hey guys, i'm new with vhdl and i have to write the following programm, and i need help.
1.To detect number of car.
2.output s is the current number of car.
3.output a is the previous number of car.
4.to load the the previous number of car into the system when an active-low load input is activated.
5.led to light when 64 cars is detected.
I have problem on the load part so i hope u guys can enlighten me. below are some parts i have done. Thanks:)
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity project is
port ( sensor : in std_logic;
reset : in std_logic;
load : in bit;
s : out std_logic_vector (5 downto 0); --current number
a : out std_logic_vector (5 downto 0); -- previous number
led_on : out bit);
end project;
architecture flow of project is
signal count_sig: unsigned (5 downto 0);
begin
process (sensor, reset, load)
begin
if (reset='1') then
count_sig <= "000000";
elsif rising_edge (sensor) then
count_sig <= count_sig+1;
end if;
end process;
s <= std_logic_vector (count_sig);
end flow;
