At 12:12 PM 5/30/2003 +0200, you wrote:
> > 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:

Yes, the parsing could be done off-line on a PC and a simulated stack
machine could be coded on the PIC using bytecodes/tokens stored in the
EEPROM. I've done this (not with a PIC, but it's no different).

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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