Question

我正在尝试找到设备所连接的正确com端口，然后才能运行其余的Python脚本。

我尝试过使用它：

    import serial.tools.list_ports
    ports = list(serial.tools.list_ports.comports())
    for p in ports:
        print p

而且：

    import wmi
    c = wmi.WMI()
    wql = "Select * From Win32_SerialPort"
    for item in c.query(wql):
        print item

而且：

    def serial_ports():

    if sys.platform.startswith('win'):
        ports = ['COM%s' % (i + 1) for i in range(256)]
        print ports 
    elif sys.platform.startswith('linux') or sys.platform.startswith('cygwin'):
        # this excludes your current terminal "/dev/tty"
        ports = glob.glob('/dev/tty[A-Za-z]*')
    elif sys.platform.startswith('darwin'):
        ports = glob.glob('/dev/tty.*')
    else:
        raise EnvironmentError('Unsupported platform')

    result = []
    for port in ports:
        try:
            s = serial.Serial(port)
            s.close()
            result.append(port)
        except (OSError, serial.SerialException):
            pass
    return result

所有这些方法都是我从其他堆栈交换帖子中找到的方法;但是，对于这两个功能，当我尝试打印COM端口列表时，我得到一个空白列表？任何帮助/见解将非常感谢提前感谢！

Answer 1

像这样：

import serial,os,sys,glob


def serial_ports():

    if sys.platform.startswith('win'):
        ports = ['COM%s' % (i + 1) for i in range(256)]
        print ports 
    elif sys.platform.startswith('linux') or sys.platform.startswith('cygwin'):
        # this excludes your current terminal "/dev/tty"
        ports = glob.glob('/dev/tty[A-Za-z]*')
    elif sys.platform.startswith('darwin'):
        ports = glob.glob('/dev/tty.*')
    else:
        raise EnvironmentError('Unsupported platform')

    result = []
    print ports
    for port in ports:
        try:
            s = serial.Serial(port,9600)
            s.close()
            result.append(port)
        except (OSError, serial.SerialException):
            pass
    return result

print serial_ports()

永远不能在没有速度（时钟）定义的情况下打开任何serial端口。

在linux上：run as root，普通用户无法访问/dev（请勿更改动态创建权限cos name_space。不好主意！）。

使用Python

1 个答案: