jtag_uart.vhd

nois 2cpu 硬件实现编程

  return result;
  
end readmemb;
                          
-- synthesis translate_on
                      

begin

--synthesis translate_off
    q <= mem_array(CONV_INTEGER(UNSIGNED((address))));
    process (clk, reset_n)
    begin
      if reset_n = '0' then
        d1_pre <= std_logic'('0');
        d2_pre <= std_logic'('0');
        d3_pre <= std_logic'('0');
        d4_pre <= std_logic'('0');
        d5_pre <= std_logic'('0');
        d6_pre <= std_logic'('0');
        d7_pre <= std_logic'('0');
        d8_pre <= std_logic'('0');
        d9_pre <= std_logic'('0');
        new_rom <= std_logic'('0');
      elsif clk'event and clk = '1' then
        if (std_logic_vector'("00000000000000000000000000000001")) /= std_logic_vector'("00000000000000000000000000000000") then 
          d1_pre <= pre;
          d2_pre <= d1_pre;
          d3_pre <= d2_pre;
          d4_pre <= d3_pre;
          d5_pre <= d4_pre;
          d6_pre <= d5_pre;
          d7_pre <= d6_pre;
          d8_pre <= d7_pre;
          d9_pre <= d8_pre;
          new_rom <= d9_pre;
        end if;
      end if;

    end process;


    num_bytes <= mutex(1);
                         
    safe <= safe_wire;
    safe_wire <= to_std_logic( address < mutex(1) );

    process (clk, reset_n)
    begin
      if reset_n = '0' then
        safe_delay <= '0';
      elsif clk'event and clk = '1' then -- balance ' for emacs quoting
        safe_delay <= safe_wire;
      end if;
    end process;

    process (clk, reset_n)
      variable poll_count : integer := POLL_RATE; -- STD_LOGIC_VECTOR (31:0);
      variable status : file_open_status; -- status for fopen
      variable mutex_string : LINE;  -- temp space for read/write data
      variable stream_string : LINE;  -- temp space for read data
      variable init_done : BOOLEAN; -- only used if non-interactive
      variable interactive : BOOLEAN := FALSE;
    begin
      if reset_n /= '1' then
        address <= "000000000000";
        mem_array(0) <= X"00";
        mutex(0) <= X"00000000";
        mutex(1) <= X"00000000";
        pre <= '0';
        init_done := FALSE;
      elsif clk'event and clk = '1' then -- balance ' for emacs quoting
        pre <= '0';
        if incr_addr = '1' and safe_wire = '1' then
          address <= address + "000000000001";
        end if;
        -- blast mutex via textio after falling edge of safe
        if mutex(0) /= X"00000000" and safe_wire = '0' and safe_delay = '1' then
	  if interactive then           -- bash mutex
            file_open (status, mutex_handle, "/data/job/20061127/2047501/examples/vhdl/niosII_cycloneII_2c35/standard/std_2C35_sim/jtag_uart_input_mutex.dat", WRITE_MODE);
            write (mutex_string, string'("0")); -- balance ' for emacs quoting
            writeline (mutex_handle, mutex_string);
            file_close (mutex_handle);
            mutex(0) <= X"00000000";
	  else -- non-nteractive does not bash mutex: it stops poll counter
	    init_done := TRUE;
          end if;
        end if;
        if poll_count < POLL_RATE then  -- wait
          if not init_done then         -- stop counting if init_done is TRUE
            poll_count := poll_count + 1;
          end if;
        else                            -- do the real work
          poll_count := 0;
          -- get mutex via textio ...
          mutex(0) <= get_mutex_val ("/data/job/20061127/2047501/examples/vhdl/niosII_cycloneII_2c35/standard/std_2C35_sim/jtag_uart_input_mutex.dat");
          if mutex(0) /= X"00000000" and safe_wire = '0' then
            -- read stream into array after previous stream is complete
            mutex (1) <= mutex (0); -- save mutex value for address compare
            -- get mem_array via textio ...
            mem_array <= readmemb("/data/job/20061127/2047501/examples/vhdl/niosII_cycloneII_2c35/standard/std_2C35_sim/jtag_uart_input_stream.dat");
            -- prep address and pre-pulse to alert world to new contents
            address <= "000000000000";
            pre <= '1';
          end if; -- poll_count
        end if;   -- clock
      end if;     -- reset
    end process;
                         --synthesis translate_on

end europa;



