freqtest.vhd

来自「基于ALTERA的cyclone 系列的控制电机的实验例程」· VHDL 代码 · 共 36 行

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY FREQTEST IS
    PORT ( CLK : IN STD_LOGIC;  
          FSIN : IN STD_LOGIC;
          CCOUT: OUT STD_LOGIC;
          DOUT : OUT STD_LOGIC_VECTOR(15 DOWNTO 0) );
END FREQTEST;
ARCHITECTURE struc OF FREQTEST IS
COMPONENT TESTCTL
    PORT ( CLK : IN STD_LOGIC;     TSTEN : OUT STD_LOGIC; 
       CLR_CNT : OUT STD_LOGIC;     Load : OUT STD_LOGIC   );
END COMPONENT;
COMPONENT CNT
    PORT (    CLOCK : IN STD_LOGIC;  
               ACLR : IN STD_LOGIC; 
             CLK_EN : IN STD_LOGIC;
                  Q : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
               COUT : OUT STD_LOGIC );
END COMPONENT;
COMPONENT REG
    PORT (   CLOCK : IN STD_LOGIC;
              DATA : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
                 Q : OUT STD_LOGIC_VECTOR(15 DOWNTO 0) );
END COMPONENT;
    SIGNAL TSTEN1 : STD_LOGIC;
    SIGNAL CLR_CNT1 : STD_LOGIC;
    SIGNAL Load1 : STD_LOGIC;
    SIGNAL DTO1 : STD_LOGIC_VECTOR(15 DOWNTO 0);
BEGIN
  U1 : TESTCTL  PORT MAP( CLK =>CLK,    TSTEN => TSTEN1, CLR_CNT => CLR_CNT1, Load => Load1 );
  U2 :      REG PORT MAP( CLOCK => Load1, DATA => DTO1,Q => DOUT);
  U3 :   CNT  PORT MAP(CLOCK => FSIN,ACLR => CLR_CNT1,CLK_EN => TSTEN1, Q => DTO1,COUT => CCOUT );
END struc;