単純なシンクロナスデュアルポートRAMのVHDLビヘイビアモデルです。
私がFPGA/ASIC用の回路を設計しているときに比較的多用するデュアルポートメモリのモデルです。
論理合成ツールによってはそのまま合成できる場合がありますが、大抵の場合思うようにいきません。
うまく合成できない場合は、sdpram_model.vhdをFPGA/ASICベンダーが提供するメモリを使ったものに 差し替えて合成します。 Xilinx社FPGA用のモデルはこちらです。( https://gist.github.com/2145736 )
テストベンチを実行するためには、擬似乱数生成パッケージ( https://gist.github.com/2056693 )で 公開している mt19937ar.vhd が必要です。
| GHDL=ghdl | |
| GHDLFLAGS =--mb-comments | |
| GHDLRUNFLAGS=--mb-comments | |
| WORK=work | |
| TEST_BENCH = test_bench_depth08_rd3_wd3_we0 \ | |
| test_bench_depth08_rd4_wd4_we0 \ | |
| test_bench_depth08_rd5_wd5_we0 \ | |
| test_bench_depth08_rd6_wd6_we3 \ | |
| test_bench_depth08_rd3_wd4_we0 \ | |
| test_bench_depth08_rd3_wd5_we0 \ | |
| test_bench_depth08_rd4_wd3_we0 \ | |
| test_bench_depth08_rd5_wd3_we0 \ | |
| $(END_LIST) | |
| all: $(TEST_BENCH) | |
| clean: | |
| rm -f *.o *.cf $(TEST_BENCH) | |
| test_bench_all: test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd3_wd3_we0 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd4_wd4_we0 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd5_wd5_we0 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd6_wd6_we3 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd3_wd4_we0 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd3_wd5_we0 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd4_wd3_we0 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench_depth08_rd5_wd3_we0 : test_bench.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench: test_bench.o sdpram_model.o | |
| $(GHDL) -e $(GHDLFLAGS) $@ | |
| -$(GHDL) -r $(GHDLRUNFLAGS) $@ | |
| test_bench.o: ./test_bench.vhd mt19937ar.o sdpram.o sdpram_model.o | |
| $(GHDL) -a $(GHDLFLAGS) --work=$(WORK) $< | |
| mt19937ar.o: ./mt19937ar.vhd | |
| $(GHDL) -a $(GHDLFLAGS) --work=$(WORK) $< | |
| sdpram.o: ./sdpram.vhd | |
| $(GHDL) -a $(GHDLFLAGS) --work=$(WORK) $< | |
| sdpram_model.o: ./sdpram_model.vhd | |
| $(GHDL) -a $(GHDLFLAGS) --work=$(WORK) $< |
| ----------------------------------------------------------------------------------- | |
| -- -- | |
| -- Title : Synchronous Dual Port RAM Entity. -- | |
| -- Version : 0.0.1 -- | |
| -- Created : 2012/3/18 -- | |
| -- File name : SDPRAM.vhd -- | |
| -- Module name : SDPRAM -- | |
| -- Author : Ichiro Kawazome <ichiro_k@ca2.so-net.ne.jp> -- | |
| -- Description : Synchronous Dual Port RAM Entity. -- | |
| -- -- | |
| -- Copyright (C) 2012 Ichiro Kawazome -- | |
| -- All rights reserved. -- | |
| -- -- | |
| -- Redistribution and use in source and binary forms, with or without -- | |
| -- modification, are permitted provided that the following conditions -- | |
| -- are met: -- | |
| -- -- | |
| -- 1. Redistributions of source code must retain the above copyright -- | |
| -- notice, this list of conditions and the following disclaimer. -- | |
| -- -- | |
| -- 2. Redistributions in binary form must reproduce the above copyright -- | |
| -- notice, this list of conditions and the following disclaimer in -- | |
| -- the documentation and/or other materials provided with the -- | |
| -- distribution. -- | |
| -- -- | |
| -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -- | |
| -- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -- | |
| -- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -- | |
| -- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -- | |
| -- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -- | |
| -- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -- | |
| -- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -- | |
| -- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -- | |
| -- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -- | |
| -- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -- | |
