M. Stokroos
4 years ago
parent
4ee18c83aa
commit
1f3d63ea1c
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#!/usr/bin/env python2 |
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|
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# nog geen 3 omdat serial er nog niet bij zit. (nog steeds?) |
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|
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# To control Nexus robot car |
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# Via /dev/ttyUSB? |
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# |
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|
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import sys, os, serial, time, traceback |
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from struct import pack, unpack |
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import numpy as np |
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import re |
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|
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def key_description(character): |
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"""generate a readable description for a key""" |
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ascii_code = ord(character) |
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if ascii_code < 32: |
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return 'Ctrl+%c' % (ord('@') + ascii_code) |
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else: |
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return repr(character) |
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|
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# voorlopig alleen posix |
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if os.name == 'posixnee': |
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import termios, sys, os |
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class Console: |
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def __init__(self): |
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self.fd = sys.stdin.fileno() |
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|
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def setup(self): |
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self.old = termios.tcgetattr(self.fd) |
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new = termios.tcgetattr(self.fd) |
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# new[3] = new[3] & ~termios.ICANON & ~termios.ECHO & ~termios.ISIG |
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new[3] = new[3] & ~termios.ICANON # & ~termios.ISIG |
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new[6][termios.VMIN] = 1 |
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new[6][termios.VTIME] = 0 |
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termios.tcsetattr(self.fd, termios.TCSANOW, new) |
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|
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# Uiteindelijk willen we meer tegelijk lezen.. |
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# zeker als er grotere hoeveelheden data verstuurd worden door het target |
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def getkey(self): |
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c = os.read(self.fd, 1) |
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return c |
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|
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def cleanup(self): |
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termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.old) |
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console = Console() |
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|
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def cleanup_console(): |
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console.cleanup() |
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console.setup() |
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sys.exitfunc = cleanup_console #terminal modes have to be restored on exit... |
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#else: |
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# raise NotImplementedError( "Sorry no implementation for your platform (%s) available." % sys.platform) |
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CONVERT_CRLF = 2 |
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CONVERT_CR = 1 |
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CONVERT_LF = 0 |
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NEWLINE_CONVERISON_MAP = ('\n', '\r', '\r\n') |
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LF_MODES = ('LF', 'CR', 'CR/LF') |
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|
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REPR_MODES = ('raw', 'some control', 'all control', 'hex') |
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|
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class CarControl: |
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def __init__(self, port, baudrate, parity, rtscts, xonxoff, echo=False, convert_outgoing=CONVERT_CRLF, repr_mode=0): |
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self.serial = serial.Serial(port, baudrate, parity=parity, rtscts=rtscts, xonxoff=xonxoff, timeout = 1) |
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self.echo = echo |
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self.repr_mode = repr_mode |
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self.convert_outgoing = convert_outgoing |
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self.newline = NEWLINE_CONVERISON_MAP[self.convert_outgoing] |
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self.dtr_state = True |
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self.rts_state = True |
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self.break_state = False |
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|
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# Het lijkt er op of er na een power up van de Nexus twee characters (waarde 0) gezonden worden. FTDI chip? |
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# De writer pas wat laten doen als we daar geen last meer van hebben. |
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tmp = self.serial.read(1) |
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#print 'pretmp', len(tmp) |
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#if len(tmp) > 0: |
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# print ord(tmp[0]) |
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time.sleep(1) |
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tmp = self.serial.read(1) |
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#print 'prettmp', len(tmp) |
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#if len(tmp) > 0: |
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# print ord(tmp[0]) |
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|
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def stop(self): |
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print 'Waar is de stop?' |
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self.serial.close() |
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def getinfopacket(self): |
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try: |
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d = self.serial.read(24) |
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print len(d) #, ord(d[0]) |
