controllers.py

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#!/usr/bin/env python

# Copyright (c) 2010-2011 Vanadium Labs LLC. 
# All right reserved.
#
# 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
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of Vanadium Labs LLC 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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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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class Controller:

    
    def __init__(self, device, name):
        self.name = name
        self.device = device
        self.fake = device.fake
        self.pause = False

        # output for joint states publisher
        self.joint_names = list()
        self.joint_positions = list()
        self.joint_velocities = list()

    
    def startup(self):
        pass

    
    def update(self):
        pass

    
    def shutdown(self):
        pass

    
    def active(self):
        return False
        
    
    def getDiagnostics(self):
        msg = DiagnosticStatus()
        msg.name = self.name
        msg.level = DiagnosticStatus.OK
        msg.message = "OK"
        return msg