| -- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -- | |
| -- -- | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| entity SDPRAM is | |
| generic ( | |
| DEPTH : -- SDPRAM DEPTH : | |
| -- メモリの深さ(ビット単位)を2のべき乗値で指定する. | |
| -- 例 DEPTH=10 => 2**10=1024bit | |
| integer := 10; | |
| RWIDTH : -- SDPRAM READ DATA PORT WIDTH : | |
| -- リードポート(RDATA)の幅(ビット数)を2のべき乗値で指定する. | |
| -- 例 RWIDTH=5 => 2**5=32bit | |
| integer := 5; | |
| WWIDTH : -- SDPRAM WRITE DATA PORT WIDTH : | |
| -- ライトポート(WDATA)の幅(ビット数)を2のべき乗値で指定する. | |
| integer := 6; | |
| WEBIT : -- SDPRAM WRITE ENABLE WIDTH : | |
| -- ライトイネーブル信号(WE)の幅(ビット数)を2のべき乗値で指定する. | |
| -- 例 WEBIT=0 => 2**0=1bit | |
| -- WEBIT=2 => 2**2=4bit | |
| integer := 0; | |
| ID : -- SDPRAM IDENTIFIER : | |
| -- どのモジュールで使われているかを示す識別番号. | |
| integer := 0 | |
| ); | |
| port ( | |
| WCLK : in std_logic; | |
| WE : in std_logic_vector(2**WEBIT-1 downto 0); | |
| WADDR : in std_logic_vector(DEPTH-1 downto WWIDTH); | |
| RCLK : in std_logic; | |
| RADDR : in std_logic_vector(DEPTH-1 downto RWIDTH); | |
| WDATA : in std_logic_vector(2**WWIDTH-1 downto 0); | |
| RDATA : out std_logic_vector(2**RWIDTH-1 downto 0) | |
| ); | |
| end SDPRAM; |
| ----------------------------------------------------------------------------------- | |
| -- -- | |
| -- Title : Synchronous Dual Port RAM Model. -- | |
| -- Version : 0.0.1 -- | |
| -- Created : 2012/3/18 -- | |
| -- File name : SDPRAM.vhd -- | |
| -- Module name : SDPRAM -- | |
| -- Author : Ichiro Kawazome <ichiro_k@ca2.so-net.np.jp> -- | |
| -- Description : デュアルポートメモリのモデル。 -- | |
| -- 実際にASIC/FPGAに実装する時は、このモジュールを -- | |
| -- ベンダーに依存したものに置き換える。 -- | |
| -- -- | |
| -- Copyright (C) 2012 Ichiro Kawazome -- | |
| -- All rights reserved. -- | |
| -- -- | |
| -- Redistribution and use in source and binary forms, with or without -- | |
| -- modification, are permitted provided that the following conditions -- | |
| -- are met: -- | |
| -- -- | |
| -- 1. Redistributions of source code must retain the above copyright -- | |
| -- notice, this list of conditions and the following disclaimer. -- | |
| -- -- | |
| -- 2. Redistributions in binary form must reproduce the above copyright -- | |
| -- notice, this list of conditions and the following disclaimer in -- | |
| -- the documentation and/or other materials provided with the -- | |
| -- distribution. -- | |
| -- -- | |
| -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -- | |
| -- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -- | |
| -- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -- | |
| -- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -- | |
| -- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -- | |
| -- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -- | |
| -- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -- | |
| -- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -- | |
| -- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -- | |
| -- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -- | |
| -- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -- | |
| -- -- | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use ieee.numeric_std.all; | |
| architecture MODEL of SDPRAM is | |
| signal ram : std_logic_vector(2**DEPTH-1 downto 0); | |
| begin | |
| process (WCLK) | |
| variable w_ptr : integer; | |
| variable w_be : std_logic_vector(WDATA'range); | |
| constant W_BE_SIZE : integer := (2**WWIDTH)/(2**WEBIT); | |
| begin | |
| if (WCLK'event and WCLK = '1') then | |
| w_ptr := TO_INTEGER(unsigned(WADDR)) * (2**WWIDTH); | |
| for i in WE'range loop | |
| for n in 0 to W_BE_SIZE-1 loop | |
| w_be(i*W_BE_SIZE + n) := WE(i); | |
