/** | |
* \file | |
* | |
* \brief Sleep mode access | |
* | |
* Copyright (c) 2012 Atmel Corporation. All rights reserved. | |
* | |
* \asf_license_start | |
* | |
* \page License | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are met: | |
* | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* | |
* 3. The name of Atmel may not be used to endorse or promote products derived | |
* from this software without specific prior written permission. | |
* | |
* 4. This software may only be redistributed and used in connection with an | |
* Atmel microcontroller product. | |
* | |
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED | |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE | |
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR | |
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
* POSSIBILITY OF SUCH DAMAGE. | |
* | |
* \asf_license_stop | |
* | |
*/ | |
#ifndef SLEEP_H | |
#define SLEEP_H | |
#ifdef __cplusplus | |
extern "C" { | |
#endif | |
#include <compiler.h> | |
/** | |
* \defgroup sleep_group Backup Power Manager (BPM) | |
* | |
* This is a stub on the SAM4L Backup Power Manager(BPM) for the sleepmgr service. | |
* | |
* \note To minimize the code overhead, these functions do not feature | |
* interrupt-protected access since they are likely to be called inside | |
* interrupt handlers or in applications where such protection is not | |
* necessary. If such protection is needed, it must be ensured by the calling | |
* code. | |
* | |
* @{ | |
*/ | |
#if defined(__DOXYGEN__) | |
/** | |
* \brief Sets the MCU in the specified sleep mode | |
* \param sleep_mode Sleep mode to set. | |
*/ | |
#endif | |
#include "bpm.h" | |
static inline void bpm_sleep(Bpm *bpm, uint32_t sleep_mode) | |
{ | |
uint32_t pmcon; | |
/* Read PMCON register */ | |
pmcon = bpm->BPM_PMCON; | |
pmcon &= ~BPM_PMCON_BKUP; | |
pmcon &= ~BPM_PMCON_RET; | |
pmcon &= ~BPM_PMCON_SLEEP_Msk; | |
/* Unlock PMCON register */ | |
BPM_UNLOCK(PMCON); | |
if (sleep_mode == BPM_SM_SLEEP_0) { | |
pmcon |= BPM_PMCON_SLEEP(0); | |
bpm->BPM_PMCON = pmcon; | |
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; | |
} else if (sleep_mode == BPM_SM_SLEEP_1) { | |
pmcon |= BPM_PMCON_SLEEP(1); | |
bpm->BPM_PMCON = pmcon; | |
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; | |
} else if (sleep_mode == BPM_SM_SLEEP_2) { | |
pmcon |= BPM_PMCON_SLEEP(2); | |
bpm->BPM_PMCON = pmcon; | |
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; | |
} else if (sleep_mode == BPM_SM_SLEEP_3) { | |
pmcon |= BPM_PMCON_SLEEP(3); | |
bpm->BPM_PMCON = pmcon; | |
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; | |
} else if (sleep_mode == BPM_SM_WAIT) { | |
bpm->BPM_PMCON = pmcon; | |
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; | |
} else if (sleep_mode == BPM_SM_RET) { | |
pmcon |= BPM_PMCON_RET; | |
bpm->BPM_PMCON = pmcon; | |
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; | |
} else { /* if (sleep_mode == BPM_SM_BACKUP) */ | |
pmcon |= BPM_PMCON_BKUP; | |
bpm->BPM_PMCON = pmcon; | |
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; | |
} | |
/* Wait until vreg is ok. */ | |
while(!(BSCIF->BSCIF_PCLKSR & BSCIF_PCLKSR_VREGOK)); | |
asm volatile ("wfi"); | |
/* ensure sleep request propagation to flash. */ | |
asm volatile ("nop"); | |
/* The interrupts wake-up from the previous wfi, but there are still | |
* masked since we are in the critical section thanks to the previous | |
* set_pri_mask(1). Thus, we need to leave the critical section. | |
* Please note that we should probably use something like | |
* cpu_leave_critical(), using set_pri_mask(0) | |
*/ | |
/* In this demo interrupts are managed by the FreeRTOS kernel and must not | |
be altered here so the following line has been removed _RB_ | |
cpu_irq_enable(); */ | |
} | |
//! @} | |
#ifdef __cplusplus | |
} | |
#endif | |
#endif /* SLEEP_H */ | |