client_AppXboxAngle.py

# This program enables to control the sunfounder car with a Xbox 360 USB controller via a Mac.
# Please install the Xbox 360 driver (https://github.com/360Controller/360Controller/releases) first and ensure that the controller is connected to the USB port at the time of booting
# This file replaces the file "client_App.py" of the sunfounder software package.
# Make sure you adapt the host IP adress to your system
# Author: Uwe Sterr
# Date: May 2018
# Version: Draft C
# change log:
# Draft B: 
# Capsulated XboxCode into function "XboxControl"
# Can select either Web interface, Xbox controller or neural network
# needs a line command parameter
# "Web": web interface is used to control car
# "Xbox": Xbox 360 controller is used to control car
# "Neural" Neural network is used to control car
# introduced threshold variables
# Draft C
# Steering proportional now with lever postion

# Limitations

# Neural net not yet implemented
# Add function to gather training data

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from Tkinter import *
from socket import *      # Import necessary modules

ctrl_cmd = ['forward', 'backward', 'left', 'right', 'stop','home']

top = Tk()   # Create a top window
top.title('Sunfounder Raspberry Pi Smart Video Car')

HOST = '192.168.178.67'    # Server(Raspberry Pi) IP address
PORT = 21567
BUFSIZ = 1024             # buffer size
ADDR = (HOST, PORT)

tcpCliSock = socket(AF_INET, SOCK_STREAM)   # Create a socket
tcpCliSock.connect(ADDR)                    # Connect with the server

# =============================================================================
# The function is to send the command forward to the server, so as to make the 
# car move forward.
# ============================================================================= 
def forward_fun(event):
	print 'forward'
	tcpCliSock.send('forward')

def backward_fun(event):
	print 'backward'
	tcpCliSock.send('backward')

def left_fun(event):
	print 'left'
	tcpCliSock.send('left')

def right_fun(event):
	print 'right'
	tcpCliSock.send('right')

def stop_fun(event):
	print 'stop'
	tcpCliSock.send('stop')

def home_fun(event):
	print 'home'
	tcpCliSock.send('home')

def x_increase(event):
	print 'x+'
	tcpCliSock.send('x+')

def x_decrease(event):
	print 'x-'
	tcpCliSock.send('x-')

def y_increase(event):
	print 'y+'
	tcpCliSock.send('y+')

def y_decrease(event):
	print 'y-'
	tcpCliSock.send('y-')

def xy_home(event):
	print 'xy_home'
	tcpCliSock.send('xy_home')

# =============================================================================
# Exit the GUI program and close the network connection between the client 
# and server.
# =============================================================================
def quit_fun(event):
	top.quit()
	tcpCliSock.send('stop')
	tcpCliSock.close()

# =============================================================================
# Create buttons
# =============================================================================
Btn0 = Button(top, width=5, text='Forward')
Btn1 = Button(top, width=5, text='Backward')
Btn2 = Button(top, width=5, text='Left')
Btn3 = Button(top, width=5, text='Right')
Btn4 = Button(top, width=5, text='Quit')
Btn5 = Button(top, width=5, height=2, text='Home')

# =============================================================================
# Buttons layout
# =============================================================================
Btn0.grid(row=0,column=1)
Btn1.grid(row=2,column=1)
Btn2.grid(row=1,column=0)
Btn3.grid(row=1,column=2)
Btn4.grid(row=3,column=2)
Btn5.grid(row=1,column=1)

# =============================================================================
# Bind the buttons with the corresponding callback function.
# =============================================================================
Btn0.bind('<ButtonPress-1>', forward_fun)  # When button0 is pressed down, call the function forward_fun().
Btn1.bind('<ButtonPress-1>', backward_fun)
Btn2.bind('<ButtonPress-1>', left_fun)
Btn3.bind('<ButtonPress-1>', right_fun)
Btn0.bind('<ButtonRelease-1>', stop_fun)   # When button0 is released, call the function stop_fun().
Btn1.bind('<ButtonRelease-1>', stop_fun)
Btn2.bind('<ButtonRelease-1>', stop_fun)
Btn3.bind('<ButtonRelease-1>', stop_fun)
Btn4.bind('<ButtonRelease-1>', quit_fun)
Btn5.bind('<ButtonRelease-1>', home_fun)

# =============================================================================
# Create buttons
# =============================================================================
Btn07 = Button(top, width=5, text='X+', bg='red')
Btn08 = Button(top, width=5, text='X-', bg='red')
Btn09 = Button(top, width=5, text='Y-', bg='red')
Btn10 = Button(top, width=5, text='Y+', bg='red')
Btn11 = Button(top, width=5, height=2, text='HOME', bg='red')

# =============================================================================
# Buttons layout
# =============================================================================
Btn07.grid(row=1,column=5)
Btn08.grid(row=1,column=3)
Btn09.grid(row=2,column=4)
Btn10.grid(row=0,column=4)
Btn11.grid(row=1,column=4)

