modelsim dont work

skyline121212 Guest #6211995 
the program supposed to count the number of '1' in a given 32bit input

library IEEE;
use IEEE.std_logic_1164.all;

entity one_cnt is
port( serial_bit_input : in std_logic_vector (31 downto 0);
      result            : out  integer range 0 to 32) ;
end;

architecture behave of one_cnt is
signal cnt : integer range  0 to 32;
begin

process(serial_bit_input)
begin

cnt<=0;
  count_loop : for i in 31 downto 0 loop

    if serial_bit_input(i)='1' then
      cnt<=cnt+1;
    end if;

  end loop count_loop;

result<=cnt;
end process;
end architecture;



as you can see :

* Fatal: (vsim-3807) Types do not match between component and entity for 
port "result"

what sould i do?
Attached files:
Reply Quote Edit Move Thread sperren Slow mode Anmeldepflicht aktivieren Anpinnen Delete topic Thread mit anderem zusammenführen Report Thanks
ktorkkelson Guest #6218207 
Hi,

I guess you accidentally compiled the Component template file *.vho 
instead of the source code (typically *.vhd oder *.vhdl).
Your code has only 27 lines of code, but the error was reported on line 
83.

Little hint:
Your design won't work this way. Try the code bellow...

process(serial_bit_input, cnt)
  variable cnt : integer range  0 to 32;
begin

  cnt := 0;
  count_loop : for i in 31 downto 0 loop
    if serial_bit_input(i)='1' then
      cnt := cnt + 1;
    end if;
  end loop count_loop;

  result<=cnt;

end process;
Reply Quote Edit Delete Report Thanks
Watch this topic

Reply

A question of your own? This thread is over 6 years old. Ask it in a thread of its own – more people read along there, and it gets answered more often and sooner.

Start a new thread

A fix, an addition or feedback on this thread? Then reply here.

Formatting
  • [c]C-Code[/c]
  • [vhdl]VHDL-Code[/vhdl]
  • [code]code in other languages, ASCII drawings[/code]
  • [math]formula (LaTeX syntax)[/math]
  • [[Title]] – link to an article
  • Link to another post: right-click its post ID (#8078628), copy the address, paste it into the text

More about formatting

Post long source code as an attachment, not in the text.

Your name and e-mail address

Already registered? Log in

Not shown to anyone. We send you a link; your post appears once you confirm it there.

By submitting you create a free account and accept the terms of use.