Python中枚举串口(包括虚拟端口)的跨平台方法是什么?

问题描述

注意:我使用 Python 2.7 和 pySerial 进行串行通信.

Note: I'm using Python 2.7, and pySerial for serial communications.

我发现这篇文章列出了两种方法:http://www.zaber.com/wiki/Software/Python#Displaying_a_list_of_available_serial_ports

I found this article which lists two ways: http://www.zaber.com/wiki/Software/Python#Displaying_a_list_of_available_serial_ports

此方法适用于 Windows 和 Linux，但有时会错过 Linux 上的虚拟端口:

This method works on Windows and Linux, but sometimes misses virtual ports on Linux:

import serial

def scan():
   # scan for available ports. return a list of tuples (num, name)
   available = []
   for i in range(256):
       try:
           s = serial.Serial(i)
           available.append( (i, s.portstr))
           s.close()
       except serial.SerialException:
           pass
   return available

print "Found ports:"
for n,s in scan(): print "(%d) %s" % (n,s)

而这个仅适用于 Linux，但包含虚拟端口:

And this one that only works on Linux, but includes virtual ports:

import serial, glob

def scan():
   # scan for available ports. return a list of device names.
   return glob.glob('/dev/ttyS*') + glob.glob('/dev/ttyUSB*')

print "Found ports:"
for name in scan(): print name

我想我可以在 Linux 上运行时使用第二种方法(包括虚拟端口的方法)进行平台检测，在运行 Windows 时使用第一种方法，但是 Mac 呢?

I suppose I could do platform detection to use the second method (the one that includes virtual ports) when running on Linux, and the first method when running Windows, but what about Mac?

无论平台如何，我应该如何枚举串行端口(也是虚拟的)?

How should I enumerate serial ports (virtual too) regardless of platform?

编辑

我发现了一些相关的问题:

I found a few pertinent questions:

• MacPython:以编程方式查找所有串行端口
• MacOS:/dev/有什么区别tty.* 和/dev/cu.*?
• 如何查找Linux 上的所有串行设备(ttyS、ttyUSB、..)都无需打开?

推荐答案

这是我一直在使用的.这是我上面发布的方法的混搭.不过，我仍然希望看到更好的解决方案.

This is what I've been using. It's a mashup of the methods I posted above. I'd still like to see better solutions, though.

# A function that tries to list serial ports on most common platforms
def list_serial_ports():
    system_name = platform.system()
    if system_name == "Windows":
        # Scan for available ports.
        available = []
        for i in range(256):
            try:
                s = serial.Serial(i)
                available.append(i)
                s.close()
            except serial.SerialException:
                pass
        return available
    elif system_name == "Darwin":
        # Mac
        return glob.glob('/dev/tty*') + glob.glob('/dev/cu*')
    else:
        # Assume Linux or something else
        return glob.glob('/dev/ttyS*') + glob.glob('/dev/ttyUSB*')

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