On Thu, Dec 1, 2016 at 10:57 AM, Sebastián Sáez <otra...@gmail.com> wrote:
> Hi Dennis, > > I attach my circuit. It's connected to P9_22 with a pullup 4.7K resistor. > Now I'm trying with BBGW-blank-debian-8.5-seeed-iot-armhf-2016-06-19-4gb > > I try with this module from this tutorial > <http://mkaczanowski.com/one-wire-ds1820-thermometer-with-beaglebone-black-libmicrohttpd/> > : > > /dts-v1/; >> /plugin/; >> >> / { >> compatible = "ti,beaglebone", "ti,beaglebone-black"; >> part-number = "BB-W1"; >> version = "00A0"; >> >> /* state the resources this cape uses */ >> exclusive-use = >> /* the pin header uses */ >> "P9.22", >> /* the hardware IP uses */ >> "gpio0_2"; >> >> 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>; >> }; >> }; >> }; >> }; > > > I notice that the bone_capemgr from /sys/devices/bone_capemgr.9/slots to > /sys/devices/platform/bone_capemgr/slots > > I can't found the w1 kernel module at /sys/bus/w1/devices/DEVICE_ > ID/w1_slave > > > regards, > Sebastián > > You device tree file is wrong. First lets look at this compared to your file: https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-W1-P9.12-00A0.dts#L25-L27 exclusive-use = /* the pin header uses */ "P9.22", /* the hardware IP uses */ "gpio0_2"; should be: exclusive-use = /* the pin header uses */ "P9.22"; The comment is also wrong, but whatever, it shouldn't hurt anything. Second: fragment@1 { target = <&ocp>; __overlay__ { onewire@0 { compatible = "w1-gpio"; pinctrl-names = "default"; pinctrl-0 = <&dallas_w1_pins>; status = "okay"; *gpios = <&gpio1 2 0>;* }; The code in bold is wrong. The gpio bank for this pin is bank0: *gpios = <&gpio0 2 0>; *would be the correct assignment. Lastly, your overlay "compatible" assignment is wrong for your board. It should look like this: https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-W1-P9.12-00A0.dts#L18 -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORoDTN4CKWmFHxROnvNj5yX9DXs3owMYwOnFJrQ8s6yM4g%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
