gpioow4
1-wire bus bit-banging through gpio pin
Usage
gpioow* at gpio? offset 0 mask 0x1 gpioow* at gpio? onewire* at gpioow?
Overview
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 can be specified in the kernel configuration with the offset locator. The mask locator should always be 0x1 in this case. The offset and mask can also be specified when gpioow is attached at runtime using the GPIOATTACH ioctl(2) on the gpio(4) device.
Releases
42 releases since OpenBSD 4.0; the text changed 3 times.