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if ord(d[0]) <> 2 or ord(d[23]) <> 3: # STX and ETX |
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print 'Packet framing error!' |
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else: |
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print 'New info packet received.' |
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if ord(d[1]) == 1: # scope data packet (try that first) |
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status_control = ord(d[3]); |
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error_code = ord(d[4]); |
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status_car = ord(d[5]); |
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#(sensor,) = unpack('h', d[10:12]); |
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(speed,) = unpack('h', d[6:8]); |
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(debtime,) = unpack('h', d[10:12]); |
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# we gebruiken dit in de write thread en bij autoreply. |
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# evt. korte lock bij uitpakken data |
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waitreq = 1 |
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else: |
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print 'Packet type %x received, not implemented.' % d[1] |
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print 'Info packet received with error code %x %x %d and %d' % (error_code, status_car, speed, debtime) |
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except: |
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print 'Wanneer hier?' |
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traceback.print_exc(file=sys.stdout) |
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""" |
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Packets are 8 bytes. |
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{ stx, command, par's ..., etx } |
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parameters dependant upon the command |
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Nexus robot functions of type void(*function[11])(unsigned int speedMMPS) : |
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{goAhead, turnLeft, turnRight, rotateRight, rotateLeft, allStop, backOff, upperLeft, lowerLeft, upperRight, lowerRight}; |
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{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 } |
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this wil go in command. |
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Parameter speedMMPS in par |
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-700 < speedMMPS < 700 |
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speedMMPS = 200 komt overeen met 0.21 m/sec |
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maximale snelheid 0.735 m/sec |
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van m/s naar speedMMPS : maal 952 |
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Other commands: |
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12: setWheelspeedcommand (set speed of 4 wheels) |
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13: set speedMMPS on Nexus |
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20: ask info packet |
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a 24 byte packet will be received |
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21: autoshutdown off (default) |
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22: autoshutdown on |
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23: autoreply off (default) |
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24: autoreply on. reply with a infopacket |
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25: start standalone? |
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26: stop standalone |
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27: keep alive |
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28: repeat mode info packets off (default) |
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29: repeat mode info packete on |
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""" |
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def sendpacket(self, command, par): |
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outpkt = bytearray(16) |
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outpkt[0] = 2 # STX |
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outpkt[1] = command |
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outpkt[2:4] = pack('h', par) |
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outpkt[15] = 3 # ETX |
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self.serial.write(outpkt) # send packet |
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print 'sendpacket', outpkt[0], outpkt[1], outpkt[2], outpkt[3], outpkt[4], outpkt[5], outpkt[6], ' ... ', outpkt[15] |
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def sendwheelscommand(self, frontleft, backleft, frontright, backright): |
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outpkt = bytearray(16) |
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outpkt[0] = 2 # STX |
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outpkt[1] = 12 # setwheels command |
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outpkt[2:4] = pack('h', frontleft) |
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outpkt[4:6] = pack('h', backleft) |
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outpkt[6:8] = pack('h', frontright) |
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outpkt[8:10] = pack('h', backright) |
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outpkt[15] = 3 # ETX |
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self.serial.write(outpkt) # send packet |
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#print 'outpkt: ', unpack('h', outpkt[2:4]), unpack('h', outpkt[4:6]), unpack('h', outpkt[6:8]), unpack('h',outpkt[8:10]) |
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# def setspeed(self, lin,rot): |
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# # lineaire (m/sec) and rotatie (rad/sec) snelheid |
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# # convert to nexus (calibrated with nexus1) |
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# speed = lin * 1024 |
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# rot = rot * 300 |
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# self.sendwheelscommand(speed -rot, speed - rot, speed + rot , speed + rot) |
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def setspeed(self, linx, liny, rot): |
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# lineaire x and y (m/sec) and rotatie (rad/sec) snelheid |
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# convert to nexus (calibrated with nexus1) |
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speedx = linx * -1024 |
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speedy = liny * -1024 |
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rot = rot * 300 |
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self.sendwheelscommand(speedx -speedy -rot, speedx +speedy -rot, speedx -speedy +rot, speedx +speedy +rot) |
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@ -0,0 +1,220 @@ |
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#!/usr/bin/env python |
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""" |
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Nexus controller |
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""" |
