-
1 Last updated on 23rd January 2014
EXPERIMENT D5: VHDL SCHEMATIC DESIGN USING ALTERA
Related course: KEEE2232 (Digital Design)
OBJECTIVES: 1. To use VHDL language to display hexadecimal digit
through MAX+Plus JI software 2. To use ALTERA board to display
hexadecimal digit on 7-segment LED
EQUIPMENT: MAX+Plus II software and ALTERA Program Board (EPM
7128LS)
PREPARATIONS: Students need to learn and understand the MAX+Plus
II software, ALTERA University Program board and VHDL before
starting the experiments
REFERENCE(S): Refer to the main references of KEEE2232 (Digital
Design)
TESTS: TEST 1: USE VHDL TO DISPLAY HEXADECIMAL DIGIT ON ALTERA
BOARD TEST 2: USE THE VHDL FILE AND GRAPHIC EDITOR TO PRODUCE
BINARY TO HEXADECIMAL CONVERTER DESIGN ON ALTERA BOARD
TEST 1: USE VHDL TO DISPLAY HEXADECIMAL DIGIT ON ALTERA
BOARD
1. By using Max Plus II software, write the VHDL language as
shown below in the TEXT EDITOR File. Save the file as LED.vhd in
the folder C: MAKMALSISTEM DIGITAL.
2. Compile the files and corrected all the errors (if any). To
compile, go to COMPILER in Max PLUS II menu.
3. Please make sure the project name is same with the file
name.
Library IEEE; Use IEEE.std_logic_1164.all; Entity LED is Port(I:
in std_logic_vector(3 downto 0); O: out std_logic_vector(6 downto
0)); End LED; Architecture LED_arch of LED is begin with I select
O
-
2 Last updated on 23rd January 2014
all the below pin. Please refer to the attachment on the Pin
Configurations of EPM7128SLC84-6.
Table 1 Node Name Pin Locations Node Name Pin Locations
I0 I1 I2 I3
I/O pin I/O pin I/O pin I/O pin
O0 O1 O2 O3 O4 O5 O6
LED 7 segment pin LED 7 segment pin LED 7 segment pin LED 7
segment pin LED 7 segment pin LED 7 segment pin LED 7 segment
pin
3. Save and compile the file again. File => Create Default
Symbol. Symbol file for LED will be produced.
4. After the file is compiled, run the simulation operation.
Open the Waveform Editor file at the menu of MAX Plus II and get
the input and output nodes at the Node =>Enter Node from SNF
menu.
5. Set the value for I0-I3. Make sure the value for IO-l3 and
O0-O6 is Hexadecimal first. After that, the values for I0-l3 are
input by right-clicking the mouse at the alphabet r. Get the input
value from Overwrite => Count Value. Click OK. Display value of
0-F will be shown at I0-I3.
6. Save the file by using the file name given above. Simulate
the signal by using the Simulator located at the menu of MAX +Plus
II.
7. Check the output at O0-O6. Make sure the output is same as
the output obtained by using the VHDL in the previous
experiment.
INPUT VHDL PROGRAM INTO EPM7128SLC84-7 DEVICE
1. Before making any connection, make sure the switch is turned
off first. To use the MAX7000s, the following configuration has to
be done on the ALTERA board first.
2. Make sure the ALTERA board is connected to power supply
between 7 -12V DC. 3. Click at the MAX PLUS 11 => Programmer
menu. Check the screen display as
shown in Figure 1. 4. Click at the Program, and the VHDL data
will be input in EPM7128SLC84-6
Figure 1
-
3 Last updated on 23rd January 2014
EXERCISE:
Use DIP switch (S1-S4) as input I0-I3 and connect to the I/O
pins from ALTERA EPM7128SLC84-6 which had been defined in previous
stated. Change the input value by toggling the switch and record
down all the combinations as in Table 2.
Table 2 Switch combinations (I0-I3) 7 segment LED display
Hexadecimal
value S1 S2 S3 S4 g f e d c b a 0 0 0 0 0 1 0 1 0 1 1 1 1 0 0 1
1 1 0 0 1 0 1 0 1 1 1 0
Notes: LED 7 segment is active low device
Which of the switches (S1-S4) represents the LSB and MSB?
TEST 2: USE THE VHDL FILE AND GRAPHIC EDITOR TO PRODUCE BINARY
TO HEXADECIMAL CONVERTER DESIGN ON ALTERA BOARD
1. Open a new Graphic editor file, draw the schematics as shown
in Figure 2. Save the file as Bintohex in C: Makmal Digital. Please
ensure the project name is same with the file name by clicking Set
the project to current file in File menu.
