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):
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¶
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.