最终下载到FPGA的是RBF文件吗？

是的，将RBF文件下载到FPGA是常见的处理器编程方式。下面是一个VHDL代码示例，用于将RBF文件加载到FPGA板上进行编程：

library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all;

entity fpga_programmer is port( fpga_clk : in std_logic; fpga_prog_b : out std_logic; fpga_done : in std_logic ); end entity;

architecture fpga_prog_arch of fpga_programmer is type rbf_data_t is array(integer range <>) of std_logic_vector(7 downto 0);

constant rbf_data : rbf_data_t := ( -- RBF data for FPGA programming goes here, converted to binary -- values with one byte per element in the array );

signal bits_left : integer := 0; signal rbf_data_idx : integer := 0; signal shift_reg : std_logic_vector(31 downto 0) := (others => '0'); signal fpga_prog_state : integer range 0 to 3 := 0; begin -- FSM for programming the FPGA process(fpga_clk) begin if rising_edge(fpga_clk) then case fpga_prog_state is when 0 => -- Idle state if fpga_done = '1' then fpga_prog_b <= '0'; fpga_prog_state <= 1; rbf_data_idx <= 0; bits_left <= 0; shift_reg <= (others => '0'); end if;

    when 1 =>
      -- Assert PROGRAM_B to reset the FPGA
      fpga_prog_b <= '0';
      fpga_prog_state <= 2;

    when 2 =>
      -- Program FPGA with RBF data
      if bits_left = 0 then
        -- Fetch next 32 bits from RBF data
        shift_reg <= std_logic_vector(to_unsigned(to_integer(unsigned(rbf_data(rbf_data_idx))) * 256 + to_integer(unsigned(rbf_data(rbf_data_idx+1))), 32));
        rbf_data_idx <= rbf_data_idx + 2;
        bits_left <= 32;
      end if;

      -- Shift next bit onto PROGRAM_B
      fpga_prog_b <= shift_reg(31);
      shift_reg <= shift_reg(30 downto 0) & "0";
      bits_left <= bits_left - 1;

      if bits_left = 0 and rbf_data_idx = rbf_data'high then
        -- Done programming
        fpga_prog_state <= 3;
      end if;

    when 3 =>
      -- Release PROGRAM_B
      fpga_prog_b <= '1';
      fpga_prog_state <= 0;

  end case;
end if;

end process; end architecture;