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Initializing multidimensional array

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verylsi

verylsi

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Hello All,

I am little confused with initializing multidimensional array..

If I need to initialize all values to '0' then in that case, I know that - (others=> (others=>'0') will work for me.

But I need to initialize 4 th element with "11111111" and rest all with "00000000" .


Then in this case, what should I do?

I tried -
signal tmp_ram: ram_type := ( (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), ("11111111"), (others=>'0'), (others=>'0'), (others=>'0')) ;

but there must be a better way to do it.

Thanks
 
Last edited:

verylsi said:
Hello All,

I am little confused with initializing multidimensional array..

If I need to initialize all values to '0' then in that case, I know that - (others=> (others=>'0') will work for me.

But I need to initialize 4 th element with "11111111" and rest all with "00000000" .


Then in this case, what should I do?

I tried -
signal tmp_ram: ram_type := ( (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), (others=>'0'), ("11111111"), (others=>'0'), (others=>'0'), (others=>'0')) ;

but there must be a better way to do it.

Thanks
Click to expand...

Here is one way:
signal tmp_ram: ram_type := (4 => (others => '1'), others => (others => '0')); -- I think this compiles correctly

Here is another way, you can decide if it is 'better' or just different. It's wordier than the previous method or other methods that will no doubt be proposed, but it is abundandly clear to the average reader how things are set...that has value as well.

function Init_Ram return ram_type is
variable RetVal: ram_type;
begin
RetVal := (others=> (others=>'0'));
RetVal(4) := (others => '1');
return(RetVal);
end function Init_Ram;
signal tmp_ram: ram_type := Init_Ram;

Kevin Jennings
 
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