在 VHDL (Spartan 3) 的 2 个七段显示器上显示不同的数字
Displaying different numbers on 2 seven segment displays on VHDL (Spartan 3)
我们有一个关于解码的作业。 4个输入开关（二进制组合）和显示对应的开关组合为4-LED和十进制数值为1个七段。并将这些二进制组合转换为格雷码（也是4位）并将相应的4-LED和十进制值显示为1个七段。
我已经有了 K-Mapping 的解决方案，但我的主要问题是在两个段上打印不同的数字。我的问题是它显示了最后解析的代码。他们对七段有相同的输出。
这是我的代码..
entity BinaryToGrey is
Port ( Bin : in STD_LOGIC_VECTOR (3 downto 0);
BinLed: out STD_LOGIC_VECTOR (3 downto 0);
Enable: in STD_LOGIC_VECTOR (3 downto 0);
Segment: out STD_LOGIC_VECTOR (6 downto 0);
Grey : inout STD_LOGIC_VECTOR (3 downto 0));
end BinaryToGrey;
architecture Behavioral of BinaryToGrey is
begin
Grey(3) <= Bin(3);
Grey(2) <= Bin(3) XOR Bin(2);
Grey(1) <= Bin(2) XOR Bin(1);
Grey(0) <= Bin(1) XOR Bin(0);
process(Bin)
begin
case Bin is
when "0000"=> BinLed <="0000"; -- '0'
when "0001"=> BinLed <="0001"; -- '1'
when "0010"=> BinLed <="0010"; -- '2'
when "0011"=> BinLed <="0011"; -- '3'
when "0100"=> BinLed <="0100"; -- '4'
when "0101"=> BinLed <="0101"; -- '5'
when "0110"=> BinLed <="0110"; -- '6'
when "0111"=> BinLed <="0111"; -- '7'
when "1000"=> BinLed <="1000"; -- '8'
when "1001"=> BinLed <="1001"; -- '9'
when "1010"=> BinLed <="1010"; -- 'A'
when "1011"=> BinLed <="1011"; -- 'b'
when "1100"=> BinLed <="1100"; -- 'C'
when "1101"=> BinLed <="1101"; -- 'd'
when "1110"=> BinLed <="1110"; -- 'E'
when others => BinLed <="1111"; -- 'F'
end case;
end process;
process(Bin,Enable)
begin
Enable(0) = '0';
Enable(1) = '1';
Enable(2) = '1';
Enable(3) = '0';
case Bin is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
end process;
process(Grey,Enable)
begin
Enable(0) = '0';
Enable(1) = '1';
Enable(2) = '1';
Enable(3) = '0';
case Grey is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
end if;
end process;
end Behavioral;
代码中有几处错误。
1) Enable是一个输入，但是有赋值给它。如果该信号用于选择 7 段显示，则它必须是输出。
Enable: out STD_LOGIC_VECTOR (3 downto 0);
2) 两个进程驱动同一个 Segment 信号。分配应该在一个进程中，并且应该是多路复用的。
创建一个 Select 信号并在每个时钟周期切换它。您还需要一个时钟输入。 （注：我没有展示Select信号的产生）
process(Bin,Grey)
begin
if (Select = '0') then -- Select one display
Enable(0) <= '0';
Enable(1) <= '1';
Enable(2) <= '0';
Enable(3) <= '0';
case Bin is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
else -- Select the other display
Enable(0) <= '0';
Enable(1) <= '0';
Enable(2) <= '1';
Enable(3) <= '0';
case Grey is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
end if;
end process;
3) 在一个时钟周期内仅断言 Enable 信号的一位，并使用 <= 进行分配。我假设 Enable 是高电平有效。如果不是，请适当更改值。
选择显示1时：
Enable(0) <= '0';
Enable(1) <= '1';
Enable(2) <= '0';
Enable(3) <= '0';
选择显示2时：
Enable(0) <= '0';
Enable(1) <= '0';
Enable(2) <= '1';
Enable(3) <= '0';
4) Enable 信号不应出现在敏感列表中。我把两个进程合并后应该是这样的
process(Bin,Grey)
我们有一个关于解码的作业。 4个输入开关（二进制组合）和显示对应的开关组合为4-LED和十进制数值为1个七段。并将这些二进制组合转换为格雷码（也是4位）并将相应的4-LED和十进制值显示为1个七段。
我已经有了 K-Mapping 的解决方案，但我的主要问题是在两个段上打印不同的数字。我的问题是它显示了最后解析的代码。他们对七段有相同的输出。
这是我的代码..
