Dear all,
Here is my code for multiplexer. I used a secondary global clock buffer (BUFGS) in the code.
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library ieee;
use ieee.std_logic_1164.all;
entity clock_mux is
port (DATA, SEL : in std_logic;
SLOW_CLOCK, FAST_CLOCK : in std_logic;
DOUT : out std_logic);
end clock_mux;
architecture XILINX of clock_mux is
signal CLOCK : std_logic;
signal CLOCK_GBUF : std_logic;
component BUFGS
port (I : in std_logic;
O : out std_logic);
end component;
begin
Clock_MUX : process (SEL)
begin
if (SEL = '1') then
CLOCK<= FAST_CLOCK;
else
CLOCK<= SLOW_CLOCK;
end if;
end process;
GBUF_FOR_MUX_CLOCK : BUFGS
port map (I=> CLOCK, O=> CLOCK_GBUF);
Data_Path : process (CLOCK_GBUF, DATA)
begin
if (CLOCK_GBUF'event and CLOCK_GBUF = '1') then
DOUT<= DATA;
end if;
end process;
end XILINX;
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But the error occurred after compile the code:
Error: Node instance "GBUF_FOR_MUX_CLOCK" instantiates undefined entity "BUFGS"
As i know, we need to instantiate the BUFGS by using the Insert Pads command. However, i do not clear about the Insert Pads command. Can anyone help me please.
Many thanks
