[Diy_efi] Data Logger CPU schematic and C for review

[Adam Wade]

--- Ian Molton <spyro at f2s.com> wrote:

> Yup. loads of PWM outputs and ADC inputs (6 and 8
> reespectively), I2C, 2x serial, 512/32K of
flash/RAM,
> and a RTC! core clock 60MHz.

You may want to consider a CAN bus port, now or in the
future.  OBD III is going to run CAN bus for all I/O,
mandatory, which means code pullers will all switch to
CAN, and that is very likely going to be the main data
bus of choice for most OEs on OBD III-compliant
hardware; if someone wanted to make the open-source
ECU interface with the rest of the electronics in
their car, it would limit the possibilities (although
I suppose it would not be difficult to get a CAN node
controller and wire it into an usused I/O port --
there may well be CAN node controllers that interface
via I2C).  Correction: 
http://iram.fr/IRAMFR/TA/computer/canI2C.pdf

Looks like it's more of a PITA than I'd thought.

Something to consider...

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