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import rospy |
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import socket |
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from math import radians,sin,cos,pi |
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from std_msgs.msg import Float64 |
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from diagnostic_msgs.msg import * |
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from geometry_msgs.msg import Quaternion |
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from geometry_msgs.msg import Twist |
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from nav_msgs.msg import Odometry |
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from tf.broadcaster import TransformBroadcaster |
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import carcomm |
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class NexusController(): |
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def __init__(self, device, name): |
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self.status = "OK" |
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self.level = DiagnosticStatus.OK |
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# self.name = socket.gethostname() |
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self.dirty = False # newly updated position? |
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self.enabled = True # can we take commands? |
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self.last_cmd = rospy.Time.now() |
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self.rate = rospy.get_param("~nexus/rate", 50.0) |
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self.timeout = rospy.get_param('~nexus/timeout',1.0) |
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self.t_delta = rospy.Duration(1.0/self.rate) |
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self.t_next = rospy.Time.now() + self.t_delta |
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self.fake = rospy.get_param("~sim", False) |
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port = rospy.get_param("~port", "/dev/ttyUSB0") |
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# parameters? |
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# self.base_frame_id = rospy.get_param('~controllers/'+name+'/base_frame_id', ''+self.name+'/base_footprint') |
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self.base_frame_id = rospy.get_param('~controllers/'+name+'/base_frame_id', name+'base_footprint') |
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self.odom_frame_id = rospy.get_param('~controllers/'+name+'/odom_frame_id', 'odom') |
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self.x = 0.0 # position in xy plane |
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self.y = 0.0 |
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self.th = 0 # orientation (theta) |
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self.dx = 0 # x-speed in meter/sec |
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self.dy = 0 # y-speed in meter/sec |
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self.dr = 0 # rotation in radians/sec |
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self.dx_last = 0 # previous x-speed |
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self.dy_last = 0 # previous y-speed |
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self.dr_last = 0 # previous rotation |
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self.then = rospy.Time.now() # time for determining dx/dy |
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# ROS interfaces |
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rospy.Subscriber("cmd_vel", Twist, self.cmdVelCb) |
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self.odomPub = rospy.Publisher("odom", Odometry, queue_size=5) |
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self.odomBroadcaster = TransformBroadcaster() |
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rospy.loginfo("Started Controller ("+name+")") |
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# connect to the nexus robot |
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if not self.fake: |
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# connect to Nexus |
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baudrate = 28800; parity = 'N'; rtscts = False; xonxoff = False; echo = False |
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convert_outgoing = carcomm.CONVERT_CRLF; repr_mode = 0 |
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self.carcon = carcomm.CarControl(port, baudrate, parity, rtscts, xonxoff, echo, convert_outgoing, repr_mode ) |
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# to be sure that the car is ready |
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rospy.sleep(2.0) |
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rospy.loginfo("Started Nexus connection on port " + port + ".") |
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self.carcon.sendpacket(20,0) |
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self.carcon.getinfopacket() |
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else: |
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rospy.loginfo("Nexus being simulated.") |
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def startup(self): |
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print "startup called" |
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def shutdown(self): |
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# close connection with the nexus |
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if not self.fake: |
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console.cleanup_console() |
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carcon.stop() |
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print "shutdown called" |
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def cmdVelCb(self,req): |
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""" Handle movement requests. """ |
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self.last_cmd = rospy.Time.now() |
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if self.fake: |
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self.dx = req.linear.x # m/s |
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self.dy = req.linear.y # m/s |
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self.dr = req.angular.z # rad/s |
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else: |
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# same as fake |
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self.dx = req.linear.x # m/s |
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self.dy = req.linear.y # m/s |
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self.dr = req.angular.z # rad/s |
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def getDiagnostics(self): |
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""" Get a diagnostics status. """ |
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msg = DiagnosticStatus() |
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msg.name = self.name |
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return msg |
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def update(self): |
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""" Do step in nexus controller. """ |
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now = rospy.Time.now() |
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if now > self.t_next: |
