賽靈思ISE： <vga> 沒有聲明

Question

我正在為vga控制器編寫代碼，並且在頂級模塊Xilinx ISE中出現此錯誤：

<vga>未聲明

當我將端口映射到頂部模塊時

碼

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity vga_controller is
port(mclk : in std_logic;
button: in std_logic;
hs: out std_logic;
vs: out std_logic;
red: out std_logic_vector (3 downto 0);
green: out std_logic_vector (3 downto 0);
blue: out std_logic_vector (3 downto 0)
);
end vga_controller;

architecture vga_controller of vga_controller is
signal clk25,clr,video :std_logic;
signal hc,vc:std_logic_vector (9 downto 0);
begin
clr<=button;
M2: vga
port map (clk25,button,hs,vs,hc,vc,video);
M3: vga_plotter
port map(hc,vc,video,red,green,blue);
end vga_controller;

Answer 1

您沒有VGA組件的組件聲明。