Question

EDA中用VHDL语言设计五人抢答器

要求：1.电路设置有5个抢答按钮A～E，开始抢答控制按钮Start，以及复位按钮RST

2.抢答前或复位时数码管显示为“0”，抢答完成后则显示抢答者的编号“1”～“5”
（哪位知道怎么写的大哥帮我写哈程序啊~~谢谢了）

Answer 1

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_ARITH.all;
use ieee.std_logic_UNSIGNED.all;
ENTITY BIAOJUE IS
PORT(
FF:IN STD_LOGIC_VECTOR(1 TO 5);

QQ:OUT BIT;

QALL:OUT STD_LOGIC_VECTOR(3 DOWNTO 1);

SHIJIAN:BUFFER STD_LOGIC_VECTOR(3 DOWNTO 0);

FUWEI,KAISHI,CLK:IN STD_LOGIC);
END BIAOJUE;
ARCHITECTURE FUNG OF BIAOJUE IS
BEGIN

PROCESS(FF,CLK,KAISHI,FUWEI)

VARIABLE SUO:BOOLEAN;

VARIABLE SUM:STD_LOGIC_VECTOR(1 TO 3);

BEGIN

IF (FUWEI='0') THEN

QQ<='0';

SHIJIAN<="1010";

SUO:=FALSE;

SUM:="000";

QALL<="000";

ELSIF (CLK'EVENT AND CLK='1') THEN

IF (KAISHI='1') THEN

IF (NOT SUO) THEN

IF SHIJIAN="0000" THEN

SUO:=TRUE;

FOR N IN 1 TO 5 LOOP

SUM:=FF(N)+SUM;

END LOOP;

ELSE

SHIJIAN<=SHIJIAN-1;

END IF;

END IF;

QALL<=SUM;

IF (SUM >= 3) THEN

QQ<='1';

ELSE

QQ<='0';

END IF;

END IF;

END IF;
END PROCESS;
END FUNG;