/dev/ttyU*.*
for callin ports
umcs4
Asix/moschip mcs7840/mcs7820 usb to serial uart driver
Usage
device usb device ucom device umcs
In loader.conf(5): umcs_load="YES"
Overview
The umcs driver provides support for various multiport serial adapters based on the ASIX/MosChip MCS7840 and MCS7820 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 supports the following USB to serial UART controllers based on the ASIX/MosChip MCS7840 and MCS7820:
-
ST Lab U-360 two-port serial USB adapter
-
ST Lab U-400 four-port serial USB adapter
Files
-
-
/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
Releases
36 releases since FreeBSD 8.3-RELEASE; the text changed 23 times.