Chau Vo / mbed-dev

mbed library sources. Supersedes mbed-src. RTC working even after reset

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32L1/sleep.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 *******************************************************************************
bogdanm 0:9b334a45a8ff 3 * Copyright (c) 2014, STMicroelectronics
bogdanm 0:9b334a45a8ff 4 * All rights reserved.
bogdanm 0:9b334a45a8ff 5 *
bogdanm 0:9b334a45a8ff 6 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 7 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 10 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 12 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 13 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 15 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 16 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 17 *
bogdanm 0:9b334a45a8ff 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 28 *******************************************************************************
bogdanm 0:9b334a45a8ff 29 */
bogdanm 0:9b334a45a8ff 30 #include "sleep_api.h"
bogdanm 0:9b334a45a8ff 31
bogdanm 0:9b334a45a8ff 32 #if DEVICE_SLEEP
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 static TIM_HandleTypeDef TimMasterHandle;
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 void sleep(void)
bogdanm 0:9b334a45a8ff 39 {
bogdanm 0:9b334a45a8ff 40 // Disable HAL tick interrupt
bogdanm 0:9b334a45a8ff 41 TimMasterHandle.Instance = TIM5;
bogdanm 0:9b334a45a8ff 42 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
bogdanm 0:9b334a45a8ff 43
bogdanm 0:9b334a45a8ff 44 // Request to enter SLEEP mode
bogdanm 0:9b334a45a8ff 45 HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 // Enable HAL tick interrupt
bogdanm 0:9b334a45a8ff 48 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
bogdanm 0:9b334a45a8ff 49 }
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 void deepsleep(void)
bogdanm 0:9b334a45a8ff 52 {
bogdanm 0:9b334a45a8ff 53 #if defined(TARGET_MOTE_L152RC)
bogdanm 0:9b334a45a8ff 54 int8_t STOPEntry = PWR_STOPENTRY_WFI;
bogdanm 0:9b334a45a8ff 55 #endif
bogdanm 0:9b334a45a8ff 56
bogdanm 0:9b334a45a8ff 57 // Disable HAL tick interrupt
bogdanm 0:9b334a45a8ff 58 TimMasterHandle.Instance = TIM5;
bogdanm 0:9b334a45a8ff 59 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
bogdanm 0:9b334a45a8ff 60
bogdanm 0:9b334a45a8ff 61 #if defined(TARGET_MOTE_L152RC)
bogdanm 0:9b334a45a8ff 62 /* Select the regulator state in Stop mode: Set PDDS and LPSDSR bit according to PWR_Regulator value */
bogdanm 0:9b334a45a8ff 63 MODIFY_REG(PWR->CR, (PWR_CR_PDDS | PWR_CR_LPSDSR), PWR_LOWPOWERREGULATOR_ON);
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 /* Set SLEEPDEEP bit of Cortex System Control Register */
bogdanm 0:9b334a45a8ff 66 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
bogdanm 0:9b334a45a8ff 67
bogdanm 0:9b334a45a8ff 68 /* Select Stop mode entry --------------------------------------------------*/
bogdanm 0:9b334a45a8ff 69 if(STOPEntry == PWR_STOPENTRY_WFI)
bogdanm 0:9b334a45a8ff 70 {
bogdanm 0:9b334a45a8ff 71 /* Request Wait For Interrupt */
bogdanm 0:9b334a45a8ff 72 __WFI();
bogdanm 0:9b334a45a8ff 73 }
bogdanm 0:9b334a45a8ff 74 else
bogdanm 0:9b334a45a8ff 75 {
bogdanm 0:9b334a45a8ff 76 /* Request Wait For Event */
bogdanm 0:9b334a45a8ff 77 __SEV();
bogdanm 0:9b334a45a8ff 78 __WFE();
bogdanm 0:9b334a45a8ff 79 __WFE();
bogdanm 0:9b334a45a8ff 80 }
bogdanm 0:9b334a45a8ff 81 __NOP();
bogdanm 0:9b334a45a8ff 82 __NOP();
bogdanm 0:9b334a45a8ff 83 __NOP();
bogdanm 0:9b334a45a8ff 84 /* Reset SLEEPDEEP bit of Cortex System Control Register */
bogdanm 0:9b334a45a8ff 85 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
bogdanm 0:9b334a45a8ff 86 #else
bogdanm 0:9b334a45a8ff 87 // Request to enter STOP mode with regulator in low power mode
bogdanm 0:9b334a45a8ff 88 HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
bogdanm 0:9b334a45a8ff 89 #endif
bogdanm 0:9b334a45a8ff 90
bogdanm 0:9b334a45a8ff 91 // After wake-up from STOP reconfigure the PLL
bogdanm 0:9b334a45a8ff 92 SetSysClock();
bogdanm 0:9b334a45a8ff 93
bogdanm 0:9b334a45a8ff 94 // Enable HAL tick interrupt
bogdanm 0:9b334a45a8ff 95 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
bogdanm 0:9b334a45a8ff 96 }
bogdanm 0:9b334a45a8ff 97
bogdanm 0:9b334a45a8ff 98 #endif