Replicate Computerphile example

[isidroas]

What arguments I need to pass to replicate the example shown in this video https://youtu.be/Ks1pw1X22y4?si=4bk5MuF5VXmgIhqL&t=109 ?

capture:

[Nikeshbajaj]

As video says, it is a 4-bit LFSR with tabs (or feedback polynomial ) as [4,3] (feeback from 4th and 3rd bit) with initial state as 1001, here is a code that generate exactly the same output as in video:

import pylfsr
from pylfsr import LFSR

state = [1,0,0,1]
fpoly = [4,3]
L = LFSR(initstate=state,fpoly=fpoly,counter_start_zero=False)
print('count \t state \t\t\toutbit \t seq')
print('-'*50)
for _ in range(16):
    print(L.count,L.state,'',L.outbit,L.seq,sep='\t')
    L.next()
print('-'*50)
print('Output: ',L.seq)

You could also visualise the same LFSR as

L.Viz()

Note that feeback-bit 1 in above figure is Not the feedback computed from current state shown in figure (1100) but from the previuse state (1001).

[isidroas]

Thanks for the extended response!

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-- Isidro Arias