Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

multiplexed display system

Dear Friends, I am designing a multiplexed display system, I did the code without (as I think) errors but I got a syntax error messages as follows: library IEEE; use ieee.std_logic_1164.all...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

You still haven't changed the "else if" to "elsif".

With "else if", you in fact have two nested ifs in your code, that would require two "end if;" to properly close them.

Using identation with tabs can show this:
process (rst, slow_clk)
  if rst = '1' then
    count_2b <= "00";
  else
    if rising_edge(slow_clk) then
      count_2b <= count_2b +1;
    end if;
  end if;
end process;
or
process (rst, slow_clk)
  if rst = '1' then
    count_2b <= "00";
  elsif rising_edge(slow_clk) then
    count_2b <= count_2b +1;
  end if;
end process;