解读这段代码PROCESS(DIN1)IS BEGIN IF DIN1(6)='1' THEN BCD<="0110"; ELSIF DIN1(1)='1' THEN BCD<="0001"; ELSIF DIN1(2)='1' THEN BCD<="0010"; ELSIF DIN1(3)='1' THEN BCD<="0011"; ELSIF DIN1(4)='1' THEN BCD<="0100"; ELSIF DIN1(5)='1' THEN BCD<="0101"; ELSIF DIN1(0)='1' THEN BCD<="0000"; ELSIF DIN1(7)='1' THEN BCD<="0111"; ELSIF DIN1(8)='1' THEN BCD<="1000"; ELSIF DIN1(9)='1' THEN BCD<="1001"; ELSE BCD<="0000"; END IF; END PROCESS; KEYOUT<=KEY1; PROCESS(KEY1) IS BEGIN IF RISING_EDGE(KEY1) THEN IF CLEAR='0' AND RE_DIAL1 ='0' THEN --输入数字,实现数字从低位向高位移动 NUMBER(7)<=NUMBER(6); NUMBER(6)<=NUMBER(5); NUMBER(5)<=NUMBER(4); NUMBER(4)<=NUMBER(3); NUMBER(3)<=NUMBER(2); NUMBER(2)<=NUMBER(1); NUMBER(1)<=NUMBER(0); NUMBER(0)<=BCD; ELSIF CLEAR='1' AND RE_DIAL1 ='0' THEN --按下删除键,数字从高位向低位移动 NUMBER(0)<=NUMBER(1); NUMBER(1)<=NUMBER(2); NUMBER(2)<=NUMBER(3); NUMBER(3)<=NUMBER(4); NUMBER(4)<=NUMBER(5); NUMBER(5)<=NUMBER(6); NUMBER(6)<=NUMBER(7); NUMBER(7)<="1111"; END IF; END IF; END PROCESS; PROCESS(CLK)IS BEGIN IF RISING_EDGE(CLK) THEN COUNT<=COUNT+1; END IF; END PROCESS; PROCESS(DIAL1)IS BEGIN --在重拨键以后,显示已拨号码 IF RISING_EDGE(DIAL1) THEN LOCK(31 DOWNTO 28)<=NUMBER(7); LOCK(27 DOWNTO 24)<=NUMBER(6); LOCK(23 DOWNTO 20)<=NUMBER(5); LOCK(19 DOWNTO 16)<=NUMBER(4); LOCK(15 DOWNTO 12)<=NUMBER(3); LOCK(11 DOWNTO 8)<=NUMBER(2); LOCK(7 DOWNTO 4)<=NUMBER(1); LOCK(3 DOWNTO 0)<=NUMBER(0); END IF; END PROCESS; END ARCHITECTURE;
时间: 2024-04-28 15:26:45 浏览: 39
这段代码是一个数字电路,它实现了一个数字输入器。其中,第一个进程根据输入信号 DIN1 的不同位的取值,将一个 4 位二进制码转换成一个 4 位的 BCD 码,并将其赋值给 BCD 信号。第二个进程中,根据 KEY1 信号和 CLEAR 与 RE_DIAL1 信号的取值,实现数字的输入和删除。当 CLEAR 信号为 1 且 RE_DIAL1 信号为 0 时,数字从高位向低位移动,实现删除。当 CLEAR 信号为 0 且 RE_DIAL1 信号为 0 时,数字从低位向高位移动,实现数字输入。第三个进程对时钟信号进行处理,实现计数器 COUNT 的计数。第四个进程根据重拨键 DIAL1 的状态,将已经输入的数字 LOCK 显示出来。最终,这个数字输入器可以实现数字的输入、删除和显示。
相关问题
在下面横线上填上合适的语句,完成BCD-7段LED显示译码器的设计。 LIBRARY IEEE ; USE IEEE.STD_LOGIC_1164.ALL; ENTITY BCD_7SEG IS PORT( BCD_LED : IN STD_LOGIC_VECTOR(3 DOWNTO 0); LEDSEG : OUT STD_LOGIC_VECTOR(6 DOWNTO 0)); END BCD_7SEG; ARCHITECTURE BEHAVIOR OF BCD_7SEG IS BEGIN PROCESS(BCD_LED) 1 IF BCD_LED="0000" THEN LEDSEG<="0111111"; ELSIF BCD_LED="0001" THEN LEDSEG<="0000110"; ELSIF BCD_LED="0010" THEN LEDSEG<=“1011011”; ELSIF