Re: Using 1-wire on ODROID C2

[Vincent DEFERT <vincent.defert%posteo.net@localhost>]

I found this thread, which is not very encouraging:
http://mail-index.netbsd.org/tech-embed/2021/07/thread1.html

I've created a sys/arch/evbarm/conf/GENERIC64.local  with the following 
lines:

    # 1- Wire support
    gpioow*     at gpio?
    onewire*    at gpioow?

    # 1-Wire devices
    owtemp*     at onewire?            # Temperature sensors

and I'm rebuilding the kernel and modules.

However, once I'll have an owtemp kernel module, I still don't know what 
to do with it. :/
That's where an example would help.
Once I'll have a working device, the man pages related to envsys seem 
clear enough.

On 19/09/2022 23:43, Vincent DEFERT wrote:
> I could use owtemp/envsys, but I can't find any example of use, and no 
> documentation except the man pages.
>
> On 19/09/2022 23:33, Michael van Elst wrote:
> > vincent.defert%posteo.net@localhost (Vincent DEFERT) writes:
> >
> > > There's no /dev/onewire0, and I have no clue as to how is my 
> > > application
> > > is supposed to communicate with the DS18B20 connected to this GPIO 
> > > line.
> > There is no userland interface for onewire(4).
> >
> > So far there are two users of onewire(4):
> >
> > - the owtemp driver for e.g. a DS18B20 which attaches as a sensor to
> >    the envsys framework. You can query the sensor with the envstat 
> > command.
> >
> > - a rudimentary oweeprom driver for e.g. a DS2430, that just dumps 
> > the content
> >    to the console.