lsfr.py

import numpy as np
from pylfsr import LFSR

L = LFSR()

state = [1,1,1,1,1,0,0,0,0,0]
fpoly = [10,8,5,4]
L = LFSR(fpoly=fpoly,initstate =state, verbose=False)
L.info()
period=1023
for i in range(1,1024):
    L.next()
    if np.array_equal(L.state,state):
        print("found at:",i)
        period=min(period,i)
    if i<=20:
        print("State",i,L.state)
print("total period",period)