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elapsed = now - self.then |
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self.then = now |
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elapsed = elapsed.to_sec() |
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if self.fake: |
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self.x += cos(self.th)*self.dx*elapsed - sin(self.th)*self.dy*elapsed |
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self.y += sin(self.th)*self.dx*elapsed + cos(self.th)*self.dy*elapsed |
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self.th += self.dr*elapsed |
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else: |
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# we use read reackoning for the moment |
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self.x += cos(self.th)*self.dx*elapsed - sin(self.th)*self.dy*elapsed |
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self.y += sin(self.th)*self.dx*elapsed + cos(self.th)*self.dy*elapsed |
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self.th += self.dr*elapsed |
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# publish or perish |
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quaternion = Quaternion() |
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quaternion.x = 0.0 |
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quaternion.y = 0.0 |
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quaternion.z = sin(self.th/2) |
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quaternion.w = cos(self.th/2) |
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self.odomBroadcaster.sendTransform( |
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(self.x, self.y, 0), |
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(quaternion.x, quaternion.y, quaternion.z, quaternion.w), |
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rospy.Time.now(), |
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self.base_frame_id, |
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self.odom_frame_id |
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) |
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odom = Odometry() |
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odom.header.stamp = now |
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odom.header.frame_id = self.odom_frame_id |
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odom.pose.pose.position.x = self.x |
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odom.pose.pose.position.y = self.y |
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odom.pose.pose.position.z = 0 |
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odom.pose.pose.orientation = quaternion |
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odom.child_frame_id = self.base_frame_id |
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odom.twist.twist.linear.x = self.dx |
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odom.twist.twist.linear.y = self.dy |
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odom.twist.twist.angular.z = self.dr |
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self.odomPub.publish(odom) |
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# stop on timeout. nu niet zinnig, er is toch geen terugkoppeling. |
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# if now > (self.last_cmd + rospy.Duration(self.timeout)): |
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# self.dx = 0; self.dr = 0; |
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# print "timeout reached" |
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# update motors |
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if not self.fake: |
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# only send if it really is different! |
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if self.dx <> self.dx_last or self.dy <> self.dy_last or self.dr <> self.dr_last: |
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# voor of achteruit |
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# self.carcon.setspeed(-self.dx, self.dy, self.dr) |
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self.carcon.setspeed(self.dx, self.dy, self.dr) |
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self.dx_last = self.dx; self.dy_last = self.dy; self.dr_last = self.dr |
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self.t_next = now + self.t_delta |
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def getDiagnostics(self): |
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""" Update status of servos (voltages, temperatures). """ |
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print "diagnostics" |
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""" |
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if self.iter % 5 == 0 and not self.fake: |
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if self.device.use_sync_read: |
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# arbotix/servostik/wifi board sync_read |
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synclist = list() |
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for joint in self.dynamixels: |
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if joint.readable: |
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synclist.append(joint.id) |
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if len(synclist) > 0: |
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val = self.device.syncRead(synclist, P_PRESENT_VOLTAGE, 2) |
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if val: |
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for joint in self.dynamixels: |
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try: |
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i = synclist.index(joint.id)*2 |
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if val[i] < 250: |
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joint.voltage = val[i]/10.0 |
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if val[i+1] < 100: |
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joint.temperature = val[i+1] |
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except: |
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# not a readable servo |
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continue |
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else: |
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# direct connection, or other hardware with no sync_read capability |
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# hack to also use slave_id |
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for joint in self.dynamixels: |
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if joint.readable: |
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val = self.device.read(joint.id, P_PRESENT_VOLTAGE, 2) |
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vals = val |
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if joint.slave_id > 0: |
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vals = self.device.read(joint.slave_id, P_PRESENT_VOLTAGE, 2) |
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try: |
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joint.voltage = val[0] |
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# use maximum |
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if val[1] > vals[1]: |
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joint.temperature = val[1] |
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else: |
