Subversion Repositories gpib_controller

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

--This file is part of fpga_gpib_controller.

--

-- Fpga_gpib_controller 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 3 of the License, or

-- (at your option) any later version.

--

-- Fpga_gpib_controller 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.

-- You should have received a copy of the GNU General Public License

-- along with Fpga_gpib_controller.  If not, see <http://www.gnu.org/licenses/>.

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

-- Author: Andrzej Paluch

--

-- Create Date:   23:21:05 10/21/2011

-- Design Name:   

-- Module Name:   /windows/h/projekty/elektronika/USB_to_HPIB/usbToHpib/test_scr//gpibInterfaceTest.vhd

-- Project Name:  usbToHpib

-- Target Device:  

-- Tool versions:  

-- Description:   

-- 

-- VHDL Test Bench Created by ISE for module: gpibInterface

-- 

-- Dependencies:

-- 

-- Revision:

-- Revision 0.01 - File Created

-- Additional Comments:

--

-- Notes: 

-- This testbench has been automatically generated using types std_logic and

-- std_logic_vector for the ports of the unit under test.  Xilinx recommends

-- that these types always be used for the top-level I/O of a design in order

-- to guarantee that the testbench will bind correctly to the post-implementation 

-- simulation model.

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

LIBRARY ieee;

USE ieee.std_logic_1164.ALL;

USE ieee.std_logic_unsigned.all;

USE ieee.numeric_std.ALL;

use work.gpibComponents.all;

use work.helperComponents.all;

ENTITY gpibWriterReaderTest IS

END gpibWriterReaderTest;

ARCHITECTURE behavior OF gpibWriterReaderTest IS

        -- Component Declaration for the Unit Under Test (UUT)

        component gpibCableEmulator is port (

                -- interface signals

                DIO_1 : in std_logic_vector (7 downto 0);

                output_valid_1 : in std_logic;

                DIO_2 : in std_logic_vector (7 downto 0);

                output_valid_2 : in std_logic;

                DIO : out std_logic_vector (7 downto 0);

                -- attention

                ATN_1 : in std_logic;

                ATN_2 : in std_logic;

                ATN : out std_logic;

                -- data valid

                DAV_1 : in std_logic;

                DAV_2 : in std_logic;

                DAV : out std_logic;

                -- not ready for data

                NRFD_1 : in std_logic;

                NRFD_2 : in std_logic;

                NRFD : out std_logic;

                -- no data accepted

                NDAC_1 : in std_logic;

                NDAC_2 : in std_logic;

                NDAC : out std_logic;

                -- end or identify

                EOI_1 : in std_logic;

                EOI_2 : in std_logic;

                EOI : out std_logic;

                -- service request

                SRQ_1 : in std_logic;

                SRQ_2 : in std_logic;

                SRQ : out std_logic;

                -- interface clear

                IFC_1 : in std_logic;

                IFC_2 : in std_logic;

                IFC : out std_logic;

                -- remote enable

                REN_1 : in std_logic;

                REN_2 : in std_logic;

                REN : out std_logic

        );

        end component;

        -- inputs common

        signal clk : std_logic := '0';

        signal reset : std_logic := '0';

        signal T1 : std_logic_vector(7 downto 0) := "00000100";

        -- inputs 1

        signal data_1 : std_logic_vector(7 downto 0) := (others => '0');

        signal status_byte_1 : std_logic_vector(7 downto 0) := (others => '0');

        signal rdy_1 : std_logic := '0';

        signal nba_1 : std_logic := '0';

        signal ltn_1 : std_logic := '0';

        signal lun_1 : std_logic := '0';

        signal lon_1 : std_logic := '0';

        signal ton_1 : std_logic := '0';

        signal endOf_1 : std_logic := '0';

        signal gts_1 : std_logic := '0';

        signal rpp_1 : std_logic := '0';

        signal tcs_1 : std_logic := '0';

        signal tca_1 : std_logic := '0';

        signal sic_1 : std_logic := '0';

        signal rsc_1 : std_logic := '0';

        signal sre_1 : std_logic := '0';

        signal rtl_1 : std_logic := '0';

        signal rsv_1 : std_logic := '0';

        signal ist_1 : std_logic := '0';

        signal lpe_1 : std_logic := '0';

