def __init__(self):
"""
Builds the library, creates the communication node in ROS and
initializes the hand publisher and subscriber to the default
values of shadowhand_data and sendupdate
"""
self.allJoints = [Joint("THJ1", "smart_motor_th1"),
Joint("THJ2", "smart_motor_th2", -30, 30),
Joint("THJ3", "smart_motor_th3",-15, 15),
Joint("THJ4", "smart_motor_th4",0, 75),
Joint("THJ5", "smart_motor_th5",-60, 60),
Joint("FFJ0", "smart_motor_ff2", 0, 180),
Joint("FFJ3", "smart_motor_ff3"),
Joint("FFJ4", "smart_motor_ff4", -25, 25),
Joint("MFJ0", "smart_motor_mf2", 0, 180),
Joint("MFJ3", "smart_motor_mf3"),
Joint("MFJ4", "smart_motor_mf4", -25, 25),
Joint("RFJ0", "smart_motor_rf2", 0, 180),
Joint("RFJ3", "smart_motor_rf3"),
Joint("RFJ4", "smart_motor_rf4", -25,25),
Joint("LFJ0", "smart_motor_lf2", 0, 180),
Joint("LFJ3", "smart_motor_lf3"),
Joint("LFJ4", "smart_motor_lf4", -25, 25),
Joint("LFJ5", "smart_motor_lf5", 0, 45),
Joint("WRJ1", "smart_motor_wr1", -30, 40),
Joint("WRJ2", "smart_motor_wr2", -30, 10),
]
self.handJoints = []
self.armJoints = [Joint("ShoulderJRotate", "", -45, 60),
Joint("ShoulderJSwing", "", 0, 80),
Joint("ElbowJSwing", "", 0,120),
Joint("ElbowJRotate", "", -80,80)
]
self.lastMsg = joints_data()
self.lastArmMsg = joints_data()
self.cyberglove_pub = 0
self.cyberglove_sub = 0
self.cybergrasp_pub = 0
self.cyberglove_sub = 0
self.isFirstMessage = True
self.isFirstMessageArm = True
self.isReady = False
self.liste = 0
self.hasarm = 0
self.dict_pos = {}
self.dict_tar = {}
self.dict_arm_pos = {}
self.dict_arm_tar = {}
self.dict_ethercat_joints = {}
self.eth_publishers = {}
self.eth_subscribers = {}
#rospy.init_node('python_hand_library')
self.sendupdate_lock = threading.Lock()
#contains the ending for the topic depending on which controllers are loaded
self.topic_ending = ""
##EtherCAT hand
self.activate_etherCAT_hand()
###
# Grasps
self.grasp_parser = GraspParser()
process = subprocess.Popen("rospack find sr_hand".split(), stdout=subprocess.PIPE)
self.rootPath = process.communicate()[0]
self.rootPath = self.rootPath.split('\n')
self.rootPath = self.rootPath[0]
#print "path : "+self.rootPath
self.grasp_parser.parse_tree(self.rootPath+"/python_lib/grasp/grasps.xml")
self.grasp_interpoler = 0
self.pub = rospy.Publisher('srh/sendupdate',sendupdate)
self.pub_arm = rospy.Publisher('sr_arm/sendupdate',sendupdate)
self.sub_arm = rospy.Subscriber('sr_arm/shadowhand_data', joints_data,self.callback_arm)
self.sub = rospy.Subscriber('srh/shadowhand_data', joints_data ,self.callback)
threading.Thread(None, rospy.spin)
class ShadowHand_ROS():
"""
This is a python library used to easily access the shadow hand ROS interface.
