[Diy_efi] Microcontroller based Auto Related Projects

[xyz Q]

There's an ARM based Arduino. What would you say about that for a choice?
On Oct 31, 2012 1:22 PM, "Avery Nisbet" <anisbet at gmail.com> wrote:

> 1.  Most of the hack a day projects are by IT/computer sci guys that
> look down on getting their hands dirty with cars. If you look deeply
> at some of the projects they will have really shoty electrical
> engineering in them. Some of them are pure hacks and would not work in
> a production sense.  Some are pretty decent.
>
> 2. Pics from an architecture point of view kinda suck. They were not
> designed for use with stack based compilers(One working register).
> The Motorola stuff was some of the 1st used in the automotive space.
> The architecture lends itself to use with a compiler.  They are
> designed for the harsher automotive environment.  Some will say they
> have nicer hardware peripherals.  I would say some of the peripherals
> were designed specifically for the automotive market. There is also a
> pretty big code base to look at.  Oh and mostly anyone who went to
> school for software or hardware who is older than say 30 was forced to
> learn 6800(68HC11) or 68000 assembly language.  This usually involved
> getting ahold of the purple data books motorola gave away for free
> that were well enough written so you could get your class work or real
> work done. I probably have 2 or 3 copies of the 68HC11 books laying
> around somewhere. This being said there are many other options today
> and I would look to ARM or AVR before I looked at PIC.  ARM is already
> dominating the cheap 32bit market and is pretty easy to pick up. This
> will help in the job search later. AVR's are pretty good for the 8bit
> scene.  GCC supports them and ATMEL makes some automotive environment
> parts.
>
> 3.  Go get yourself an Arduino(or other uC of choice), BIP373(OR GM
> ignition module) and some optoisolators.  Then build a distributor
> and/or crank trigger based ignition system. Then try turning that into
> a full engine management solution using the peak and hold add in board
> by Jbperf. Start researching the mega squirt schematics at the timing
> input(tach) and the ignition output. Build those circuite on a bread
> board and test on a bench. Then move them on to your test engine. It
> could be a lawn mower engine or a V8 monster. Read up on timing
> advance and program the Arduino to do a simple RPM only based timing
> curve.  Then add a MAP and/or TPS sensors and add load as a factor of
> your timing curve.  Then engine temp to add some cold start advantages
> and you have all the sensors needed to do open loop EFI.  After adding
> injectors you could add a wide band O2 sensor such as the LC-1 from
> innovative motor sports or just a heated narrow band for cruze.
>
>
> -Avery
>
>
> On Mon, Oct 29, 2012 at 8:13 PM, xyz Q <xyzqhtc at gmail.com> wrote:
> > Hi, I've been on the list for some time, on and off mainly reading bits,
> > trying to find some interesting ideas. Unfortunately I was 10 years too
> > late, when this forum had been in its prime.
> >
> > So here are my first set of questions that I hope on getting some
> answers,
> > hopefully.
> >
> > 1. Why are there so little auto related uc based projects and ideas out
> > there on the net? Look at hackaday.com, for example. Many projects,
> talented
> > people but all they do is prove a point that some thing can be done. But
> > guess what hardly something is really useful. I may have missed some good
> > worth while so please put them here if you know.
> >
> > 2. If PICs are so popular, why are Motorola MCUs popular with auto
> projects?
> > In terms of features aren't they on the same "level"?
> >
> > 3. The way I see to learn microcontroller based EMS or ignition is to
> look
> > at it piece by piece. Megasquirt is great but it's hard to learn a
> complete
> > system. Aren't there any web sites (I've seen DIYEFI) that have info on
> say
> > ignition control, RPM handling with an MCU or other basic control
> concepts
> > that can form the basis for EMS/Ign. related projects. I'd like to learn
> the
> > basics and if there are specific approaches to this, I'd like to hear
> your
> > side of the story. It would be helpful.
> >
> > Thanks and regards to all on the forum. Some projects here are really
> nice
> > and inspiring.
> >
> > Nik.
> >
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