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PROGRAMMABLE ELECTRONIC(MEE 10203)
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Mohd Syukur bin Azizan | Mohd Nazimudin bin Ibrahim
1
PROGRAMMABLE ELECTRONIC (MEE 10203)
PART B
Write a Word document discussing the following projects. Submit supporting VHDL projects code. Demonstrate the working projects to the instructor (and class). If you are not able to complete this assignment by the due date, submit a progress report documenting your work to that time.
1. Design and implement a DE2/DE1 project that demonstrates a binary to BCD converter. Use the switches SW[15:0] to define the input binary value and the seven-segment displays to show the resulting decimal equivalent. For example, if the first five switches are on: 0x1F, the seven-segment display should read 31.
Answers according to table below
Figure 1.1 : How to convert from binary to BCD.
Output
Input
Mohd Syukur bin Azizan | Mohd Nazimudin bin Ibrahim
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PROGRAMMABLE ELECTRONIC (MEE 10203)
Answers
According to the Figure 1.1 to slove the problem is:
1. Define the input is 16 bits and the ouput is 20 bits. 2. Define the variable q is 36 bits. 3. Shift to 3 step to left. 4. The variable q valaue q (18 downto 3) equal to input value. 5. At this stage (shift 3 to left) if variable q(19 downto 16) is bigger than 4 so q(19 downto 16) will
add 3. 6. Shift to left for remain 13 step and check if q(19 downto 16), q(23 downto 20), q(27 downto 24),
q(31 downto 28) and q(35 downto 32) is bigger than 4 so plus with 3. 7. Lastly the ouput will get the q (35 downto 16) value.
Binary to BCD Converter
library IEEE;
use IEEE.STD_LOGIC_1164.all;
use IEEE.STD_LOGIC_UNSIGNED.all;
entity BintoBCD16 is
port
(
B: in STD_LOGIC_VECTOR (15 downto 0);
BCD1, BCD2, BCD3, BCD4, BCD5: out STD_LOGIC_VECTOR (3 downto 0)
);
end BintoBCD16;
architecture soalan1 of BintoBCD16 is
begin
Mohd Syukur bin Azizan | Mohd Nazimudin bin Ibrahim
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PROGRAMMABLE ELECTRONIC (MEE 10203)
process (B)
variable q : STD_LOGIC_VECTOR (39 downto 0);
begin
for n in 0 to 39 loop -- clear the q to all ‘0’
q(n) := '0';
end loop;
q (18 downto 3) := B (15 downto 0);
for n in 0 to 12 loop -- shift 13 time according to the table in figure 1.1
if q (19 downto 16) > 4 then
q (19 downto 16) := q (19 downto 16) + 3;
end if;
if q (23 downto 20) > 4 then
q (23 downto 20) := q (23 downto 20) + 3;
end if;
if q (27 downto 24) > 4 then
q (27 downto 24) := q (27 downto 24) + 3;
end if;
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PROGRAMMABLE ELECTRONIC (MEE 10203)
if q (31 downto 28) > 4 then
q (31 downto 28) := q (31 downto 28) + 3;
end if;
if q (35 downto 32) > 4 then
q (35 downto 32) := q (35 downto 32) + 3;
end if;
q(36 downto 1) := q(35 downto 0); -- shift bit
end loop;
BCD1 <= q (19 downto 16);
BCD2 <= q (23 downto 20);
BCD3 <= q (27 downto 24);
BCD4 <= q (31 downto 28);
BCD5 <= q (35 downto 32);
end process;
end soalan1;
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PROGRAMMABLE ELECTRONIC (MEE 10203)
Figure 1.2: Compilation without error Binary to BCD
Figure 1.3 : Waveform analysis compare to Figure 1.1.