"""
def __init__(self):
"""
Builds the library, creates the communication node in ROS and
initializes the hand publisher and subscriber to the default
values of shadowhand_data and sendupdate
"""
self.allJoints = [Joint("THJ1", "smart_motor_th1"),
Joint("THJ2", "smart_motor_th2", -30, 30),
Joint("THJ3", "smart_motor_th3",-15, 15),
Joint("THJ4", "smart_motor_th4",0, 75),
Joint("THJ5", "smart_motor_th5",-60, 60),
Joint("FFJ0", "smart_motor_ff2", 0, 180),
Joint("FFJ3", "smart_motor_ff3"),
Joint("FFJ4", "smart_motor_ff4", -25, 25),
Joint("MFJ0", "smart_motor_mf2", 0, 180),
Joint("MFJ3", "smart_motor_mf3"),
Joint("MFJ4", "smart_motor_mf4", -25, 25),
Joint("RFJ0", "smart_motor_rf2", 0, 180),
Joint("RFJ3", "smart_motor_rf3"),
Joint("RFJ4", "smart_motor_rf4", -25,25),
Joint("LFJ0", "smart_motor_lf2", 0, 180),
Joint("LFJ3", "smart_motor_lf3"),
Joint("LFJ4", "smart_motor_lf4", -25, 25),
Joint("LFJ5", "smart_motor_lf5", 0, 45),
Joint("WRJ1", "smart_motor_wr1", -30, 40),
Joint("WRJ2", "smart_motor_wr2", -30, 10),
]
self.handJoints = []
self.armJoints = [Joint("ShoulderJRotate", "", -45, 60),
Joint("ShoulderJSwing", "", 0, 80),
Joint("ElbowJSwing", "", 0,120),
Joint("ElbowJRotate", "", -80,80)
]
self.lastMsg = joints_data()
self.lastArmMsg = joints_data()
self.cyberglove_pub = 0
self.cyberglove_sub = 0
self.cybergrasp_pub = 0
self.cyberglove_sub = 0
self.isFirstMessage = True
self.isFirstMessageArm = True
self.isReady = False
self.liste = 0
self.hasarm = 0
self.dict_pos = {}
self.dict_tar = {}
self.dict_arm_pos = {}
self.dict_arm_tar = {}
self.dict_ethercat_joints = {}
self.eth_publishers = {}
self.eth_subscribers = {}
#rospy.init_node('python_hand_library')
self.sendupdate_lock = threading.Lock()
#contains the ending for the topic depending on which controllers are loaded
self.topic_ending = ""
##EtherCAT hand
self.activate_etherCAT_hand()
###
# Grasps
self.grasp_parser = GraspParser()
process = subprocess.Popen("rospack find sr_hand".split(), stdout=subprocess.PIPE)
self.rootPath = process.communicate()[0]
self.rootPath = self.rootPath.split('\n')
self.rootPath = self.rootPath[0]
#print "path : "+self.rootPath
self.grasp_parser.parse_tree(self.rootPath+"/python_lib/grasp/grasps.xml")
self.grasp_interpoler = 0
self.pub = rospy.Publisher('srh/sendupdate',sendupdate)
self.pub_arm = rospy.Publisher('sr_arm/sendupdate',sendupdate)
self.sub_arm = rospy.Subscriber('sr_arm/shadowhand_data', joints_data,self.callback_arm)
self.sub = rospy.Subscriber('srh/shadowhand_data', joints_data ,self.callback)
threading.Thread(None, rospy.spin)
def create_grasp_interpoler(self, current_step, next_step):
self.grasp_interpoler = GraspInterpoler(current_step, next_step)
def callback_ethercat_states(self, data, jointName):
"""
@param data: The ROS message received which called the callback
If the message is the first received, initializes the dictionnaries
Else, it updates the lastMsg
@param joint: a Joint object that contains the name of the joint that we receive data from
"""
joint_data = joint(joint_name=jointName, joint_target=math.degrees(float(data.set_point)), joint_position=math.degrees(float(data.process_value)))
# update the dictionary of joints
self.dict_ethercat_joints[joint_data.joint_name]=joint_data
# Build a CAN hand style lastMsg with the latest info in self.dict_ethercat_joints
self.lastMsg = joints_data()
for joint_name in self.dict_ethercat_joints.keys() :
self.lastMsg.joints_list.append(self.dict_ethercat_joints[joint_name])
#self.lastMsg.joints_list_length++
#TODO This is not the right way to do it. We should check that messages from all the joints have been received (but we don't know if we have all the joints, e.g three finger hand)
self.isReady = True
'''
if self.isFirstMessage :
self.init_actual_joints()
for joint in self.lastMsg.joints_list :
self.dict_pos[joint.joint_name]=joint.joint_position
self.dict_tar[joint.joint_name]=joint.joint_target
self.isFirstMessage = False
self.isReady = True
'''
def callback(self, data):
"""
@param data: The ROS message received which called the callback
If the message is the first received, initializes the dictionnaries
Else, it updates the lastMsg
"""
self.lastMsg = data;
if self.isFirstMessage :
self.init_actual_joints()
for joint in self.lastMsg.joints_list :
self.dict_pos[joint.joint_name]=joint.joint_position
self.dict_tar[joint.joint_name]=joint.joint_target
self.isFirstMessage = False
self.isReady = True
def callback_arm(self, data):
"""
@param data: The ROS message received which called the callback
If the message is the first received, initializes the dictionnaries
Else, it updates the lastMsg
"""
self.lastArmMsg = data
if self.isFirstMessageArm :
for joint in self.lastArmMsg.joints_list :
self.dict_arm_pos[joint.joint_name]=joint.joint_position
self.dict_arm_tar[joint.joint_name]=joint.joint_target
def init_actual_joints(self):
"""
Initializes the library with just the fingers actually connected
"""
for joint_all in self.allJoints :
for joint_msg in self.lastMsg.joints_list :
if joint_msg.joint_name == joint_all.name:
self.handJoints.append(joint_all)
def check_hand_type(self):
"""
@return : true if some hand is detected
"""
if self.check_etherCAT_hand_presence():
return "etherCAT"
elif self.check_gazebo_hand_presence():
return "gazebo"
elif self.check_CAN_hand_presence():
return "CANhand"
return None
def check_CAN_hand_presence(self):
"""
@return : true if the CAN hand is detected
"""
t = 0.0
while not self.isReady:
time.sleep(1.0)
t = t+1.0
rospy.loginfo("Waiting for service since "+str(t)+" seconds...")
