1

我试图在 ISim 的控制台窗口中的特定时间返回一个 CLK 信号的值(如下面的代码所示,7.5ns)。我收到此错误:

错误:HDLCompiler:258 - “保存的项目..” 第 91 行:无法将 std_logic 类型转换为无符号类型

我已经将这种转换( integer'image(to_integer(unsigned((generic_signal)))); 与std_logic_vectors一起使用,它工作得很好,但这个不会。CLK 值是 0 或 1,我只想在给定时间返回该值。你知道更有效的方法吗?您是否碰巧知道一个链接,我可以在该链接中看到更多使用“图像”返回变量值的方法

   library IEEE;
    use IEEE.STD_LOGIC_1164.all;
    use IEEE.NUMERIC_STD.ALL;
    use IEEE.STD_LOGIC_UNSIGNED.ALL;

-----------------------------------------------------------
-- Component Declaration for the Unit Under Test
-----------------------------------------------------------
component SyncPosEdge port(
   SYS_CLK : in std_logic;
   InputSignal : in std_logic;
   SyncOutputSignal : out std_logic);
end component;

-----------------------------------------------------------
-- Inputs
-----------------------------------------------------------
signal SYS_CLK : std_logic := '0';
signal InputSignal : std_logic := '0';

-----------------------------------------------------------
-- Outputs
-----------------------------------------------------------
signal SyncOutputSignal : std_logic;

-----------------------------------------------------------
-- Clock period definitions
-----------------------------------------------------------
constant SYS_CLK_period : time := 5 ns;
constant InputPeriod : time := 15 ns;

begin

-----------------------------------------------------------
-- Instantiate the Unit Under Test
-----------------------------------------------------------
uut:SyncPosEdge port map(
   SYS_CLK => SYS_CLK,
   InputSignal => InputSignal,
   SyncOutputSignal => SyncOutputSignal);

-----------------------------------------------------------
-- Clock process definitions
-----------------------------------------------------------
SYS_CLK_process:process
begin
   SYS_CLK <= '0';
   wait for SYS_CLK_period / 2;
   SYS_CLK <= '1';
   wait for SYS_CLK_period / 2;
end process SYS_CLK_process;

-----------------------------------------------------------
-- Generate Input Signal
-----------------------------------------------------------
InputGen:process
begin
   InputSignal <= '0';
    wait for InputPeriod / 2;
    InputSignal <= '1';
    wait for InputPeriod / 2;
end process;

-----------------------------------------------------------
-- Stimulus process
-----------------------------------------------------------
stim_proc:process
begin   
   wait for 7.5 ns;
    report "SYS_CLK: " & integer'image(to_integer(unsigned((SYS_CLK))));

   wait;
end process stim_proc;
4

1 回答 1

1

您可以std_logic使用该image属性轻松打印:

report "SYS_CLK: " & std_logic'image(SYS_CLK);
于 2015-07-29T14:25:05.817 回答