-- turn off superfluous VHDL processor warnings 
-- altera message_level Level1 
-- altera message_off 10034 10035 10036 10037 10230 10240 10030 

library altera;
use altera.altera_europa_support_lib.all;

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

entity jtag_uart_sim_scfifo_r is 
        port (
              -- inputs:
                 signal clk : IN STD_LOGIC;
                 signal fifo_rd : IN STD_LOGIC;
                 signal rst_n : IN STD_LOGIC;

              -- outputs:
                 signal fifo_EF : OUT STD_LOGIC;
                 signal fifo_rdata : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
                 signal rfifo_full : OUT STD_LOGIC;
                 signal rfifo_used : OUT STD_LOGIC_VECTOR (5 DOWNTO 0)
              );
end entity jtag_uart_sim_scfifo_r;


architecture europa of jtag_uart_sim_scfifo_r is
--synthesis translate_off
component jtag_uart_drom_module is 
           generic (
                    POLL_RATE : integer := 100
                    );
           port (
                 -- inputs:
                    signal clk : IN STD_LOGIC;
                    signal incr_addr : IN STD_LOGIC;
                    signal reset_n : IN STD_LOGIC;

                 -- outputs:
                    signal new_rom : OUT STD_LOGIC;
                    signal num_bytes : OUT STD_LOGIC_VECTOR (31 DOWNTO 0);
                    signal q : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
                    signal safe : OUT STD_LOGIC
                 );
end component jtag_uart_drom_module;

--synthesis translate_on
                signal bytes_left :  STD_LOGIC_VECTOR (31 DOWNTO 0);
                signal fifo_rd_d :  STD_LOGIC;
                signal internal_fifo_rdata1 :  STD_LOGIC_VECTOR (7 DOWNTO 0);
                signal internal_rfifo_full1 :  STD_LOGIC;
                signal new_rom :  STD_LOGIC;
                signal num_bytes :  STD_LOGIC_VECTOR (31 DOWNTO 0);
                signal rfifo_entries :  STD_LOGIC_VECTOR (6 DOWNTO 0);
                signal safe :  STD_LOGIC;

begin

  --vhdl renameroo for output signals
  fifo_rdata <= internal_fifo_rdata1;
  --vhdl renameroo for output signals
  rfifo_full <= internal_rfifo_full1;
--synthesis translate_off
    --jtag_uart_drom, which is an e_drom
    jtag_uart_drom : jtag_uart_drom_module
      port map(
        new_rom => new_rom,
        num_bytes => num_bytes,
        q => internal_fifo_rdata1,
        safe => safe,
        clk => clk,
        incr_addr => fifo_rd_d,
        reset_n => rst_n
      );


    -- Generate rfifo_entries for simulation
    process (clk, rst_n)
    begin
      if rst_n = '0' then
        bytes_left <= std_logic_vector'("00000000000000000000000000000000");
        fifo_rd_d <= std_logic'('0');
      elsif clk'event and clk = '1' then
        fifo_rd_d <= fifo_rd;
        -- decrement on read
        if std_logic'(fifo_rd_d) = '1' then 
          bytes_left <= A_EXT (((std_logic_vector'("0") & (bytes_left)) - (std_logic_vector'("00000000000000000000000000000000") & (A_TOSTDLOGICVECTOR(std_logic'('1'))))), 32);
        end if;
        -- catch new contents
        if std_logic'(new_rom) = '1' then 
          bytes_left <= num_bytes;
        end if;
      end if;

    end process;

    fifo_EF <= to_std_logic((bytes_left = std_logic_vector'("00000000000000000000000000000000")));
    internal_rfifo_full1 <= to_std_logic((bytes_left>std_logic_vector'("00000000000000000000000001000000")));
    rfifo_entries <= A_EXT (A_WE_StdLogicVector((std_logic'((internal_rfifo_full1)) = '1'), std_logic_vector'("00000000000000000000000001000000"), bytes_left), 7);
    rfifo_used <= rfifo_entries(5 DOWNTO 0);
--synthesis translate_on

end europa;



