在Python中接收16位整数 [英] Receiving 16-bit integers in Python

问题描述

我正在通过串口从一块硬件读取16位整数。

I'm reading 16-bit integers from a piece of hardware over the serial port.

使用Python，我怎样才能使LSB和MSB正确，以及让Python明白它是一个16位有符号整数，我正在摆弄，而不只是两个字节的数据？

Using Python, how can I get the LSB and MSB right, and make Python understand that it is a 16 bit signed integer I'm fiddling with, and not just two bytes of data?

推荐答案

尝试使用 struct 模块：

import struct
# read 2 bytes from hardware as a string
s = hardware.readbytes(2)
# h means signed short
# < means "little-endian, standard size (16 bit)"
# > means "big-endian, standard size (16 bit)"
value = struct.unpack("<h", s) # hardware returns little-endian
value = struct.unpack(">h", s) # hardware returns big-endian

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