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Altera_Forum
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14 years ago

need a help with strange error" left bound of the range must be a constant "

I have got this problem when I synthesize my design on Quartus II but when I use xilinx software its work perfectly the error is that " left bound of the range must be a constant " and it...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

what is the size of r_by_2? if its not a constant, how do you know that both vector sizes are the same?

You could just stick it in a for loop and do it bit by bit. 


for i in 0 to r_by_2-1 loop
  q(i) <= q(i+r_by_2);
  q(i+r_by_2) <= q(i);
end loop;