#! /usr/bin/env python
"""\
Scan for serial ports.

Part of pySerial (http://pyserial.sf.net)
(C) 2002-2003 <cliechti@gmx.net>

The scan function of this module tries to open each port number
from 0 to 255 and it builds a list of those ports where this was
successful.
"""

import serial
import glob
import sys

def win_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()   # explicit close 'cause of delayed GC in java
        except serial.SerialException:
            pass
    return available

def get():
    ports = []
    if sys.platform.startswith('win'):
        for n,s in win_scan():
            ports.append(s)
    else:
        for name in lin_scan():
            ports.append(name)
    return ports


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