Intro to microcontrollers (long)

[Ward]

On Wed, 26 May 1999 22:24:25 -0500 (CDT), Roger Heflin wrote:

> 
> 
> On Wed, 26 May 1999, TK wrote:
> 
> > What I tell everyone is that the program is not really of importance.
The
> > tables are the important part. Even the most rabid of us GM ECM hackers
> > don't change the program code, only the data tables. It's interesting to
see
> > how GM goes about using the data in the program, but it's easy to get
side
> > tracked on the program.
> > 
> > Data tables. Layout, inter-relationship, etc.
> > 
> > Terry Kelley
> 
> 
> I must be seriously rabid then.  I have so far changed the code in 3
> major ways.   I adjusted some of the way the int's and blm's worked on
> my ECM.   On mine when the BLM was adjusted the int was not adjusted,
> I changed things so that when the BLM was adjusted the int was changed
> by an appropiate amount to maintain constant mixture.  This has
> appeared to make the car run better with the VE being off since the
> fuel mixture gets to the right point much faster with less
> oscillation. 
> 
> I also rigged the fuel curves to be per gear, I don't know if that has
> actually helped any performance, and I added some code to lock the TCC
> at the top of second gear (and unlock it at the bottom of 3rd).
> 
> So far adding code was not that hard.  I have only had 1 revision of
> code that actually caused the computer to watchdog reset, and since
> then I have been much more careful checking things.
> 
> 			Roger
> 
Way to go Rodger,
Ive found several useful ways to mod the algo also, particularly when
dealing with a custom application, The late modes stuff has extra A/D ch's
that are very usefull for adding data to the diagnostic string etc.







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