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Man Pages


Manual Reference Pages  -  UMCS (4)

NAME

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

CONTENTS

Synopsis
Description
Hardware
See Also
History
Authors
Bugs

SYNOPSIS

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


.Cd device usb
.Cd device ucom
.Cd 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

SEE ALSO

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

HISTORY

The umcs driver appeared in ports since December of 2010.

AUTHORS


.An -nosplit The umcs driver was written by
.An 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.
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