NAME
gpioow
- 1-Wire bus bit-banging through GPIO pin
SYNOPSIS
gpioow* at gpio? offset 0 mask 0x1
onewire* at gpioow?
DESCRIPTION
The
gpioow
driver allows bit-banging a 1-Wire bus as a master using one GPIO pin.
The pin is used as a data signal.
The GPIO pin must be able to drive an output and read an input.
The pin number is specified in the kernel configuration with the
offset
locator.
The
mask
locator should always be 0x1.
SEE ALSO
gpio(4),
intro(4),
onewire(4)
HISTORY
The
gpioow
driver first appeared in
OpenBSD4.0
and
NetBSD4.0.
AUTHORS
The
gpioow
driver was written by
Alexander Yurchenko <grange@openbsd.org>
and was ported to
NetBSD
by
Jeff Rizzo <riz@NetBSD.org>.