import os
import termios
import serial
import time
import sys

# Description --------------------------------------------------------------------------------------------------------------

# Classes for serial, usb, tcp/ip communications.
# 

# Name:        channels.py
# Author:      W. Hetherington
# Created:     2009/03/18
# Modified:    2009/03/18
# Copyright:   (c)2009
# License:     No restrictions

#---------------------------------------------------------------------------------------------------------------------------

class SerialUSB :
    def __init__(self, t) :
        if t == 0 : t = 0.1
        try:
                self.connect = serial.Serial('/dev/ttyUSB0',115200,rtscts=0,timeout=t)
                print('Open USB serial connection:')
                print '\t',self.connect
        except:
                print('USB error: Perhaps the controller or operator is unplugged.')
                sys.exit(2)
        
    def Write(self, s) :
        self.connect.write(s)

    def ReadLines(self) :
        return self.connect.readlines()

    def ReadLine(self) :
        return self.connect.readline()

    def Read(self, bytes) :
        return self.connect.read(bytes)

#---------------------------------------------------------------------------------------------------------------------------

#  Execute
#if __name__ == '__main__':
    #Test()