Forum Discussion

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

LEDs in interleaving method

Hello, my name is Mustapa Hussainar and i need help in generating a program that can on and off two or more LEDs in interleaving method. im a beginner in VHDL and FPGA and its important for me to ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

You can do it with a single modified comparator entity: you simply need to add another compare input (b2) and another status output (c2).

Here is a very naive example; modify it according to the desired LED behavior. 


process (q, b1, b2, c1, c2)
 begin
    if (q<= b1)   then 
       c1<='1'  
       c2<='0';
   elsif (q<=b2) then
      c1<='0'  
      c2<='1';
   else
     c1<='0'  
     c2<='0';
   end if;
end process;