Alex Wong
Published

Software Defined Radio on FPGA from Digilent Design Contest

With this project, we want to create a new platform for communication.

IntermediateFull instructions provided5 hours916
Software Defined Radio on FPGA from Digilent Design Contest

Things used in this project

Hardware components

Arty Z7-20
Digilent Arty Z7-20
×1

Software apps and online services

Vivado Design Suite
Xilinx Vivado Design Suite
MATLAB
MATLAB
Xilinx ISE Design Suite

Story

Read more

Schematics

Project Documentation

Project Presentation

Code

Project Code

VHDL
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_unsigned.ALL;



entity Tx_main is
    Port ( clk,reset : in STD_LOGIC;
           Tx_out : out STD_LOGIC_VECTOR (7 downto 0));
end Tx_main;

architecture main_flow of Tx_main is
    component Multiplier is
    Port ( A,B : in STD_LOGIC_VECTOR (7 downto 0);
           D : out STD_LOGIC_VECTOR (7 downto 0));
    end component; 
    --------------- Byte_Array definitions ------------------------
    type Byte_Array is array(natural range <>) of std_logic_vector(7 downto 0);
    constant sin_rom  : Byte_Array(1023 downto 0):=("00000001","00000010","00000010","00000011","00000100","00000101","00000101","00000110","00000111","00001000","00001001","00001001","00001010","00001011","00001100","00001100","00001101","00001110","00001111","00010000","00010000","00010001","00010010","00010011","00010011","00010100","00010101","00010110","00010110","00010111","00011000","00011001","00011010","00011010","00011011","00011100","00011101","00011101","00011110","00011111","00100000","00100000","00100001","00100010","00100011","00100011","00100100","00100101","00100110","00100110","00100111","00101000","00101001","00101001","00101010","00101011","00101100","00101100","00101101","00101110","00101110","00101111","00110000","00110001","00110001","00110010","00110011","00110011","00110100","00110101","00110110","00110110","00110111","00111000","00111000","00111001","00111010","00111010","00111011","00111100","00111101","00111101","00111110","00111111","00111111","01000000","01000001","01000001","01000010","01000011","01000011","01000100","01000101","01000101","01000110","01000111","01000111","01001000","01001000","01001001","01001010","01001010","01001011","01001100","01001100","01001101","01001110","01001110","01001111","01001111","01010000","01010001","01010001","01010010","01010010","01010011","01010100","01010100","01010101","01010101","01010110","01010110","01010111","01011000","01011000","01011001","01011001","01011010","01011010","01011011","01011011","01011100","01011101","01011101","01011110","01011110","01011111","01011111","01100000","01100000","01100001","01100001","01100010","01100010","01100011","01100011","01100100","01100100","01100101","01100101","01100110","01100110","01100110","01100111","01100111","01101000","01101000","01101001","01101001","01101010","01101010","01101010","01101011","01101011","01101100","01101100","01101101","01101101","01101101","01101110","01101110","01101111","01101111","01101111","01110000","01110000","01110000","01110001","01110001","01110001","01110010","01110010","01110010","01110011","01110011","01110011","01110100","01110100","01110100","01110101","01110101","01110101","01110110","01110110","01110110","01110110","01110111","01110111","01110111","01111000","01111000","01111000","01111000","01111001","01111001","01111001","01111001","01111010","01111010","01111010","01111010","01111010","01111011","01111011","01111011","01111011","01111011","01111100","01111100","01111100","01111100","01111100","01111100","01111101","01111101","01111101","01111101","01111101","01111101","01111101","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111101","01111101","01111101","01111101","01111101","01111101","01111101","01111100","01111100","01111100","01111100","01111100","01111100","01111011","01111011","01111011","01111011","01111011","01111010","01111010","01111010","01111010","01111010","01111001","01111001","01111001","01111001","01111000","01111000","01111000","01111000","01110111","01110111","01110111","01110110","01110110","01110110","01110110","01110101","01110101","01110101","01110100","01110100","01110100","01110011","01110011","01110011","01110010","01110010","01110010","01110001","01110001","01110001","01110000","01110000","01110000","01101111","01101111","01101111","01101110","01101110","01101101","01101101","01101101","01101100","01101100","01101011","01101011","01101010","01101010","01101010","01101001","01101001","01101000","01101000","01100111","01100111","01100110","01100110","01100110","01100101","01100101","01100100","01100100","01100011","01100011","01100010","01100010","01100001","01100001","01100000","01100000","01011111","01011111","01011110","01011110","01011101","01011101","01011100","01011011","01011011","01011010","01011010","01011001","01011001","01011000","01011000","01010111","01010110","01010110","01010101","01010101","01010100","01010100","01010011","01010010","01010010","01010001","01010001","01010000","01001111","01001111","01001110","01001110","01001101","01001100","01001100","01001011","01001010","01001010","01001001","01001000","01001000","01000111","01000111","01000110","01000101","01000101","01000100","01000011","01000011","01000010","01000001","01000001","01000000","00111111","00111111","00111110","00111101","00111101","00111100","00111011","00111010","00111010","00111001","00111000","00111000","00110111","00110110","00110110","00110101","00110100","00110011","00110011","00110010","00110001","00110001","00110000","00101111","00101110","00101110","00101101","00101100","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    constant cos_rom  : Byte_Array(1023 downto 