ULPT(4) | Device Drivers Manual | ULPT(4)

# NAME

`ulpt` —
USB printer support

# SYNOPSIS

`ulpt* at uhub?`

# DESCRIPTION

The `ulpt` driver provides support for Universal Serial Bus (USB) printers that follow either the USB printer uni-directional or bi-directional protocol.

Additional bits OR-ed in the minor device number with the unit number select various features of the driver:

Minor Bit | Function
0x40 | Do not initialize (reset) the device on the port.

Some printers cannot handle the reset on open; in case of problems try the ulpn device.

# FILES

/dev/ulpt?
  USB printer with reset on open
/dev/ulpn?
  USB printer without reset on open

# SEE ALSO

lpt(4), usb(4)

USB Device Class Definition for Printing Devices, USB Implementors Forum, http://www.usb.org/developers/devclass_docs/usbprint11.pdf, January 2000.

# HISTORY

The `ulpt` driver appeared in NetBSD 1.4.

May 16, 2009 | NetBSD 9.0