From ca1dff9a0fd80f449e741fda6d69e4949c49e1af Mon Sep 17 00:00:00 2001
From: Reinier van der Walle <walle@astron.nl>
Date: Thu, 8 Oct 2020 18:05:33 +0200
Subject: [PATCH] Initial commit of tb_mms_dp_scale.vhd
---
libraries/base/dp/hdllib.cfg | 2 +
libraries/base/dp/tb/vhdl/tb_mms_dp_scale.vhd | 189 ++++++++++++++++++
2 files changed, 191 insertions(+)
create mode 100644 libraries/base/dp/tb/vhdl/tb_mms_dp_scale.vhd
diff --git a/libraries/base/dp/hdllib.cfg b/libraries/base/dp/hdllib.cfg
index d238389b5a..93a162a26a 100644
--- a/libraries/base/dp/hdllib.cfg
+++ b/libraries/base/dp/hdllib.cfg
@@ -297,6 +297,7 @@ test_bench_files =
tb/vhdl/tb_dp_offload_tx_v3.vhd
tb/vhdl/tb_dp_offload_rx_filter.vhd
tb/vhdl/tb_dp_selector_arr.vhd
+ tb/vhdl/tb_mms_dp_scale.vhd
regression_test_vhdl =
tb/vhdl/tb_dp_fifo_to_mm.vhd
@@ -351,6 +352,7 @@ regression_test_vhdl =
tb/vhdl/tb_tb_dp_throttle_xon.vhd
tb/vhdl/tb_tb_dp_xonoff.vhd
tb/vhdl/tb_dp_selector_arr.vhd
+ tb/vhdl/tb_mms_dp_scale.vhd
[modelsim_project_file]
diff --git a/libraries/base/dp/tb/vhdl/tb_mms_dp_scale.vhd b/libraries/base/dp/tb/vhdl/tb_mms_dp_scale.vhd
new file mode 100644
index 0000000000..02533cd3dc
--- /dev/null
+++ b/libraries/base/dp/tb/vhdl/tb_mms_dp_scale.vhd
@@ -0,0 +1,189 @@
+-------------------------------------------------------------------------------
+--
+-- Copyright 2020
+-- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
+-- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+-- http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+-------------------------------------------------------------------------------
+
+-- Author: R. van der Walle
+-- Purpose: Verify mms_dp_scale
+-- Description:
+-- Usage:
+-- > as 10
+-- > run -all
+-- The tb is self stopping and self checking.
+
+
+LIBRARY IEEE, common_lib, technology_lib;
+USE IEEE.std_logic_1164.ALL;
+USE IEEE.numeric_std.ALL;
+USE common_lib.common_pkg.ALL;
+USE common_lib.common_lfsr_sequences_pkg.ALL;
+USE common_lib.tb_common_pkg.ALL;
+USE common_lib.common_mem_pkg.ALL;
+USE common_lib.tb_common_mem_pkg.ALL;
+USE work.dp_stream_pkg.ALL;
+USE work.tb_dp_pkg.ALL;
+USE technology_lib.technology_select_pkg.ALL;
+
+
+ENTITY tb_mms_dp_scale IS
+END tb_mms_dp_scale;
+
+
+ARCHITECTURE tb OF tb_mms_dp_scale IS
+
+ CONSTANT c_mm_clk_period : TIME := 20 ns;
+ CONSTANT c_dp_clk_period : TIME := 10 ns;
+ CONSTANT c_cross_clock_domain_latency : NATURAL := 20;
+
+ CONSTANT c_complex_data : BOOLEAN := TRUE;
+ CONSTANT c_complex_gain : BOOLEAN := FALSE;
+ CONSTANT c_gain_w : NATURAL := 8;
+ CONSTANT c_in_dat_w : NATURAL := 9;
+ CONSTANT c_in_length : INTEGER := 2**(c_in_dat_w-3)-1; -- Expected sosi does not take clipping into account
+ CONSTANT c_in_max : INTEGER := 2**(c_in_dat_w-3)-1;
+ CONSTANT c_in_min : INTEGER := -2**(c_in_dat_w-3);
+ CONSTANT c_out_dat_w : NATURAL := c_in_dat_w; -- skip double sign bit and assume complex gain amplitude <= 1
+ cONSTANT c_lsb_w : NATURAL := 1;
+
+ CONSTANT c_gain_re : INTEGER := 2**2;
+ CONSTANT c_exp_gain_re : INTEGER := 2**(2-c_lsb_w);
+
+ SIGNAL tb_end : STD_LOGIC := '0';
+ SIGNAL mm_clk : STD_LOGIC := '1';
+ SIGNAL mm_rst : STD_LOGIC := '1';
+ SIGNAL dp_clk : STD_LOGIC := '1';
+ SIGNAL dp_rst : STD_LOGIC := '1';
+
+ SIGNAL stimuli_en : STD_LOGIC := '0';
+ SIGNAL verify_en : STD_LOGIC := '0';
+
+ SIGNAL cnt_re : STD_LOGIC_VECTOR(c_in_dat_w-1 DOWNTO 0) := (OTHERS=>'0');
+ SIGNAL cnt_im : STD_LOGIC_VECTOR(c_in_dat_w-1 DOWNTO 0) := (OTHERS=>'0');