| end loop; | |
| end loop; | |
| for i in WDATA'range loop | |
| if (w_be(i) = '1') then | |
| ram(w_ptr+i) <= WDATA(i); | |
| end if; | |
| end loop; | |
| end if; | |
| end process; | |
| process (RCLK) | |
| variable r_ptr : integer; | |
| begin | |
| if (RCLK'event and RCLK = '1') then | |
| r_ptr := TO_INTEGER(unsigned(RADDR)) * (2**RWIDTH); | |
| for i in RDATA'range loop | |
| RDATA(i) <= ram(r_ptr+i); | |
| end loop; | |
| end if; | |
| end process; | |
| end MODEL; |
| ----------------------------------------------------------------------------------- | |
| -- -- | |
| -- Title : SDPRAM TEST BENCH -- | |
| -- Version : 0.0.1 -- | |
| -- Created : 2012/3/18 -- | |
| -- File name : test_bench.vhd -- | |
| -- Module name : TEST_BENCH -- | |
| -- Author : Ichiro Kawazome <ichiro_k@ca2.so-net.ne.jp> -- | |
| -- Description : SDPRAM のテストベンチ。 -- | |
| -- -- | |
| -- Copyright (C) 2012 Ichiro Kawazome -- | |
| -- All rights reserved. -- | |
| -- -- | |
| -- Redistribution and use in source and binary forms, with or without -- | |
| -- modification, are permitted provided that the following conditions -- | |
| -- are met: -- | |
| -- -- | |
| -- 1. Redistributions of source code must retain the above copyright -- | |
| -- notice, this list of conditions and the following disclaimer. -- | |
| -- -- | |
| -- 2. Redistributions in binary form must reproduce the above copyright -- | |
| -- notice, this list of conditions and the following disclaimer in -- | |
| -- the documentation and/or other materials provided with the -- | |
| -- distribution. -- | |
| -- -- | |
| -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -- | |
| -- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -- | |
| -- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -- | |
| -- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -- | |
| -- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -- | |
| -- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -- | |
| -- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -- | |
| -- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -- | |
| -- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -- | |
| -- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -- | |
| -- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -- | |
| -- -- | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use ieee.numeric_std.all; | |
| use std.textio.all; | |
| use work.MT19937AR.SEED_TYPE; | |
| use work.MT19937AR.TO_SEED_TYPE; | |
| use work.MT19937AR.PSEUDO_RANDOM_NUMBER_GENERATOR_TYPE; | |
| use work.MT19937AR.NEW_PSEUDO_RANDOM_NUMBER_GENERATOR; | |
| use work.MT19937AR.GENERATE_RANDOM_REAL1; | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| entity TEST_BENCH is | |
| generic ( | |
| DEPTH : integer := 9; | |
| RWIDTH : integer := 5; | |
| WWIDTH : integer := 6; | |
| WEBIT : integer := 0; | |
| AUTO_FINISH : integer := 1 | |
| ); | |
| port ( | |
| FINISH : out std_logic | |
| ); | |
| end TEST_BENCH; | |
| architecture MODEL of TEST_BENCH is | |
| procedure INT_TO_STRING(constant VAL : in integer; | |
| constant LEN : in integer; | |
| variable STR : out STRING ) | |
| is | |
| variable buf : string(STR'length downto 1); | |
| variable pos : integer; | |
| variable tmp : integer; | |
| variable digit : integer range 0 to 9; | |
| begin | |
| pos := 1; | |
| tmp := abs(VAL); | |
| for i in 1 to LEN loop | |
| digit := abs(tmp mod 10); | |
| case digit is | |
| when 0 => buf(pos) := '0'; | |
| when 1 => buf(pos) := '1'; | |
| when 2 => buf(pos) := '2'; | |
| when 3 => buf(pos) := '3'; | |
| when 4 => buf(pos) := '4'; | |
| when 5 => buf(pos) := '5'; | |
| when 6 => buf(pos) := '6'; | |
| when 7 => buf(pos) := '7'; | |
