Error (10482): VHDL error : object "count" is used but not declared

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
use ieee.numeric_std.all;

entity ledwithcounter is

port( GPIO_0 : in std_logic_vector(1 downto 0);
ld_enb : in std_logic;--parallel load enable,active high
clk : in std_logic;-- system clock
cnt_enb : in std_logic;--count enable, active high
rst_n : in std_logic;-- reset,active high
cnt_out : out std_logic_vector(1 downto 0);
q : out std_logic_vector(1 downto 0));
end ledwithcounter ;

architecture bufferwithGpio_arc of ledwithcounter is
begin
process(GPIO_0)
begin
if (GPIO_0(0)='1') then q<=GPIO_0(1 downto 0);
else q<= "00";
end if;
end process;


counterrocess(clk,rst_n)
begin

if ( rst_n='0' ) then
count <=(others=>'0');
elsif(clk'event and Clk ='1')then
if (ld_enb='1')then
count<=GPIO_0;
elsif(cnt_enb ='1')then
count <=count+1;
end if;
end if;
end process counter;
-- assigment ouput
cnt_out <= count;

end bufferwithGpio_arc;

What part of 'object "count" is used but not declared' do you fail to comprehend? You have to declare "count" somewhere before you use it in that "counterrocess" process.

Re: Error (10482): VHDL error : object &quot;count&quot; is used but not declared

also, you cannot use std_logic_arith along with numeric_std as they have conflicts. You need to delete std_logic_arith.

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also, you cannot use std_logic_arith along with numeric_std as they have conflicts. You need to delete std_logic_arith.