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------------------------------------------------------------------------------

--  LEON3 Demonstration design test bench

--  Copyright (C) 2004 Jiri Gaisler, Gaisler Research

--

--  This program is free software; you can redistribute it and/or modify

--  it under the terms of the GNU General Public License as published by

--  the Free Software Foundation; either version 2 of the License, or

--  (at your option) any later version.

--

--  This program is distributed in the hope that it will be useful,

--  but WITHOUT ANY WARRANTY; without even the implied warranty of

--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

--  GNU General Public License for more details.

------------------------------------------------------------------------------

library ieee;

use ieee.std_logic_1164.all;

library grlib;

use grlib.stdlib.all;

library gaisler;

use gaisler.libdcom.all;

use gaisler.sim.all;

use gaisler.jtagtst.all;

library techmap;

use techmap.gencomp.all;

library micron;

use micron.components.all;

use work.debug.all;

use work.config.all;    -- configuration

entity testbench is

  generic (

    fabtech   : integer := CFG_FABTECH;

    memtech   : integer := CFG_MEMTECH;

    padtech   : integer := CFG_PADTECH;

    clktech   : integer := CFG_CLKTECH;

    ncpu      : integer := CFG_NCPU;

    disas     : integer := CFG_DISAS;   -- Enable disassembly to console

    dbguart   : integer := CFG_DUART;   -- Print UART on console

    pclow     : integer := CFG_PCLOW;

    clkperiod : integer := 20;          -- system clock period

    romwidth  : integer := 32;          -- rom data width (8/32)

    romdepth  : integer := 16;          -- rom address depth

    sramwidth  : integer := 32;         -- ram data width (8/16/32)

    sramdepth  : integer := 18;         -- ram address depth

    srambanks  : integer := 2           -- number of ram banks

  );

  port (

    pci_rst     : inout std_logic;      -- PCI bus

    pci_clk     : in std_logic;

    pci_gnt     : in std_logic;

    pci_idsel   : in std_logic;

    pci_lock    : inout std_logic;

    pci_ad      : inout std_logic_vector(31 downto 0);

    pci_cbe     : inout std_logic_vector(3 downto 0);

    pci_frame   : inout std_logic;

    pci_irdy    : inout std_logic;

    pci_trdy    : inout std_logic;

    pci_devsel  : inout std_logic;

    pci_stop    : inout std_logic;

    pci_perr    : inout std_logic;

    pci_par     : inout std_logic;

    pci_req     : inout std_logic;

    pci_serr    : inout std_logic;

    pci_host    : in std_logic;

    pci_66      : in std_logic

  );

end;

architecture behav of testbench is

constant promfile  : string := "prom.srec";  -- rom contents

constant sramfile  : string := "sram.srec";  -- ram contents

constant sdramfile : string := "sdram.srec"; -- sdram contents

component leon3mp

  generic (

    fabtech  : integer := CFG_FABTECH;

    memtech  : integer := CFG_MEMTECH;

    padtech  : integer := CFG_PADTECH;

    clktech  : integer := CFG_CLKTECH;

    disas     : integer := CFG_DISAS;   -- Enable disassembly to console

    dbguart   : integer := CFG_DUART;   -- Print UART on console

    pclow     : integer := CFG_PCLOW

  );

  port (

    resetn      : in  std_logic;

    clk         : in  std_logic;

    pllref      : in  std_logic;

    errorn      : out std_logic;

    address     : out std_logic_vector(27 downto 0);

    data        : inout std_logic_vector(31 downto 0);

    sa          : out std_logic_vector(14 downto 0);

    sd          : inout std_logic_vector(63 downto 0);

    sdclk       : out std_logic;

    sdcke       : out std_logic_vector (1 downto 0);    -- sdram clock enable

    sdcsn       : out std_logic_vector (1 downto 0);    -- sdram chip select

    sdwen       : out std_logic;                       -- sdram write enable

    sdrasn      : out std_logic;                       -- sdram ras

    sdcasn      : out std_logic;                       -- sdram cas

    sddqm       : out std_logic_vector (7 downto 0);    -- sdram dqm

    dsutx       : out std_logic;                        -- DSU tx data

    dsurx       : in  std_logic;                        -- DSU rx data

    dsuen       : in std_logic;

