How to fill (initialize) large ROM memories?

[riiete]

Hi!

How can I fill large ROM memories in VHDL? Writing all values by hand seems quite a robust if large memory has to be intialized:

constant ROM: rom_array := (
"001010", "011010", "010111",
...
... --thousands of numbers
);

For example if values of a sin fuction needs to be initialized into a ROM, can I use some loop structure to calculate and initialize the values? Few tries has produced nothing but errors..

-Riika-

 

[VHDLguy]

Write a function that returns the same type as your constant
(rom_array). Then initialise your constant with a call to the function.

The function will then have your algorithm to create your table.

--

http://www.lateralsands.com/

 

[riiete]

The problem is solved. Thanks!