> You can implement what you want as bytecode in the eeprom and
> a bytecode interpreter that runs in the pic and executes it.
> Eg. for the expression above it would be in byte code
> something like (after correcting the & in the middle to &&
> which is likely what you wanted):
>
> !fetch var1 !fetch var2 !and !sgn !fetch var3 !literal
> 0x0C !sub !sgn !and !if !literal DoSomething !acall !fi
>
> where each word would take one EEPROM cell or more (you can
> compress some of it).

Ok, It sounds cool!
Instead of coding a complex parser it would be a good idea to store in
eeprom some commands like you explained. To do 'If ((Var1 &
Var2)&(Var3<0x0C))' I will store in eeprom something like:

PUSH  Var1
PUSH  Var2
AND
PUSH  Var3
PUSHL 0x0C
<
AND
THEN  DoSomething

I think an interpreter for this kind of commands could be implemented in
a pic18 quite easy.

Thanks!!
Carlos.

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