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hamming-gen.py
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hamming-gen.py
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# 16-bit block hamming code generator
# Based off of: https://www.youtube.com/watch?v=X8jsijhllIA
# Example input: 00110001110
def main():
print("Enter a 11-bit chunk")
ipt = input()
if len(ipt) != 11:
print("Invalid input")
return
arr = [[0, 0, 0], [0], [0], []]
fdim = 0
for s in ipt:
arr[fdim].append(int(s))
if len(arr[fdim]) == 4:
fdim += 1
# First parity check
par1 = arr[0][3] + arr[1][1] + arr[1][3] + arr[2][1] + arr[2][3] + arr[3][1] + arr[3][3]
if par1 % 2 == 1:
arr[0][1] = 1
# Second parity check
par2 = arr[0][3] + arr[1][2] + arr[1][3] + arr[2][2] + arr[2][3] + arr[3][2] + arr[3][3]
if par2 % 2 == 1:
arr[0][2] = 1
# Third parity check
par3 = arr[1][1] + arr[1][2] + arr[1][3] + arr[3][0] + arr[3][1] + arr[3][2] + arr[3][3]
if par3 % 2 == 1:
arr[1][0] = 1
# Fourth parity check
par4 = arr[2][1] + arr[2][2] + arr[2][3] + arr[3][0] + arr[3][1] + arr[3][2] + arr[3][3]
if par4 % 2 == 1:
arr[2][0] = 1
# Set the latest/global parity bit
tot = 0
for i1 in arr:
for i2 in i1:
tot += i2
if tot % 2 == 1:
arr[0][0] = 1
for x in arr:
print(x)
if __name__ == '__main__':
main()