    dsubre      : in std_logic;

    dsuact      : out std_logic;

    txd1        : out std_logic;                        -- UART1 tx data

    rxd1        : in  std_logic;                        -- UART1 rx data

    txd2        : out std_logic;                        -- UART1 tx data

    rxd2        : in  std_logic;                        -- UART1 rx data

    ramsn       : out std_logic_vector (4 downto 0);

    ramoen      : out std_logic_vector (4 downto 0);

    rwen        : out std_logic_vector (3 downto 0);

    oen         : out std_logic;

    writen      : out std_logic;

    read        : out std_logic;

    iosn        : out std_logic;

    romsn       : out std_logic_vector (1 downto 0);

    gpio        : inout std_logic_vector(CFG_GRGPIO_WIDTH-1 downto 0);   -- I/O port

    emdio       : inout std_logic;              -- ethernet PHY interface

    etx_clk     : in std_logic;

    erx_clk     : in std_logic;

    erxd        : in std_logic_vector(3 downto 0);

    erx_dv      : in std_logic;

    erx_er      : in std_logic;

    erx_col     : in std_logic;

    erx_crs     : in std_logic;

    etxd        : out std_logic_vector(3 downto 0);

    etx_en      : out std_logic;

    etx_er      : out std_logic;

    emdc        : out std_logic;

    emddis      : out std_logic;

    epwrdwn     : out std_logic;

    ereset      : out std_logic;

    esleep      : out std_logic;

    epause      : out std_logic;

    pci_rst     : inout std_logic;              -- PCI bus

    pci_clk     : in std_logic;

    pci_gnt     : in std_logic;

    pci_idsel   : in std_logic;

    pci_lock    : inout std_logic;

    pci_ad      : inout std_logic_vector(31 downto 0);

    pci_cbe     : inout std_logic_vector(3 downto 0);

    pci_frame   : inout std_logic;

    pci_irdy    : inout std_logic;

    pci_trdy    : inout std_logic;

    pci_devsel  : inout std_logic;

    pci_stop    : inout std_logic;

    pci_perr    : inout std_logic;

    pci_par     : inout std_logic;

    pci_req     : inout std_logic;

    pci_serr    : inout std_logic;

    pci_host    : in std_logic;

    pci_66      : in std_logic;

    pci_arb_req : in  std_logic_vector(0 to 3);

    pci_arb_gnt : out std_logic_vector(0 to 3);

    can_txd     : out std_logic;

    can_rxd     : in  std_logic;

    can_stb     : out std_logic;

    spw_clk     : in  std_logic;

    spw_rxd     : in  std_logic_vector(0 to 2);

    spw_rxdn    : in  std_logic_vector(0 to 2);

    spw_rxs     : in  std_logic_vector(0 to 2);

    spw_rxsn    : in  std_logic_vector(0 to 2);

    spw_txd     : out std_logic_vector(0 to 2);

    spw_txdn    : out std_logic_vector(0 to 2);

    spw_txs     : out std_logic_vector(0 to 2);

    spw_txsn    : out std_logic_vector(0 to 2);

    tck, tms, tdi : in std_logic;

    tdo         : out std_logic

        );

end component;

signal clk : std_logic := '0';

signal Rst    : std_logic := '0';                        -- Reset

constant ct : integer := clkperiod/2;

signal address  : std_logic_vector(27 downto 0);

signal data     : std_logic_vector(31 downto 0);

signal ramsn    : std_logic_vector(4 downto 0);

signal ramoen   : std_logic_vector(4 downto 0);

signal rwen     : std_logic_vector(3 downto 0);

signal rwenx    : std_logic_vector(3 downto 0);

signal romsn    : std_logic_vector(1 downto 0);

signal iosn     : std_logic;

signal oen      : std_logic;

signal read     : std_logic;

signal writen   : std_logic;

signal brdyn    : std_logic;

signal bexcn    : std_logic;

signal wdog     : std_logic;

signal dsuen, dsutx, dsurx, dsubre, dsuact : std_logic;

signal dsurst   : std_logic;

signal test     : std_logic;

signal error    : std_logic;