0):=("01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111111","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111110","01111101","01111101","01111101","01111101","01111101","01111101","01111101","01111100","01111100","01111100","01111100","01111100","01111100","01111011","01111011","01111011","01111011","01111011","01111010","01111010","01111010","01111010","01111010","01111001","01111001","01111001","01111001","01111000","01111000","01111000","01111000","01110111","01110111","01110111","01110110","01110110","01110110","01110110","01110101","01110101","01110101","01110100","01110100","01110100","01110011","01110011","01110011","01110010","01110010","01110010","01110001","01110001","01110001","01110000","01110000","01110000","01101111","01101111","01101111","01101110","01101110","01101101","01101101","01101101","01101100","01101100","01101011","01101011","01101010","01101010","01101010","01101001","01101001","01101000","01101000","01100111","01100111","01100110","01100110","01100110","01100101","01100101","01100100","01100100","01100011","01100011","01100010","01100010","01100001","01100001","01100000","01100000","01011111","01011111","01011110","01011110","01011101","01011101","01011100","01011011","01011011","01011010","01011010","01011001","01011001","01011000","01011000","01010111","01010110","01010110","01010101","01010101","01010100","01010100","01010011","01010010","01010010","01010001","01010001","01010000","01001111","01001111","01001110","01001110","01001101","01001100","01001100","01001011","01001010","01001010","01001001","01001000","01001000","01000111","01000111","01000110","01000101","01000101","01000100","01000011","01000011","01000010","01000001","01000001","01000000","00111111","00111111","00111110","00111101","00111101","00111100","00111011","00111010","00111010","00111001","00111000","00111000","00110111","00110110","00110110","00110101","00110100","00110011","00110011","00110010","00110001","00110001","00110000","00101111","00101110","00101110","00101101","00101100","00101100","00101011","00101010","00101001","00101001","00101000","00100111","00100110","00100110","00100101","00100100","00100011","00100011","00100010","00100001","00100000","00100000","00011111","00011110","00011101","00011101","00011100","00011011","00011010","00011010","00011001","00011000","00010111","00010110","00010110","00010101","00010100","00010011","00010011","00010010","00010001","00010000","00010000","00001111","00001110","00001101","00001100","00001100","00001011","00001010","00001001","00001001","00001000","00000111","00000110","00000101","00000101","00000100","00000011","00000010","00000010","00000001","00000000","11111111","11111110","11111110","11111101","11111100","11111011","11111011","11111010","11111001","11111000","11110111","11110111","11110110","11110101","11110100","11110100","11110011","11110010","11110001","11110000","11110000","11101111","11101110","11101101","11101101","11101100","11101011","11101010","11101010","11101001","11101000","11100111","11100110","11100110","11100101","11100100","11100011","11100011","11100010","11100001","11100000","11100000","11011111","11011110","11011101","11011101","11011100","11011011","11011010","11011010","11011001","11011000","11010111","11010111","11010110","11010101","11010100","11010100","11010011","11010010","11010010","11010001","11010000","11001111","11001111","11001110","11001101","11001101","11001100","11001011","11001010","11001010","11001001","11001000","11001000","11000111","11000110","11000110","11000101","11000100","11000011","11000011","11000010","11000001","11000001","11000000","10111111","10111111","10111110","10111101","10111101","10111100","10111011","10111011","10111010","10111001","10111001","10111000","10111000","10110111","10110110","10110110","10110101","10110100","10110100","10110011","10110010","10110010","10110001","10110001","10110000","10101111","10101111","10101110","10101110","10101101","10101100","10101100","10101011","10101011","10101010","10101010","10101001","10101000","10101000","10100111","10100111","10100110","10100110","10100101","10100101","10100100","10100011","10100011","10100010","10100010","10100001","10100001","10100000","10100000","10011111","10011111","10011110","10011110","10011101","10011101","10011100","10011100","10011011","10011011","10011010","10011010","10011010","10011001","10011001","10011000","10011000","10010111","10010111","10010110","10010110","10010110","10010101","10010101","10010100","10010100","10010011","10010011","10010011","10010010","10010010","10010001","10010001","10010001","10010000","10010000","10010000","10001111","10001111","10001111","10001110","10001110","10001110","10001101","10001101","10001101","10001100","10001100","10001100","10001011","10001011","10001011","10001010","10001010","10001010","10001010","10001001","10001001","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    constant RC_pos_rom : Byte_Array(1023 downto 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    constant RC_neg_rom : Byte_Array(1023 downto 0): =   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  
    ---------------- Signals -------------------------------
    signal i,j : std_logic_vector(9 downto 0):="0000000000";
    signal j_clk : std_logic;
    signal tx_up : std_logic_vector(7 downto 0);
    signal tx_dw : std_logic_vector(7 downto 0);
    signal RC_up : std_logic_vector(7 downto 0);
    signal RC_up_1 : std_logic_vector(7 downto 0);
    signal RC_up_2 : std_logic_vector(7 downto 0);
    signal RC_up_3 : std_logic_vector(7 downto 0);
    signal RC_up_4 : std_logic_vector(7 downto 0);
    signal RC_dw : std_logic_vector(7 downto 0);
    signal RC_dw_1 : std_logic_vector(7 downto 0);
    signal RC_dw_2 : std_logic_vector(7 downto 0);
    signal RC_dw_3 : std_logic_vector(7 downto 0);
    signal RC_dw_4 : std_logic_vector(7 downto 0);
    signal Data : std_logic_vector(7 downto 0);
    constant Data_str : Byte_Array(7 downto 0):=(x"00",x"11",x"33",x"55",x"00",x"AA",x"DD",x"FF");
    signal Up_Data : std_logic_vector(3 downto 0);
    signal Dw_Data : std_logic_vector(3 downto 0);
    signal indx : std_logic_vector(1 downto 0):="00";
    signal index : std_logic_vector(2 downto 0):="000";
    signal indx_clk : std_logic;
    signal index_clk : std_logic;
    signal sin : std_logic_vector(7 downto 0);
    signal cos : std_logic_vector(7 downto 0);
begin
    Upper_Multiplier: Multiplier port map(a => RC_up, b => cos, d => tx_up);
    Lower_Multiplier: Multiplier port map(a => RC_dw, b => sin, d => tx_dw);
    
