urcontrol/urosc.py

import argparse 
from pythonosc import dispatcher 
from pythonosc import osc_server 
from pythonosc import udp_client 
import threading 
import time
import math
import numpy as np
import curses

from rtde_receive import RTDEReceiveInterface as RTDEReceive





clients = []
rtde_r=None
server=None



def toRad(d):
    return d/360*2*math.pi

def toDeg(r):
    return r*360/2/math.pi


def mapFromTo(x,a,b,c,d):
   y=(x-a)/(b-a)*(d-c)+c
   return y

def handle_received_osc(address, *args): 
    print(f"Received OSC message on {address}") 
    for arg in args: 
        print(f"Data: {arg}") 
 
def setupOSC(ip, port): 
    # Set up the dispatcher for the server 
    disp = dispatcher.Dispatcher() 
    disp.map("/filter", handle_received_osc)  # You can change '/filter' to any address pattern you expect 
 
    # Set up OSC server 
    server = osc_server.ThreadingOSCUDPServer((ip, port), disp) 
    print(f"Serving on {server.server_address}") 
    server_thread = threading.Thread(target=server.serve_forever) 
    server_thread.start() 
 
    return server,server_thread

def setupClients(clientips,port):
    clients = []
    
    # Set up OSC client 
    for cip in clientips:
        print("connecting to "+str(cip))
        client = udp_client.SimpleUDPClient(cip, port) 
        clients.append(client)
     
    return clients


def setupRTDE(robotip,frequency):
    dt = 1 / frequency
    rtde_r = RTDEReceive(robotip, frequency)

    return rtde_r
 
 
joint_min=[toRad(-360),toRad(-360),toRad(-360),toRad(-360),toRad(-360),toRad(0)]
joint_max=[toRad(360),toRad(360),toRad(360),toRad(360),toRad(360),toRad(360)]




def main(stdscr):
    """Main entry point allowing external calls

    Args:
      args ([str]): command line parameter list
    """

    # Clear and refresh the screen for a blank canvas
    stdscr.clear()
    stdscr.refresh()

    curses.cbreak()
    stdscr.keypad(1)
    stdscr.nodelay(1)

    
    # Start colors in curses
    curses.start_color()
    curses.init_pair(1, curses.COLOR_CYAN, curses.COLOR_BLACK)
    curses.init_pair(2, curses.COLOR_RED, curses.COLOR_BLACK)
    curses.init_pair(3, curses.COLOR_BLACK, curses.COLOR_WHITE)

    
    height, width = stdscr.getmaxyx()

    scrfrequency=30
    
    dt = 1 / scrfrequency
    
    
    
    key = ''
    loopcounter = 0
    loopdurations = np.zeros(100)
    loopdurations_pos=0
    
    try:
        while key != ord('q'):
            key = stdscr.getch()
            stdscr.clear()
            start = time.time()
            
            q=[0,0,0,0,0,0]
            if rtde_r is not None:
                q=rtde_r.getActualQ()
            else:
                _offsets=[12.2,5.3,0,6,12.4,612.91]
                _factors=[1.2,1.14,1.214,0.9921,1,1.092]
                
                for _i,_offset in enumerate(_offsets):
                    q[_i]=(math.sin(time.time()*_factors[_i]+_offset)/2.0+0.5)*(joint_max[_i]-joint_min[_i])+joint_min[_i]


            for c in clients:
            
                
                for jointi in range(6):
                    c.send_message("/j"+str(jointi), toDeg(q[jointi]))

            stdscr.addstr(0, 0, "loopcounter="+str(loopcounter), curses.color_pair(1))
            stdscr.addstr(1, 0, "loop usage="+str(round(np.max(loopdurations)/dt,3)), curses.color_pair(1))
            


            startbarsx=10
            endbarsx=width-1
            for j in range(6):
                posx=mapFromTo(q[j],joint_min[j],joint_max[j],startbarsx,endbarsx) #scale to screen width
                for px in range(width):
                    diff=abs(posx-px)
                    poschar=''
                    
                    if diff<3:
                        poschar='-'
                    if diff<0.5:
                        poschar='|'

                    if px==startbarsx:
                        poschar="["
                    if px==endbarsx:
                        poschar="]"
                        
                    if (len(poschar)>0):
                        stdscr.addstr(2+j, px, poschar, curses.color_pair(1))
                valuetext=str(round(toDeg(q[j]),2))
                if q[j]>=0: #has no negative sign
                    valuetext=" "+valuetext
                stdscr.addstr(2+j, 0, valuetext, curses.color_pair(1))

                
            # Refresh the screen
            stdscr.refresh()


            end = time.time()
            loopduration = end - start
            loopdurations[loopdurations_pos]=loopduration
            loopdurations_pos+=1
            loopdurations_pos%=np.size(loopdurations)

            if loopduration < dt:
                time.sleep(dt - loopduration)
            loopcounter += 1

    except KeyboardInterrupt:
        
        print("\nData recording stopped.")
        curses.endwin()
        

if __name__ == "__main__": 
    parser = argparse.ArgumentParser() 
    parser.add_argument("--listenip",
        default="127.0.0.1", help="The ip to listen on")
    parser.add_argument("--listenport",
        type=int, default=5005, help="The port to listen on")

    parser.add_argument("--clientip",
        default="127.0.0.1", help="The ip to connect to")
    parser.add_argument("--port",
        type=int, default=5005, help="The port to connect to")
    

    parser.add_argument("--robotip",
        default="127.0.0.1", help="The ip to connect to")
    
    parser.add_argument("--test", action='store_true', default=False, help="Disable network and robot communication")
    
    
    parser.add_argument(
        "-f",
        "--frequency",
        dest="frequency",
        help="the frequency at which the data is recorded (default is 500Hz)",
        type=float,
        default=500.0,
        metavar="<frequency>")
    args = parser.parse_args()

    clientips=[args.clientip]
 
    
    if args.test is not True:
        server,server_thread=setupOSC(args.listenip, args.listenport) 

        clients=setupClients(clientips,args.port)

        rtde_r=setupRTDE(args.robotip,args.frequency)

    
    curses.wrapper(main)

    if server is not None:
        input("Ended. Press Enter to shutdown")
        server.shutdown() 
        server_thread.join()