mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2014 Freie Universität 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 "arch/lpm_arch.h"
|
|
#include "cpu.h"
|
|
#include "kernel.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
|
|
}
|