    process(clk,reset)
    begin
        if reset = '1' then
            i <= "0000000000";
        elsif clk'event and clk='0' then
            i <= i + 1;
        elsif clk'event and clk='1' then
            Tx_out <= tx_up + tx_dw+128;
        end if;
    end process;
    j_clk <= i(5);
    process(j_clk,reset)
    begin
        if reset = '1' then
            j <= "0000000000";
        elsif j_clk'event and j_clk='0' then
            j <= j + 1;
        end if;
    end process;
    indx_clk <= j(7);
    process(indx_clk,reset)
    begin
        if reset = '1' then
            indx <= "00";
        elsif indx_clk'event and indx_clk='0' then
            indx <= indx + 1;
            if indx = "00" then
                up_data(0) <= data(0);
                dw_data(0) <= data(1);
            elsif indx = "01" then
                up_data(1) <= data(2);
                dw_data(1) <= data(3);
            elsif indx = "10" then
                up_data(2) <= data(4);
                dw_data(2) <= data(5);
            elsif indx = "11" then
                up_data(3) <= data(6);
                dw_data(3) <= data(7);
            end if;
        end if;
    end process;
    index_clk <= indx(1);
    process(index_clk,reset)
    begin
        if reset = '1' then
            index <= "000";
        elsif index_clk'event and index_clk='0' then
            index <= index + 1;
        end if;
    end process;

