7747 spd limit first, trip timers next?

[Mike Rolica]

Sorta been playing with the extra space avalable on the 256k prom.  Trying
to get a mini program that uses the vss, calculates from it when ¼ mile has
gone by ie 500 pulses and at the 500th pulse calculate the speed.  Going to
add .500s delay  and a timer.  Out one of the spare unused outputs of the
ecm I plan to feed a led display displaying time, (et) and mph.  The memory
is in the display (for speed and time) and will have a siple reset button.
Have to give credit to bruce as I got the idea from his et est he built.
I'm just trying to create some code so all you have is a simple display with
resetable mem...... have not quite figured out how to make the
display....Any ideas? Need memory and 2- 5 digit displays

Btw: picked up a book by tap publishers in Chapters,  "Understanding and
programming Motorola microcontrolers"  Talks about derivatives of 68oo
series used in vehicles and their differences!  Has a couple of
assemblers/disassembler programs included on a CD that comes with the book.
Also was one by the same publisher on the PIC microcontroller?????
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


	-----Original Message-----
	From:	Mika Helander [SMTP:mika_helander at hotmail.com]
	Sent:	Wednesday, December 08, 1999 10:08 AM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	7747 spd limit first, trip timers next?

	So BobR posted code to add speed limiter to 7747. Now i'm wondering
if 
	anyone has made anything to record, say, 1/4ml , 0 to 100km/h etc
times?

	The idea in code is to see that vechile is not moving, reset all
counters in 
	RAM, and when "launched" start calculating pulses per mile or
verifying 
	current speed and record time or passed count of 12.5ms to reach
treshold. 
	Then ALDL dumping is modified to include those counter ram
locations.

	Any ideas?

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