Subversion Repositories avr_hp

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--      Simple testbench for AVR CM2 core running program_a.dec

--      and program_b.dec

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LIBRARY IEEE;

USE IEEE.std_logic_1164.all;

USE IEEE.std_logic_arith.all;

USE IEEE.std_logic_textio.all;

USE std.textio.all;

USE WORK.all;

LIBRARY STD;

USE STD.TEXTIO.ALL;

entity avr_cm2_test is

end avr_cm2_test;

architecture behavioral of avr_cm2_test is

constant MAX_ROM_SIZE : positive := 256;

constant MAX_RAM_SIZE : positive := 65536;

file inFile_a : Text open read_mode is "program_a.dec";

file inFile_b : Text open read_mode is "program_b.dec";

signal system_clk       : std_logic;

signal system_reset : Std_logic;

signal cp2 : std_logic;

signal cp2_cml_1 : std_logic;

signal cml : integer range 0 to 1;

signal cml0_clk : std_logic;

signal cml1_clk : std_logic;

signal cml0_reset : std_logic;

signal cml1_reset : std_logic;

signal disable_second : std_logic;

signal core_pc_0   : std_logic_vector (15 downto 0);

signal core_pc_1   : std_logic_vector (15 downto 0);

signal core_ramadr_0 : std_logic_vector (15 downto 0);

signal core_ramadr_1 : std_logic_vector (15 downto 0);

signal core_ramre_0 : std_logic;

signal core_ramre_1 : std_logic;

signal core_ramwe_0 : std_logic;

signal core_ramwe_1 : std_logic;

signal gnd : std_logic;

signal vcc : std_logic;

signal core_pc : std_logic_vector (15 downto 0);

signal core_inst : std_logic_vector (15 downto 0);

signal core_adr : std_logic_vector (5 downto 0);

signal core_iore : std_logic;

signal core_iowe : std_logic;

signal core_ramadr : std_logic_vector (15 downto 0);

signal core_ramre : std_logic;

signal core_ramwe : std_logic;

signal core_cpuwait : std_logic;

signal core_dbusin : std_logic_vector (7 downto 0);

signal core_dbusout : std_logic_vector (7 downto 0);

signal core_irqlines : std_logic_vector(22 downto 0);

signal core_irqack : std_logic;

signal core_irqackad : std_logic_vector(4 downto 0);

signal sleepi : std_logic;

signal irqok : std_logic;

signal globint : std_logic;

signal core_wdri : std_logic;

component AVR_Core is port(

        --Clock and reset

                cp2 : in  std_logic;

                cp2en : in  std_logic;

                ireset : in  std_logic;

        -- JTAG OCD support

                valid_instr : out std_logic;

                insert_nop : in  std_logic;

                block_irq : in  std_logic;

                change_flow : out std_logic;

        -- Program Memory

                pc : out std_logic_vector(15 downto 0);

                inst : in  std_logic_vector(15 downto 0);

        -- I/O control

                adr : out std_logic_vector(5 downto 0);

                iore : out std_logic;

                iowe : out std_logic;

        -- Data memory control

                ramadr : out std_logic_vector(15 downto 0);

                ramre : out std_logic;

                ramwe : out std_logic;

                cpuwait : in  std_logic;

        -- Data paths

                dbusin : in  std_logic_vector(7 downto 0);

                dbusout : out std_logic_vector(7 downto 0);

        -- Interrupt

                irqlines : in  std_logic_vector(22 downto 0);

                irqack : out std_logic;

                irqackad : out std_logic_vector(4 downto 0);

        --Sleep Control

                sleepi : out std_logic;

                irqok   : out std_logic;

                globint : out std_logic;

        --Watchdog

                wdri : out std_logic);

end component;

component AVR_Core_cm2 is port(

                cp2_cml_1 : in std_logic;

        --Clock and reset

                cp2 : in  std_logic;

                cp2en : in  std_logic;

                ireset : in  std_logic;

        -- JTAG OCD support

                valid_instr : out std_logic;

                insert_nop : in  std_logic;

                block_irq : in  std_logic;

                change_flow : out std_logic;

        -- Program Memory

                pc : out std_logic_vector(15 downto 0);

                inst : in  std_logic_vector(15 downto 0);

        -- I/O control

                adr : out std_logic_vector(5 downto 0);

                iore : out std_logic;

                iowe : out std_logic;

        -- Data memory control

                ramadr : out std_logic_vector(15 downto 0);

                ramre : out std_logic;

                ramwe : out std_logic;

                cpuwait : in  std_logic;

        -- Data paths

                dbusin : in  std_logic_vector(7 downto 0);

                dbusout : out std_logic_vector(7 downto 0);

        -- Interrupt

                irqlines : in  std_logic_vector(22 downto 0);

                irqack : out std_logic;

                irqackad : out std_logic_vector(4 downto 0);

        --Sleep Control

                sleepi : out std_logic;

                irqok   : out std_logic;

                globint : out std_logic;

        --Watchdog

                wdri : out std_logic);

end component;