    data <= data_str(conv_integer(index));

    sin <= sin_rom(conv_integer(i));
    cos <= cos_rom(conv_integer(i));
    RC_up <= RC_up_1 + RC_up_2 + RC_up_3 + RC_up_4;
    RC_dw <= RC_dw_1 + RC_dw_2 + RC_dw_3 + RC_dw_4;
   RC_up_1 <= RC_pos_rom(conv_integer(j))     when up_data(0)='1' else RC_neg_rom(conv_integer(j))     when up_data(0)='0' else "ZZZZZZZZ";
   RC_up_2 <= RC_pos_rom(conv_integer(j+256)) when up_data(1)='1' else RC_neg_rom(conv_integer(j+256)) when up_data(1)='0' else "ZZZZZZZZ";
   RC_up_3 <= RC_pos_rom(conv_integer(j+512)) when up_data(2)='1' else RC_neg_rom(conv_integer(j+512)) when up_data(2)='0' else "ZZZZZZZZ";
   RC_up_4 <= RC_pos_rom(conv_integer(j+768)) when up_data(3)='1' else RC_neg_rom(conv_integer(j+768)) when up_data(3)='0' else "ZZZZZZZZ";
   RC_dw_1 <= RC_pos_rom(conv_integer(j))     when dw_data(0)='1' else RC_neg_rom(conv_integer(j))     when dw_data(0)='0' else "ZZZZZZZZ";
   RC_dw_2 <= RC_pos_rom(conv_integer(j+256)) when dw_data(1)='1' else RC_neg_rom(conv_integer(j+256)) when dw_data(1)='0' else "ZZZZZZZZ";
   RC_dw_3 <= RC_pos_rom(conv_integer(j+512)) when dw_data(2)='1' else RC_neg_rom(conv_integer(j+512)) when dw_data(2)='0' else "ZZZZZZZZ";
   RC_dw_4 <= RC_pos_rom(conv_integer(j+768)) when dw_data(3)='1' else RC_neg_rom(conv_integer(j+768)) when dw_data(3)='0' else "ZZZZZZZZ";
    
end main_flow;


Appendix B: Upper Multiplier


library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_unsigned.ALL;



entity Multiplier is
    Port ( A,B : in STD_LOGIC_VECTOR (7 downto 0);
           D : out STD_LOGIC_VECTOR (7 downto 0));
end Multiplier;

architecture Logic_Flow of Multiplier is
signal A_mag : STD_LOGIC_VECTOR (7 downto 0);
signal B_mag : STD_LOGIC_VECTOR (7 downto 0);
signal sign : STD_LOGIC;
signal D0,D1,D2,D3,D4,D5,D6,D7,Dtot,Dtotn : STD_LOGIC_VECTOR(15 downto 0):=x"0000";
--signal Dpos,Dneg : STD_LOGIC_VECTOR(7 downto 0);
begin

