30 lines
601 B
Python
30 lines
601 B
Python
from math import log, floor
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tobin = lambda v: v>0 and tobin(v>>1).lstrip('0')+str(v&1) or '0'
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def calcremainder(v,coeff):
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n = floor(log(coeff,2))
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v = v << n
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r = v
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while (r>>n) > 0:
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m = floor(log(r,2))
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p = coeff<<(m-n)
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r = r ^ p
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return v,r
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def create(b,coeff=0b1011):
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v,r = calcremainder(b,coeff)
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return v+r
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def check(b,coeff=0b1011):
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_,r = calcremainder(b,coeff)
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return r == 0
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a = int("11010011101100",2)
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print( "V:" + tobin( a ) )
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c = create(a)+1
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print("CRC-Data: " + tobin( c ) )
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print("Correct?: " + ( check(c) and "Yes" or "No"))
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