用quartus生成十进制计数器的代码
时间: 2024-04-29 11:24:23 浏览: 54
以下是使用Quartus生成十进制计数器的VHDL代码:
```vhdl
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity decimal_counter is
Port (
clk : in STD_LOGIC;
reset : in STD_LOGIC;
count : out STD_LOGIC_VECTOR (3 downto 0)
);
end entity;
architecture Behavioral of decimal_counter is
signal temp_count : unsigned(3 downto 0) := (others => '0');
begin
process (clk, reset)
begin
if reset = '1' then
temp_count <= (others => '0');
elsif rising_edge(clk) then
if temp_count = 9 then
temp_count <= (others => '0');
else
temp_count <= temp_count + 1;
end if;
end if;
end process;
count <= std_logic_vector(temp_count);
end architecture;
```
该代码使用一个名为`temp_count`的无符号变量来存储计数器的值。在每个上升沿时,如果`temp_count`的值为9,则将其重置为0。否则,`temp_count`将增加1。最后,`temp_count`被转换为`std_logic_vector`类型并输出到`count`端口。