        -- inputs 2

        signal data_2 : std_logic_vector(7 downto 0) := (others => '0');

        signal status_byte_2 : std_logic_vector(7 downto 0) := (others => '0');

        signal rdy_2 : std_logic := '0';

        signal nba_2 : std_logic := '0';

        signal ltn_2 : std_logic := '0';

        signal lun_2 : std_logic := '0';

        signal lon_2 : std_logic := '0';

        signal ton_2 : std_logic := '0';

        signal endOf_2 : std_logic := '0';

        signal gts_2 : std_logic := '0';

        signal rpp_2 : std_logic := '0';

        signal tcs_2 : std_logic := '0';

        signal tca_2 : std_logic := '0';

        signal sic_2 : std_logic := '0';

        signal rsc_2 : std_logic := '0';

        signal sre_2 : std_logic := '0';

        signal rtl_2 : std_logic := '0';

        signal rsv_2 : std_logic := '0';

        signal ist_2 : std_logic := '0';

        signal lpe_2 : std_logic := '0';

        -- outputs 1

        signal dvd_1 : std_logic;

        signal wnc_1 : std_logic;

        signal tac_1 : std_logic;

        signal lac_1 : std_logic;

        signal cwrc_1 : std_logic;

        signal cwrd_1 : std_logic;

        signal clr_1 : std_logic;

        signal trg_1 : std_logic;

        signal atl_1 : std_logic;

        signal att_1 : std_logic;

        signal mla_1 : std_logic;

        signal lsb_1 : std_logic;

        signal spa_1 : std_logic;

        signal ppr_1 : std_logic;

        signal sreq_1 : std_logic;

        signal isLocal_1 : std_logic;

        signal currentSecAddr_1 : std_logic_vector (4 downto 0);

        -- outputs 2

        signal dvd_2 : std_logic;

        signal wnc_2 : std_logic;

        signal tac_2 : std_logic;

        signal lac_2 : std_logic;

        signal cwrc_2 : std_logic;

        signal cwrd_2 : std_logic;

        signal clr_2 : std_logic;

        signal trg_2 : std_logic;

        signal atl_2 : std_logic;

        signal att_2 : std_logic;

        signal mla_2 : std_logic;

        signal lsb_2 : std_logic;

        signal spa_2 : std_logic;

        signal ppr_2 : std_logic;

        signal sreq_2 : std_logic;

        signal isLocal_2 : std_logic;

        signal currentSecAddr_2 : std_logic_vector (4 downto 0);

        -- common

        signal DO : std_logic_vector (7 downto 0);

        signal DI_1 : std_logic_vector (7 downto 0);

        signal output_valid_1 : std_logic;

        signal DI_2 : std_logic_vector (7 downto 0);

        signal output_valid_2 : std_logic;

        signal ATN_1, ATN_2, ATN : std_logic;

        signal DAV_1, DAV_2, DAV : std_logic;

        signal NRFD_1, NRFD_2, NRFD : std_logic;

        signal NDAC_1, NDAC_2, NDAC : std_logic;

        signal EOI_1, EOI_2, EOI : std_logic;

        signal SRQ_1, SRQ_2, SRQ : std_logic;

        signal IFC_1, IFC_2, IFC : std_logic;

        signal REN_1, REN_2, REN : std_logic;

        type WR_BUF_TYPE is

                array (0 to 15) of std_logic_vector (7 downto 0);

        -- gpib reader

        signal buf_interrupt : std_logic;

        signal data_available : std_logic;

        signal last_byte_addr : std_logic_vector (3 downto 0);

        signal end_of_stream : std_logic;

        signal byte_addr : std_logic_vector (3 downto 0);

        signal data_out : std_logic_vector (7 downto 0);

        signal reset_buffer : std_logic := '0';

        signal dataSecAddr : std_logic_vector (4 downto 0);

        signal buf_strobe : std_logic;

        signal buffer_byte_mode : std_logic;

        signal read_buffer : WR_BUF_TYPE;

        -- gpib writer

        signal w_last_byte_addr : std_logic_vector (3 downto 0)

                := (others => '0');

        signal w_end_of_stream : std_logic := '0';

        signal w_data_available : std_logic := '0';

        signal w_buf_interrupt : std_logic;

        signal w_data_in : std_logic_vector (7 downto 0);

        signal w_byte_addr : std_logic_vector (3 downto 0);

        signal w_reset_buffer : std_logic := '0';

        signal w_buffer_byte_mode : std_logic;

        signal w_write_buffer : WR_BUF_TYPE;

        -- Clock period definitions

        constant clk_period : time := 2ps;

