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/*
* Copyright (C) 2014 Freie Universitรคt Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup cpu_saml21
* @{
*
* @file lpm_arch.c
* @brief Implementation of the kernels power management interface
*
* @author Thomas Eichinger <thomas.eichinger@fu-berlin.de>
*
* @}
*/
#include <stdio.h>
#include "lpm.h"
#include "arch/lpm_arch.h"
#include "cpu.h"
#define ENABLE_DEBUG 0
#include "debug.h"
void lpm_arch_init(void)
{
MCLK->APBAMASK.reg |= MCLK_APBAMASK_PM;
PM->CTRLA.reg = PM_CTRLA_MASK & (~PM_CTRLA_IORET);
SUPC->BOD33.bit.ENABLE=0;
lpm_prevent_sleep = 1;
}
enum lpm_mode lpm_arch_set(enum lpm_mode target)
{
uint32_t mode;
switch(target) {
case LPM_IDLE:
DEBUG("lpm_arch_set(): setting IDLE mode.\n");
mode = PM_SLEEPCFG_SLEEPMODE_IDLE2;
break;
case LPM_SLEEP:
DEBUG("lpm_arch_set(): setting STANDBY mode.\n");
mode = PM_SLEEPCFG_SLEEPMODE_STANDBY;
break;
case LPM_POWERDOWN:
DEBUG("lpm_arch_set(): setting BACKUP mode.\n");
mode = PM_SLEEPCFG_SLEEPMODE_BACKUP;
break;
default:
DEBUG("lpm_arch_set(): unhandled low-power mode.\n");
return 0;
}
/* write sleep configuration */
PM->SLEEPCFG.bit.SLEEPMODE = mode;
/* make sure value has been set */
while (PM->SLEEPCFG.bit.SLEEPMODE != mode) {}
/* ensure all memory accesses have completed */
__DSB();
/* go to sleep mode (issue wait-for-interrupt instruction) */
__WFI();
return 0;
}
enum lpm_mode lpm_arch_get(void)
{
// TODO
return 0;
}
void lpm_arch_awake(void)
{
// TODO
}
void lpm_arch_begin_awake(void)
{
// TODO
}
void lpm_arch_end_awake(void)
{
// TODO
}
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