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PROGRAMMABLE ELECTRONIC (MEE 10203)
Figure 1.4 : Blok diagram
BINARY TO BCD
CONVERTER
7 SEGMENT
DISPLAY
(17 bit) Input
(20 bit) Output
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PROGRAMMABLE ELECTRONIC (MEE 10203)
BCD to 7 Segment Modification
library IEEE;
use IEEE.STD_LOGIC_1164.all;
use IEEE.STD_LOGIC_UNSIGNED.all;
entity BintoBCD16 is
port
(
B: in STD_LOGIC_VECTOR (15 downto 0);
unit : out STD_LOGIC_VECTOR (6 downto 0); -- output to 7 segment unit
ten : out STD_LOGIC_VECTOR (6 downto 0); -- output to 7 segment ten
hundred : out STD_LOGIC_VECTOR (6 downto 0); -- output to 7 segment hundred
thousan : out STD_LOGIC_VECTOR (6 downto 0); -- output to 7 segment thousan
tthousan : out STD_LOGIC_VECTOR (6 downto 0) -- output to 7 segment unit ten thousan
);
end BintoBCD16;
architecture soalan1 of BintoBCD16 is
begin
process (B)
variable q : STD_LOGIC_VECTOR (39 downto 0);
variable BCD1: STD_LOGIC_VECTOR (3 downto 0);
variable BCD2: STD_LOGIC_VECTOR (3 downto 0);
variable BCD3: STD_LOGIC_VECTOR (3 downto 0);
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PROGRAMMABLE ELECTRONIC (MEE 10203)
variable BCD4: STD_LOGIC_VECTOR (3 downto 0);
variable BCD5: STD_LOGIC_VECTOR (3 downto 0);
begin
for n in 0 to 39 loop
q(n) := '0';
end loop;
q (18 downto 3) := B (15 downto 0);
for n in 0 to 12 loop
if q (19 downto 16) > 4 then -- check if unit large than 4
q (19 downto 16) := q (19 downto 16) + 3;
end if;
if q (23 downto 20) > 4 then -- check if ten large than 4
q (23 downto 20) := q (23 downto 20) + 3;
end if;
if q (27 downto 24) > 4 then -- check if hundred large than 4
q (27 downto 24) := q (27 downto 24) + 3;
end if;
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PROGRAMMABLE ELECTRONIC (MEE 10203)
if q (31 downto 28) > 4 then -- check if thousand large than 4
q (31 downto 28) := q (31 downto 28) + 3;
end if;
if q (35 downto 32) > 4 then -- check if ten thousand large than 4
q (35 downto 32) := q (35 downto 32) + 3;
end if;
q(36 downto 1) := q(35 downto 0); -- shift bit
end loop;
BCD1 := q (19 downto 16); -- output for BCD unit
BCD2 := q (23 downto 20); -- output for BCD ten
BCD3 := q (27 downto 24); -- output for BCD hundred
BCD4 := q (31 downto 28); -- output for BCD thousand
BCD5 := q (35 downto 32); -- output for BCD ten thousand
CASE BCD1 IS
when "0000" => unit <= "1000000" ; -- 0
when "0001" => unit <= "1111001" ; -- 1
when "0010" => unit <= "0100100" ; -- 2
when "0011" => unit <= "0110000" ; -- 3
when "0100" => unit <= "0011001" ; -- 4
when "0101" => unit <= "0010010" ; -- 5
when "0110" => unit <= "0000010" ; -- 6
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PROGRAMMABLE ELECTRONIC (MEE 10203)
when "0111" => unit <= "1111000" ; -- 7
when "1000" => unit <= "0000000" ; -- 8
when "1001" => unit <= "0010000" ; -- 9
when "1010" => unit <= "0001000" ; -- 10 or A
when "1011" => unit <= "0000011" ; -- 11 or B
when "1100" => unit <= "1000110" ; -- 12 or C
when "1101" => unit <= "0100001" ; -- 13 or D
when "1110" => unit <= "0000110" ; -- 14 or E
when "1111" => unit <= "0001110" ; -- 15 or F
when others => unit <= "1111111" ; -- JUST TURN ON ALL LIGHTS
end case;
CASE BCD2 IS
when "0000" => ten <= "1000000" ; -- 0
when "0001" => ten <= "1111001" ; -- 1
when "0010" => ten <= "0100100" ; -- 2
when "0011" => ten <= "0110000" ; -- 3
when "0100" => ten <= "0011001" ; -- 4
when "0101" => ten <= "0010010" ; -- 5
when "0110" => ten <= "0000010" ; -- 6
when "0111" => ten <= "1111000" ; -- 7
when "1000" => ten <= "0000000" ; -- 8
when "1001" => ten <= "0010000" ; -- 9
