完善以下BCD计数器代码library IEEE; use IEEE.std_logic_1164.ALL; use IEEE.numeric_std.ALL; --------------------------------------- entity BCD_COUNTER is --------------------------------------- generic ( N : positive := 8 ); -- facteur de division de Tick1ms port ( CLK : in std_logic; RST : in std_logic; TICK1MS : in std_logic; UNITIES : out std_logic_vector(3 downto 0); TENS : out std_logic_vector(3 downto 0); HUNDREDS : out std_logic_vector(3 downto 0); THOUSNDS : out std_logic_vector(3 downto 0)); end entity BCD_COUNTER; --------------------------------------- architecture RTL of BCD_COUNTER is --------------------------------------- signal Count : std_logic_vector(3 downto 0) = '0000' -- On déclare les signaux internes ici begin -- Vous pouvez faire les assignements concurrents ici process(RST,CLK) begin if RST = '1' then -- initialiser tout vos signaux ici elsif rising_edge(CLK) then -- Faites toutes vos actions synchrones ici end if; end process; end architecture RTL;
时间: 2023-08-15 12:17:59 浏览: 54
以下是完善后的代码:
```vhdl
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity BCD_COUNTER is
generic (
N : positive := 8 -- Tick1ms 的除数因子
);
port (
CLK : in std_logic;
RST : in std_logic;
TICK1MS : in std_logic;
UNITIES : out std_logic_vector(3 downto 0);
TENS : out std_logic_vector(3 downto 0);
HUNDREDS : out std_logic_vector(3 downto 0);
THOUSNDS : out std_logic_vector(3 downto 0)
);
end entity BCD_COUNTER;
architecture RTL of BCD_COUNTER is
signal Count : unsigned(15 downto 0) := (others => '0'); -- 16 位无符号计数器
signal TickCnt : unsigned(7 downto 0) := (others => '0'); -- 8 位无符号计数器
signal Tick : std_logic := '0'; -- 用于表示 Ticks 是否已计算
begin
-- 计算 Ticks
process(CLK)
begin
if rising_edge(CLK) then
if TickCnt = (N - 1) then
Tick <= '1';
TickCnt <= (others => '0');
else
Tick <= '0';
TickCnt <= TickCnt + 1;
end if;
end if;
end process;
-- 计数器逻辑
process(RST, CLK)
begin
if RST = '1' then
Count <= (others => '0');
UNITIES <= (others => '0');
TENS <= (others => '0');
HUNDREDS <= (others => '0');
THOUSNDS <= (others => '0');
elsif Tick = '1' then
Count <= Count + 1;
if Count = 10000 then
Count <= (others => '0');
end if;
end if;
end process;
-- BCD 编码
UNITIES <= std_logic_vector(to_bcd(to_integer(unsigned(Count(3 downto 0)))));
TENS <= std_logic_vector(to_bcd(to_integer(unsigned(Count(7 downto 4)))));
HUNDREDS <= std_logic_vector(to_bcd(to_integer(unsigned(Count(11 downto 8)))));
THOUSNDS <= std_logic_vector(to_bcd(to_integer(unsigned(Count(15 downto 12)))));
end architecture RTL;
```
在这个代码中,我们使用了一个 16 位无符号计数器 `Count`,一个 8 位无符号计数器 `TickCnt`,以及一个 `Tick` 信号来计算 Ticks。在每个 Tick 中,我们将 `Count` 加 1,如果计数器达到 10000,则将其重置为0。然后,我们使用 `to_bcd` 函数将 `Count` 转换为 BCD 编码,并将结果分配给输出端口。
请注意,这个代码假定计数器的时钟频率是 Tick1ms 的 N 倍。如果您使用不同的时钟频率或除数因子,您需要相应地调整代码。