I am a newbie to Pic's (just got to the interrupts section in the Easy =
Pic'n book) and have thought of a great little project.  I want to make =
a fault reader for my car's ECU.

If the ECU detects a fault (can be simulated by disconnectiong =
something) then it pops the warning light on.  You can then (bit of a =
quick hack) conect an LED accross two of the pins on the diagnostics =
port and short two out and it will flash a code on the LED.

It first flashes 1 2 to let you know it is working, then the fault, say =
2 6 and then 1 2 again.

Trouble is it does this in a rather strange way, in the above example it =
would.

Flash the LED once
Short pause
Flash the LED Twice
Long pause (so the above was "1" then "2" but this should be read as 12)
Flash LED Twice
Short pause
Flash the LED six times
Long pause ( representing "2" then "6" or 26)
and so on.....

I would like to use an F84 with an input from the ECU (from where the =
LED goes) and then a LCD display to show what the fault is (use a lookup =
table here).

Problem is how do I know the difference between the long and short pause =
(so I can stop counting flashes and move to the next digit) AND the big =
how... How do I turn "1" & "2" into 12 (for use in the lookup table)?

Any help or tips from similar projects would be appreciated.

Thanks.

Justin.

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