我使用代码 VHDL 通过 System Generator 的“黑匣子”在 Simulink 中制作一次性计时器。该模块得出的输入是:clk、en、触发器、延迟和输出是:pluse。现在我想使用 System Generator 在 Zynq 7020 上实现并使用时钟频率 = 1.562Mhz。我读了“ug897-vivado-system generator-user”,但我仍然不知道如何配置 clk。
Matlab/Simulink 中的图表
一次性定时器/黑盒的 VHDL 代码
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
library UNISIM;
use UNISIM.VComponents.all;
entity oneshot is
port ( clk : in STD_LOGIC;
ce : in STD_LOGIC;
trigger : in STD_LOGIC:='0';
delay : in STD_LOGIC_VECTOR (7 downto 0);
pulse : out STD_LOGIC :='0');
end oneshot;
architecture Behavioral of oneshot is
signal count: INTEGER range 0 to 255; -- count variable
signal bus_rising_edge : boolean;
signal input_sync : std_logic_vector(0 to 2);
begin
input_syncronizer : process(clk) begin
if rising_edge(clk) then
input_sync <= to_x01(trigger)&input_sync(0 to 1);
end if;
end process ;
bus_rising_edge <= input_sync(0 to 1) = "10";
trigger_process: process (clk)
begin
-- wait for trigger leading edge
if rising_edge(clk) then
if bus_rising_edge then
pulse <= '1';
count <= to_integer(unsigned(delay));
elsif count > 1 then
pulse <= '1';
count <= count - 1;
else
pulse <= '0';
end if;
end if;
end process;
end Behavioral;
Matlab 代码在导入 VHDL 代码时自动创建 https://drive.google.com/open?id=1jfztL-NgftDc7VAgAX4eHfuJF8uOgK3V
(对不起,我无法正确发布我的代码)