sim_sensor.py
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00001 #! /usr/bin/python
00002 
00003 #***********************************************************
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00036 
00037 # Author: Blaise Gassend
00038 
00039 # Simulates the presence of a fingertip sensor
00040 
00041 import roslib
00042 roslib.load_manifest('fingertip_pressure')
00043 import rospy
00044 from math import sin, cos
00045 import threading
00046 
00047 from pr2_msgs.msg import PressureState
00048 
00049 class pressureSimulator:
00050     def callback(self, pressurestate):
00051         #print "callback"
00052         self.l_finger_tip = pressurestate.l_finger_tip
00053         self.r_finger_tip = pressurestate.r_finger_tip
00054         self.datatimestamp = pressurestate.header.stamp
00055         self.dataready = True
00056 
00057     def publish(self):
00058         ps = PressureState()
00059         ps.header.stamp = rospy.get_rostime();
00060         ps.l_finger_tip = []
00061         ps.r_finger_tip = []
00062         t = rospy.get_time()
00063         for i in range(0,22):
00064             ph = .1 * t * (i / 22. + 1)
00065             ps.l_finger_tip.append(4000*(1+sin(ph)))
00066             ps.r_finger_tip.append(4000*(1+cos(ph)))
00067         self.pub.publish(ps)
00068 
00069     def __init__(self, dest):
00070         rospy.init_node('sim_sensor', anonymous=True)
00071         rospy.sleep(.2)
00072         
00073         self.pub = rospy.Publisher(dest, PressureState)
00074         
00075 
00076 if __name__ == '__main__':
00077     #@todo it would be nice to read an xml configuration file to get these parameters.
00078     s1 = pressureSimulator('pressure/r_gripper_motor')
00079     s2 = pressureSimulator('pressure/l_gripper_motor')
00080         
00081     while not rospy.is_shutdown():
00082         rospy.sleep(0.1)
00083         s1.publish()
00084         s2.publish()


fingertip_pressure
Author(s): Blaise Gassend/blaise@willowgarage.com
autogenerated on Thu Apr 24 2014 15:43:41