ALDL Updates was DIY-WB Output Voltage Scaling

[Shannen Durphey]

Mind spending a little time to talk about this? 

Fer instance, what's a kernal scheduler?
Shannen

rr wrote:
> 
> Actually the ECM doesn't have to worry about this kind of stuff. Everything
> is internally timed to run at certain rates no matter the RPM.  There are two
> minor loops that each run 80 times/sec (fuel & spark). Then there are 16
> major loops that run at 10 times/sec. Then there is the kernal scheduler that
> runs at 160 times/sec.
> 
> The RPM related stuff that controls spark & fuel all runs in hardware. I haven't
> 
> looked at the 8192 buad aldl too closely. However the 160 baud (bps) sends
> a bit at each kernal loop, 160 times/sec.
> 
> BobR.
> 
> Vim Fuego wrote:
> 
> > > The only thing that's fixed is the baud rate (8192 baud) which means you
> > > will never achieve more than 800 or so bytes per second. The mode 1
> > request
> > > string is 5 bytes long, so 10 requests a second accounts for 50 bytes, or
> > > 6% of the bus bandwidth.
> >
> > O.K, but the 'main' job of the ECM is to run the engine right!, so any
> > serial data routines must be lower on the priority scale?, so if the motor
> > is running at say 3,000RPM, how long does the ECM have to service the serial
> > data routine without having to ignore it and get back to it's primary
> > function?. Surely that (as well as number of bytes transmitted) dictates the
> > update rates?.
> >
> > Vim
> >
> > ----------------------------------------------------------------------------
> 
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