TYPE std_logic_array_rom IS ARRAY (INTEGER RANGE 0 to (2 * MAX_ROM_SIZE) - 1) of Std_logic_vector(15 downto 0);

SIGNAL rom_array :Std_logic_array_rom;

TYPE std_logic_array_ram IS ARRAY (INTEGER RANGE 0 to (2 * MAX_RAM_SIZE) - 1) of Std_logic_vector(7 downto 0);

SIGNAL ram_array :Std_logic_array_ram;

BEGIN

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

--      CML indicates current pipe

--      clocks for AVR Core CM2

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

cml_gen : process (system_clk)

begin

if (system_clk'event and system_clk = '1') then

        if (disable_second = '0') then

                cp2 <= system_clk;

                cp2_cml_1 <= system_clk;

        else

                if (cml = 1) then

                        cp2 <= system_clk;

                else

                        cp2_cml_1 <= system_clk;

                end if;

        end if;

        if (cml = 1) then

                cml <= 0;

        else

                cml <= 1;

        end if;

end if;

if (system_clk'event and system_clk = '0') then

        cp2 <= '0';

        cp2_cml_1 <= '0';

end if;

end process;

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

--      stimuli

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

vcc <= '1';

gnd <= '0';

core_cpuwait <= '0';

core_irqlines <= "00000000000000000000000";

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

--      ROM

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

rom_read_gen:PROCESS

variable thisInt : integer range 0 to 65535;

variable i: integer;

variable inLine: Line;

BEGIN

        readline(inFile_a, inLine);

        read(inLine, thisInt);

        for i in 0 to thisInt - 1 loop

                readline(inFile_a, inLine);

                read(inLine, thisInt);

                rom_array(i) <= conv_std_logic_vector(conv_unsigned(thisInt, 16), 16);

        end loop;

        readline(inFile_b, inLine);

        read(inLine, thisInt);

        for i in 0 to thisInt - 1 loop

                readline(inFile_b, inLine);

                read(inLine, thisInt);

                rom_array(MAX_ROM_SIZE + i) <= conv_std_logic_vector(conv_unsigned(thisInt, 16), 16);

        end loop;

      WAIT FOR 8000 ms;

end process;

core_inst_gen : PROCESS(core_pc, cml)

BEGIN

        if (cml = 0) then

                core_inst <=    rom_array(conv_integer(unsigned(core_pc)))(7 downto 0) &

                                        rom_array(conv_integer(unsigned(core_pc)))(15 downto 8);

        else

                core_inst <=    rom_array(MAX_ROM_SIZE + conv_integer(unsigned(core_pc)))(7 downto 0) &

                                        rom_array(MAX_ROM_SIZE + conv_integer(unsigned(core_pc)))(15 downto 8);

        end if;

end process;

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

--      RAM

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

ram_gen : PROCESS(system_clk, system_reset)

variable i: integer;

BEGIN

if (system_reset = '0') then

        if (disable_second = '0') then

                for i in 0 to (2 * MAX_RAM_SIZE) - 1 loop

                        ram_array(i) <= conv_std_logic_vector(0, 8);

                end loop;

        end if;

else

if (system_clk'event and system_clk = '1') then

        if (core_ramwe = '1') then

                if (cml = 0) then

                        ram_array(conv_integer(unsigned(core_ramadr))) <= core_dbusout;

                else

                        ram_array(MAX_RAM_SIZE + conv_integer(unsigned(core_ramadr))) <= core_dbusout;

                end if;

        end if;

end if;

end if;

end process;

core_dbusin <=  ram_array(conv_integer(unsigned(core_ramadr)))  when (cml = 0) else

                        ram_array(MAX_RAM_SIZE + conv_integer(unsigned(core_ramadr)));

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

--      system_clk

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

clk_gen:PROCESS

VARIABLE lin:line;

   BEGIN

      system_clk <= '1';

      WAIT FOR 12 ns;

      system_clk <= '0';

      WAIT FOR 12 ns;

   END PROCESS;

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

--      system_reset and kill/restart second core

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

reset_gen:PROCESS

   BEGIN

      system_reset <= '0';

        disable_second <= '0';

      WAIT FOR 110 ns;

      system_reset <= '1' ;

      WAIT FOR 100000 ns;

        WAIT UNTIL (cml = 0);

        disable_second <= '1';

      WAIT FOR 100000 ns;

        WAIT UNTIL (cml = 0);

        WAIT UNTIL (system_clk = '1');

      system_reset <= '0';

        WAIT UNTIL (system_clk = '0');

      WAIT FOR 2 ns;

      system_reset <= '1' ;

      WAIT FOR 2 ns;

        disable_second <= '0';

      WAIT FOR 100000 ns;

      ASSERT false REPORT "test passed, done" severity failure;

   END PROCESS;