entity BinaryToGrey is
Port ( Bin : in STD_LOGIC_VECTOR (3 downto 0);
BinLed: out STD_LOGIC_VECTOR (3 downto 0);
Enable: in STD_LOGIC_VECTOR (3 downto 0);
Segment: out STD_LOGIC_VECTOR (6 downto 0);
Grey : inout STD_LOGIC_VECTOR (3 downto 0));
end BinaryToGrey;
architecture Behavioral of BinaryToGrey is
begin
Grey(3) <= Bin(3);
Grey(2) <= Bin(3) XOR Bin(2);
Grey(1) <= Bin(2) XOR Bin(1);
Grey(0) <= Bin(1) XOR Bin(0);
process(Bin)
begin
case Bin is
when "0000"=> BinLed <="0000"; -- '0'
when "0001"=> BinLed <="0001"; -- '1'
when "0010"=> BinLed <="0010"; -- '2'
when "0011"=> BinLed <="0011"; -- '3'
when "0100"=> BinLed <="0100"; -- '4'
when "0101"=> BinLed <="0101"; -- '5'
when "0110"=> BinLed <="0110"; -- '6'
when "0111"=> BinLed <="0111"; -- '7'
when "1000"=> BinLed <="1000"; -- '8'
when "1001"=> BinLed <="1001"; -- '9'
when "1010"=> BinLed <="1010"; -- 'A'
when "1011"=> BinLed <="1011"; -- 'b'
when "1100"=> BinLed <="1100"; -- 'C'
when "1101"=> BinLed <="1101"; -- 'd'
when "1110"=> BinLed <="1110"; -- 'E'
when others => BinLed <="1111"; -- 'F'
end case;
end process;
process(Bin,Enable)
begin
Enable(0) = '0';
Enable(1) = '1';
Enable(2) = '1';
Enable(3) = '0';
case Bin is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
end process;
process(Grey,Enable)
begin
Enable(0) = '0';
Enable(1) = '1';
Enable(2) = '1';
Enable(3) = '0';
case Grey is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
end if;
end process;
end Behavioral;
代码中有几处错误。
1) Enable是一个输入，但是有赋值给它。如果该信号用于选择 7 段显示，则它必须是输出。
Enable: out STD_LOGIC_VECTOR (3 downto 0);
2) 两个进程驱动同一个 Segment 信号。分配应该在一个进程中，并且应该是多路复用的。
创建一个 Select 信号并在每个时钟周期切换它。您还需要一个时钟输入。 （注：我没有展示Select信号的产生）
process(Bin,Grey)
begin
if (Select = '0') then -- Select one display
Enable(0) <= '0';
Enable(1) <= '1';
Enable(2) <= '0';
Enable(3) <= '0';
case Bin is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
else -- Select the other display
Enable(0) <= '0';
Enable(1) <= '0';
Enable(2) <= '1';
Enable(3) <= '0';
case Grey is
when "0000"=> Segment <="1111110"; -- '0'
when "0001"=> Segment <="0110000"; -- '1'
when "0010"=> Segment <="1101101"; -- '2'
when "0011"=> Segment <="1111001"; -- '3'
when "0100"=> Segment <="0110011"; -- '4'
when "0101"=> Segment <="1011011"; -- '5'
when "0110"=> Segment <="1011111"; -- '6'
when "0111"=> Segment <="1110000"; -- '7'
when "1000"=> Segment <="1111111"; -- '8'
when "1001"=> Segment <="1111011"; -- '9'
when "1010"=> Segment <="1110111"; -- 'A'
when "1011"=> Segment <="0011111"; -- 'b'
when "1100"=> Segment <="1001110"; -- 'C'
when "1101"=> Segment <="0111101"; -- 'd'
when "1110"=> Segment <="1001111"; -- 'E'
when others => Segment <="1001011"; -- 'F'
end case;
end if;
end process;
3) 在一个时钟周期内仅断言 Enable 信号的一位，并使用 <= 进行分配。我假设 Enable 是高电平有效。如果不是，请适当更改值。
选择显示1时：
Enable(0) <= '0';
Enable(1) <= '1';
Enable(2) <= '0';
Enable(3) <= '0';
选择显示2时：
Enable(0) <= '0';
Enable(1) <= '0';
Enable(2) <= '1';
Enable(3) <= '0';
4) Enable 信号不应出现在敏感列表中。我把两个进程合并后应该是这样的
process(Bin,Grey)