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?
ucom* at uxrcom?
DESCRIPTION
Theucom 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), uark(4), ubsa(4), uchcom(4), uftdi(4), ugensa(4), uhmodem(4), uipaq(4), ukyopon(4), umcs(4), umct(4), umodem(4), uplcom(4), usb(4), uslsa(4), uvisor(4), uvscom(4), uxrcom(4)
HISTORY
The ucom driver appeared in
NetBSD 1.5.