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

--      AVR_Core CM2

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

AVR_Core_Inst_cm2:  AVR_Core_cm2 port map(

                cp2_cml_1 => cp2_cml_1,

        --Clock and reset

                cp2 => cp2,

                cp2en => vcc,

                ireset => cml1_reset,

        -- JTAG OCD support

                valid_instr => open,

                insert_nop => gnd,

                block_irq => gnd,

                change_flow => open,

        -- Program Memory

                pc => core_pc,

                inst => core_inst,

        -- I/O control

                adr => core_adr,

                iore => core_iore,

                iowe => core_iowe,

        -- Data memory control

                ramadr => core_ramadr,

                ramre => core_ramre,

                ramwe => core_ramwe,

                cpuwait => core_cpuwait,

        -- Data paths

                dbusin => core_dbusin,

                dbusout => core_dbusout,

        -- Interrupts

                irqlines => core_irqlines,

                irqack => core_irqack,

                irqackad => core_irqackad,

        --Sleep Control

                sleepi => sleepi,

                irqok   => irqok,

                globint => globint,

        --Watchdog

                wdri => core_wdri);

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

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

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

--      Insertion of 2 additional AVR cores for virtual debugging

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

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

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

--      generate individual clocks for AVR 0 and 1

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

subckl_gen : process (system_clk)

begin

if (cml = 0) then

        cml0_clk <= system_clk;

        cml1_clk <= '0';

else

        cml0_clk <= '0';

        if (disable_second = '0') then

                cml1_clk <= system_clk;

        end if;

end if;

end process;

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

--      generate individual resets for AVR 0 and 1

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

system_reset_in_gen : PROCESS(system_clk, system_reset, disable_second)

BEGIN

if (disable_second = '0') then

        if (system_clk'event and system_clk = '0') then

                cml1_reset <= cml0_reset;

                cml0_reset <= system_reset;

        end if;

else

        cml1_reset <= system_reset;

end if;

end process;

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

--      output comparison

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

check_gen : PROCESS(system_clk, system_reset)

BEGIN

if (system_reset = '1') then

if (system_clk'event and system_clk = '0') then

        if (cml = 0) then

                if NOT (core_pc = core_pc_0) then

                        ASSERT false REPORT "PC 0 mismatch" severity failure;

                end if;

                if NOT (core_ramadr = core_ramadr_0) then

                        ASSERT false REPORT "RAMADR 0 mismatch" severity failure;

                end if;

                if NOT (core_ramre = core_ramre_0) then

                        ASSERT false REPORT "RAMRE 0 mismatch" severity failure;

                end if;

                if NOT (core_ramwe = core_ramwe_0) then

                        ASSERT false REPORT "RAMWE 0 mismatch" severity failure;

                end if;

        else

                if (disable_second = '0') then

                        if NOT (core_pc = core_pc_1) then

                                ASSERT false REPORT "PC 1 mismatch" severity failure;

                        end if;

                        if NOT (core_ramadr = core_ramadr_1) then

                                ASSERT false REPORT "RAMADR 1 mismatch" severity failure;

                        end if;

                        if NOT (core_ramre = core_ramre_1) then

                                ASSERT false REPORT "RAMRE 1 mismatch" severity failure;

                        end if;

                        if NOT (core_ramwe = core_ramwe_1) then

                                ASSERT false REPORT "RAMWE 1 mismatch" severity failure;

                        end if;

                end if;

        end if;

end if;

end if;

end process;

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

--      AVR_Core virtual 0

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

AVR_Core_Inst_0:  AVR_Core port map(

        --Clock and reset

                cp2 => cml0_clk,

                cp2en => vcc,

                ireset => cml0_reset,

        -- JTAG OCD support

                valid_instr => open,

                insert_nop => gnd,

                block_irq => gnd,

                change_flow => open,

        -- Program Memory

                pc => core_pc_0,

                inst => core_inst,

        -- I/O control

                adr => open,

                iore => open,

                iowe => open,

        -- Data memory control

                ramadr => core_ramadr_0,

                ramre => core_ramre_0,

                ramwe => core_ramwe_0,

                cpuwait => core_cpuwait,

        -- Data paths

                dbusin => core_dbusin,

                dbusout => open,

        -- Interrupts

                irqlines => core_irqlines,

                irqack => open,

                irqackad => open,

        --Sleep Control

                sleepi => open,

                irqok   => open,

                globint => open,

        --Watchdog

                wdri => open);

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

--      AVR_Core virtual 1

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

AVR_Core_Inst_1:  AVR_Core port map(

        --Clock and reset

                cp2 => cml1_clk,

                cp2en => vcc,

                ireset => cml1_reset,

        -- JTAG OCD support

                valid_instr => open,

                insert_nop => gnd,

                block_irq => gnd,

                change_flow => open,

        -- Program Memory

                pc => core_pc_1,

                inst => core_inst,

        -- I/O control

                adr => open,

                iore => open,

                iowe => open,

        -- Data memory control

                ramadr => core_ramadr_1,

                ramre => core_ramre_1,

                ramwe => core_ramwe_1,

                cpuwait => core_cpuwait,

        -- Data paths

                dbusin => core_dbusin,

                dbusout => open,

        -- Interrupts

                irqlines => core_irqlines,

                irqack => open,

                irqackad => open,

        --Sleep Control

                sleepi => open,

                irqok   => open,

                globint => open,

        --Watchdog

                wdri => open);

end behavioral;