hello everyone, i am newbie in quartus2, an d I am trying to write a 2 digit bcdcounter, but i facing some error
line 27 :Error 10327: Can't determine definition of operator ""=""
the following is the code
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
entity bcdcounter1 is
port(
RST : in std_logic;
Digit1_0 : out unsigned(3 downto 0);
Digit10_0 : out unsigned(3 downto 0);
SW1 : in std_logic;
clk : in std_logic
);
end bcdcounter1;
architecture bcdcounter1_arch of bcdcounter1 is
signal Digit1 : unsigned(3 downto 0);
signal Digit2 : unsigned(3 downto 0);
begin
--BCD up counter
process(clk, RST)
begin
if RST = '0' then
Digit1 <= (others => '0');
Digit2 <= (others => '0');
elsif rising_edge(clk) then
if (SW1 = '1') then
if (digit1 = '8') then if Digit2 < 9 then
Digit2 <= Digit2 + 1;
Digit1 <= (others => '0');
else
Digit1 <= (others => '0');
Digit2 <= (others => '0');
end if;
else
Digit1 <= (others => '0');
end if;
else
if Digit1 < 9 then
Digit1 <= Digit1+1;
else
Digit1 <= (others => '0');
end if;
end if;
end if;
end process;
Digit1_0 <= Digit1;
Digit10_0 <= Digit2;
end bcdcounter1_arch;
