mcusleepc.nc

来自「tinyos-2.x.rar」· NC 代码 · 共 77 行

/*
 * Copyright (c) 2005 Arched Rock Corporation 
 * All rights 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 the Arched Rock Corporation nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ARCHED
 * ROCK OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
/**
 * Implementation of TEP 112 (Microcontroller Power Management) for
 * the Intel Xscale PXA27x
 *
 * <pre>
 *  $Id: McuSleepC.nc,v 1.5 2008/07/23 17:25:42 idgay Exp $
 * </pre>
 *
 * @author Philip Buonadonna
 *
 */

module McuSleepC {
  provides {
    interface McuSleep;
    interface McuPowerState;
  }
  uses {
    interface McuPowerOverride;
  }
}
implementation {
  
  async command void McuSleep.sleep() {
    // Put idle into here.
    asm volatile (
		  "mcr p14,0,%0,c7,c0,0"
		  : 
		  : "r" (PWRMODE_M_IDLE)
		  );
    __nesc_enable_interrupt();
    // All of memory may change at this point...
    asm volatile ("" : : : "memory");
    __nesc_disable_interrupt();
    return;
  }

  async command void McuPowerState.update() {

    return;
  }

 default async command mcu_power_t McuPowerOverride.lowestState() {
   return 0;
 }

}