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`timescale 1 ns/ 1 ns
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module FIR_cascaded_tb
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#(
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// uncomment selected test
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`define test_saw // test with I -4, -3, ..., 4, 5 ; and Q 1, 2, ..., 9, 10, 10 complex samples of ping total
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//`define test_tone // tone pulse
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//`define test_rect // rectangle pulse
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//`define test_delta // test with delta-function
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//`define test_chirp // test with chirp. It is long test, pulse response length is 2048
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//`define test_chirp_short
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`ifdef test_saw
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//Test short signal
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parameter PING_FROM_INPUT_SIGNAL = 1,
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parameter INP_SAMP_WIDTH = 14, // imput samples width
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parameter PING_ADDR_WIDTH = 4, // address width of pulse response characteristic samples
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parameter CONV_MEM_BLOCK_ADDR_WIDTH = 3, //address width of block
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parameter FRAME_ADDR_WIDTH = 14, // address width of counter of samples in frame
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parameter OUT_SAMP_WIDTH = 18, // output samples width
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parameter CLK_TO_SAMP_ADDR_WIDTH = 12, // inp_samp counter width, it counts clk
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parameter CLK_TO_SAMP_RATIO = 25, // clk -> inp_clk divider
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parameter SIM_FRAME_ADDR_COUNTER_WIDTH = 18, // address in frame counter
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parameter SIM_FRAME_COUNTER_WIDTH = 18, // number of frame counter
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parameter PARAM_INP_PING_LENGTH = 10, // ping length
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parameter FRAME_PERIOD = 100, // frame period
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parameter OUT_SAMP_A_SQ_WIDTH = 16, // |output|^2 word width
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parameter OUT_SAMP_A_SQ_OFFS = 4, // offset of |output|^2 word, OUT_SAMP_A_SQ_WIDTH bits from OUT_SAMP_A_SQ_OFFS writes to output
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parameter INP_FILE = "IQ_saw_signal.txt", // input signal samples file
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parameter PING_FILE = "IQ_saw_ping.txt", // ping samples file
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parameter SIM_DURATION = 100000 // simulation duration after reset duration
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// input file example with -4,-3... in I and 1, 2, 3 in Q:
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// fffc
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// 0001
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// fffd
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// 0002
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// fffe
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// 0003
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`endif
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`ifdef test_tone
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parameter PING_FROM_INPUT_SIGNAL = 1,
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parameter INP_SAMP_WIDTH = 14, // imput samples width
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parameter PING_ADDR_WIDTH = 7, // address width of pulse response characteristic samples
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parameter CONV_MEM_BLOCK_ADDR_WIDTH = 3, //address width of block
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parameter FRAME_ADDR_WIDTH = 14, // address width of counter of samples in frame
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parameter OUT_SAMP_WIDTH = 18, // output samples width
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parameter CLK_TO_SAMP_ADDR_WIDTH = 12, // inp_samp counter width, it counts clk
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parameter CLK_TO_SAMP_RATIO = 100, // clk -> inp_clk divider
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parameter SIM_FRAME_ADDR_COUNTER_WIDTH = 18, // address in frame counter
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parameter SIM_FRAME_COUNTER_WIDTH = 18, // number of frame counter
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parameter PARAM_INP_PING_LENGTH = 100, // ping length
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parameter FRAME_PERIOD = 2500, // frame period
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parameter OUT_SAMP_A_SQ_WIDTH = 16, // |output|^2 word width