# =============================================================================
# Bind button events
# =============================================================================
Btn07.bind('<ButtonPress-1>', x_increase)
Btn08.bind('<ButtonPress-1>', x_decrease)
Btn09.bind('<ButtonPress-1>', y_decrease)
Btn10.bind('<ButtonPress-1>', y_increase)
Btn11.bind('<ButtonPress-1>', xy_home)
#Btn07.bind('<ButtonRelease-1>', home_fun)
#Btn08.bind('<ButtonRelease-1>', home_fun)
#Btn09.bind('<ButtonRelease-1>', home_fun)
#Btn10.bind('<ButtonRelease-1>', home_fun)
#Btn11.bind('<ButtonRelease-1>', home_fun)

# =============================================================================
# Bind buttons on the keyboard with the corresponding callback function to 
# control the car remotely with the keyboard.
# =============================================================================
top.bind('<KeyPress-a>', left_fun)   # Press down key 'A' on the keyboard and the car will turn left.
top.bind('<KeyPress-d>', right_fun) 
top.bind('<KeyPress-s>', backward_fun)
top.bind('<KeyPress-w>', forward_fun)
top.bind('<KeyPress-h>', home_fun)
top.bind('<KeyRelease-a>', home_fun) # Release key 'A' and the car will turn back.
top.bind('<KeyRelease-d>', home_fun)
top.bind('<KeyRelease-s>', stop_fun)
top.bind('<KeyRelease-w>', stop_fun)

#spd = 52

def changeSpeed(ev=None):
	tmp = 'speed'
	global spd
	spd = speed.get()
	data = tmp + str(spd)  # Change the integers into strings and combine them with the string 'speed'. 
	print 'sendData = %s' % data
	tcpCliSock.send(data)  # Send the speed data to the server(Raspberry Pi)

label = Label(top, text='Speed:', fg='red')  # Create a label
label.grid(row=6, column=0)                  # Label layout

speed = Scale(top, from_=0, to=100, orient=HORIZONTAL, command=changeSpeed)  # Create a scale
speed.set(50)
speed.grid(row=6, column=1)

def XboxControl():
     import pygame
     pygame.init()
 
     pygame.joystick.init()
     clock = pygame.time.Clock()
 
     print pygame.joystick.get_count()
     _joystick = pygame.joystick.Joystick(0)
     _joystick.init()
     tmp = 'speed'
     tmp1 = "turn="
     thresThrottleLow = -0.05
     thresThrottleHigh= 0.05
     thresSteerLow = -0.01
     thresSteerHigh= 0.01
     while 1:
		for event in pygame.event.get():
			if event.type == pygame.JOYBUTTONDOWN:
				print("Joystick button pressed.")
				print event
			if event.type == pygame.JOYAXISMOTION:
			#print _joystick.get_axis(0)
			#print event
				if event.axis == 0: # this is the x axis
				    if event.value > thresSteerHigh:
				       #tcpCliSock.send('right')
				       angle = int(100*abs(event.value))
				       data = tmp1 + str(angle)  # Change the integers into strings and combine them with the string 'speed'.
				       print 'sendData = %s' % data
				       tcpCliSock.send(data)  # Send the speed data to the server(Raspberry Pi)
				    if event.value < thresSteerLow:
				       #tcpCliSock.send('left') 
				       angle = int(-100*abs(event.value))
				       data = tmp1 + str(angle)  # Change the integers into strings and combine them with the string 'speed'.
				       print 'sendData = %s' % data
				       tcpCliSock.send(data)  # Send the speed data to the server(Raspberry Pi)
				    #if (event.value < thresSteerHigh) & (event.value > thresSteerLow):
				       #tcpCliSock.send('home')   				       
				         
				if event.axis == 3: # this is the x axis
				    if event.value < thresThrottleLow:
				       tcpCliSock.send('forward')
				       spd = int(100*abs(event.value))
				       data = tmp + str(spd)  # Change the integers into strings and combine them with the string 'speed'.
				       print 'sendData = %s' % data
				       tcpCliSock.send(data)  # Send the speed data to the server(Raspberry Pi)
 
				    if event.value > thresThrottleHigh:
				       tcpCliSock.send('backward')
				       spd = int(100*abs(event.value))
				       data = tmp + str(spd)  # Change the integers into strings and combine them with the string 'speed'.
				       print 'sendData = %s' % data
				       tcpCliSock.send(data)  # Send the speed data to the server(Raspberry Pi)

				    if (event.value < thresThrottleHigh) & (event.value > thresThrottleLow):
				       tcpCliSock.send('stop')      

def NeuralNet():
    print "not implemented yet"
   # read image in
   # pre process image
   # calc steering angle using neural network
   # send steering angle via wifi

def main():
    if sys.argv[1] == "Web":
	   top.mainloop()

    if sys.argv[1] == "Xbox":
       XboxControl() 
       
    if sys.argv[1] == "Neural":
       NeuralNet() 

if __name__ == '__main__':
	main()