BEGIN

        -- Instantiate the Unit Under Test (UUT)

        gpib1: gpibInterface PORT MAP (

                clk => clk,

                reset => reset,

                isLE => '0',

                isTE => '0',

                lpeUsed => '0',

                fixedPpLine => "000",

                eosUsed => '0',

                eosMark => "00000000",

                myListAddr => "00001",

                myTalkAddr => "00001",

                secAddrMask => (others => '0'),

                data => data_1,

                status_byte => status_byte_1,

                T1 => T1,

                rdy => rdy_1,

                nba => nba_1,

                ltn => ltn_1,

                lun => lun_1,

                lon => lon_1,

                ton => ton_1,

                endOf => endOf_1,

                gts => gts_1,

                rpp => rpp_1,

                tcs => tcs_1,

                tca => tca_1,

                sic => sic_1,

                rsc => rsc_1,

                sre => sre_1,

                rtl => rtl_1,

                rsv => rsv_1,

                ist => ist_1,

                lpe => lpe_1,

                dvd => dvd_1,

                wnc => wnc_1,

                tac => tac_1,

                lac => lac_1,

                cwrc => cwrc_1,

                cwrd => cwrd_1,

                clr => clr_1,

                trg => trg_1,

                atl => atl_1,

                att => att_1,

                mla => mla_1,

                lsb => lsb_1,

                spa => spa_1,

                ppr => ppr_1,

                sreq => sreq_1,

                isLocal => isLocal_1,

                currentSecAddr => currentSecAddr_1,

                DI => DO,

                DO => DI_1,

                output_valid => output_valid_1,

                ATN_in => ATN,

                ATN_out => ATN_1,

                DAV_in => DAV,

                DAV_out => DAV_1,

                NRFD_in => NRFD,

                NRFD_out => NRFD_1,

                NDAC_in => NDAC,

                NDAC_out => NDAC_1,

                EOI_in => EOI,

                EOI_out => EOI_1,

                SRQ_in => SRQ,

                SRQ_out => SRQ_1,

                IFC_in => IFC,

                IFC_out => IFC_1,

                REN_in => REN,

                REN_out => REN_1

                );

        -- Instantiate the Unit Under Test (UUT)

        gpib2: gpibInterface PORT MAP (

                clk => clk,

                reset => reset,

                isLE => '0',

                isTE => '0',

                lpeUsed => '0',

                fixedPpLine => "000",

                eosUsed => '0',

                eosMark => "00000000",

                myListAddr => "00010",

                myTalkAddr => "00010",

                secAddrMask => (others => '0'),

                data => data_2,

                status_byte => status_byte_2,

                T1 => T1,

                rdy => rdy_2,

                nba => nba_2,

                ltn => ltn_2,

                lun => lun_2,

                lon => lon_2,

                ton => ton_2,

                endOf => endOf_2,

                gts => gts_2,

                rpp => rpp_2,

                tcs => tcs_2,

                tca => tca_2,

                sic => sic_2,

                rsc => rsc_2,

                sre => sre_2,

                rtl => rtl_2,

                rsv => rsv_2,

                ist => ist_2,

                lpe => lpe_2,

                dvd => dvd_2,

                wnc => wnc_2,

                tac => tac_2,

                lac => lac_2,

                cwrc => cwrc_2,

                cwrd => cwrd_2,

                clr => clr_2,

                trg => trg_2,

                atl => atl_2,

                att => att_2,

                mla => mla_2,

                lsb => lsb_2,

                spa => spa_2,

                ppr => ppr_2,

                sreq => sreq_2,

                isLocal => isLocal_2,

                currentSecAddr => currentSecAddr_2,

                DI => DO,

                DO => DI_2,

                output_valid => output_valid_2,

                ATN_in => ATN,

                ATN_out => ATN_2,

                DAV_in => DAV,

                DAV_out => DAV_2,

                NRFD_in => NRFD,

                NRFD_out => NRFD_2,

                NDAC_in => NDAC,

                NDAC_out => NDAC_2,

                EOI_in => EOI,

                EOI_out => EOI_2,

                SRQ_in => SRQ,

                SRQ_out => SRQ_2,

                IFC_in => IFC,

                IFC_out => IFC_2,

                REN_in => REN,

                REN_out => REN_2

                );

