VHDL如何使用“未签名”信号作为选择确切信号的计数器？

发布于 2025-01-24 06:23:51 字数 1067 浏览 0 评论 0原文

我有执行两个数字乘数的任务，现在我遇到了下一个问题：在我的代码中，我想将Unsigned I（0至3）用作4位计数器，然后在周期中以某种方式使用i（regb（i））数量的寄存器B，然后将其用于进一步的操作。我试图像以前写的那样（regb（i））做到这一点，但这给了我一个错误。有人可以告诉我，如果有比创建多路复用器更聪明的方法吗？

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.NUMERIC_STD.ALL;

entity multiplier is 
port (A, B  : in signed(0 to 10);
    rest   : in bit;
    result : out signed(0 to 10);
    ready  : out bit := '1';
    clk    : in bit);
end multiplier;

architecture solution of multiplier is
  signal regA, regNB, regRes: signed(0 to 10);
  signal regB: signed(0 to 11);
  signal i: unsigned(0 to 3) := "0000";
begin 
process begin
    wait on rest until rest='0' and clk='1';
     regA <= A;
     regB <= B&'0';
     regRes <= (others => '0');
 regNB <= -B(0 to 10);
 i <= "0000";
 ready <= '0';
 wait on clk until clk='1';
 while i /= "1011" loop
    if(regB(i) = '0') then
    end if;
     wait on clk until clk='1';
     i <= i + 1;
 end loop;
 --wait on clk until clk='1';
 ready <= '1';
 result <= regA;
  end process;
end solution;

原文

I have task to do two number multiplier, and now I am stuck with next problem:
In my code, I had idea to use unsigned i(0 to 3) as 4-bit counter and then in cycle somehow take bit of register B with number of i (regB(i)) and then use it for further actions. I tried to do it simply as I wrote before (regB(i)) but it gives me an error. Could somebody tell me please if there is more clever way to do this than creating a multiplexor?

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.NUMERIC_STD.ALL;

entity multiplier is 
port (A, B  : in signed(0 to 10);
    rest   : in bit;
    result : out signed(0 to 10);
    ready  : out bit := '1';
    clk    : in bit);
end multiplier;

architecture solution of multiplier is
  signal regA, regNB, regRes: signed(0 to 10);
  signal regB: signed(0 to 11);
  signal i: unsigned(0 to 3) := "0000";
begin 
process begin
    wait on rest until rest='0' and clk='1';
     regA <= A;
     regB <= B&'0';
     regRes <= (others => '0');
 regNB <= -B(0 to 10);
 i <= "0000";
 ready <= '0';
 wait on clk until clk='1';
 while i /= "1011" loop
    if(regB(i) = '0') then
    end if;
     wait on clk until clk='1';
     i <= i + 1;
 end loop;
 --wait on clk until clk='1';
 ready <= '1';
 result <= regA;
  end process;
end solution;

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べ繥欢鉨o。 2025-01-31 06:23:51

发生错误是因为切片或索引签名类型需要使用整数。您已经使用了unsigned。因此，您需要在索引之前转换类型：

regB(to_integer(i)) = '0'

旁注：我假设您只想模拟此代码，因为它是不合理的。

You error occurs because slicing or indexing a signed type requires the use of integers. You have used unsigned. Hence you need to convert the type before indexing: