在chushihua.vhd添加黑盒子属性的代码如下：
component dram IS
port (
addra: IN std_logic_VECTOR(10 downto 0);
addrb: IN std_logic_VECTOR(10 downto 0);
clka: IN std_logic;
clkb: IN std_logic;
dina: IN std_logic_VECTOR(15 downto 0);
dinb: IN std_logic_VECTOR(15 downto 0);
douta: OUT std_logic_VECTOR(15 downto 0);
doutb: OUT std_logic_VECTOR(15 downto 0);
ena: IN std_logic;
enb: IN std_logic;
wea: IN std_logic;
web: IN std_logic);
END component; attribute syn_black_box :boolean;
attribute syn_black_box of dram : component is true;
程序中实例化的代码为： cmem: dram
port map(
clka =>clk,
dina =>"0000000000000000",
addra=>ADDRA,
douta=>DOA,
ena =>ENA,
wea =>'0',
图片附件: 无cmem模块.JPG (2009-12-10 16:52, 19.16 KB) / 下载次数 242