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joint.temperature = vals[1] |
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except: |
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continue |
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self.iter += 1 |
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return None |
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""" |
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@ -0,0 +1,92 @@ |
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#!/usr/bin/env python |
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""" |
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diagnostics.py - diagnostic output code |
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Copyright (c) 2011 Vanadium Labs LLC. All right reserved. |
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|
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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* Neither the name of Vanadium Labs LLC nor the names of its |
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contributors may be used to endorse or promote products derived |
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from this software without specific prior written permission. |
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL VANADIUM LABS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
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OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
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OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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""" |
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import rospy |
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from diagnostic_msgs.msg import DiagnosticArray |
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from sensor_msgs.msg import JointState |
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class DiagnosticsPublisher: |
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""" Class to handle publications of joint_states message. """ |
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def __init__(self): |
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self.t_delta = rospy.Duration(1.0/rospy.get_param("~diagnostic_rate", 1.0)) |
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self.t_next = rospy.Time.now() + self.t_delta |
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self.pub = rospy.Publisher('diagnostics', DiagnosticArray, queue_size=5) |
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def update(self, joints, controllers): |
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""" Publish diagnostics. """ |
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now = rospy.Time.now() |
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if now > self.t_next: |
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# create message |
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msg = DiagnosticArray() |
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msg.header.stamp = now |
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for controller in controllers: |
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d = controller.getDiagnostics() |
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if d: |
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msg.status.append(d) |
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for joint in joints: |
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d = joint.getDiagnostics() |
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if d: |
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msg.status.append(d) |
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# publish and update stats |
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self.pub.publish(msg) |
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self.t_next = now + self.t_delta |
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class JointStatePublisher: |
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""" Class to handle publications of joint_states message. """ |
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def __init__(self): |
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# parameters: throttle rate and geometry |
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self.rate = rospy.get_param("~read_rate", 10.0) |
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self.t_delta = rospy.Duration(1.0/self.rate) |
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self.t_next = rospy.Time.now() + self.t_delta |
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# subscriber |
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self.pub = rospy.Publisher('joint_states', JointState, queue_size=5) |
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def update(self, joints, controllers): |
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""" publish joint states. """ |
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if rospy.Time.now() > self.t_next: |
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msg = JointState() |
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msg.header.stamp = rospy.Time.now() |
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msg.name = list() |
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msg.position = list() |
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msg.velocity = list() |
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for joint in joints: |
||||
msg.name.append(joint.name) |
||||
msg.position.append(joint.position) |
||||
msg.velocity.append(joint.velocity) |
||||
for controller in controllers: |
||||
msg.name += controller.joint_names |
||||
msg.position += controller.joint_positions |
||||
msg.velocity += controller.joint_velocities |
||||
self.pub.publish(msg) |
||||
self.t_next = rospy.Time.now() + self.t_delta |
||||
|
||||
@ -0,0 +1,49 @@ |
||||
#!/usr/bin/env python |
||||
|
||||
import sys, time |
||||
import carcomm |
||||
|
||||
if __name__ == "__main__": |
||||
|
||||
try: |
||||
# voorlopig vast |
||||
port = "/dev/ttyUSB0" |
||||
baudrate = 28800 |
||||
parity = 'N' |
||||
rtscts = False |
||||
xonxoff = False |
||||
echo = False |
||||
convert_outgoing = carcomm.CONVERT_CRLF |
||||
repr_mode = 0 |
||||
|
||||
carcon = carcomm.CarControl( |
||||
port, |
||||
baudrate, |
||||
parity, |
||||
rtscts, |
||||
xonxoff, |
||||
echo, |
||||
convert_outgoing, |
||||
repr_mode, |
||||
) |
||||
time.sleep(2) # de nexus robot is niet zo snel.. |
||||
carcon.sendpacket(20,0) |
||||
carcon.getinfopacket() |
||||
|
||||
for x in range(0, 200): |
||||
carcon.setspeed( 2.5, 0.0) |
||||
# carcon.getinfopacket() |
||||
time.sleep(0.05) |
||||
carcon.setspeed( 2.5, 0.0) |
||||
# carcon.getinfopacket() |
||||
time.sleep(0.05) |
||||
carcon.setspeed( 0, 0) |
||||
|
||||
except carcomm.serial.SerialException as e: |
||||
sys.stderr.write("could not open port %r: %s\n" % (port, e)) |
||||
sys.exit(1) |
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@ -0,0 +1,7 @@ |
||||
# Robotic Fish |
||||
|
||||
A CPG-based locomotion control example of a robotic fish, implemented on the Arduino. |
||||
|
||||
Please visit: |
||||
|
||||
[https://github.com/MartinStokroos/RoFish](https://github.com/MartinStokroos/RoFish) |
||||
@ -0,0 +1,7 @@ |
||||
# Adaptive Frequency Oscillator |
||||
|
||||
An Adaptive Frequency Oscillator demo for Arduino. |
||||
|
||||
Please visit: |
||||
|
||||
[https://github.com/MartinStokroos/adaptiveFreqOsc](https://github.com/MartinStokroos/adaptiveFreqOsc) |
||||
Loading…
Reference in new issue