48 bit data type

[M0KHZ]

I’m thinking about starting an application that requires a 48 bit word
to be calculated (FTW), the calc is straight forward,

FTW = (2 raised to the power of 48 * (DDS_out/DDS_Clock)).

Is this feasible to do with PCH compiler and a PIC18Fxxx, or should I
jump in and purchase the PCD compiler and use a PIC24xxx,
as type int48 data type is available?

Suggestions welcome.

Kevin – M0KHZ

[SherpaDoug]

If that one function is all you need the 48 bit type for, I would create a 48 bit structure and write 8 bit functions to manipulate it. It looks like PCD still has problems of its own, and I would not use it for a paying job unless I really needed to.
_________________
The search for better is endless. Instead simply find very good and get the job done.

[Ttelmah]

A while ago, I did post some basic 48bit arithmetic routines. A search should find them.

Best Wishes

[M0KHZ]

Thanks guys, you've given me loads to sleep on, I don't think a new compiler is the answer here

Kevin - M0KHZ