SPI总线配置外部PLL芯片AD9518和ADC9268的VHDL语言FPGA程序源码.zip

SPI总线配置外部PLL芯片AD9518和ADC9268的VHDL语言FPGA程序源码： LIBRARY ieee; USE ieee.std_logic_1164.ALL; use IEEE.std_logic_arith.all; use IEEE.std_logic_unsigned.all; ENTITY spi_interface IS PORT ( clk : IN STD_LOGIC; -- clk_spi : in std_logic; reset : IN STD_LOGIC; tst_in : IN STD_LOGIC; spi_dout_adc : OUT STD_LOGIC; spi_cs_n_adc1 : out std_logic; spi_cs_n_adc2 : out std_logic; spi_cs_n_adc3 : out std_logic;