        ce: gpibCableEmulator port map (

                -- interface signals

                DIO_1 => DI_1,

                output_valid_1 => output_valid_1,

                DIO_2 => DI_2,

                output_valid_2 => output_valid_2,

                DIO => DO,

                -- attention

                ATN_1 => ATN_1, ATN_2 => ATN_2, ATN => ATN,

                DAV_1 => DAV_1, DAV_2 => DAV_2, DAV => DAV,

                NRFD_1 => NRFD_1, NRFD_2 => NRFD_2, NRFD => NRFD,

                NDAC_1 => NDAC_1, NDAC_2 => NDAC_2, NDAC => NDAC,

                EOI_1 => EOI_1, EOI_2 => EOI_2, EOI => EOI,

                SRQ_1 => SRQ_1, SRQ_2 => SRQ_2, SRQ => SRQ,

                IFC_1 => IFC_1, IFC_2 => IFC_2, IFC => IFC,

                REN_1 => REN_1, REN_2 => REN_2, REN => REN

        );

        process (buf_strobe) begin

                if rising_edge(buf_strobe) then

                        read_buffer(conv_integer(w_byte_addr)) <= data_out;

                end if;

        end process;

        gr: gpibReader generic map (ADDR_WIDTH => 4) port map (

                clk => clk, reset => reset,

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

                ------ GPIB interface --------------------------------------------------

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

                data_in => DO, dvd => dvd_2, lac => lac_2, lsb => lsb_2, rdy => rdy_2,

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

                ------ external interface ----------------------------------------------

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

                isLE => '0', secAddr => (others => '0'), dataSecAddr => dataSecAddr,

                buf_interrupt => buf_interrupt, data_available => data_available,

                last_byte_addr => last_byte_addr, end_of_stream => end_of_stream,

                byte_addr => byte_addr, data_out => data_out,

                buf_strobe => buf_strobe, buffer_byte_mode => buffer_byte_mode,

                reset_buffer => reset_buffer

        );

        w_data_in <= w_write_buffer(conv_integer(w_byte_addr));

        gw: gpibWriter generic map (ADDR_WIDTH => 4) port map (

                        clk => clk, reset => reset,

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

                        ------ GPIB interface --------------------------------------------------

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

                        data_out => data_1, wnc => wnc_1, spa => spa_1, nba => nba_1,

                        endOf => endOf_1, tac => tac_1, cwrc => cwrc_1,

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

                        ------ external interface ----------------------------------------------

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

                        isTE => '0', secAddr => (others => '0'), dataSecAddr => (others => '0'),

                        last_byte_addr => w_last_byte_addr, end_of_stream => w_end_of_stream,

                        data_available => w_data_available, buf_interrupt => w_buf_interrupt,

                        data_in => w_data_in, byte_addr => w_byte_addr,

                        buffer_byte_mode => w_buffer_byte_mode,

                        reset_buffer => w_reset_buffer

                );

        -- Clock process definitions

        clk_process :process

        begin

                clk <= '0';

                wait for clk_period/2;

                clk <= '1';

                wait for clk_period/2;

        end process;

        -- Stimulus process

        stim_proc: process

        begin

                -- hold reset state for 10 clock periods.

                reset <= '1';

                wait for clk_period*10;

                reset <= '0';

                wait for clk_period*10;

                -- requests system control

                rsc_1 <= '1';

                -- interface clear

                sic_1 <= '1';

                wait until IFC_1 = '1';

                sic_1 <= '0';

                wait until IFC_1 = '0';

                -- gpib2 to listen

                w_write_buffer(0) <= "00100010";

                -- gpib1 to talk

                w_write_buffer(1) <= "01000001";

                w_last_byte_addr <= "0001";

                w_end_of_stream <= '1';

                w_data_available <= '1';

                wait until w_buf_interrupt='1';

                gts_1 <= '1';

                wait until ATN='0';

                w_reset_buffer <= '1';

                wait for clk_period*2;

                w_reset_buffer <= '0';

                wait for clk_period*1;

                w_write_buffer(0) <= "10101010";

                w_write_buffer(1) <= "01010101";

                w_write_buffer(2) <= "11111111";

                w_last_byte_addr <= "0010";

                w_data_available <= '1';

                wait until buf_interrupt='1';

                wait for clk_period*1;

                assert read_buffer(0) = "10101010";

                wait for clk_period*1;

                assert read_buffer(1) = "01010101";

                wait for clk_period*1;

                assert read_buffer(2) = "11111111";

                report "$$$ END OF TEST - write read $$$";

                wait;

        end process;

END;