when "1010" => ten <= "0001000" ; -- 10 or A
when "1011" => ten <= "0000011" ; -- 11 or B
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PROGRAMMABLE ELECTRONIC (MEE 10203)
when "1100" => ten <= "1000110" ; -- 12 or C
when "1101" => ten <= "0100001" ; -- 13 or D
when "1110" => ten <= "0000110" ; -- 14 or E
when "1111" => ten <= "0001110" ; -- 15 or F
when others => ten <= "1111111" ; -- JUST TURN ON ALL LIGHTS
end case;
CASE BCD3 IS
when "0000" => hundred <= "1000000" ; -- 0
when "0001" => hundred <= "1111001" ; -- 1
when "0010" => hundred <= "0100100" ; -- 2
when "0011" => hundred <= "0110000" ; -- 3
when "0100" => hundred <= "0011001" ; -- 4
when "0101" => hundred <= "0010010" ; -- 5
when "0110" => hundred <= "0000010" ; -- 6
when "0111" => hundred <= "1111000" ; -- 7
when "1000" => hundred <= "0000000" ; -- 8
when "1001" => hundred <= "0010000" ; -- 9
when "1010" => hundred <= "0001000" ; -- 10 or A
when "1011" => hundred <= "0000011" ; -- 11 or B
when "1100" => hundred <= "1000110" ; -- 12 or C
when "1101" => hundred <= "0100001" ; -- 13 or D
when "1110" => hundred <= "0000110" ; -- 14 or E
when "1111" => hundred <= "0001110" ; -- 15 or F
when others => hundred <= "1111111" ; -- JUST TURN ON ALL LIGHTS
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PROGRAMMABLE ELECTRONIC (MEE 10203)
end case;
CASE BCD4 IS
when "0000" => thousan <= "1000000" ; -- 0
when "0001" => thousan <= "1111001" ; -- 1
when "0010" => thousan <= "0100100" ; -- 2
when "0011" => thousan <= "0110000" ; -- 3
when "0100" => thousan <= "0011001" ; -- 4
when "0101" => thousan <= "0010010" ; -- 5
when "0110" => thousan <= "0000010" ; -- 6
when "0111" => thousan <= "1111000" ; -- 7
when "1000" => thousan <= "0000000" ; -- 8
when "1001" => thousan <= "0010000" ; -- 9
when "1010" => thousan <= "0001000" ; -- 10 or A
when "1011" => thousan <= "0000011" ; -- 11 or B
when "1100" => thousan <= "1000110" ; -- 12 or C
when "1101" => thousan <= "0100001" ; -- 13 or D
when "1110" => thousan <= "0000110" ; -- 14 or E
when "1111" => thousan <= "0001110" ; -- 15 or F
when others => thousan <= "1111111" ; -- JUST TURN ON ALL LIGHTS
end case;
CASE BCD5 IS
when "0000" => tthousan <= "1000000" ; -- 0
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PROGRAMMABLE ELECTRONIC (MEE 10203)
when "0001" => tthousan <= "1111001" ; -- 1
when "0010" => tthousan <= "0100100" ; -- 2
when "0011" => tthousan <= "0110000" ; -- 3
when "0100" => tthousan <= "0011001" ; -- 4
when "0101" => tthousan <= "0010010" ; -- 5
when "0110" => tthousan <= "0000010" ; -- 6
when "0111" => tthousan <= "1111000" ; -- 7
when "1000" => tthousan <= "0000000" ; -- 8
when "1001" => tthousan <= "0010000" ; -- 9
when "1010" => tthousan <= "0001000" ; -- 10 or A
when "1011" => tthousan <= "0000011" ; -- 11 or B
when "1100" => tthousan <= "1000110" ; -- 12 or C
when "1101" => tthousan <= "0100001" ; -- 13 or D
when "1110" => tthousan <= "0000110" ; -- 14 or E
when "1111" => tthousan <= "0001110" ; -- 15 or F
when others => tthousan <= "1111111" ; -- JUST TURN ON ALL LIGHTS
end case;
end process;
end soalan1;
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PROGRAMMABLE ELECTRONIC (MEE 10203)
Figure 1.5: Compile the BCD to 7 Segment without error.
Figure 1.6 : Waveform BCD to 7 Segment
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PROGRAMMABLE ELECTRONIC (MEE 10203)
Figure 1.7: Device Setting.
Figure 1.8 : Pin Planner Setting
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PROGRAMMABLE ELECTRONIC (MEE 10203)
Figure 1.9 Download to DE2 board
Figure 1.10 The output result