| when 8 => buf(pos) := '8'; | |
| when 9 => buf(pos) := '9'; | |
| end case; | |
| pos := pos + 1; | |
| tmp := tmp / 10; | |
| end loop; | |
| if (VAL < 0) then | |
| buf(pos) := '-'; | |
| else | |
| pos := pos - 1; | |
| end if; | |
| STR(1 to pos) := buf(pos downto 1); | |
| end INT_TO_STRING; -- procedure | |
| function INT_TO_STRING(VAL:integer;LEN:integer) return STRING is | |
| variable str : string(1 to 32); | |
| begin | |
| INT_TO_STRING(VAL, LEN, str); | |
| return str(1 to LEN); | |
| end INT_TO_STRING; | |
| function MAKE_INSTANCE_NAME return STRING is | |
| variable str : string(1 to 19); | |
| begin | |
| str := "DEPTH" & INT_TO_STRING(DEPTH ,2) & | |
| "_RD" & INT_TO_STRING(RWIDTH,1) & | |
| "_WD" & INT_TO_STRING(WWIDTH,1) & | |
| "_WE" & INT_TO_STRING(WEBIT ,1); | |
| return str; | |
| end MAKE_INSTANCE_NAME; | |
| constant INSTANCE_NAME : string(1 to 19) := MAKE_INSTANCE_NAME; | |
| constant PERIOD : time := 10 ns; | |
| constant DELAY : time := 1 ns; | |
| constant HEX : STRING(1 to 16) := "0123456789ABCDEF"; | |
| signal SCENARIO : STRING(1 to 5); | |
| signal CLK : std_logic; | |
| signal RST : std_logic; | |
| signal WE : std_logic_vector(2**WEBIT-1 downto 0); | |
| signal WADDR : std_logic_vector(DEPTH-1 downto WWIDTH); | |
| signal RADDR : std_logic_vector(DEPTH-1 downto RWIDTH); | |
| signal WDATA : std_logic_vector(2**WWIDTH-1 downto 0); | |
| signal RDATA : std_logic_vector(2**RWIDTH-1 downto 0); | |
| signal EXP_Q : bit_vector(2**RWIDTH-1 downto 0); | |
| signal EXP_F : bit_vector(2**RWIDTH-1 downto 0); | |
| component SDPRAM | |
| generic ( | |
| DEPTH : integer := 6; | |
| RWIDTH : integer := 6; | |
| WWIDTH : integer := 6; | |
| WEBIT : integer := 0; | |
| ID : integer := 0 | |
| ); | |
| port ( | |
| WCLK : in std_logic; | |
| WE : in std_logic_vector(2**WEBIT-1 downto 0); | |
| WADDR : in std_logic_vector(DEPTH-1 downto WWIDTH); | |
| RCLK : in std_logic; | |
| RADDR : in std_logic_vector(DEPTH-1 downto RWIDTH); | |
| WDATA : in std_logic_vector(2**WWIDTH-1 downto 0); | |
| RDATA : out std_logic_vector(2**RWIDTH-1 downto 0) | |
| ); | |
| end component; | |
| begin | |
| ------------------------------------------------------------------------------- | |
| -- | |
| ------------------------------------------------------------------------------- | |
| U: SDPRAM | |
| generic map ( | |
| DEPTH => DEPTH, | |
| RWIDTH => RWIDTH, | |
| WWIDTH => WWIDTH, | |
| WEBIT => WEBIT, | |
| ID => 0 | |
| ) | |
| port map( | |
| WCLK => CLK, | |
| WE => WE, | |
| WADDR => WADDR(DEPTH-1 downto WWIDTH), | |
| RCLK => CLK, | |
| RADDR => RADDR(DEPTH-1 downto RWIDTH), | |
| WDATA => WDATA, | |
| RDATA => RDATA | |
| ); | |
| ------------------------------------------------------------------------------- | |
| -- | |
| ------------------------------------------------------------------------------- | |
| process begin | |
| CLK <= '1'; wait for PERIOD/2; | |
| CLK <= '0'; wait for PERIOD/2; | |
| end process; | |
| ------------------------------------------------------------------------------- | |
| -- 入力側のモデル | |
| ------------------------------------------------------------------------------- | |
| process | |
| procedure WAIT_CLK(CNT:integer) is | |
| begin | |
| if (CNT > 0) then | |
| for i in 1 to CNT loop | |
| wait until (CLK'event and CLK = '1'); | |
| end loop; | |
| wait for DELAY; | |
| end if; | |
| end WAIT_CLK; | |
| --------------------------------------------------------------------------- | |
| -- 乱数生成用変数およびプロシージャ | |
| --------------------------------------------------------------------------- | |
| variable prng : PSEUDO_RANDOM_NUMBER_GENERATOR_TYPE | |
| := NEW_PSEUDO_RANDOM_NUMBER_GENERATOR(1623); | |
