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Fixed Validation

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This commit is contained in:
Cort Buffington 2016-09-22 16:19:15 -05:00
parent e4cc3e95f0
commit 2edff30fbb
2 changed files with 17 additions and 13 deletions
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3
bptc19696.py
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@ -49,7 +49,7 @@ def dec_deinterleave_19696(_data):
# Applies BTPC error detection/correction routines (INCOMPLETE)
def dec_error_check_19696(_data):
checked = BitArray(196)
checked = bitarray(196)
# Returns useable LC data - 9 bytes info + 3 bytes RS(12,9) ECC
def dec_get_data_19696(_data):
@ -97,6 +97,7 @@ if __name__ == '__main__':
print('deinterleaved binary data')
print(len(deint_data), 'bits')
print(deint_data)
print(h(deint_data.tobytes()))
print()
print('decoded hex data')

25
hamming.py
View File

@ -120,17 +120,20 @@ if __name__ == '__main__':
# Validation Example
raw_data = '\x44\x4d\x52\x44\x00\x2f\x9b\xe5\x00\x0c\x30\x00\x04\xc2\xc4\xa1\xa1\x99\x48\x6e\x2b\x60\x04\x10\x1f\x84\x2d\xd0\x0d\xf0\x7d\x41\x04\x6d\xff\x57\xd7\x5d\xf5\xde\x30\x15\x2e\x20\x70\xb2\x0f\x80\x3f\x88\xc6\x95\xe2\x00\x00'
raw_data = raw_data[20:53]
# Good
_data = bitarray('0000000000000000000100000011101000000000000000000000110001110011000000100100111110011010110111100101111001011010110101101100010110100110000110000111100111010011101101000010101001110000100101010100')
# Bad
_data = bitarray('0000000000000000000110000011101000000000000000000000110001110011000000100100111110011010110111100101111001011010110101101100010110100110000110000111100111010011101101000010101001110000100101010100')
data = bitarray(endian='big')
data.frombytes('raw_data')
data = data[4:]
rows = (_data[1:16],_data[16:31],_data[31:46],_data[46:61],_data[61:76],_data[76:91],_data[91:106],_data[106:121],_data[121:136])
print(data[0:11], data[11:15])
print(dec_hamming_15113(data[0:15])[0][0:11], dec_hamming_15113(data[0:15])[0][11:15], dec_hamming_15113(data[0:15])[1])
print(enc_hamming_15113(data[0:11]))
for row in rows:
print('original data:', row[0:11], 'original parity:', row[11:15])
hamming_dec = dec_hamming_15113(row[0:15])
code = hamming_dec[0]
error = hamming_dec[1]
print('return data: ', code[0:11], 'return parity: ', code[11:15], 'return error:', error)
print('calculated parity:', enc_hamming_15113(row[0:11]))
print()
print(data[0:9], data[9:13])
print(dec_hamming_1393(data[0:13])[0][0:9], dec_hamming_1393(data[0:13])[0][9:13], dec_hamming_15113(data[0:15])[1])
print(enc_hamming_1393(data[0:9]))