1. 3-bit calculator using 7-segment LEDs
7-Segment Controller
3-bit calculator using 7-segment LEDs
Inhwan Lee, Youngtaek Oh, Daehyun Ahn
(inhwan301, koyt1126,
April 3, 2017
1/9

2. Decimal to Binary Decoding
Outline
Decimal to Binary Decoding
Input :
Two operand(0~7)
Output :
7-segment
in double figures
3-bit Adder

3. Input
Using Bus Switch
Mapping each switch to one digit (0~7)
2/9

4. Decoding input to Binary
Input using 8 switches representing 0~7
Need to decode inputs to binary to use 3-bit adder
Input
Output
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1 1
3/9

5. ‘parameter’ command in Verilog
Method to define constant in module
Can’t use as a variable
Make readability higher
4/9

6. 3-bit calculator
Use Codes from Week4’s Lab
5/9

7. Output 7-Segment LED Array
Cannot use multiple 7-segments at once because constraint of the number of I/O pins
Input each digit segment from a to g
Set seg_com for each digit
Express the full number by afterimage effect
6/9

8. Output
Source Code bringing up multiple letters on 7-Segments (output : bA)
7/9

9. I/O Pin Planning Switch1 Xilinx Switch2 1 W15 AD12 2 AA13 AC11 3 AF134
AD15
W13 5
AE15
Y13 6
AA15
AE12 7
AB15
AF12 8
Y16
AB14
8/9

10. I/O Pin Planning Seg_out Xilinx Seg_com A AF5 #1 AD2 B AE5 #2 W2 C AB6#3 W1 D
AA6 #4
AB4 E
K26 #5
AB3 F
K25 #6 W6 G
AC2 #7 W5 DP
AC1 #8 W4
Clk
A13
9/9