| variable count : integer := 0; | |
| variable text_line : LINE; | |
| constant SPACE : STRING(1 to 1) := " "; | |
| procedure GENERATE_UNIFORM_RANDOM( | |
| variable value : out integer; | |
| startpoint : in integer; | |
| endpoint : in integer | |
| ) is | |
| variable random_number : real; | |
| variable random_value : integer; | |
| begin | |
| GENERATE_RANDOM_REAL1(prng,random_number); | |
| --WRITE(text_line, count); | |
| --WRITE(text_line, SPACE); | |
| --WRITE(text_line, startpoint); | |
| --WRITE(text_line, SPACE); | |
| --WRITE(text_line, endpoint); | |
| --WRITE(text_line, SPACE); | |
| random_value := startpoint + integer(random_number*real(endpoint-startpoint)); | |
| value := random_value; | |
| count := count + 1; | |
| --WRITE(text_line, random_value); | |
| --WRITELINE(OUTPUT, text_line); | |
| end procedure; | |
| --------------------------------------------------------------------------- | |
| -- データパターンテーブル/データ書き込みフラグ | |
| --------------------------------------------------------------------------- | |
| variable table : bit_vector(2**DEPTH-1 downto 0); | |
| variable w_ok : bit_vector(2**DEPTH-1 downto 0); | |
| --------------------------------------------------------------------------- | |
| -- 中間変数 | |
| --------------------------------------------------------------------------- | |
| variable ptr : integer; | |
| variable len : integer; | |
| --------------------------------------------------------------------------- | |
| -- データパターンテーブル//データ書き込みフラグの初期化を行なうサブルーチン | |
| --------------------------------------------------------------------------- | |
| procedure INIT_TABLE is | |
| variable pattern : integer; | |
| begin | |
| for i in table'range loop | |
| GENERATE_UNIFORM_RANDOM(pattern,0,2); | |
| if (pattern >= 1) then table(i) := '1'; | |
| else table(i) := '0'; | |
| end if; | |
| end loop; | |
| w_ok := (others => '0'); | |
| WAIT_CLK(1); | |
| end INIT_TABLE; | |
| --------------------------------------------------------------------------- | |
| -- RAMにデータを書き込むプロシージャ(WENがbit_vectorの場合) | |
| --------------------------------------------------------------------------- | |
| procedure WRITE(PTR:integer;WEN:bit_vector) is | |
| variable w_ptr : integer; | |
| variable w_be : bit_vector(2**WWIDTH-1 downto 0); | |
| constant W_BE_SIZE : integer := (2**WWIDTH)/(2**WEBIT); | |
| begin | |
| w_ptr := PTR * (2**WWIDTH); | |
| for i in WEN'range loop | |
| for n in 0 to W_BE_SIZE-1 loop | |
| w_be(i*W_BE_SIZE + n) := WEN(i); | |
| end loop; | |
| end loop; | |
| for i in 0 to 2**WWIDTH-1 loop | |
| if (w_be(i) = '1') then | |
| if (table(w_ptr+i) = '1') then | |
| WDATA(i) <= '1'; | |
| else | |
| WDATA(i) <= '0'; | |
| end if; | |
| w_ok(w_ptr+i) := '1'; | |
| else | |
| WDATA(i) <= '0'; | |
| end if; | |
| end loop; | |
| WADDR <= std_logic_vector(TO_UNSIGNED(PTR,WADDR'length)); | |
| for i in WEN'range loop | |
| if (WEN(i) = '1') then WE(i) <= '1'; | |
| else WE(i) <= '0'; | |
| end if; | |
| end loop; | |
| WAIT_CLK(1); | |
| WE <= (others => '0'); | |
| end WRITE; | |
| --------------------------------------------------------------------------- | |
| -- RAMにデータを書き込むプロシージャ | |
| --------------------------------------------------------------------------- | |
| procedure WRITE(PTR:integer;LEN:integer) is | |
| variable word_ena : bit_vector(2**WEBIT-1 downto 0); | |
| variable word_ptr : integer; | |
| variable word_pos : integer; | |
| variable last_ptr : integer; | |
| variable last_pos : integer; | |
| begin | |
| word_ptr := (PTR ) / (2**WWIDTH); | |
| word_pos := (PTR ) mod (2**WWIDTH); | |
| last_ptr := (PTR+LEN-1) / (2**WWIDTH); | |
| while (word_ptr <= last_ptr) loop | |
| if (word_ptr = last_ptr) then | |