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parameter OUT_SAMP_A_SQ_OFFS = 16, // offset of |output|^2 word, OUT_SAMP_A_SQ_WIDTH bits from OUT_SAMP_A_SQ_OFFS writes to output
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parameter INP_FILE = "IQ_tone_signal.txt", // input signal samples file
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parameter PING_FILE = "IQ_tone_ping.txt", // ping samples file
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parameter SIM_DURATION = 5000000 // simulation duration after reset duration
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`endif
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`ifdef test_rect
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//Test short signal
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parameter PING_FROM_INPUT_SIGNAL = 1,
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parameter INP_SAMP_WIDTH = 14, // imput samples width
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parameter PING_ADDR_WIDTH = 7, // address width of pulse response characteristic samples
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parameter CONV_MEM_BLOCK_ADDR_WIDTH = 3, //address width of block
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parameter FRAME_ADDR_WIDTH = 14, // address width of counter of samples in frame
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parameter OUT_SAMP_WIDTH = 18, // output samples width
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parameter CLK_TO_SAMP_ADDR_WIDTH = 12, // inp_samp counter width, it counts clk
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parameter CLK_TO_SAMP_RATIO = 100, // clk -> inp_clk divider
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parameter SIM_FRAME_ADDR_COUNTER_WIDTH = 18, // address in frame counter
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parameter SIM_FRAME_COUNTER_WIDTH = 18, // number of frame counter
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parameter PARAM_INP_PING_LENGTH = 100, // ping length
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parameter FRAME_PERIOD = 2500, // frame period
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parameter OUT_SAMP_A_SQ_WIDTH = 16, // |output|^2 word width
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parameter OUT_SAMP_A_SQ_OFFS = 4, // offset of |output|^2 word, OUT_SAMP_A_SQ_WIDTH bits from OUT_SAMP_A_SQ_OFFS writes to output
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parameter INP_FILE = "IQ_rect_signal.txt", // input signal samples file
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parameter PING_FILE = "IQ_rect_ping.txt", // ping samples file
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parameter SIM_DURATION = 4000000 // simulation duration after reset duration
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`endif
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`ifdef test_delta
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//Test delta function
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parameter PING_FROM_INPUT_SIGNAL = 1,
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parameter INP_SAMP_WIDTH = 14,
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parameter PING_ADDR_WIDTH = 4,
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parameter FRAME_ADDR_WIDTH = 14,
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parameter CONV_MEM_BLOCK_ADDR_WIDTH = 3,
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parameter OUT_SAMP_WIDTH = 18,
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parameter CLK_TO_SAMP_ADDR_WIDTH = 12,
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parameter CLK_TO_SAMP_RATIO = 25,
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parameter SIM_FRAME_ADDR_COUNTER_WIDTH = 18,
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parameter SIM_FRAME_COUNTER_WIDTH = 18,
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parameter PARAM_INP_PING_LENGTH = 1,
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parameter FRAME_PERIOD = 50,
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parameter OUT_SAMP_A_SQ_WIDTH = 16,
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parameter OUT_SAMP_A_SQ_OFFS = 4,
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parameter INP_FILE = "IQ_delta_signal.txt",
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parameter PING_FILE = "IQ_delta_ping.txt",
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parameter SIM_DURATION = 1000000 // simulation duration after reset duration
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`endif
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`ifdef test_chirp_short
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parameter PING_FROM_INPUT_SIGNAL = 1,
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parameter INP_SAMP_WIDTH = 14,
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parameter PING_ADDR_WIDTH = 6,
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parameter FRAME_ADDR_WIDTH = 18,
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parameter CONV_MEM_BLOCK_ADDR_WIDTH = 5,
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parameter OUT_SAMP_WIDTH = 18,
