用VHDL语言完整地分别用WITH-SELECT语句和CASE语句对以下情况进行数据判断:4为二进制数为0111~1010时,属于数据正常;当数据小于0111或者大于1010时,数据均属于不正常。
时间: 2024-03-13 18:47:38 浏览: 13
以下是使用VHDL语言实现的WITH-SELECT语句和CASE语句对数据进行判断的代码:
使用WITH-SELECT语句:
```vhdl
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity with_select_demo is
end entity;
architecture rtl of with_select_demo is
type binary_data_t is array(0 to 4) of std_logic_vector(3 downto 0);
signal binary_data : binary_data_t := ("0111", "1010", "0101", "0010", "1100");
type data_status_t is array(0 to 4) of string(15 downto 0);
signal data_status : data_status_t;
begin
process(binary_data)
begin
data_status <= (
select listagg(
case
when binary_num between "0111" and "1010" then "数据正常"
else "数据不正常"
end, ', ')
within group(order by binary_num)
from (
select binary_data(idx) as binary_num from integer range 0 to 4
)
);
end process;
end architecture;
```
使用CASE语句:
```vhdl
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity case_demo is
end entity;
architecture rtl of case_demo is
type binary_data_t is array(0 to 4) of std_logic_vector(3 downto 0);
signal binary_data : binary_data_t := ("0111", "1010", "0101", "0010", "1100");
type data_status_t is array(0 to 4) of string(15 downto 0);
signal data_status : data_status_t;
begin
process(binary_data)
begin
for idx in binary_data_t'range loop
case binary_data(idx) is
when "0111" to "1010" => data_status(idx) <= "数据正常";
when others => data_status(idx) <= "数据不正常";
end case;
end loop;
end process;
end architecture;
```