[Diy_efi] Data Logger CPU schematic and C for review

[Steven P. Donegan]

This is pretty much where I was already going :-)

On Sat, 2007-02-03 at 18:39 -0800, Adam Wade wrote:
> --- "Steven P. Donegan" <steve at donegan.org> wrote:
> 
> > I am already doing RS-232 and LCD output logic in
> > the data logger - we can re-use that stuff with
> > the ARM...
> 
> I actually had a good idea formulate while reading
> this.
> 
> Why not offer source code to make the data logger
> optionally into a smart gauge "package"; you could use
> the separate processor in the data logger to handle
> measuring and displaying data from sensors etc., and
> doing data logging at the same time, and leave the
> processing power of the "main brain" for EFI-related
> tasks.  Would it be reasonable to send data for gauge
> functions through the I2C port?  I know some of them
> today runj much faster than the original standard, so
> it might be feasible to send a sensor "address" byte
> and a sensor reading perhaps two of three times a
> second.  Each sensor would have a data broadcast this
> often.  Does that sound reasonable?  Or you could even
> use the data logger as a "front end"; it inputs all
> your sensor data and then sends it out over the I2C to
> other interested parties, and you don't connect any
> sensors at all directly to the MCU.  And then you
> could have full display and control (perhaps useful
> when debugging, and def. useful when tuning) on the
> dash, while having the actual ECU under the bonnet.
> 
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> 
> 
>  
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