261 Pseudo Random Number Generator
261 : Pseudo Random Number Generator
- Author: International Hellenic University - Department of Information and Electronic Engineering
- Description: This project implements a pseudo-random number generator using Verilog. It generates pseudo-random numbers and outputs them to drive two 7-segment displays.
- GitHub repository
- Clock: 50000000 Hz
How it works
The pseudo-random number generator is based on LFSR. It takes three inputs:
clk: Clock input.en: Enable signal.rst_n: Active-low reset signal.
The generator produces 8-bit pseudo-random numbers, which can be used to control two 7-segment displays. As source of pseudo-randomnes used 2 LFSRs. One that works with 8 bit and one with 16 bit. The circuit dont have input data, just 1 clock and 1 enable pin. The output will be a 7 segment display, so 14 output pins. The 16 bit LFSR produce the input of a 16-to-8 multiplexer and the 8 bit LFSR produce the selection bits of 16-to-8 multiplexer. The 16-to-8 multiplexer is implemented by 8 2-to-1 multiplexers. The final stage is convert the data readable by 2 7 segment displays.
LFSR16 ------ bit 0 ------> | 16-to-8 mux | ------ bit 1 ------> | |----------> output 0 . | |----------> output 1 . | | . . |inputs | . ------ bit 15 ------> | | . | | | |----------> output 7 LFSR8 ------ bit 0 ------> |select | ------ bit 1 ------> | | . | | . | | . | | ------ bit 7 ------> | |
How to test
To test the pseudo-random number generator, you can follow these steps:
- Connect the
clk,en, andrst_nsignals appropriately. - Connect 2 7 segments display as output.
- Apply clock pulses at 50MHz and high logic control signals at
ento generate and display pseudo-random numbers.
External hardware
7 segment display
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | clk | segment0 a | segment1 b |
| 1 | en | segment0 b | segment1 c |
| 2 | rst_n | segment0 c | segment1 d |
| 3 | segment0 d | segment1 e | |
| 4 | segment0 e | segment1 f | |
| 5 | segment0 f | segment1 g | |
| 6 | segment0 g | ||
| 7 | segment1 a |