signal gpio     : std_logic_vector(CFG_GRGPIO_WIDTH-1 downto 0);

signal GND      : std_logic := '0';

signal VCC      : std_logic := '1';

signal NC       : std_logic := 'Z';

signal clk2     : std_logic := '1';

signal sdcke    : std_logic_vector ( 1 downto 0);  -- clk en

signal sdcsn    : std_logic_vector ( 1 downto 0);  -- chip sel

signal sdwen    : std_logic;                       -- write en

signal sdrasn   : std_logic;                       -- row addr stb

signal sdcasn   : std_logic;                       -- col addr stb

signal sddqm    : std_logic_vector ( 7 downto 0);  -- data i/o mask

signal sdclk    : std_logic;

signal plllock    : std_logic;

signal txd1, rxd1 : std_logic;

signal txd2, rxd2 : std_logic;

signal etx_clk, erx_clk, erx_dv, erx_er, erx_col, erx_crs, etx_en, etx_er : std_logic:='0';

signal erxd, etxd: std_logic_vector(3 downto 0):=(others=>'0');

signal erxdt, etxdt: std_logic_vector(7 downto 0):=(others=>'0');

signal gtx_clk : std_logic := '0';

signal emdc, emdio: std_logic;

signal emddis   : std_logic;

signal epwrdwn  : std_logic;

signal ereset   : std_logic;

signal esleep   : std_logic;

signal epause   : std_logic;

constant lresp : boolean := false;

signal sa       : std_logic_vector(14 downto 0);

signal sd       : std_logic_vector(63 downto 0);

signal pci_arb_req, pci_arb_gnt : std_logic_vector(0 to 3);

signal can_txd  : std_logic;

signal can_rxd  : std_logic;

signal can_stb  : std_logic;

signal spw_clk  : std_logic := '0';

signal spw_rxd  : std_logic_vector(0 to 2) := "000";

signal spw_rxdn : std_logic_vector(0 to 2) := "000";

signal spw_rxs  : std_logic_vector(0 to 2) := "000";

signal spw_rxsn : std_logic_vector(0 to 2) := "000";

signal spw_txd  : std_logic_vector(0 to 2);

signal spw_txdn : std_logic_vector(0 to 2);

signal spw_txs  : std_logic_vector(0 to 2);

signal spw_txsn : std_logic_vector(0 to 2);

signal tck, tms, tdi, tdo : std_logic;

constant CFG_SDEN : integer := CFG_SDCTRL + CFG_MCTRL_SDEN ;

constant CFG_SD64 : integer := CFG_SDCTRL_SD64 + CFG_MCTRL_SD64;

begin

-- clock and reset

  spw_clk <= not spw_clk after 20 ns;

  spw_rxd(0) <= spw_txd(0); spw_rxdn(0) <= spw_txdn(0);

  spw_rxs(0) <= spw_txs(0); spw_rxsn(0) <= spw_txsn(0);

  spw_rxd(1) <= spw_txd(1); spw_rxdn(1) <= spw_txdn(1);

  spw_rxs(1) <= spw_txs(1); spw_rxsn(1) <= spw_txsn(1);

  spw_rxd(2) <= spw_txd(0); spw_rxdn(2) <= spw_txdn(2);

  spw_rxs(2) <= spw_txs(0); spw_rxsn(2) <= spw_txsn(2);

  clk <= not clk after ct * 1 ns;

  rst <= dsurst;

  dsuen <= '1'; dsubre <= '0'; rxd1 <= '1';

  --## can_rxd <= '1';

  can_rxd <= can_txd; -- CAN LOOP BACK ##

  d3 : leon3mp

        generic map ( fabtech, memtech, padtech, clktech,

        disas, dbguart, pclow )

