X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type;
        bh=SSZuYUF8TzEwJ1wJhSG7grjB/BwO8mVLddOhLAU0Kdo=;
        b=ppBlibzKO5USOjhcwJ2RjKmXpO+dF1Lhlll7opog4agHuT7Ikm+wPRdmaLOlh1l/k+
         okuyoY6l30IFITw9St2Eb2La4doccnXWGdcTW1hwqee/n5p5LUE0BOJtoB5rMPybEv47
         C9liPSk/CnlBe+wwjW6rpsXatyedDcnQ+vRJKrcCaXsRvfGdMn/1cattmsC9I+PWrG81
         scrlPezBWfoa8leq9UXHSWjU0W6Zughr7tX6BWTVqv1tYu/wAZ0plcoqxaY3J1LYOZxC
         UOQo5RDsUV9bhc97iCbf3CbzuLcePRYw4haBQESjvojuLZPR3xQKMQmGnNMW0hsAIprG
         IrvQ==
MIME-Version: 1.0
In-Reply-To: <5040BF06.9040601@ecosensory.com>
References: <CACwWb3DPSG8YgiTsHnfbQE0uyE7X57wPUG4+6-1+XAObLZ=x2Q AT mail DOT gmail DOT com>
	<5040BF06 DOT 9040601 AT ecosensory DOT com>
Date: Fri, 31 Aug 2012 15:58:34 +0200
Message-ID: <CACwWb3AGf1LTJ75bWFN3zSWbJtXHfCyxebbKF_GDC70=V-fj4g@mail.gmail.com>
Subject: Re: [geda-user] OT scripting inside an MCU
From: Levente <leventelist AT gmail DOT com>
To: geda-user AT delorie DOT com
Content-Type: multipart/alternative; boundary=bcaec51b1b211c9ceb04c8903086
Reply-To: geda-user AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: geda-user AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com
Precedence: bulk

--bcaec51b1b211c9ceb04c8903086
Content-Type: text/plain; charset=ISO-8859-1

I have my own protocol developed. The nodes are on a RS485 bus. A large
system can have multiple RS485 buses.

On the root node there is a RTOS (also my code), but on the sensors and
actor nodes there's only a while(1) loop.

I don't know how to solve the programmability with your approach. Maybe I
wasn't clear enough. I want to change the program at run time as well for
example by writing an SMS to the integrated GSM modem, or editing from a
keypad, etc. I could write code in native C of course, but I don't want to
re-program the root-card each time I want to set new temperature, etc.

It's not just for playing, I want to implement this.

On Fri, Aug 31, 2012 at 3:41 PM, John Griessen <john AT ecosensory DOT com> wrote:

> On 08/31/2012 08:14 AM, Levente wrote:
>
>> I'd like to implement something on the root node, that can read some
>> piece of program from its flash or EEPROM and execute it,
>> like read this temperature sensor, read that humidity sensor, do some
>> math, write to that actor, which turns on a fan.
>>
>
> You could look for projects and find something complicated, but if it's
> just to learn and play with,
> you make a real time control loop of code on every microcontroller, and
> every subroutine it runs comes from that.
> That way, it never gets stuck in a loop.  A response from a non-master
> node can never block anything by the master,
> so a response can just be to set some flag, but other wise initiate
> nothing and
> wait for the master program to read that flag and go into action.
>
> What kind of network communication are you using?
>
> John
>

--bcaec51b1b211c9ceb04c8903086
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

I have my own protocol developed. The nodes are on a RS485 bus. A large sys=
tem can have multiple RS485 buses.<br><br>On the root node there is a RTOS =
(also my code), but on the sensors and actor nodes there&#39;s only a while=
(1) loop.<br>
<br>I don&#39;t know how to solve the programmability with your approach. M=
aybe I wasn&#39;t clear enough. I want to change the program at run time as=
 well for example by writing an SMS to the integrated GSM modem, or editing=
 from a keypad, etc. I could write code in native C of course, but I don&#3=
9;t want to re-program the root-card each time I want to set new temperatur=
e, etc.<br>
<br>It&#39;s not just for playing, I want to implement this.<br><br><div cl=
ass=3D"gmail_quote">On Fri, Aug 31, 2012 at 3:41 PM, John Griessen <span di=
r=3D"ltr">&lt;<a href=3D"mailto:john AT ecosensory DOT com" target=3D"_blank">john=
@ecosensory.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">On 08/31/2012 08:14 AM, Levente wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
I&#39;d like to implement something on the root node, that can read some pi=
ece of program from its flash or EEPROM and execute it,<br>
like read this temperature sensor, read that humidity sensor, do some math,=
 write to that actor, which turns on a fan.<br>
</blockquote>
<br>
You could look for projects and find something complicated, but if it&#39;s=
 just to learn and play with,<br>
you make a real time control loop of code on every microcontroller, and eve=
ry subroutine it runs comes from that.<br>
That way, it never gets stuck in a loop. =A0A response from a non-master no=
de can never block anything by the master,<br>
so a response can just be to set some flag, but other wise initiate nothing=
 and<br>
wait for the master program to read that flag and go into action.<br>
<br>
What kind of network communication are you using?<span class=3D"HOEnZb"><fo=
nt color=3D"#888888"><br>
<br>
John<br>
</font></span></blockquote></div><br>

--bcaec51b1b211c9ceb04c8903086--