Re: [9fans] 9phone

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Sounds interesting, Dave!

I don't know about prior work with 9front on iPhone, but 10 years ago
Inferno was ported to Android:

https://defcon.org/images/defcon-20/dc-20-presentations/Floren/DEFCON-20-Fl=
oren-Hellaphone.pdf

/emil

On Mon, Mar 24, 2025 at 6:01=E2=80=AFAM Dave MacFarlane via 9fans <9fans@9f=
ans.net>
wrote:

> Hello all,
>
> I've been working on trying to get a pinephone kernel that can run
> 9front at https://github.com/driusan/9front-A64
>
> I spent some time this weekend on the userspace getting readings off
> the i2c sensors.
>
> I've managed to use /dev/i2c*/ to get data from the:
> 1. Touch panel
> 2. Light/proximity sensor
> 3. Magnetometer
> 4. Accelerometer/gyroscope
>
> and now I want to expose the data in a filesystem before I put it
> online in some other repo.  I've done some looking around but can't
> find any prior art for any of the above sensor types in Plan9.  Does
> anyone know of any?  I'd like to aim for compatibility if they exist.
>
> Assuming they don't, I'm looking for input if anyone has any strong
> opinions on what the interface should look like.
>
> Left to my own devices my plan is:
>
> 1. TouchPanel -- just write to /dev/mousein and treat touches as
>    button 1.  Since it's a userspace driver we can experiment with
>    multitouch later.
> 2. Light/proximity sensor - create a /dev/lightsensor that
>    returns light readings.  A /dev/proximity read returns "close" or
>    "notclose".  No ctl files or scaling.
> 3. Magnetometer - /dev/compass blocks until there's enough
>    data to calibrate.  Reads return 3 values, x y z that are the raw
>    (short int) readings.  /dev/compassctl for calibrating
>    sensitivity/etc.
> 4. Accel/gyroscope - /dev/accel returns 6 readings of the
>    raw (also short) value ax ay az gx gy gz.  /dev/accelctl
>    for customizing sensitivity/etc.
>
> x/y/z aren't the raw sensor orientation, but normalized so that +y is the
> top of the screen, +x is to the right, and +z is towards the back of the
> phone.
>
> I've done the work to read the values but haven't done any work to
> expose it other than printing debugging to stdout, so I'm open to
> suggestions to other interfaces.
>
> - Dave
>
> ------------------------------------------
> 9fans: 9fans
> Permalink:
> https://9fans.topicbox.com/groups/9fans/T4d13b3016d2a2310-Mdce06ae0664328=
023dd4b496
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>

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<div dir=3D"auto">Sounds interesting, Dave!</div><div dir=3D"auto"><br></di=
v><div dir=3D"auto">I don&#39;t know about prior work with 9front on iPhone=
, but 10 years ago Inferno was ported to Android:</div><div dir=3D"auto"><b=
r></div><div dir=3D"auto"><div><a href=3D"https://defcon.org/images/defcon-=
20/dc-20-presentations/Floren/DEFCON-20-Floren-Hellaphone.pdf">https://defc=
on.org/images/defcon-20/dc-20-presentations/Floren/DEFCON-20-Floren-Hellaph=
one.pdf</a></div><div dir=3D"auto"><br></div><div dir=3D"auto">/emil</div><=
br><div class=3D"gmail_quote gmail_quote_container" dir=3D"auto"><div dir=
=3D"ltr" class=3D"gmail_attr">On Mon, Mar 24, 2025 at 6:01=E2=80=AFAM Dave =
MacFarlane via 9fans &lt;<a href=3D"mailto:[email protected]">[email protected]=
</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:=
0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-lef=
t:1ex;border-left-color:rgb(204,204,204)">Hello all,<br>
<br>
I&#39;ve been working on trying to get a pinephone kernel that can run<br>
9front at <a href=3D"https://github.com/driusan/9front-A64" rel=3D"noreferr=
er" target=3D"_blank">https://github.com/driusan/9front-A64</a><br>
<br>
I spent some time this weekend on the userspace getting readings off<br>
the i2c sensors.<br>
<br>
I&#39;ve managed to use /dev/i2c*/ to get data from the:<br>
1. Touch panel<br>
2. Light/proximity sensor<br>
3. Magnetometer<br>
4. Accelerometer/gyroscope<br>
<br>
and now I want to expose the data in a filesystem before I put it<br>
online in some other repo.=C2=A0 I&#39;ve done some looking around but can&=
#39;t<br>
find any prior art for any of the above sensor types in Plan9.=C2=A0 Does<b=
r>
anyone know of any?=C2=A0 I&#39;d like to aim for compatibility if they exi=
st.<br>
<br>
Assuming they don&#39;t, I&#39;m looking for input if anyone has any strong=
<br>
opinions on what the interface should look like.<br>
<br>
Left to my own devices my plan is:<br>
<br>
1. TouchPanel -- just write to /dev/mousein and treat touches as<br>
=C2=A0 =C2=A0button 1.=C2=A0 Since it&#39;s a userspace driver we can exper=
iment with<br>
=C2=A0 =C2=A0multitouch later.<br>
2. Light/proximity sensor - create a /dev/lightsensor that<br>
=C2=A0 =C2=A0returns light readings.=C2=A0 A /dev/proximity read returns &q=
uot;close&quot; or<br>
=C2=A0 =C2=A0&quot;notclose&quot;.=C2=A0 No ctl files or scaling.<br>
3. Magnetometer - /dev/compass blocks until there&#39;s enough<br>
=C2=A0 =C2=A0data to calibrate.=C2=A0 Reads return 3 values, x y z that are=
 the raw<br>
=C2=A0 =C2=A0(short int) readings.=C2=A0 /dev/compassctl for calibrating<br=
>
=C2=A0 =C2=A0sensitivity/etc.<br>
4. Accel/gyroscope - /dev/accel returns 6 readings of the<br>
=C2=A0 =C2=A0raw (also short) value ax ay az gx gy gz.=C2=A0 /dev/accelctl<=
br>
=C2=A0 =C2=A0for customizing sensitivity/etc.<br>
<br>
x/y/z aren&#39;t the raw sensor orientation, but normalized so that +y is t=
he<br>
top of the screen, +x is to the right, and +z is towards the back of the<br=
>
phone.<br>
<br>
I&#39;ve done the work to read the values but haven&#39;t done any work to<=
br>
expose it other than printing debugging to stdout, so I&#39;m open to<br>
suggestions to other interfaces.<br>
<br>
- Dave<br>
<br>
------------------------------------------<br>
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</blockquote></div></div>

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