计划计数器的增量无效 [英] Program Counter's Increment Won't Work

问题描述

一切正常，但增量功能有效。它可以从0递增到1，从1递增到2，然后从2递增到 1111111111。

Everything works but the increment function. It can increment from 0 to 1, 1 to 2, and then from 2 it goes to "1111111111". I'm stumped.

变量：

D_IN：数据输入

PC_OE：高电平有效。驱动PC_TRI输出。

PC_OE: Active high. Drives PC_TRI output.

PC_LD：高电平有效将D_IN加载到PC中。

PC_LD: Active high synchronously loads D_IN into PC.

PC_INC：高电平有效同步递增

PC_INC: Active high synchronously increments value in PC.

RST：有效的高异步复位。

RST: Active high asyncronous reset.

PC_COUNT：PC中的当前值。地址。

PC_COUNT: Current value in PC. Address.

PC_TRI：PC在三态控制下的当前值。当PC_OE = 1时，PC_TRI <=
PC_COUNT，否则为高阻抗。

PC_TRI: Current value in the PC under tri-state control. When PC_OE = '1', PC_TRI <= PC_COUNT, else high impedance.

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use IEEE.STD_LOGIC_UNSIGNED.ALL;

use IEEE.STD_LOGIC_ARITH.ALL; 


entity ProgramCounter is
    Port ( D_IN : in  STD_LOGIC_VECTOR (9 downto 0);

           PC_OE : in  STD_LOGIC;

           PC_LD : in  STD_LOGIC;

           PC_INC : in  STD_LOGIC;

           RST : in  STD_LOGIC;

           CLK : in  STD_LOGIC;

           PC_COUNT : out  STD_LOGIC_VECTOR (9 downto 0);

           PC_TRI : out  STD_LOGIC_VECTOR (9 downto 0));


end ProgramCounter;

architecture Behavioral of ProgramCounter is

signal s_COUNT : STD_LOGIC_VECTOR (9 downto 0);

begin

s_COUNT <= "0000000000";

proc: process(RST, CLK, PC_LD, D_IN, s_COUNT, PC_INC, PC_OE)
begin

    if  (RST = '1') then
        s_COUNT <= "0000000000";
    elsif (rising_edge(CLK)) then

        if (PC_LD = '1') then
            s_COUNT <= D_IN;
        elsif (PC_INC = '1') then
            s_COUNT <= s_COUNT + 1;
        else
      end if;

    else
    end if;

if (PC_OE = '1') then
    PC_TRI <= s_COUNT;
else
    PC_TRI <= "ZZZZZZZZZZ";
end if;

PC_COUNT <= s_COUNT;

end process proc;

end Behavioral;

推荐答案

QuantumRipple的注释非常有用

The comment of QuantumRipple is very useful

begin
--s_COUNT <= "0000000000";
...

我试图评论这样的行，并且行得通。
尝试执行此操作，并在开始计数之前进行RST

I tried to comment such line and it worked. Try to do this, and make RST before start to count

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