        port map (rst, clk, sdclk,  error, address(27 downto 0), data,

        sa, sd, sdclk, sdcke, sdcsn, sdwen, sdrasn, sdcasn, sddqm,

        dsutx, dsurx, dsuen, dsubre, dsuact, txd1, rxd1, txd2, rxd2,

        ramsn, ramoen, rwen, oen, writen, read, iosn, romsn, gpio,

        emdio, etx_clk, erx_clk, erxd, erx_dv, erx_er, erx_col, erx_crs,

        etxd, etx_en, etx_er, emdc, emddis, epwrdwn, ereset, esleep, epause,

        pci_rst, pci_clk, pci_gnt, pci_idsel, pci_lock, pci_ad, pci_cbe,

        pci_frame, pci_irdy, pci_trdy, pci_devsel, pci_stop, pci_perr, pci_par,

        pci_req, pci_serr, pci_host, pci_66, pci_arb_req, pci_arb_gnt,

        can_txd, can_rxd, can_stb, spw_clk, spw_rxd, spw_rxdn, spw_rxs,

        spw_rxsn, spw_txd, spw_txdn, spw_txs, spw_txsn, tck, tms, tdi, tdo);

-- optional sdram

  sd0 : if (CFG_SDEN /= 0) and (CFG_MCTRL_SEPBUS = 0) generate

    u0: mt48lc16m16a2 generic map (index => 0, fname => sdramfile)

        PORT MAP(

            Dq => data(31 downto 16), Addr => address(14 downto 2),

            Ba => address(16 downto 15), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(0), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(3 downto 2));

    u1: mt48lc16m16a2 generic map (index => 16, fname => sdramfile)

        PORT MAP(

            Dq => data(15 downto 0), Addr => address(14 downto 2),

            Ba => address(16 downto 15), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(0), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(1 downto 0));

    u2: mt48lc16m16a2 generic map (index => 0, fname => sdramfile)

        PORT MAP(

            Dq => data(31 downto 16), Addr => address(14 downto 2),

            Ba => address(16 downto 15), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(1), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(3 downto 2));

    u3: mt48lc16m16a2 generic map (index => 16, fname => sdramfile)

        PORT MAP(

            Dq => data(15 downto 0), Addr => address(14 downto 2),

            Ba => address(16 downto 15), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(1), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(1 downto 0));

  end generate;

  sd1 : if (CFG_SDEN /= 0) and (CFG_MCTRL_SEPBUS = 1) generate

    u0: mt48lc16m16a2 generic map (index => 0, fname => sdramfile)

        PORT MAP(

            Dq => sd(31 downto 16), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(0), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(3 downto 2));

    u1: mt48lc16m16a2 generic map (index => 16, fname => sdramfile)

        PORT MAP(

            Dq => sd(15 downto 0), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(0), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(1 downto 0));

    u2: mt48lc16m16a2 generic map (index => 0, fname => sdramfile)

        PORT MAP(

            Dq => sd(31 downto 16), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(1), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(3 downto 2));

    u3: mt48lc16m16a2 generic map (index => 16, fname => sdramfile)

        PORT MAP(

            Dq => sd(15 downto 0), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(1), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(1 downto 0));

    sd64 : if (CFG_SD64 /= 0) generate

      u4: mt48lc16m16a2 generic map (index => 0, fname => sdramfile)

        PORT MAP(

            Dq => sd(63 downto 48), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(0), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(7 downto 6));

      u5: mt48lc16m16a2 generic map (index => 16, fname => sdramfile)

        PORT MAP(

            Dq => sd(47 downto 32), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(0), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(5 downto 4));

      u6: mt48lc16m16a2 generic map (index => 0, fname => sdramfile)

        PORT MAP(

            Dq => sd(63 downto 48), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(1), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(7 downto 6));

      u7: mt48lc16m16a2 generic map (index => 16, fname => sdramfile)

        PORT MAP(

            Dq => sd(47 downto 32), Addr => sa(12 downto 0),

            Ba => sa(14 downto 13), Clk => sdclk, Cke => sdcke(0),

            Cs_n => sdcsn(1), Ras_n => sdrasn, Cas_n => sdcasn, We_n => sdwen,

            Dqm => sddqm(5 downto 4));

    end generate;

  end generate;

    prom0 : for i in 0 to (romwidth/8)-1 generate

      sr0 : sram generic map (index => i, abits => romdepth, fname => promfile)

        port map (address(romdepth+1 downto 2), data(31-i*8 downto 24-i*8), romsn(0),

                  rwen(i), oen);

    end generate;

