用vhdl写一段输出为二进制数的十进制计时器代码
时间: 2024-03-07 18:48:01 浏览: 32
以下是一个输出为二进制数的十进制计时器的VHDL代码示例:
```
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity decimal_timer is
Port ( CLK : in STD_LOGIC;
RST : in STD_LOGIC;
COUNT : out STD_LOGIC_VECTOR(31 downto 0));
end decimal_timer;
architecture Behavioral of decimal_timer is
signal counter : INTEGER range 0 to 999999999 := 0;
begin
process(CLK, RST)
begin
if (RST = '1') then
counter <= 0;
elsif rising_edge(CLK) then
if (counter = 999999999) then
counter <= 0;
else
counter <= counter + 1;
end if;
end if;
end process;
COUNT <= std_logic_vector(to_unsigned(counter, 32));
end Behavioral;
```
这个计时器与之前的计时器非常相似,但是输出端口COUNT输出为一个32位的二进制数。在进程中,计数器的当前值被转换为32位无符号整数,然后转换为STD_LOGIC_VECTOR类型以便输出。