//$Id: GlowLedsM.nc,v 1.6 2005/07/29 22:35:43 jpolastre Exp $/* "Copyright (c) 2000-2003 The Regents of the University of California.   * All rights reserved. * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose, without fee, and without written agreement * is hereby granted, provided that the above copyright notice, the following * two paragraphs and the author appear in all copies of this software. *  * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY * OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS." *///@author Cory Sharp <cssharp@eecs.berkeley.edu>module GlowLedsM{  provides interface StdControl;  uses interface Timer;  uses interface LedsIntensity;}implementation{  int8_t m_acc[3];  uint8_t m_state[3];  enum {    MAX_VAL = 32,    MAX_DELAY_COUNT = 8,    LED_OFF = 0,    LED_UP = 1,    LED_DOWN = 2,    NO_LED = 4,    CYCLE_END = 5,  };  const int8_t m_cycle[] = {    0, 1, 2, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED,    2, 1, 0, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED,    CYCLE_END,  };  uint8_t m_delay_count;  uint8_t m_cycle_count;  command result_t StdControl.init()  {    m_acc[0] = 0;    m_acc[1] = 0;    m_acc[2] = 0;    m_state[0] = LED_OFF;    m_state[1] = LED_OFF;    m_state[2] = LED_OFF;    m_delay_count = 0;    m_cycle_count = 0;    return SUCCESS;  }  command result_t StdControl.start()  {    call Timer.start( TIMER_REPEAT, 20 );    return SUCCESS;  }  command result_t StdControl.stop()  {    call Timer.stop();    return SUCCESS;  }  void incLeds()  {    int i;    for( i=0; i<3; i++ )    {      switch( m_state[i] )      {	case LED_OFF:	  break;	case LED_UP:	  if( ++m_acc[i] >= (MAX_VAL-1) )	  {	    m_acc[i] = (MAX_VAL-1);	    m_state[i] = LED_DOWN;	  }	  call LedsIntensity.set( i, m_acc[i] << 3 );	  break;	case LED_DOWN:	  if( --m_acc[i] <= 0 )	  {	    m_acc[i] = 0;	    m_state[i] = LED_OFF;	  }	  call LedsIntensity.set( i, m_acc[i] << 3 );	  break;      }    }  }  event result_t Timer.fired()  {    if( ++m_delay_count >= MAX_DELAY_COUNT )    {      m_delay_count = 0;      if( m_cycle[m_cycle_count] < NO_LED )	m_state[m_cycle[m_cycle_count]] = LED_UP;      if( m_cycle[++m_cycle_count] == CYCLE_END )	m_cycle_count = 0;    }    incLeds();    return SUCCESS;  }}