  sbanks : for k in 0 to srambanks-1 generate

    sram0 : for i in 0 to (sramwidth/8)-1 generate

      sr0 : sram generic map (index => i, abits => sramdepth, fname => sramfile)

        port map (address(sramdepth+1 downto 2), data(31-i*8 downto 24-i*8),

                ramsn(k), rwen(i), ramoen(k));

    end generate;

  end generate;

  emdio <= 'H';

  erxd <= erxdt(3 downto 0);

  etxdt <= "0000" & etxd;

  p0: phy

    generic map(base1000_t_fd => 0, base1000_t_hd => 0)

    port map(rst, emdio, etx_clk, erx_clk, erxdt, erx_dv,

      erx_er, erx_col, erx_crs, etxdt, etx_en, etx_er, emdc, gtx_clk);

  error <= 'H';                   -- ERROR pull-up

   iuerr : process

   begin

     wait for 2500 ns;

     if to_x01(error) = '1' then wait on error; end if;

     assert (to_x01(error) = '1')

       report "*** IU in error mode, simulation halted ***"

         severity failure ;

   end process;

  data <= buskeep(data), (others => 'H') after 250 ns;

  sd <= buskeep(sd), (others => 'H') after 250 ns;

  test0 :  grtestmod

    port map ( rst, clk, error, address(21 downto 2), data,

               iosn, oen, writen, brdyn);

  dsucom : process

    procedure dsucfg(signal dsurx : in std_logic; signal dsutx : out std_logic) is

    variable w32 : std_logic_vector(31 downto 0);

    variable c8  : std_logic_vector(7 downto 0);

    constant txp : time := 160 * 1 ns;

    begin

    dsutx <= '1';

    dsurst <= '0';

    wait for 500 ns;

    dsurst <= '1';

--    wait;

    wait for 355000 ns;

    txc(dsutx, 16#55#, txp);            -- sync uart

--    txc(dsutx, 16#c0#, txp);

--    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#00#, txp);

--    txa(dsutx, 16#00#, 16#00#, 16#02#, 16#ae#, txp);

--    txc(dsutx, 16#c0#, txp);

--    txa(dsutx, 16#91#, 16#00#, 16#00#, 16#00#, txp);

--    txa(dsutx, 16#00#, 16#00#, 16#06#, 16#ae#, txp);

--    txc(dsutx, 16#c0#, txp);

--    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#24#, txp);

--    txa(dsutx, 16#00#, 16#00#, 16#06#, 16#03#, txp);

--    txc(dsutx, 16#c0#, txp);

--    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#20#, txp);

--    txa(dsutx, 16#00#, 16#00#, 16#06#, 16#fc#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#40#, 16#0F#, 16#DD#, 16#94#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#2f#, txp);

    wait;

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#00#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#2f#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#91#, 16#00#, 16#00#, 16#00#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#6f#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#11#, 16#00#, 16#00#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#00#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#40#, 16#00#, 16#04#, txp);

    txa(dsutx, 16#00#, 16#02#, 16#20#, 16#01#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#20#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#02#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#20#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#0f#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#40#, 16#00#, 16#43#, 16#10#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#0f#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#91#, 16#40#, 16#00#, 16#24#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#24#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#91#, 16#70#, 16#00#, 16#00#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#03#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#20#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#ff#, 16#ff#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#40#, 16#00#, 16#48#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#00#, 16#12#, txp);

    txc(dsutx, 16#c0#, txp);

    txa(dsutx, 16#90#, 16#40#, 16#00#, 16#60#, txp);

    txa(dsutx, 16#00#, 16#00#, 16#12#, 16#10#, txp);

    txc(dsutx, 16#80#, txp);

    txa(dsutx, 16#90#, 16#00#, 16#00#, 16#00#, txp);

    rxi(dsurx, w32, txp, lresp);

    txc(dsutx, 16#a0#, txp);

    txa(dsutx, 16#40#, 16#00#, 16#00#, 16#00#, txp);

    rxi(dsurx, w32, txp, lresp);

    end;

  begin

    dsucfg(dsutx, dsurx);

    wait;

  end process;

  jtagproc : process

  begin

    wait;

    jtagcom(tdo, tck, tms, tdi, 100, 20, 16#40000000#, true);

    wait;

   end process;

end;