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63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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* Copyright (C) 2017 Kaspar Schleiser <kaspar@schleiser.de>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_saml21
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* @ingroup drivers_periph_pm
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* @{
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*
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* @file
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* @brief Implementation of the kernels power management interface
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*
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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*
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* @}
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*/
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#include "periph/pm.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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void pm_set(unsigned mode)
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{
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int deep = 0;
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uint32_t _mode;
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switch (mode) {
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case SAML21_PM_MODE_BACKUP:
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DEBUG_PUTS("pm_set(): setting BACKUP mode.");
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_mode = PM_SLEEPCFG_SLEEPMODE_BACKUP;
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deep = 1;
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break;
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case SAML21_PM_MODE_STANDBY:
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DEBUG_PUTS("pm_set(): setting STANDBY mode.");
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_mode = PM_SLEEPCFG_SLEEPMODE_STANDBY;
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deep = 1;
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break;
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case SAML21_PM_MODE_IDLE:
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DEBUG_PUTS("pm_set(): setting IDLE mode.");
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#if !defined(PM_SLEEPCFG_SLEEPMODE_IDLE2)
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_mode = PM_SLEEPCFG_SLEEPMODE_IDLE;
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#else
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_mode = PM_SLEEPCFG_SLEEPMODE_IDLE2;
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#endif
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break;
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default:
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/* don't sleep at all */
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return;
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}
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/* write sleep configuration */
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PM->SLEEPCFG.reg = _mode;
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/* make sure value has been set */
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while ((PM->SLEEPCFG.reg & PM_SLEEPCFG_SLEEPMODE_Msk) != _mode) {}
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sam0_cortexm_sleep(deep);
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}
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