Ermanno Brusadin / mbed-src

targets/hal/TARGET_STM/TARGET_STM32F3XX/sleep.c@0:0a673c671a56, 2016-07-27 (annotated)

Committer:
ebrus
Date:
Wed Jul 27 18:35:32 2016 +0000
Revision:
0:0a673c671a56
4

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ebrus 0:0a673c671a56 1 /* mbed Microcontroller Library
ebrus 0:0a673c671a56 2 *******************************************************************************
ebrus 0:0a673c671a56 3 * Copyright (c) 2014, STMicroelectronics
ebrus 0:0a673c671a56 4 * All rights reserved.
ebrus 0:0a673c671a56 5 *
ebrus 0:0a673c671a56 6 * Redistribution and use in source and binary forms, with or without
ebrus 0:0a673c671a56 7 * modification, are permitted provided that the following conditions are met:
ebrus 0:0a673c671a56 8 *
ebrus 0:0a673c671a56 9 * 1. Redistributions of source code must retain the above copyright notice,
ebrus 0:0a673c671a56 10 * this list of conditions and the following disclaimer.
ebrus 0:0a673c671a56 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
ebrus 0:0a673c671a56 12 * this list of conditions and the following disclaimer in the documentation
ebrus 0:0a673c671a56 13 * and/or other materials provided with the distribution.
ebrus 0:0a673c671a56 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ebrus 0:0a673c671a56 15 * may be used to endorse or promote products derived from this software
ebrus 0:0a673c671a56 16 * without specific prior written permission.
ebrus 0:0a673c671a56 17 *
ebrus 0:0a673c671a56 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ebrus 0:0a673c671a56 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ebrus 0:0a673c671a56 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ebrus 0:0a673c671a56 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ebrus 0:0a673c671a56 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ebrus 0:0a673c671a56 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ebrus 0:0a673c671a56 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ebrus 0:0a673c671a56 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ebrus 0:0a673c671a56 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ebrus 0:0a673c671a56 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ebrus 0:0a673c671a56 28 *******************************************************************************
ebrus 0:0a673c671a56 29 */
ebrus 0:0a673c671a56 30 #include "sleep_api.h"
ebrus 0:0a673c671a56 31 #include "cmsis.h"
ebrus 0:0a673c671a56 32
ebrus 0:0a673c671a56 33 // This function is in the system_stm32f30x.c file
ebrus 0:0a673c671a56 34 extern void SetSysClock(void);
ebrus 0:0a673c671a56 35
ebrus 0:0a673c671a56 36 // MCU SLEEP mode
ebrus 0:0a673c671a56 37 void sleep(void) {
ebrus 0:0a673c671a56 38 // Enable PWR clock
ebrus 0:0a673c671a56 39 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
ebrus 0:0a673c671a56 40
ebrus 0:0a673c671a56 41 // Request to enter SLEEP mode
ebrus 0:0a673c671a56 42 PWR_EnterSleepMode(PWR_SLEEPEntry_WFI);
ebrus 0:0a673c671a56 43 }
ebrus 0:0a673c671a56 44
ebrus 0:0a673c671a56 45 // MCU STOP mode
ebrus 0:0a673c671a56 46 void deepsleep(void) {
ebrus 0:0a673c671a56 47 // Enable PWR clock
ebrus 0:0a673c671a56 48 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
ebrus 0:0a673c671a56 49
ebrus 0:0a673c671a56 50 // Enter Stop Mode
ebrus 0:0a673c671a56 51 PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
ebrus 0:0a673c671a56 52
ebrus 0:0a673c671a56 53 // After wake-up from STOP reconfigure the PLL
ebrus 0:0a673c671a56 54 SetSysClock();
ebrus 0:0a673c671a56 55 }