Implementation of VHDL program on FPGA

Question

Hello,

I try to implement a simple vhdl program " if the switch button is ON then the led has to be ON" on FPGA using Quartus but it doesn't work means the switch is ON but the led is still OFF. however, when i implement a block diagram using quartus on FPGA it works !!!. Is there an option which have to be activated on the tools? how can i solve the problem ?

Many thanks

altera_forum · Answer

Its probably an issue in the code/project  why not post the code/project?

altera_forum · Answer

Here is the code :

library ieee;

use ieee.std_logic_1164.all;

use IEEE.STD_LOGIC_ARITH.ALL;

use IEEE.STD_LOGIC_UNSIGNED.ALL;

entity TEST is port (

bouton: in std_logic;

led0: out std_logic ;

led1: out std_logic ;

led2: out std_logic ;

led3: out std_logic

);

end TEST;

architecture behavior of TEST is

begin

process (bouton)

begin

if bouton = '1' then

led0 <= '0';

led1 <= '1';

led2 <= '1';

led3 <= '1';

nd if;

end process;

end behavior;

altera_forum · Answer

You forgot the else to change the state of the leds when the button is in the off state.

altera_forum · Answer

Even with the else it doesnt work.. :(.is there an option which has to be activated on quartus to indicate the type of the transfered program to fpga ?

altera_forum · Answer

have you included the code in the project? have you got a correct pinout? is the code even correct - why not post it rather than just say "it doesnt work".

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Implementation of VHDL program on FPGA

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