| last_pos := (PTR+LEN-1) mod (2**WWIDTH); | |
| else | |
| last_pos := (2**WWIDTH)-1; | |
| end if; | |
| for i in word_ena'range loop | |
| if (i >= word_pos/(2**(WWIDTH-WEBIT))) and | |
| (i <= last_pos/(2**(WWIDTH-WEBIT))) then | |
| word_ena(i) := '1'; | |
| else | |
| word_ena(i) := '0'; | |
| end if; | |
| end loop; | |
| WRITE(word_ptr,word_ena); | |
| word_ptr := word_ptr + 1; | |
| word_pos := 0; | |
| exit when (word_ptr*(2**WWIDTH) > (2**(DEPTH-WWIDTH))); | |
| end loop; | |
| end WRITE; | |
| --------------------------------------------------------------------------- | |
| -- RAMの内容とデータパターンの照合を行なうプロシージャ | |
| --------------------------------------------------------------------------- | |
| procedure VERIFY is | |
| variable d : bit_vector(2**RWIDTH-1 downto 0); | |
| variable w : bit_vector(2**RWIDTH-1 downto 0); | |
| begin | |
| wait until (CLK'event and CLK = '1'); | |
| wait for DELAY; | |
| RADDR <= std_logic_vector(TO_UNSIGNED(0,RADDR'length)); | |
| wait until (CLK'event and CLK = '1'); | |
| for r_ptr in 0 to 2**(DEPTH-RWIDTH)-1 loop | |
| wait for DELAY; | |
| if (r_ptr < 2**(DEPTH-RWIDTH)-1) then | |
| RADDR <= std_logic_vector(TO_UNSIGNED(r_ptr+1,RADDR'length)); | |
| end if; | |
| for i in 0 to 2**RWIDTH-1 loop | |
| d(i) := table(r_ptr*(2**RWIDTH)+i); | |
| w(i) := w_ok (r_ptr*(2**RWIDTH)+i); | |
| end loop; | |
| EXP_Q <= d; | |
| EXP_F <= w; | |
| wait until (CLK'event and CLK = '1'); | |
| for i in 0 to 2**RWIDTH-1 loop | |
| if (w(i) = '1') and | |
| ((d(i) = '1' and RDATA(i) /= '1') or | |
| (d(i) = '0' and RDATA(i) /= '0')) then | |
| assert (false) report "Mismatch..." severity FAILURE; | |
| end if; | |
| end loop; | |
| end loop; | |
| wait for DELAY; | |
| end VERIFY; | |
| begin | |
| --------------------------------------------------------------------------- | |
| -- シミュレーションの開始、まずはリセットから。 | |
| --------------------------------------------------------------------------- | |
| assert(false) report "Starting Run..." severity NOTE; | |
| SCENARIO <= "START"; | |
| RST <= '1'; | |
| WADDR <= (others => '0'); | |
| WE <= (others => '0'); | |
| WDATA <= (others => '0'); | |
| RADDR <= (others => '0'); | |
| WAIT_CLK( 4); RST <= '0'; | |
| WAIT_CLK( 4); | |
| --------------------------------------------------------------------------- | |
| -- | |
| --------------------------------------------------------------------------- | |
| SCENARIO <= "1.0.0"; | |
| for i in 0 to WEBIT loop | |
| SCENARIO(5) <= HEX(i+1); | |
| INIT_TABLE; | |
| for ptr in 0 to 2**(DEPTH-(WWIDTH-i))-1 loop | |
| WRITE(ptr*(2**(WWIDTH-i)), 2**(WWIDTH-i)); | |
| end loop; | |
| VERIFY; | |
| end loop; | |
| --------------------------------------------------------------------------- | |
| -- | |
| --------------------------------------------------------------------------- | |
| SCENARIO <= "2.0.0"; | |
| for i in 0 to 9 loop | |
| SCENARIO(5) <= HEX(i+1); | |
| INIT_TABLE; | |
| -- RA <= CONV_STD_LOGIC_VECTOR(1, RA'length); | |
| for n in 0 to 99 loop | |
| GENERATE_UNIFORM_RANDOM(ptr, 0, 2**(DEPTH-(WWIDTH-WEBIT))-1); | |
| GENERATE_UNIFORM_RANDOM(len, 1, 2**(WWIDTH-WEBIT)); | |
| WRITE(ptr*(2**(WWIDTH-WEBIT)), len*(2**(WWIDTH-WEBIT))); | |
| end loop; | |
| VERIFY; | |
| end loop; | |
| --------------------------------------------------------------------------- | |
| -- シミュレーション終了 | |
| --------------------------------------------------------------------------- | |
| WAIT_CLK(10); | |
| if (AUTO_FINISH = 0) then | |
| assert(false) report INSTANCE_NAME & " Run complete..." severity NOTE; | |
| FINISH <= 'Z'; | |
| else | |
| FINISH <= 'Z'; | |
| assert(false) report INSTANCE_NAME & " Run complete..." severity FAILURE; | |
