Looking for something others

[Brad Smallridge]

Hi folks,

How does one write this code cleanly?

if( segment_pointer_count="111111111" ) then
segment_pointer_count <= "000000001"; -- skip zero
else
segment_pointer_count <= segment_pointer_count+1;
end if;


That is, with something that is length independent.

Thanks,

Brad Smallridge
b r a d @ a i v i s i o n . c o m

 

[Tim Hubberstey]

Hi folks,

How does one write this code cleanly?

if( segment_pointer_count="111111111" ) then
segment_pointer_count <= "000000001"; -- skip zero
else
segment_pointer_count <= segment_pointer_count+1;
end if;


That is, with something that is length independent.

Length independent _IF_ segment_pointer_count is 31 bits or less:

use numeric_std.all;
....
signal segment_pointer_count : unsigned(...);
....
if( segment_pointer_count=(2**segment_pointer_count'length)-1 ) then
segment_pointer_count <= 1; -- skip zero
else
segment_pointer_count <= segment_pointer_count+1;
end if;

 

[Nicolas Matringe]

Hello

Hi folks,

How does one write this code cleanly?

if( segment_pointer_count="111111111" ) then
segment_pointer_count <= "000000001"; -- skip zero
else
segment_pointer_count <= segment_pointer_count+1;
end if;

That is, with something that is length independent.

You can write this:

if segment_pointer_count = (segment_pointer_count'range => '1') then
segment_pointer_count <= (0 => '1', others => '0');
else
....

Nicolas

 

[sps]

if( segment_pointer_count= X"FF" ) then
segment_pointer_count <= X"01"; -- skip zero
else
segment_pointer_count <= segment_pointer_count+1;
end if;

 

[Brad Smallridge]

Thanks Nicolas. That seems the best.