+ SIGNAL cnt_val : STD_LOGIC;
+
+ SIGNAL in_sosi : t_dp_sosi;
+ SIGNAL in_sosi_dly : t_dp_sosi;
+ SIGNAL exp_sosi : t_dp_sosi;
+ SIGNAL out_sosi : t_dp_sosi;
+
+ SIGNAL reg_gain_re_mosi : t_mem_mosi := c_mem_mosi_rst;
+ SIGNAL reg_gain_re_miso : t_mem_miso;
+ SIGNAL reg_gain_im_mosi : t_mem_mosi := c_mem_mosi_rst;
+ SIGNAL reg_gain_im_miso : t_mem_miso;
+
+BEGIN
+
+ dp_clk <= (NOT dp_clk) OR tb_end AFTER c_dp_clk_period/2;
+ mm_clk <= (NOT mm_clk) OR tb_end AFTER c_mm_clk_period/2;
+ dp_rst <= '1', '0' AFTER c_dp_clk_period*7;
+ mm_rst <= '1', '0' AFTER c_mm_clk_period*7;
+
+ ------------------------------------------------------------------------------
+ -- DATA GENERATION
+ ------------------------------------------------------------------------------
+ proc_dp_cnt_dat(dp_rst, dp_clk, stimuli_en, cnt_val, cnt_re);
+
+ -- derive cnt_im linearly from cnt_re such that abs(complex(cnt_re, cnt_im)) <= amplitude
+ -- the principle is: suppose re normalized to 1 then im = 1-re when re>=0 else im = -1-re when re<0
+ cnt_im <= TO_SVEC(sel_a_b(TO_SINT(cnt_re)>=0, c_in_max, c_in_min) - TO_SINT(cnt_re), c_in_dat_w);
+
+ in_sosi.data <= RESIZE_DP_SDATA(cnt_re);
+ in_sosi.re <= RESIZE_DP_DSP_DATA(cnt_re);
+ in_sosi.im <= RESIZE_DP_DSP_DATA(cnt_im);
+ in_sosi.valid <= cnt_val;
+
+ u_in_sosi_dly : ENTITY work.dp_pipeline
+ GENERIC MAP (
+ g_pipeline => 3 -- latency of DUT
+ )
+ PORT MAP (
+ rst => dp_rst,
+ clk => dp_clk,
+ snk_in => in_sosi,
+ src_out => in_sosi_dly
+ );
+
+ p_mm_stimuli : PROCESS
+ BEGIN
+ proc_common_wait_until_low(dp_clk, dp_rst);
+ proc_common_wait_some_cycles(dp_clk, 5);
+
+ proc_mem_mm_bus_wr(0, c_gain_re, mm_clk, reg_gain_re_miso, reg_gain_re_mosi);
+
+ proc_common_wait_some_cycles(mm_clk, c_cross_clock_domain_latency);
+ proc_common_wait_some_cycles(dp_clk, c_cross_clock_domain_latency);
+
+ stimuli_en <= '1';
+ proc_common_wait_some_cycles(dp_clk, 4);
+
+ verify_en <= '1';
+ proc_common_wait_some_cycles(dp_clk, c_in_length);
+ verify_en <= '0';
+
+ tb_end <= '1';
+ WAIT;
+ END PROCESS;
+
+ -- Verify out_sosi_arr
+ p_exp_sosi : PROCESS(in_sosi_dly)
+ BEGIN
+ exp_sosi.re <= TO_DP_DSP_DATA(c_exp_gain_re * TO_SINT(in_sosi_dly.re));
+ exp_sosi.im <= TO_DP_DSP_DATA(c_exp_gain_re * TO_SINT(in_sosi_dly.im));
+ END PROCESS;
+
+ p_verify : PROCESS(dp_clk)
+ BEGIN
+ IF rising_edge(dp_clk) THEN
+ IF verify_en='1' THEN
+ ASSERT SIGNED(out_sosi.re)=SIGNED(exp_sosi.re) REPORT "Unexpected complex real data, with real gain" SEVERITY ERROR;
+ ASSERT SIGNED(out_sosi.im)=SIGNED(exp_sosi.im) REPORT "Unexpected complex imag data, with real gain" SEVERITY ERROR;
+ END IF;
+ END IF;
+ END PROCESS;
+
+ ------------------------------------------------------------------------------
+ -- DUT
+ ------------------------------------------------------------------------------
+ u_dut : ENTITY work.mms_dp_scale
+ GENERIC MAP (
+ g_complex_data => c_complex_data,
+ g_complex_gain => c_complex_gain,
+ g_gain_w => c_gain_w,
+ g_in_dat_w => c_in_dat_w,
+ g_out_dat_w => c_out_dat_w,
+ g_lsb_w => c_lsb_w
+ )
+ PORT MAP (
+ -- Clocks and reset
+ mm_rst => mm_rst,
+ mm_clk => mm_clk,
+ dp_rst => dp_rst,
+ dp_clk => dp_clk,
+
+ -- MM access to gain
+ reg_gain_re_mosi => reg_gain_re_mosi,
+ reg_gain_re_miso => reg_gain_re_miso,
+ reg_gain_im_mosi => reg_gain_im_mosi,
+ reg_gain_im_miso => reg_gain_im_miso,
+
+ -- ST
+ in_sosi => in_sosi,
+ out_sosi => out_sosi
+ );
+
+END tb;
--
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