#!/usr/bin/env python  
# -*- coding: utf-8 -*- 
import os  
import sys 
import tty, termios 
import time   
 
if __name__ == '__main__': 
  print "Reading form keybord" 
  print """  i 
j k l 
  m""" 
  print 'press Q to quit' 
  while True: 
    fd=sys.stdin.fileno() 
    old_settings=termios.tcgetattr(fd) 
    #old_settings[3]= old_settings[3] & ~termios.ICANON & ~termios.ECHO  
    try: 
      tty.setraw(fd) 
      ch=sys.stdin.read(1) 
    finally: 
      termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)  
      #print 'error' 
    if ch=='i': 
      print 'move forward' 
    elif ch=='m': 
      print 'move back' 
    elif ch=='j': 
      print "turn left!" 
    elif ch=='l': 
      print "turn right!" 
    elif ch=='u': 
      print "turn right!" 
    elif ch=='o': 
      print "turn right!" 
    elif ch=='k': 
      print "stop motor!" 
    elif ch=='q': 
      print "shutdown!" 
      break 
    elif ord(ch)==0x3: 
      #这个是ctrl c 
      print "shutdown" 
      break 
    print "Reading form keybord" 
    print """  i 
j k l 
  m""" 
    print 'press Q or ctrl+c to quit' 
    #rate.sleep()