DS2482OW(4) | Device Drivers Manual | DS2482OW(4) |
ds2482ow
— Driver
for Maxim DS2482-100 and DS2482-800 IC2 to 1-Wire bridge
ds2482ow* at iic? addr 0x18
ds2482ow* at iic? addr 0x19
ds2482ow* at iic? addr 0x1a
ds2482ow* at iic? addr 0x1b
ds2482ow* at iic? addr 0x1c DS2482-800 only
ds2482ow* at iic? addr 0x1d DS2482-800 only
ds2482ow* at iic? addr 0x1e DS2482-800 only
ds2482ow* at iic? addr 0x1f DS2482-800 only
onewire* at ds2482ow?
The ds2482ow
driver provides 1 or 8
onewire(4) busses via an I2C
interface. The ds2482ow
addr
argument selects the address at the
iic(4) bus. The chip generates
all of the needed 1-Wire pulses on its own and provides for the pullup
needed on the 1-Wire data line. The method that the chip uses for pullup can
be changed through sysctl(8)
nodes.
The following sysctl(3) variables are provided:
hw.ds2482ow0.pullup.active
hw.ds2482ow0.pullup.strong
If neither active
pullup or strong pullup are enabled the chip will
hw.ds2482ow0.debug
DS2482_DEBUG
, this
node will appear and can be used to set the debugging level.The ds2482ow
driver first appeared in
NetBSD 11.0.
The ds2482ow
driver was written by
Brad Spencer
<brad@anduin.eldar.org>.
The DS2482 chip supports overdrive speed on a 1-Wire bus. This driver does not support overdrive speed mode.
October 31, 2024 | NetBSD 10.99 |