports
       /dev/ttyU*.*.init
       /dev/ttyU*.*.lock  corresponding callin initial-state and lock-state devices

       /dev/cuaU*.*       for callout ports
       /dev/cuaU*.*.init
       /dev/cuaU*.*.lock  corresponding callout initial-state and lock-state devices

SEE ALSO

       tty(4), ucom(4), usb(4)

HISTORY

       The umcs driver appeared in ports since December of 2010.

AUTHORS

       The umcs driver was written by Lev Serebryakov <lev@FreeBSD.org>.

BUGS

       This  driver  doesn't  support  access  to  any  fine  tunes of chip, like RS522/RS485 mode, non-standard
       baudrates, etc.

Debian                                           April 26, 2017                                          UMCS(4)