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parameter CLK_TO_SAMP_ADDR_WIDTH = 11,
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parameter CLK_TO_SAMP_RATIO = 500,
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parameter SIM_FRAME_ADDR_COUNTER_WIDTH = 18,
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parameter SIM_FRAME_COUNTER_WIDTH = 18,
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parameter PARAM_INP_PING_LENGTH = 50,
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parameter FRAME_PERIOD = 1000,
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parameter OUT_SAMP_A_SQ_WIDTH = 20,
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parameter OUT_SAMP_A_SQ_OFFS = 18,
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parameter INP_FILE = "IQ_chirp_signal.txt",
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parameter PING_FILE = "IQ_chirp_ping.txt",
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parameter SIM_DURATION = 16000000 // simulation duration after reset duration
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`endif
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`ifdef test_chirp
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parameter PING_FROM_INPUT_SIGNAL = 1,
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parameter INP_SAMP_WIDTH = 14,
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parameter PING_ADDR_WIDTH = 11,
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parameter FRAME_ADDR_WIDTH = 18,
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parameter CONV_MEM_BLOCK_ADDR_WIDTH = 10,
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parameter OUT_SAMP_WIDTH = 18,
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parameter CLK_TO_SAMP_ADDR_WIDTH = 11,
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parameter CLK_TO_SAMP_RATIO = 2000,
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parameter SIM_FRAME_ADDR_COUNTER_WIDTH = 18,
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parameter SIM_FRAME_COUNTER_WIDTH = 18,
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parameter PARAM_INP_PING_LENGTH = 50,
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parameter FRAME_PERIOD = 8000,
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parameter OUT_SAMP_A_SQ_WIDTH = 20,
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parameter OUT_SAMP_A_SQ_OFFS = 16,
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parameter INP_FILE = "IQ_chirp_signal.txt",
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parameter PING_FILE = "IQ_chirp_ping.txt",
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parameter SIM_DURATION = 24000000 // simulation duration after reset duration
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`endif
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);
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reg clk; // clock
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reg reset; // reset
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reg inp_clk; // samples strobes
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wire [3:0] count;
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reg inp_ping_start; // start of ping
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reg [INP_SAMP_WIDTH - 1:0] inp_samp_I; // input samples In-phase
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reg [INP_SAMP_WIDTH - 1:0] inp_samp_Q; // input samples Quadrature
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reg [PING_ADDR_WIDTH - 1:0] inp_ping_length; // ping pulse length
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// parallel interface to coefficients RAM
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reg IOB_ping_from_Rx; // 1 - get ping from input samples; 0 - do not get ping from input samples, ping is written to RAM assumed
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reg IOB_ping_RAM_CS; // ping RAM - RAM select, should be 1 for not to fill RAM with input samples
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wire signed [INP_SAMP_WIDTH - 1:0] IOB_ping_RAM_D; // ping RAM - data Re
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reg signed [INP_SAMP_WIDTH - 1:0] IOB_ping_RAM_D_reg; // ping RAM - data Re
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//reg signed [INP_SAMP_WIDTH - 1:0] IOB_ping_RAM_D_I; // RAM зондирующего импульса, data Re
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//reg signed [INP_SAMP_WIDTH - 1:0] IOB_ping_RAM_D_Q; // RAM зондирующего импульса, data Im
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reg signed [PING_ADDR_WIDTH - 1:0] IOB_ping_RAM_A; // ping RAM - address
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reg IOB_ping_RAM_IQ; //
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reg IOB_ping_RAM_WR; //
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reg IOB_ping_RAM_RD; //
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reg IOB_ping_RAM_load_ready;
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wire [OUT_SAMP_WIDTH - 1:0] out_samp_I; // output samples, processing result
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wire [OUT_SAMP_WIDTH - 1:0] out_samp_Q; // output samples, processing result
