tlc5510.vhd

用VHDL语言编写的DDS正弦函数发生器

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
ENTITY TLC5510 IS
	PORT(SYS_CLK:IN STD_LOGIC;
		 DAT_IN:IN STD_LOGIC_VECTOR(7 DOWNTO 0);
		 OE,CLK_OUT:OUT STD_LOGIC;
		 DAT_OUT:OUT STD_LOGIC_VECTOR(7 DOWNTO 0));
END;
ARCHITECTURE ONE OF TLC5510 IS
	SIGNAL F:STD_LOGIC_VECTOR(1 DOWNTO 0);
	BEGIN
	OE<='0';
	DAT_OUT<=DAT_IN;
	CLK_OUT<=F(0);--25M  F(1)
	PROCESS(SYS_CLK)
		BEGIN
		IF SYS_CLK'EVENT AND SYS_CLK='1' THEN
			F<=F+1;
		END IF;
	END PROCESS;
END;