I don't suppose we have any Motorola 6800 assembly language programmers
 on here or do we?
 Well, it's been a while, but I've done it. :)
 Bob W.
--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://roblinstores.com/
 Several people have responded.
 Bob White, Matt Prather, Rick  and Cary.
 I'll establish a consensus.
 I need some one to read this pdf and set the port direction registers
 up for
one A to D in and a PWM out. Also the real time clock should be set to
 8 ms.
Not a trivial task. These chips are getting complicated because they are
putting in a lot of options. Please comment as much as possible.
 MC9RS08KA8RM.pdf
 I'll attach the pdf. Sorry people it is rather large.
--
I usually limit attachments to one meg or less. I'll only send this
 out only
once.
 You can get more help from here but you will have to sign up and log in.



https://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=RS08KA&nodeId=01624684499487
 This will go a long way to help as it is time consuming. I can handle the
actual program. I am going to count the real time 8 ms interrupts and
 squirt
fuel on every other one.  I am aware they overlap intake cycles at
 high RPM.
 Thanks
 Paul Lamar


It's probably going to be the weekend before I can take a look..
 Matt-
OK..  I couldn't help it - I had to take a look at the doc.  Seems
 like a cool chip and a pretty easy to follow doc.  I'd think we can
 come up with something that will work.
Matt-

 Great Matt.

 Paul Lamar


Before anyone gets too far into the 6800 code, don't over look the
Megasquirt  series of boxes.  Lot of time, lots of thought, so with the 5th
(???) Generation the boxes are pretty decent.

http://www.microsquirt.info/

Caveat, for Aircraft there is no built in "limp home" mode in the box (at
least  last time I looked).  Nor is there secondary box.Only commercially
supported box with redundacy built in is Tracy Crooks ECU (real world
aviation).

As to writing code and hardware development these days, I just don't have
the time, nor desire. That is my day job, when I get home I love to fire up
the Meco torch, or Milling machine, and work with metal. Just my way of
relaxing and not burning out with electronics.

Tom W

Too complicated and too hard to maintain due to the size of the program
IMHO. Also over kill for aircraft use. The $5 555 program will fit on the
back of an envelope :)

BTW I have a set of bare PC boards for megasquirt if some body wants them.
Free. Send me a self addressed and stamped envelope and I will mail them to
you.

Paul Lamar



I'd love to have the megasquirt boards if nobody else has claimed them
yet..  I'd like to use them in an old pickup I'm restoring..

How big does the envelope need to be?   :)


Matt-

4 by 6 inches. There are three bare boards. One is a stimulator I think.

Send the envelope to

830 East Santa Maria Street
Suite 303
Santa Paula CA
93060

Paul Lamar