Hardware Reference
In-Depth Information
/* state the resources this cape uses */
exclusive
-
use
=
/* the pin header uses */
"P9.20"
,
/* the hardware IP uses */
"gpio0_12"
;
fragment
@
0
{
target
= <&
am33xx_pinmux
>;
__overlay__
{
dallas_w1_pins
:
pinmux_dallas_w1_pins
{
pinctrl
-
single
,
pins
= <
0x150 0x37
>;
};
};
};
fragment
@
1
{
target
= <&
ocp
>;
__overlay__
{
onewire
@
0
{
compatible
=
"w1-gpio"
;
pinctrl
-
names
=
"default"
;
pinctrl
-
0
= <&
dallas_w1_pins
>;
status
=
"okay"
;
gpios
= <&
gpio1
2 0
>;
};
};
};
};
Then run the following commands:
bone#
dtc -O dtb -o BB-W1-00A0.dtbo -b 0 -@ BB-W1-00A0.dts
bone#
cp BB-W1-00A0.dtbo /lib/firmware/
bone#
echo BB-W1 > /sys/devices/bone_capemgr.*/slots
Now run the following command to discover the serial number on your device:
bone#
ls /sys/bus/w1/devices/
28-00000114ef1b 28-00000128197d w1_bus_master1
This shows the serial numbers for all the devices.