A_mag <= '0' & A(6 downto 0) when A(7)= '0' else not A + 1;
B_mag <= '0' & B(6 downto 0) when B(7)= '0' else not B + 1;

sign <= A(7) xor B(7);

D0(7 downto 0) <= A_mag when B_mag(0)='1' else x"00";
D1(8 downto 1) <= A_mag when B_mag(1)='1' else x"00";
D2(9 downto 2) <= A_mag when B_mag(2)='1' else x"00";
D3(10 downto 3) <= A_mag when B_mag(3)='1' else x"00";
D4(11 downto 4) <= A_mag when B_mag(4)='1' else x"00";
D5(12 downto 5) <= A_mag when B_mag(5)='1' else x"00";
D6(13 downto 6) <= A_mag when B_mag(6)='1' else x"00";
D7(14 downto 7) <= A_mag when B_mag(7)='1' else x"00";
Dtot <= D0 + D1 + D2 + D3 + D4 + D5 + D6 + D7;
Dtotn <= not Dtot +1;
D <= x"00" when A=x"00" or B=x"00" else '0' & Dtot(14 downto 8) when sign='0' else '1' & Dtotn(14 downto 8);


--Dpos <= '0' & Dtot(14 downto   8);
--Dneg <= not Dpos + 1;
--D <= Dpos when sign = '0' else Dneg;

end Logic_Flow;


Appendix C: Lower Multiplier


library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_unsigned.ALL;



entity Multiplier is
    Port ( A,B : in STD_LOGIC_VECTOR (7 downto 0);
           D : out STD_LOGIC_VECTOR (7 downto 0));
end Multiplier;

architecture Logic_Flow of Multiplier is
signal A_mag : STD_LOGIC_VECTOR (7 downto 0);
signal B_mag : STD_LOGIC_VECTOR (7 downto 0);
signal sign : STD_LOGIC;
signal D0,D1,D2,D3,D4,D5,D6,D7,Dtot,Dtotn : STD_LOGIC_VECTOR(15 downto 0):=x"0000";
--signal Dpos,Dneg : STD_LOGIC_VECTOR(7 downto 0);
begin

A_mag <= '0' & A(6 downto 0) when A(7)= '0' else not A + 1;
B_mag <= '0' & B(6 downto 0) when B(7)= '0' else not B + 1;

sign <= A(7) xor B(7);

D0(7 downto 0) <= A_mag when B_mag(0)='1' else x"00";
D1(8 downto 1) <= A_mag when B_mag(1)='1' else x"00";
D2(9 downto 2) <= A_mag when B_mag(2)='1' else x"00";
D3(10 downto 3) <= A_mag when B_mag(3)='1' else x"00";
D4(11 downto 4) <= A_mag when B_mag(4)='1' else x"00";
D5(12 downto 5) <= A_mag when B_mag(5)='1' else x"00";
D6(13 downto 6) <= A_mag when B_mag(6)='1' else x"00";
D7(14 downto 7) <= A_mag when B_mag(7)='1' else x"00";
Dtot <= D0 + D1 + D2 + D3 + D4 + D5 + D6 + D7;
Dtotn <= not Dtot +1;
D <= x"00" when A=x"00" or B=x"00" else '0' & Dtot(14 downto 8) when sign='0' else '1' & Dtotn(14 downto 8);


--Dpos <= '0' & Dtot(14 downto   8);
--Dneg <= not Dpos + 1;
--D <= Dpos when sign = '0' else Dneg;

end Logic_Flow;

Credits

Baran BOZKURT, Aydın Kaan DURUKAN & Muhammed Cevat ÇAKICI

Posted by Alex Wong

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