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113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
/******************************************************************************
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Copyright (C) 2013, Freie Universitaet Berlin (FUB). All rights reserved.
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These sources were developed at the Freie Universitaet Berlin, Computer Systems
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and Telematics group (http://cst.mi.fu-berlin.de).
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-------------------------------------------------------------------------------
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This file is part of RIOT.
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This file subject to the terms and conditions of the GNU Lesser General Public
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License. See the file LICENSE in the top level directory for more details.
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*******************************************************************************/
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/**
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* @ingroup lpc2387
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* @ingroup lpm
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* @{
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*/
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/**
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* @file
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* @brief LPC2387 Low-Power management
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* @ingroup lpc2387
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*
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* @author Freie Universität Berlin, Computer Systems & Telematics
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* @author Heiko Will
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* @version $Revision$
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*
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* @note $Id$
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "lpc23xx.h"
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#include "lpc2387.h"
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#include "lpm.h"
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/* lpm is accessed before memory init and initialized separately through code */
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__attribute__((section(".noinit")))
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static enum lpm_mode lpm;
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extern void init_clks1(void);
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extern void init_clks2(void);
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#define ENABLE_DEBUG 0
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#include <debug.h>
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void lpm_init(void) {
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lpm = LPM_ON;
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}
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#define LPM_DEBUG 1
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void lpm_begin_awake(void) {
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if (lpm >= LPM_SLEEP ) { // wake up from deep sleep
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init_clks1();
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}
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}
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void lpm_end_awake(void) {
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if( lpm >= LPM_SLEEP ) { // wake up from deep sleep
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init_clks2();
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}
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lpm = LPM_ON;
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}
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void lpm_awake(void) {
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#if LPM_DEBUG
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unsigned long usec = RTC_CTC;
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#endif
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if( lpm >= LPM_SLEEP ) { // wake up from deep sleep
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//benchmark
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init_clks1();
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init_clks2();
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// Debug tests
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#if LPM_DEBUG
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usec = RTC_CTC-usec;
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DEBUG("Wakeup in %lu usecs\n",usec * 31);
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#endif
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}
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lpm = LPM_ON;
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}
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enum lpm_mode lpm_set(enum lpm_mode target) {
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unsigned target_flags;
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enum lpm_mode last_lpm = lpm;
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/* calculate target mcu power mode */
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if( target == LPM_IDLE )
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target_flags = PM_IDLE;
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else if( target == LPM_SLEEP )
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target_flags = PM_SLEEP;
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else if( target == LPM_POWERDOWN )
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target_flags = PM_POWERDOWN;
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else
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target_flags = 0;
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lpm = target;
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#if iENABLE_DEBUG
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DEBUG("# LPM power down %u -> %u", lpm, target);
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#endif
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PCON |= target_flags; // set target power mode
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return last_lpm;
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}
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/*---------------------------------------------------------------------------*/
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enum lpm_mode
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lpm_get(void) {
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return lpm;
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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