The generic of entity is not found, Warning Code: (vsim-8713)

Altera_Forum · ‎03-28-2017

Hello Folks:

I'm a newbie on VHDL as well as Quartus II.

In the practice, I trying to build a module which controls LED blinking frequency by generic input from upper entity.

However, it looks like the generic value can not actually be passed into the target instance.

When I inspect the command log there's a warning message show:

https://alteraforum.com/forum/attachment.php?attachmentid=13428&stc=1

But I'm pretty sure the entity has generic part, which confused my for almost a week.

And later I go to check *.vho file that generated by Quartus II after compilation, the generic part is missing.

https://alteraforum.com/forum/attachment.php?attachmentid=13429&stc=1

So far I have no any idea to handle this problem, is there experienced coder can help me? Deeply appreciated.

The source code and testbench of my project are:

led_blink


library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
--Entity declaration
entity led_blink is 
generic
(
i_ClkDiv    :    integer :=10
);
port
(
i_Clk    :    in    std_logic;    --    reference clock for LED
i_Enable :    in std_logic;    --    1= enable LED
i_nRST    :    in std_logic;    --    reset signal, active low
o_LedDrive : out std_logic    -- signal line to control LED
);    
end led_blink;
--Architecture
architecture arc_led of led_blink is
--These signals will be counters
signal loop_cnt : natural; 
-- These signals will toggle at the frequencies needed
signal led_signal : std_logic := '0';
begin
MainProcess:    process(i_Clk) is
begin
if    rising_edge(i_Clk) then
if    loop_cnt = i_ClkDiv-1 then -- -1, since counter starts at 0
led_signal <= not    led_signal;
loop_cnt    <= 0;
else
loop_cnt    <=    loop_cnt + 1;
end if;
end if;
end process MainProcess;
-- Only allow o_LedDrive to drive when i_Enable is high (and gate).
o_LedDrive <= led_signal and i_Enable;
end arc_led;

Testbench


library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity tb_led_blink is
end tb_led_blink;
architecture behave of tb_led_blink is
-- 48 MHz = 20.833 nanoseconds period
constant c_CLOCK_PERIOD : time := 100    ns;
signal    r_CLOCK : std_logic    := '0';    --    reference clock for LED
signal    r_ENABLE    : std_logic    := '1';    --    1= enable LED
signal    r_NRST    : std_logic    := '1';    --    reset signal
signal    r_ClkDiv    :    integer    := 2;
signal    w_LED_DRIVE : std_logic; 
-- Component declaration for the Unit Under Test (UUT)
component led_blink is
generic
(
i_ClkDiv    :    integer :=10
);
port 
(
i_Clk : in std_logic;
i_Enable : in std_logic;
i_nRST    : in std_logic;
o_LedDrive    : out std_logic
);
end component led_blink;
begin
-- Instantiate the Unit Under Test (UUT)
UUT : led_blink
generic map
(
i_ClkDiv    =>5
)
port map 
(
i_Clk => r_CLOCK,
i_Enable => r_ENABLE,
i_nRST => r_NRST,
o_LedDrive => w_LED_DRIVE
);
--Process to generate clock
p_CLK_GEN : process is
begin
wait for c_CLOCK_PERIOD/2;
r_CLOCK <= not r_CLOCK;
end process p_CLK_GEN; 
end behave;

Altera_Forum · ‎03-28-2017

vho not containing generic is no surprise to me. try use vhd of your entity. I never used vho for simulation