-- turn off superfluous VHDL processor warnings 
-- altera message_level Level1 
-- altera message_off 10034 10035 10036 10037 10230 10240 10030 

library altera;
use altera.altera_europa_support_lib.all;

library altera_mf;
use altera_mf.all;

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

library lpm;
use lpm.all;

entity jtag_uart_scfifo_r is 
        port (
              -- inputs:
                 signal clk : IN STD_LOGIC;
                 signal fifo_clear : IN STD_LOGIC;
                 signal fifo_rd : IN STD_LOGIC;
                 signal rst_n : IN STD_LOGIC;
                 signal t_dat : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
                 signal wr_rfifo : IN STD_LOGIC;

              -- outputs:
                 signal fifo_EF : OUT STD_LOGIC;
                 signal fifo_rdata : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
                 signal rfifo_full : OUT STD_LOGIC;
                 signal rfifo_used : OUT STD_LOGIC_VECTOR (5 DOWNTO 0)
              );
end entity jtag_uart_scfifo_r;


architecture europa of jtag_uart_scfifo_r is
--synthesis translate_off
component jtag_uart_sim_scfifo_r is 
           port (
                 -- inputs:
                    signal clk : IN STD_LOGIC;
                    signal fifo_rd : IN STD_LOGIC;
                    signal rst_n : IN STD_LOGIC;

                 -- outputs:
                    signal fifo_EF : OUT STD_LOGIC;
                    signal fifo_rdata : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
                    signal rfifo_full : OUT STD_LOGIC;
                    signal rfifo_used : OUT STD_LOGIC_VECTOR (5 DOWNTO 0)
                 );
end component jtag_uart_sim_scfifo_r;

--synthesis translate_on
--synthesis read_comments_as_HDL on
--  component scfifo is
--GENERIC (
--      lpm_hint : STRING;
--        lpm_numwords : NATURAL;
--        lpm_showahead : STRING;
--        lpm_type : STRING;
--        lpm_width : NATURAL;
--        lpm_widthu : NATURAL;
--        overflow_checking : STRING;
--        underflow_checking : STRING;
--        use_eab : STRING
--      );
--    PORT (
--    signal full : OUT STD_LOGIC;
--        signal q : OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
--        signal usedw : OUT STD_LOGIC_VECTOR (5 DOWNTO 0);
--        signal empty : OUT STD_LOGIC;
--        signal rdreq : IN STD_LOGIC;
--        signal aclr : IN STD_LOGIC;
--        signal data : IN STD_LOGIC_VECTOR (7 DOWNTO 0);
--        signal clock : IN STD_LOGIC;
--        signal wrreq : IN STD_LOGIC
--      );
--  end component scfifo;
--synthesis read_comments_as_HDL off
                signal internal_fifo_EF :  STD_LOGIC;
                signal internal_fifo_rdata :  STD_LOGIC_VECTOR (7 DOWNTO 0);
                signal internal_rfifo_full :  STD_LOGIC;
                signal internal_rfifo_used :  STD_LOGIC_VECTOR (5 DOWNTO 0);

begin

  --vhdl renameroo for output signals
  fifo_EF <= internal_fifo_EF;
  --vhdl renameroo for output signals
  fifo_rdata <= internal_fifo_rdata;
  --vhdl renameroo for output signals
  rfifo_full <= internal_rfifo_full;
  --vhdl renameroo for output signals
  rfifo_used <= internal_rfifo_used;
--synthesis translate_off
    --the_jtag_uart_sim_scfifo_r, which is an e_instance
    the_jtag_uart_sim_scfifo_r : jtag_uart_sim_scfifo_r
      port map(
        fifo_EF => internal_fifo_EF,
        fifo_rdata => internal_fifo_rdata,
        rfifo_full => internal_rfifo_full,
        rfifo_used => internal_rfifo_used,
        clk => clk,
        fifo_rd => fifo_rd,
        rst_n => rst_n
      );


--synthesis translate_on
--synthesis read_comments_as_HDL on
--    rfifo : scfifo
--      generic map(
--        lpm_hint => "RAM_BLOCK_TYPE=AUTO",
--        lpm_numwords => 64,
--        lpm_showahead => "OFF",
--        lpm_type => "scfifo",
--        lpm_width => 8,
--        lpm_widthu => 6,
--        overflow_checking => "OFF",
--        underflow_checking => "OFF",
--        use_eab => "ON"
--      )