2. At the 4count symbol, right click to get Edit Port/Parameters
menu. At the Name Box, get QA and set ALL in the Inversion Box.
Repeat for QB-QD.
3. At the LPM counter symbol, right click to get Edit
Port/Parameters menu and set all the pins to UNUSED in the Status
box except pin clock and q[LPM_WIDTH1..0]. After that, at the
Parameter box, set the LPM_DIRECTION to UP and LPM_WIDTH to 32 at
the Parameter Value Box.
4. Draw a wire at CLK pin in 4-Count symbol, right click and get
into Edit Node/Bus Name. Type Q24 for it. Repeat the step for all
the buses and nodes.
5. Insert the LED symbol by double click the gdf file to get
into ENTER SYMBOL from Symbol Files menu.
6. Save and Compile the file and make sure all the errors (if
any) are corrected.
DETERMINED DEVICE TYPE AND PIN LOCATION
1. Click at the Assign => Device display menu. Get the
MAX7000s device at Device Family. Under the Device list, get
EPM7128SLC84-6 device. Click OK.
2. Click Assign Pin/Location/Chip display menu. Key in the nodes
name under NODE NAME and pin locations under Chip Resources-Pin.
Click ADD and repeat for all the pin in Table 3. Please refer to
the attachment on the Pin Configurations of EPM7128SLC84-6.
-
4 Last updated on 23rd January 2014
Table 3 Node Name Pin Locations Node Name Pin Locations
CLK I0 I1 I2 I3
CLK pins I/O pin I/O pin I/O pin I/O pin
O0 O1 O2 O3 O4 O5 O6
LED 7 segment pin LED 7 segment pin LED 7 segment pin LED 7
segment pin LED 7 segment pin LED 7 segment pin LED 7 segment
pin
3. Save and compile the file again. After the file is compiled,
run the simulation operation.
4. Open the Waveform Editor file at the menu of MAX Plus II and
get nodes at the Node =>Enter Node from SNF menu. Click all and
choose CLK, [LPM_Counter:2]diffs0.Q-[ LPM_Counter:2]diffs3.Q. Right
click at the CLK and OVERWRITECLOCK. Click OK.
5. Save the file by using the name given. Simulate the signal by
using the simulator available at the MAX PLUS II menu. Check the
output.
6. Input the graphic into the EPM7128SLC84-6 device and program
into ALTERA board.
7. Connect the wires from the I/O pins (as per your define) to
the LED (P7) 8. Turn on the power supply and observe the LED D1-D4
and the 7segment LED
Display 9. What is your conclusion from the observation?
EXERCISE:
Students are required to do one of the following exercises: 1.
By using the JK flip-flops, design a synchronous counter that will
count from 0-15 by
using the Graphic Editor to substitute the 4 count device at the
bintohex.gdf graphic file.
2. By using the JK flip-flops, design a 4 -bit synchronous
counter that will count from 0-8 and back to 0 (MOD9) by using the
Graphic Editor to substitute the 4 count device at the bintohex.gdf
graphic file.
3. By using the JK flip-flops, design a 4 -bit synchronous
counter that will count from 0-11 and back to 0 (MOD 12) by using
the Graphic Editor to substitute the 4 count device at the
bintohex.gdf graphic file.
4. By using the JK flip-flops, design a 4 -bit synchronous
counter that will count from 0-13 and back to 0 (MOD 14) by using
the Graphic Editor to substitute the 4 count device at the
bintohex.gdf graphic file.
-
5 Last updated on 23rd January 2014
Figure 2
END OF EXPERIMENT
-
6 Last updated on 23rd January 2014
ATTACHMENT:
EPM7128S PROTOTYPING HEADERS PIN ASSIGNMENTS
The EPM7128S device is located in an 84-pin plastic J-lead chip
carrier (PLCC) package. There are a total of 21 pins on each side
of this 84-pin PLCC package, which are connected to one of the
22-pin, dual-row 0.1-inch female headers. Since there are only 21
pins on each side of the device, there is an unassigned pin on each
side of the connector. The pin numbers for the EPM7128S device are
shown as follows:
MAX_DIGIT DISPLAYS PIN ASSIGNMENTS
The dual-digit seven-segment display is pre-wired directly to
some of the I/O pins of EPM7128S device. The LED segments of the
display are all active LOW, illuminating when driven by a logic 0.
The segments of the display are named a, b, c, d, e, f, and g, as
shown in the diagram below. The pin assignments are also given in
the table below.
-
7 Last updated on 23rd January 2014
EXAMPLE OF CONNECTIONS:
TEST 1:
