nao_imu_conversion.py

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#!/usr/bin/env python

# SVN $HeadURL$
# SVN $Id$


#
# ROS node to from nao's IMU message to a standard sensor_msgs IMU
#
# Copyright 2013 Armin Hornung, University of Freiburg
# http://www.ros.org/wiki/nao
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#    # Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#    # Redistributions in binary form must reproduce the above copyright
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#       documentation and/or other materials provided with the distribution.
#    # Neither the name of the University of Freiburg nor the names of its
#       contributors may be used to endorse or promote products derived from
#       this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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import roslib
roslib.load_manifest('nao_remote')
import rospy

from sensor_msgs.msg import Imu

from nao_msgs.msg import TorsoIMU
from tf import transformations as tf

pub = None

def handleIMU(data):
  rospy.logdebug("TorsoIMU received for conversion: %f %f", data.angleX, data.angleY)
  imu_msg = Imu()
  q = tf.quaternion_from_euler(data.angleX, data.angleY, 0.0)
  imu_msg.header = data.header
  imu_msg.orientation.x = q[0]
  imu_msg.orientation.y = q[1]
  imu_msg.orientation.z = q[2]
  imu_msg.orientation.w = q[3]
  
  pub.publish(imu_msg)

  

if __name__ == '__main__':

  rospy.init_node('nao_imu_conversion')
  pub = rospy.Publisher('imu', Imu)
  rospy.Subscriber("torso_imu", TorsoIMU, handleIMU, queue_size=50)
  
  
  rospy.spin()
  exit(0)