| end if; | |
| wait; | |
| end process; | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチのコンポーネント宣言 | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| package COMPONENTS is | |
| component TEST_BENCH is | |
| generic ( | |
| DEPTH : integer := 9; | |
| RWIDTH : integer := 5; | |
| WWIDTH : integer := 6; | |
| WEBIT : integer := 0; | |
| AUTO_FINISH : integer := 0 | |
| ); | |
| port ( | |
| FINISH : out std_logic | |
| ); | |
| end component; | |
| end COMPONENTS; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD3_WD3_WE0 is | |
| end TEST_BENCH_DEPTH08_RD3_WD3_WE0; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD3_WD3_WE0 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>3,WWIDTH=>3,WEBIT=>0,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD4_WD4_WE0 is | |
| end TEST_BENCH_DEPTH08_RD4_WD4_WE0; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD4_WD4_WE0 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>4,WWIDTH=>4,WEBIT=>0,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD5_WD5_WE0 is | |
| end TEST_BENCH_DEPTH08_RD5_WD5_WE0; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD5_WD5_WE0 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>5,WWIDTH=>5,WEBIT=>0,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD6_WD6_WE3 is | |
| end TEST_BENCH_DEPTH08_RD6_WD6_WE3; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD6_WD6_WE3 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>6,WWIDTH=>6,WEBIT=>3,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD3_WD4_WE0 is | |
| end TEST_BENCH_DEPTH08_RD3_WD4_WE0; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD3_WD4_WE0 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>3,WWIDTH=>4,WEBIT=>0,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD3_WD5_WE0 is | |
| end TEST_BENCH_DEPTH08_RD3_WD5_WE0; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD3_WD5_WE0 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>3,WWIDTH=>5,WEBIT=>0,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD4_WD3_WE0 is | |
| end TEST_BENCH_DEPTH08_RD4_WD3_WE0; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD4_WD3_WE0 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>4,WWIDTH=>3,WEBIT=>0,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_DEPTH08_RD5_WD3_WE0 is | |
| end TEST_BENCH_DEPTH08_RD5_WD3_WE0; | |
| architecture MODEL of TEST_BENCH_DEPTH08_RD5_WD3_WE0 is | |
| signal FINISH : std_logic; | |
| begin | |
| TB:TEST_BENCH generic map (DEPTH=>8,RWIDTH =>5,WWIDTH=>3,WEBIT=>0,AUTO_FINISH => 1)port map (open); | |
| end MODEL; | |
| ----------------------------------------------------------------------------------- | |
| -- テストベンチ | |
| ----------------------------------------------------------------------------------- | |
| library ieee; | |
| use ieee.std_logic_1164.all; | |
| use WORK.COMPONENTS.TEST_BENCH; | |
| entity TEST_BENCH_ALL is | |
| end TEST_BENCH_ALL; | |
| architecture MODEL of TEST_BENCH_ALL is | |
| signal FINISH : std_logic; | |
| begin | |
| DEPTH_GEN : for DEPTH in 8 to 12 generate | |
| RWIDTH_GEN: for RWIDTH in 3 to 6 generate | |
| WWIDTH_GEN: for WWIDTH in 3 to 6 generate | |
| WEBIT_GEN : for WEBIT in 0 to 1 generate | |
| TB:TEST_BENCH generic map ( | |
| DEPTH => DEPTH, | |
| RWIDTH => RWIDTH, | |
| WWIDTH => WWIDTH, | |
| WEBIT => WEBIT, | |
| AUTO_FINISH => 0 | |
| ) | |
| port map ( | |
| FINISH => FINISH | |
| ); | |
| end generate; | |
| end generate; | |
| end generate; | |
| end generate; | |
| FINISH <= 'H' after 1 ns; | |
| process (FINISH) begin | |
| if (FINISH'event and FINISH = 'H') then | |
| assert(false) report "Run complete all." severity FAILURE; | |
| end if; | |
| end process; | |
| end MODEL; |