NAME
ucom —
USB tty support
SYNOPSIS
ucom* at u3g?
ucom* at uark?
ucom* at ubsa?
ucom* at uchcom?
ucom* at uftdi?
ucom* at ugensa?
ucom* at uhmodem?
ucom* at uipaq?
ucom* at ukyopon?
ucom* at umcs? portno ?
ucom* at umct?
ucom* at umodem?
ucom* at uplcom?
ucom* at uslsa?
ucom* at uvisor? portno ?
ucom* at uvscom?
DESCRIPTION
The
ucom driver attaches to USB modems, serial ports, and
other devices that need to look like a tty. The
ucom driver
shows a behaviour like a
tty(4).
This means that normal programs such as
tip(1) or
pppd(8) can be used to access the
device.
The
portno locator can be used to decide which port to use
for device that have multiple external ports.
Note that while
ucom supports the (undocumented)
pulse-per-second API normally used on conventional serial ports, USB serial
devices typically have a varying latency around 1 ms due to the USB frame
structure.
The ttyXX devices are traditional dial-in devices; the dtyXX devices are used
for dial-out. (See
tty(4).)
FILES
-
-
- /dev/dtyU?
-
- /dev/ttyU?
-
SEE ALSO
tty(4),
u3g(4),
ubsa(4),
uchcom(4),
uftdi(4),
ugensa(4),
uhmodem(4),
uipaq(4),
ukyopon(4),
umct(4),
umodem(4),
uplcom(4),
usb(4),
uslsa(4),
uvisor(4),
uvscom(4)
HISTORY
The
ucom driver appeared in
NetBSD
1.5.