123 5-bit Galois LFSR

123 : 5-bit Galois LFSR

How it works

https://en.wikipedia.org/wiki/Linear-feedback_shift_register#Galois_LFSRs

How to test

  1. Set the desired taps using the switches
  2. Assert the reset_taps pin
  3. Deassert reset_taps
  4. Set the desired initial state
  5. Assert reset_lfsr
  6. Deassert reset_lfsr
  7. Look at it go!
    • Values between 0x00-0x0F are output as hex digits.
    • Values between 0x10-0x1F are output as hex digits with a dot.
  8. Did you know there is a secret CPU inside?

IO

# Input Output
0 clock segment a
1 reset_lfsr segment b
2 reset_taps segment c
3 data_in1 segment d
4 data_in2 segment e
5 data_in3 segment f
6 data_in4 segment g
7 data_in5 segment p