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wire signed [OUT_SAMP_A_SQ_WIDTH - 1:0] out_samp_A_sq; // summ of squares
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wire out_samp_strobe; // output samples strobes
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wire out_frame_strobe; // ping strobes
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//reg [INP_SAMP_WIDTH - 1:0] inp_signal_file [0:32767];
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reg [15:0] inp_signal_file [0:8191]; // output storage
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reg [15:0] ping_file [0:4095]; // ping storage
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reg [CLK_TO_SAMP_ADDR_WIDTH - 1:0] clk_to_samp_counter; // counter of number of sample in the ping period
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reg [SIM_FRAME_ADDR_COUNTER_WIDTH - 1:0] frame_addr_counter; // address in frame counter
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reg [SIM_FRAME_COUNTER_WIDTH - 1:0] frame_counter; // frame number counter
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integer cpu_io_counter;
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FIR_cascaded
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#(
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.INP_SAMP_WIDTH (INP_SAMP_WIDTH),
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.PING_ADDR_WIDTH (PING_ADDR_WIDTH),
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.FRAME_ADDR_WIDTH (FRAME_ADDR_WIDTH),
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.CONV_MEM_BLOCK_ADDR_WIDTH (CONV_MEM_BLOCK_ADDR_WIDTH),
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.OUT_SAMP_WIDTH (OUT_SAMP_WIDTH),
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.CLK_TO_SAMP_ADDR_WIDTH (CLK_TO_SAMP_ADDR_WIDTH),
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.OUT_SAMP_A_SQ_WIDTH (OUT_SAMP_A_SQ_WIDTH),
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.OUT_SAMP_A_SQ_OFFS (OUT_SAMP_A_SQ_OFFS)
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)
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FIR_cascaded_DUT (
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.clk (clk),
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.reset (reset),
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.inp_clk (inp_clk),
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.inp_ping_start (inp_ping_start),
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.inp_samp_I (inp_samp_I),
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.inp_samp_Q (inp_samp_Q),
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.inp_ping_length (inp_ping_length),
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.IOB_ping_from_Rx (IOB_ping_from_Rx),
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.IOB_ping_RAM_CS (IOB_ping_RAM_CS),
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.IOB_ping_RAM_D (IOB_ping_RAM_D),
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.IOB_ping_RAM_IQ (IOB_ping_RAM_IQ),
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.IOB_ping_RAM_A (IOB_ping_RAM_A),
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.IOB_ping_RAM_WR (IOB_ping_RAM_WR),
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.IOB_ping_RAM_RD (IOB_ping_RAM_RD),
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.out_samp_I (out_samp_I),
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.out_samp_Q (out_samp_Q),
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.out_samp_A_sq (out_samp_A_sq),
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.out_samp_strobe (out_samp_strobe),
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.out_frame_strobe (out_frame_strobe)
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);
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initial begin
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$dumpfile("test.vcd");
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$dumpvars(1, FIR_cascaded_tb, FIR_cascaded_DUT,
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Juzujka |
FIR_cascaded_DUT.out_samp_Q_reg,
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FIR_cascaded_DUT.multiplier_ping_Q[0], FIR_cascaded_DUT.out_samp_acc_Q[0], FIR_cascaded_DUT.multiplier_echo_Q[0]
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//,FIR_cascaded_DUT.multiplier_ping_Q[1], FIR_cascaded_DUT.out_samp_acc_Q[1], FIR_cascaded_DUT.multiplier_echo_Q[1]
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//,FIR_cascaded_DUT.multiplier_ping_Q[2], FIR_cascaded_DUT.out_samp_acc_Q[2], FIR_cascaded_DUT.multiplier_echo_Q[2]
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//,FIR_cascaded_DUT.multiplier_ping_Q[3], FIR_cascaded_DUT.out_samp_acc_Q[3], FIR_cascaded_DUT.multiplier_echo_Q[3]
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,FIR_cascaded_DUT.ping_RAM_W_I[0]
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//,FIR_cascaded_DUT.ping_RAM_A
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,FIR_cascaded_DUT.ping_RAM_D_I[0]
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);
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clk = 0;
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reset = 0;
