// $Id: HPLPowerManagementM.nc,v 1.4.4.5 2003/09/11 20:50:16 idgay Exp $ /* tab:4 * "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." * * Copyright (c) 2002-2003 Intel Corporation * All rights reserved. * * This file is distributed under the terms in the attached INTEL-LICENSE * file. If you do not find these files, copies can be found by writing to * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, * 94704. Attention: Intel License Inquiry. */ /* Author: Robert Szewczyk * * $Id: HPLPowerManagementM.nc,v 1.4.4.5 2003/09/11 20:50:16 idgay Exp $ */ /** * @author Robert Szewczyk */ module HPLPowerManagementM { provides { interface PowerManagement; command result_t Enable(); command result_t Disable(); } } implementation{ bool disabled = TRUE; enum { IDLE = 0, ADC_NR = (1 POWER_SAVE = (1 POWER_DOWN = (1 }; uint8_t io_count; uint8_t getPowerLevel() { uint8_t diff; if (inp(TIMSK) & (~((1 // running? return IDLE; } else if (bit_is_set(SPCR, SPIE)) { // SPI (Radio stack on mica) return IDLE; } else if (inp(UCR) & ((1 return IDLE; // } else if (bit_is_set(ACSR, ACIE)) { //Analog comparator // return IDLE; } else if (bit_is_set(ADCSR, ADEN)) { // ADC is enabled return ADC_NR; } else if (inp(TIMSK) & ((1 diff = inp(OCR0) - inp(TCNT0); if (diff < 16) return IDLE; return POWER_SAVE; } else { return POWER_DOWN; } } task void doAdjustment() { uint8_t foo, mcu; foo = getPowerLevel(); mcu = inp(MCUCR); mcu &= 0xe3; if (foo == POWER_SAVE) { mcu |= IDLE; while ((inp(ASSR) & 0x7) != 0) { asm volatile("nop"); } mcu &= 0xe3; } mcu |= foo; outp(mcu, MCUCR); sbi(MCUCR, SE); } async command uint8_t PowerManagement.adjustPower() { uint8_t mcu; if (!disabled) post doAdjustment(); else { mcu = inp(MCUCR); mcu &= 0xe3; mcu |= IDLE; outp(mcu, MCUCR); sbi(MCUCR, SE); } return 0; } command result_t Enable() { atomic disabled = FALSE; return SUCCESS; } command result_t Disable() { atomic disabled = TRUE; return SUCCESS; } }