BCD_LED="0011" THEN LEDSEG<="1001111"; ELSIF BCD_LED="0100" THEN LEDSEG<="1100110"; ELSIF BCD_LED="0101" THEN LEDSEG<="1101101"; ELSIF BCD_LED="0110" THEN LEDSEG<="1111101"; ELSIF BCD_LED="0111" THEN LEDSEG<="0000111"; ELSIF BCD_LED="1000" THEN LEDSEG<="1111111"; ELSIF BCD_LED="1001" THEN LEDSEG<="1101111"; ELSE LEDSEG<= 2 ; END IF; END PROCESS; END BEHAVIOR;
填空部分应该是:
1. BEGIN
2. ELSE LEDSEG<="1111110";
3. END IF;
完整代码如下:
```
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY BCD_7SEG IS
PORT(
BCD_LED : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
LEDSEG : OUT STD_LOGIC_VECTOR(6 DOWNTO 0)
);
END BCD_7SEG;
ARCHITECTURE BEHAVIOR OF BCD_7SEG IS
BEGIN
PROCESS (BCD_LED)
BEGIN
IF BCD_LED = "0000" THEN
LEDSEG <= "0111111";
ELSIF BCD_LED = "0001" THEN
LEDSEG <= "0000110";
ELSIF BCD_LED = "0010" THEN
LEDSEG <= "1011011";
ELSIF BCD_LED = "0011" THEN
LEDSEG <= "1001111";
ELSIF BCD_LED = "0100" THEN
LEDSEG <= "1100110";
ELSIF BCD_LED = "0101" THEN
LEDSEG <= "1101101";
ELSIF BCD_LED = "0110" THEN
LEDSEG <= "1111101";
ELSIF BCD_LED = "0111" THEN
LEDSEG <= "0000111";
ELSIF BCD_LED = "1000" THEN
LEDSEG <= "1111111";
ELSIF BCD_LED = "1001" THEN
LEDSEG <= "1101111";
ELSE
LEDSEG <= "1111110";
END IF;
END PROCESS;
END BEHAVIOR;
```
解读这段代码BEGIN PROCESS(CLK)IS BEGIN IF RISING_EDGE(CLK) THEN COUNT1<=COUNT1+1; END IF; END PROCESS; CLK1<='0' WHEN COUNT1<"1100" ELSE '1'; PROCESS(CLK1)IS BEGIN IF RISING_EDGE(CLK1) THEN DIN1(9 DOWNTO 0)<=DIN(9 DOWNTO 0); DIAL1<=DIAL; RE_DIAL1<=RE_DIAL; END IF; END PROCESS; KEY<=(DIN1(0) OR DIN1(1) OR DIN1 (2) OR DIN1 (3) OR DIN1 (4) OR DIN1 (5) OR DIN(6) OR DIN1(7) OR DIN1(8) OR DIN1(9)); PROCESS(CLK1)IS BEGIN IF FALLING_EDGE(CLK1) THEN IF COUNT2="100" THEN IF CLEAR='0' AND RE_DIAL='0' THEN KEY1<=KEY; ELSIF CLEAR ='1' AND RE_DIAL='0'THEN KEY1<=CLK; ELSE KEY1<=RE_DIAL1; END IF; COUNT2<="000"; ELSE COUNT2<=COUNT2+1; END IF; END IF; END PROCESS;
这段代码是一个基于时钟的数字电路,它包含了两个进程。第一个进程在时钟上升沿触发时,对一个计数器 COUNT1 进行加 1 操作。第二个进程在另一个时钟 CLK1 的上升沿触发时,将输入信号 DIN 的前 10 位传递给 DIN1,DIAL 信号传递给 DIAL1,RE_DIAL 信号传递给 RE_DIAL1。同时,将 DIN1 的所有位进行逻辑或运算,结果传递给 KEY 信号。第二个进程中还有一个带有计数器 COUNT2 的条件语句,用于在 COUNT2 计数到 100 时,根据 CLEAR 和 RE_DIAL 信号的不同情况,将 KEY1 信号赋值为 KEY、CLK、或 RE_DIAL1,然后将 COUNT2 归零。