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python-3.x - 将有符号数转换为 little endian 格式的 16 位二进制值

问题描述

我需要将包含有符号和无符号整数的数组转换为小端格式的二进制值。这是我尝试过的。我无法将大端转换为小端。

data = [-6, -24, -37, -45, -52, -54, -54, -51, -48, -47]
for i in data:
   if (i<0):
       values.append(bin(i & 0xffff).reverse())
   else:
       values.append(bin(i).reverse())

我得到的输出是

['0b1111111111111010', '0b1111111111101000', '0b1111111111011011', '0b1111111111010011', '0b1111111111001100', '0b1111111111001010', '0b1111111111001010', '0b1111111111001101', '0b1111111111010000', '0b1111111111010001']

更新

检查转换是否正确。我尝试将生成的二进制转换回整数。它给了我错误的结果。

print("Input {}".format(data))
#integer to little endian binary
values = [x.to_bytes(2, byteorder='big', signed=True) for x in data]
reinterpreted = [int.from_bytes(x, byteorder='little', signed=True) for x in values]
for i in reinterpreted:
    if (i<0):
        final.append(bin(i & 0xffff))
    else:
        final.append(bin(i))
print("Binary {}".format(final))

#little endian binary to integer
for i in final:
    integerValue.append(int(i, base=2))
print("Recalculate input {}".format(integerValue))

Input [-6, -24, -37, -45, -52, -54, -54, -51, -48, -47]
Binary ['0b1111101011111111', '0b1110100011111111', 
'0b1101101111111111', '0b1101001111111111', '0b1100110011111111', 
'0b1100101011111111', '0b1100101011111111', '0b1100110111111111', 
'0b1101000011111111', '0b1101000111111111']
Recalculate input [64255, 59647, 56319, 54271, 52479, 51967, 51967, 
52735, 53503, 53759]

标签： python-3.xbinary

解决方案

这完美地工作。将整数数组转换为 16 位有符号数组，反之亦然并比较结果。

#integer to little endian binary
values = [x.to_bytes(2, byteorder='big', signed=True) for x in ECG_data]
reintermediate = [int.from_bytes(x, byteorder='little', signed=True) for x in values]
for i in reintermediate:
    if (i<0):
        final.append(bin(i & 0xffff)[2:])
    else:
        final.append(bin(i)[2:])

#little endian binary to integer
data = [(int(i, base=2).to_bytes(2, "little")) for i in final]
reinterpreted = [int.from_bytes(x, byteorder='big', signed=True) for x in data]

if ((reinterpreted == ECG_data) == True):
    print("Interpretation is Proper")
else:
    print("Interpretation is wrong")

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