QuartusVHDL数字钟代码
时间: 2023-06-12 16:07:41 浏览: 70
以下是一个简单的 VHDL 数字钟代码,使用 Quartus II 开发:
```vhdl
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity clock is
port(
clk: in std_logic;
reset: in std_logic;
hours: out std_logic_vector(3 downto 0);
minutes: out std_logic_vector(5 downto 0);
seconds: out std_logic_vector(5 downto 0)
);
end entity;
architecture Behavioral of clock is
signal cnt: integer range 0 to 1000000 := 0; -- 1 MHz counter
signal sec_cnt: integer range 0 to 59 := 0; -- seconds counter
signal min_cnt: integer range 0 to 59 := 0; -- minutes counter
signal hr_cnt: integer range 0 to 23 := 0; -- hours counter
begin
process(clk, reset)
begin
if (reset = '1') then
cnt <= 0;
sec_cnt <= 0;
min_cnt <= 0;
hr_cnt <= 0;
elsif rising_edge(clk) then
cnt <= cnt + 1;
if (cnt = 1000000) then -- 1 second has passed
cnt <= 0;
sec_cnt <= sec_cnt + 1;
if (sec_cnt = 60) then -- 1 minute has passed
sec_cnt <= 0;
min_cnt <= min_cnt + 1;
if (min_cnt = 60) then -- 1 hour has passed
min_cnt <= 0;
hr_cnt <= hr_cnt + 1;
if (hr_cnt = 24) then -- reset to 0 after 24 hours
hr_cnt <= 0;
end if;
end if;
end if;
end if;
end if;
end process;
-- Convert counters to BCD and output to LEDs
hours <= std_logic_vector(to_bcd(unsigned(hr_cnt)));
minutes <= std_logic_vector(to_bcd(unsigned(min_cnt)));
seconds <= std_logic_vector(to_bcd(unsigned(sec_cnt)));
end architecture;
```
这个代码定义了一个名为 "clock" 的实体,具有输入时钟信号、复位信号和输出小时、分钟和秒的信号。内部使用四个计数器来跟踪时间,并在每个计数器达到相应的最大值时递增下一个计数器。然后,将计数器转换为 BCD 格式并将其输出到时钟的 LED 显示。
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