if t >= 5.0:
rospy.logerr("No hand found. Are you sure the ROS hand is running ?")
return False
return True
def set_shadowhand_data_topic(self, topic):
"""
@param topic: The new topic to be set as the hand publishing topic
Set the library to listen to a new topic
"""
print 'Changing subscriber to ' + topic
self.sub = rospy.Subscriber(topic, joints_data ,self.callback)
def set_sendupdate_topic(self, topic):
"""
@param topic: The new topic to be set as the hand subscribing topic
Set the library to publish to a new topic
"""
print 'Changing publisher to ' + topic
self.pub = rospy.Publisher(topic,sendupdate)
def sendupdate_from_dict(self, dicti):
"""
@param dicti: Dictionnary containing all the targets to send, mapping the name of the joint to the value of its target
Sends new targets to the hand from a dictionnary
"""
#print(dicti)
if (self.check_hand_type() == "etherCAT") or (self.check_hand_type() == "gazebo"):
for join in dicti.keys():
if not self.eth_publishers.has_key(join):
topic = "/sh_"+ join.lower() + self.topic_ending+"/command"
self.eth_publishers[join] = rospy.Publisher(topic, Float64)
msg_to_send = Float64()
msg_to_send.data = math.radians( float( dicti[join] ) )
self.eth_publishers[join].publish(msg_to_send)
elif self.check_hand_type() == "CANhand":
message = []
for join in dicti.keys():
message.append(joint(joint_name=join, joint_target=dicti[join]))
self.pub.publish(sendupdate(len(message), message))
def sendupdate(self, jointName, angle=0):
"""
@param jointName: Name of the joint to update
@param angle: Target of the joint, 0 if not set
Sends a new target for the specified joint
"""
self.sendupdate_lock.acquire()
if (self.check_hand_type() == "etherCAT") or (self.check_hand_type() == "gazebo"):
if not self.eth_publishers.has_key(jointName):
topic = "/sh_"+ jointName.lower() + self.topic_ending + "/command"
self.eth_publishers[jointName] = rospy.Publisher(topic, Float64)
msg_to_send = Float64()
msg_to_send.data = math.radians( float( angle ) )
self.eth_publishers[jointName].publish(msg_to_send)
elif self.check_hand_type() == "CANhand":
message = [joint(joint_name=jointName, joint_target=angle)]
self.pub.publish(sendupdate(len(message), message))
self.sendupdate_lock.release()
def sendupdate_arm_from_dict(self, dicti):
"""
@param dicti: Dictionnary containing all the targets to send, mapping the name of the joint to the value of its target
Sends new targets to the hand from a dictionnary
"""
message = []
for join in dicti.keys():
message.append(joint(joint_name=join, joint_target=dicti[join]))
self.pub_arm.publish(sendupdate(len(message), message))
def sendupdate_arm(self, jointName, angle=0):
"""
@param jointName: Name of the joint to update
@param angle: Target of the joint, 0 if not set
Sends a new target for the specified joint
"""
message = [joint(joint_name=jointName, joint_target=angle)]
self.pub_arm.publish(sendupdate_arm(len(message), message))
def valueof(self, jointName):
"""
@param jointName: Name of the joint to read the value
@return: 'NaN' if the value is not correct, the actual position of the joint else
"""
for joint in self.lastMsg.joints_list:
if joint.joint_name == jointName:
return float(joint.joint_position)
for joint in self.lastArmMsg.joints_list:
if joint.joint_name == jointName:
return float(joint.joint_position)
return 'NaN'
def has_arm(self):
"""
@return : True if an arm is detected on the roscore
"""
if not self.hasarm == 0:
return self.hasarm
self.hasarm = False
if self.liste == 0:
master = rosgraph.masterapi.Master('/rostopic')
self.liste = master.getPublishedTopics('/')
for topic_typ in self.liste :
for topic in topic_typ:
if 'sr_arm/shadowhand_data' in topic :
self.hasarm = True
return self.hasarm
def record_step_to_file(self, filename, grasp_as_xml):
"""
@param filename: name (or path) of the file to save to
@param grasp_as_xml: xml-formatted grasp
Write the grasp at the end of the file, creates the file if does not exist
