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NetBSD 6.1.5 - man page for gpioow (netbsd section 4)

GPIOOW(4)			   BSD Kernel Interfaces Manual 			GPIOOW(4)

NAME
     gpioow -- 1-Wire bus bit-banging through GPIO pin

SYNOPSIS
     gpioow* at gpio? offset 0 mask 0x1
     gpioow* at gpio?
     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.  The offset and mask can also be specified when gpioow is
     attached at runtime using the GPIOATTACH ioctl(2) on the gpio(4) device.

SEE ALSO
     gpio(4), intro(4), onewire(4)

HISTORY
     The gpioow driver first appeared in OpenBSD 4.0 and NetBSD 4.0.

AUTHORS
     The gpioow driver was written by Alexander Yurchenko <grange@openbsd.org> and was ported to
     NetBSD by Jeff Rizzo <riz@NetBSD.org>.

BSD					  July 19, 2009 				      BSD


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