April 4, 2006 ONEWIRE 4

### NAME

onewire - 1-Wire bus

### SYNOPSIS

onewire* at gpioow?

option ONEWIREVERBOSE

### DESCRIPTION

1-Wire bus was originally developed by Dallas Semiconductor for connecting integrated circuits. It is commonly used for connecting devices such as electronic keys, EEPROMs, temperature sensors, real-time clocks, security chips, etc.

The onewire driver provides a uniform programming interface layer between 1-Wire master controllers and various 1-Wire slave devices. Each 1-Wire master controller attaches a onewire framework; several slave devices can then be attached to the onewire bus.

The driver supports plugging and unplugging slave devices on the fly.

### SUPPORTED MASTERS

gpioow(4)
  1-Wire bus bit-banging through GPIO pin

### SUPPORTED SLAVES

owid(4)
  ID family type device
owtemp(4)
  temperature family type device

### SEE ALSO

intro(4)

### HISTORY

The onewire driver first appeared in OpenBSD4.0 and NetBSD4.0.

### AUTHORS

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