UMCS(4) FreeBSD Kernel Interfaces Manual UMCS(4)
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:
o ST Lab U-360 two-port serial USB adapter
o 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 <
[email protected]>.
BUGS
This driver doesn't support access to any fine tunes of chip, like
RS522/RS485 mode, non-standard baudrates, etc.
FreeBSD 14.1-RELEASE-p8 April 26, 2017 FreeBSD 14.1-RELEASE-p8