gpioiic(4) [netbsd man page]

GPIOIIC(4)						   BSD Kernel Interfaces Manual 						GPIOIIC(4)

NAME

     gpioiic -- GPIO I2C controller

SYNOPSIS

     gpioiic* at gpio? offset 0 mask 0x3 flag 0x0
     gpioiic* at gpio?
     iic* at gpioiic?

DESCRIPTION

     The gpioiic driver allows bit-banging an I2C bus as a master using two GPIO pins.	By default the first pin is used as a serial data (SDA)
     signal and the second as a serial clock (SCL).  If the flag locator is set to 0x01, the order of the SDA and SCL signals is reversed.  Both
     GPIO pins must be able to drive an output and the SDA pin must be also able to read an input.

     The pins can be specified in the kernel configuration with the offset and the mask locators.  The offset and mask can also be specified when
     gpioiic is attached at runtime using the GPIOATTACH ioctl(2) on the gpio(4) device.  Each bit in the mask locator defines one pin; the pin
     number is calculated as an addition of the bit position and the offset locator.  For example, offset 17 and mask 0x5 defines pin numbers 17
     and 19.

SEE ALSO

     gpio(4), iic(4), intro(4)

HISTORY

     The gpioiic driver first appeared in OpenBSD 3.9 and NetBSD 5.0.

AUTHORS

     The gpioiic driver was written by Alexander Yurchenko <grange@openbsd.org> and was ported to NetBSD by Marc Balmer <marc@msys.ch>.

CAVEATS

     A gpioiic device can not be detached from the gpio(4) bus at runtime due to the fact that iic(4) busses can not detach once attached.

BSD
								  October 2, 2011							       BSD

GPIOCTL(1)						    BSD General Commands Manual 						GPIOCTL(1)

NAME

     gpioctl -- GPIO control utility

SYNOPSIS

     gpioctl -l [-f ctldev] [-v]
     gpioctl -t [-f ctldev] pin
     gpioctl -c [-f ctldev] pin flag [flag ...]
     gpioctl [-f ctldev] pin [0|1]

DESCRIPTION

     The gpioctl utility could be used to manage GPIO pins from userland and list available pins.

     The options are as follows:

     -c pin flag [flag ...]
		Configure pin by setting provided flags. The following flags are currently defined:

		      IN     Input pin

		      OUT    Output pin

		      OD     Open drain pin

		      PP     Push pull pin

		      TS     Tristate pin

		      PU     Pull-up pin

		      PD     Pull-down pin

		      II     Inverted input pin

		      IO     Inverted output pin

     -f ctldev	GPIO controller device to use If not specified, defaults to /dev/gpioc0

     -l 	list available pins

     -t pin	toggle value of provided pin number

     -v 	be verbose: for each listed pin print current configuration

EXAMPLES

     o	 List pins available on GPIO controller defined by device /dev/gpioc0

	 gpioctl -f /dev/gpioc0 -l

     o	 Set the value of pin 12 to 1

	 gpioctl -f /dev/gpioc0 12 1

     o	 Configure pin 12 to be input pin

	 gpioctl -f /dev/gpioc0 -c 12 IN

SEE ALSO

     gpio(4), gpioiic(4), gpioled(4)

HISTORY

     The gpioctl utility appeared in FreeBSD 9.0.

AUTHORS

     The gpioctl utility and this manual page were written by Oleksandr Tymoshenko <gonzo@freebsd.org>.

BSD
								 November 7, 2013							       BSD