"""
if os.path.exists(filename) :
obj = open(filename, 'r')
text = obj.readlines()
obj.close()
objWrite = open(filename,'w')
for index in range(0,len(text)-1):
objWrite.write(text[index])
objWrite.write(grasp_as_xml)
objWrite.write('</root>')
objWrite.close()
else :
objWrite = open(filename,'w')
objWrite.write('<root>\n')
objWrite.write(grasp_as_xml)
objWrite.write('</root>')
objWrite.close()
def save_hand_position_to_file(self, filename):
objFile=open(filename,'w')
for key, value in self.dict_pos:
objFile.write(key + ' ' + value + '\n')
objFile.close()
def read_all_current_positions(self):
"""
@return: dictionnary mapping joint names to actual positions
Read all the positions in the lastMsg
"""
if not self.isReady:
return
for joint in self.lastMsg.joints_list:
self.dict_pos[joint.joint_name] = joint.joint_position
return self.dict_pos
def read_all_current_targets(self):
"""
@return: dictionnary mapping joint names to current targets
Read all the targets in the lastMsg
"""
for joint in self.lastMsg.joints_list:
self.dict_tar[joint.joint_name] = joint.joint_target
return self.dict_tar
def read_all_current_arm_positions(self):
"""
@return: dictionnary mapping joint names to actual positions
Read all the positions in the lastMsg
"""
for joint in self.lastArmMsg.joints_list:
self.dict_arm_pos[joint.joint_name] = joint.joint_position
return self.dict_arm_pos
def read_all_current_arm_targets(self):
"""
@return: dictionnary mapping joint names to actual targets
Read all the targets in the lastMsg
"""
for joint in self.lastArmMsg.joints_list:
self.dict_arm_tar[joint.joint_name] = joint.joint_target
return self.dict_arm_tar
def resend_targets(self):
"""
Resend the targets read in the lastMsg to the hand
"""
for key, value in self.dict_tar.items():
self.sendupdate(jointName=key, angle=value)
def callVisualisationService(self, callList=0, reset = 0):
"""
@param callList: dictionnary mapping joint names to information that should be displayed
@param reset: flag used to tell if the parameters should be replaced by the new ones or just added to the previous ones
Calls a ROS service to display various information in Rviz
"""
if reset == 0:
print 'no reset'
if reset == 1:
print 'reset'
def check_etherCAT_hand_presence(self):
"""
Only used to check if a real etherCAT hand is detected in the system
check if something is being published to this topic, otherwise
return false
"""
try:
rospy.wait_for_message("/joint_states", JointState, timeout = 0.2)
except:
rospy.logwarn("no message received from /joint_states")
return False
return True
def check_gazebo_hand_presence(self):
"""
Only used to check if a Gazebo simulated (etherCAT protocol) hand is detected in the system
check if something is being published to this topic, otherwise
return false
"""
try:
rospy.wait_for_message("/gazebo/joint_states", JointState, timeout = 0.2)
except:
return False
return True
def activate_etherCAT_hand(self):
"""
At the moment we just try to use the mixed position velocity controllers
"""
success = True
for joint_all in self.allJoints :
self.topic_ending = "_mixed_position_velocity_controller"
topic = "/sh_"+ joint_all.name.lower() + self.topic_ending + "/state"
success = True
try:
rospy.wait_for_message(topic, JointControllerState, timeout = 0.2)
except:
try:
self.topic_ending = "_position_controller"
topic = "/sh_"+ joint_all.name.lower() + self.topic_ending + "/state"
rospy.wait_for_message(topic, pr2_controllers_msgs.msg.JointControllerState, timeout = 0.2)
except:
success = False
if success:
if self.topic_ending == "_mixed_position_velocity_controller":
self.eth_subscribers[joint_all.name] = rospy.Subscriber(topic, JointControllerState, self.callback_ethercat_states, joint_all.name)
else:
self.eth_subscribers[joint_all.name] = rospy.Subscriber(topic, pr2_controllers_msgs.msg.JointControllerState, self.callback_ethercat_states, joint_all.name)
if len(self.eth_subscribers) > 0:
return True
return False
