Dear friends
I tried to do a simple program based on counter.
This is the program
library ieee ;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is
generic(n: natural :=2);
port( clock: in std_logic;
clear: in std_logic;
count: in std_logic;
Q: out std_logic_vector(n-1 downto 0)
);
end counter;
architecture behv of counter is
signal Pre_Q: std_logic_vector(n-1 downto 0);
begin
process(clock, count, clear)
begin
if clear = '1' then
Pre_Q <= Pre_Q + Pre_Q;
elsif (clock='1' and clock'event) then
if count = '1' then
Pre_Q <= Pre_Q + 1;
end if;
end if;
end process;
Q <= Pre_Q;
end behv;
When i tried to analyse it using ghdl i'm getting the error msg like this
[ejo...@linuxpoint ~]$ ghdl -a counter.vhdl
counter.vhdl:29:27: no function declarations for operator "+"
counter.vhdl:32:31: no function declarations for operator "+"
ghdl: compilation error
[ejo...@linuxpoint ~]$
Please help me
With regards
Ejofti.
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