Chief Delphi - Large Lookup Tables

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Mr. Lim

29-01-2004 23:51

Large Lookup Tables

I have a few look up tables I'm trying to define, and am running into problems with the C18 Linker.

The error I am getting is that the section I am loading these tables into is not big enough =/. Has anyone else used linker directives to get their large lookup tables to reside in a larger portion of memory? The table I am declaring is similar to this:

static const unsigned char mytable[256] = {

[mydata]

};

From what I've read so far, I need a #pragma linker directive to get this thing to go into a nice big chunk of program ROM.

Thanks in advance for the help!

-Shawn...

deltacoder1020

29-01-2004 23:56

Re: Large Lookup Tables

try using the "rom" keyword in the variable definition - this allows you to place constant data in the PIC's rom, which is 32k - easily enough to store a very large lookup table or two.

i.e.

Code:

const rom unsigned char mytable[256] = {



[mydata]



};

Mr. Lim

30-01-2004 00:27

Re: Large Lookup Tables

Thanks a bundle!

Kevin Karan

31-01-2004 01:10

Re: Large Lookup Tables

thanks delta, I was having the exact same problem!

Zee	16-02-2004 20:16

Re: Large Lookup Tables

Does this work with an EDU-bot?

deltacoder1020

16-02-2004 21:30

Re: Large Lookup Tables

it should, unless for some reason they neglected to include any rom....

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