| /** | |
| * \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 */ | |