44 lines
731 B
Python
44 lines
731 B
Python
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def int2byte(n):
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if n >= 2 ** 8:
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raise Exception('a byte can only contain a number smaller then %s' % (2 ** 8))
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bits = [0] * 8
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for i in range(8):
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j = 7 - i
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c = 2 ** j
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if c <= n:
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n -= c
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bits[i] = 1
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return bits
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def byte2int(byte):
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result = 0
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for i in range(len(byte)):
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j = 7 - i
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c = 2 ** i
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result += c * byte[j]
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return result
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def test(x):
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b = int2byte(x)
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print(x, '\t', b, '\t', byte2int(b))
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def swapMSB2LSB(origin, target, numberOfBits):
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target[len(target) - numberOfBits:] = origin[0:numberOfBits]
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return target
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def extractLSB(byte, numberOfBits):
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newByte = [0] * 8
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newByte[0:numberOfBits] = byte[len(byte) - numberOfBits:]
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return newByte
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