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inp_clk = 0;
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inp_ping_start = 0;
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clk_to_samp_counter = 0;
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frame_addr_counter = 0;
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frame_counter = 0;
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inp_ping_length = PARAM_INP_PING_LENGTH;
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Juzujka |
IOB_ping_from_Rx = PING_FROM_INPUT_SIGNAL;
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IOB_ping_RAM_load_ready = 0;
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Juzujka |
IOB_ping_RAM_CS = 1;
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IOB_ping_RAM_D_reg = {INP_SAMP_WIDTH{1'bZ}};
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IOB_ping_RAM_IQ = 0;
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IOB_ping_RAM_A = 0;
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IOB_ping_RAM_WR = 1;
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IOB_ping_RAM_RD = 0;
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cpu_io_counter = 0;
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$readmemh(INP_FILE, inp_signal_file);
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$readmemh(PING_FILE, ping_file);
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IOB_ping_RAM_D_reg = ping_file[cpu_io_counter];
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IOB_ping_RAM_IQ = cpu_io_counter[0];
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IOB_ping_RAM_A = cpu_io_counter[PING_ADDR_WIDTH:1];
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inp_samp_I <= inp_signal_file[frame_addr_counter*2];
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inp_samp_Q <= inp_signal_file[frame_addr_counter*2 + 1];
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#20 reset = 1;
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#20 reset = 0;
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#SIM_DURATION $finish;
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end
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always
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#10 clk = !clk;
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always@(negedge clk)
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begin
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4 |
Juzujka |
if (IOB_ping_RAM_load_ready == 1) begin
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if (clk_to_samp_counter == CLK_TO_SAMP_RATIO - 1) begin // generate sample
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clk_to_samp_counter <= 0;
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inp_clk <= 1;
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inp_samp_I <= inp_signal_file[(frame_addr_counter)*2];
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inp_samp_Q <= inp_signal_file[(frame_addr_counter)*2 + 1];
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if (frame_addr_counter == FRAME_PERIOD) begin // ping start
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frame_addr_counter <= 0;
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frame_counter <= frame_counter + 1;
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end else begin
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frame_addr_counter <= frame_addr_counter + 1;
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end
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inp_ping_start <= frame_addr_counter == 0;
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264 |
2 |
Juzujka |
end else begin
|
265 |
4 |
Juzujka |
if (clk_to_samp_counter == CLK_TO_SAMP_RATIO / 2) begin
|
266 |
|
|
inp_clk <= 0;
|
267 |
|
|
end
|
268 |
|
|
clk_to_samp_counter <= clk_to_samp_counter + 1;
|
269 |
2 |
Juzujka |
end
|
270 |
4 |
Juzujka |
if (clk_to_samp_counter == 0) begin
|
271 |
|
|
end else if (clk_to_samp_counter == CLK_TO_SAMP_RATIO / 2) begin
|
272 |
|
|
end
|
273 |
2 |
Juzujka |
end else begin
|
274 |
4 |
Juzujka |
frame_addr_counter <= 0;
|
275 |
2 |
Juzujka |
end
|
276 |
|
|
end
|
277 |
|
|
|
278 |
|
|
assign IOB_ping_RAM_D = IOB_ping_RAM_WR ? IOB_ping_RAM_D_reg : {INP_SAMP_WIDTH{1'bZ}};
|
279 |
|
|
|
280 |
|
|
always @ (negedge clk) begin
|
281 |
|
|
if (reset) begin
|
282 |
|
|
cpu_io_counter <= 0;
|
283 |
|
|
end else begin
|
284 |
4 |
Juzujka |
if (cpu_io_counter <= (2**PING_ADDR_WIDTH) * 2) begin
|
285 |
2 |
Juzujka |
cpu_io_counter <= cpu_io_counter + 1;
|
286 |
|
|
end
|
287 |
4 |
Juzujka |
if (cpu_io_counter < (2**PING_ADDR_WIDTH) * 2) begin
|
288 |
2 |
Juzujka |
IOB_ping_RAM_CS = 1;
|
289 |
|
|
IOB_ping_RAM_D_reg = ping_file[cpu_io_counter];
|
290 |
|
|
IOB_ping_RAM_IQ = cpu_io_counter[0];
|
291 |
|
|
IOB_ping_RAM_A = cpu_io_counter[PING_ADDR_WIDTH:1];
|
292 |
|
|
IOB_ping_RAM_WR = 1;
|
293 |
|
|
IOB_ping_RAM_RD = 0;
|
294 |
|
|
end else begin
|
295 |
4 |
Juzujka |
IOB_ping_RAM_load_ready = 1;
|
296 |
2 |
Juzujka |
IOB_ping_RAM_CS = 0;
|
297 |
|
|
IOB_ping_RAM_IQ = 0;
|
298 |
|
|
IOB_ping_RAM_A = 0;
|
299 |
|
|
IOB_ping_RAM_WR = 0;
|
300 |
|
|
IOB_ping_RAM_RD = 0;
|
301 |
|
|
end
|
302 |
|
|
end
|
303 |
|
|
end //always
|
304 |
|
|
endmodule
|