Aravind Vadali / mbed-src-AV

mbed.h library with any bug fixes AV finds.

Dependents:   micromouse4_encoder_testing PID_Test Lab1_Test WorkingPID ... more

targets/hal/TARGET_STM/TARGET_STM32L1/sleep.c@1:ebce2ad32f95, 2015-11-02 (annotated)

Committer:
aravindsv
Date:
Mon Nov 02 03:07:12 2015 +0000
Revision:
1:ebce2ad32f95
Parent:
0:ba7650f404af 
Changed the RCC timeout value to 500 ms, so total code startup time before program starts running is ~1s. Hopefully no side-effects from lower startup timeouts

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aravindsv 0:ba7650f404af 1 /* mbed Microcontroller Library
aravindsv 0:ba7650f404af 2 *******************************************************************************
aravindsv 0:ba7650f404af 3 * Copyright (c) 2014, STMicroelectronics
aravindsv 0:ba7650f404af 4 * All rights reserved.
aravindsv 0:ba7650f404af 5 *
aravindsv 0:ba7650f404af 6 * Redistribution and use in source and binary forms, with or without
aravindsv 0:ba7650f404af 7 * modification, are permitted provided that the following conditions are met:
aravindsv 0:ba7650f404af 8 *
aravindsv 0:ba7650f404af 9 * 1. Redistributions of source code must retain the above copyright notice,
aravindsv 0:ba7650f404af 10 * this list of conditions and the following disclaimer.
aravindsv 0:ba7650f404af 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
aravindsv 0:ba7650f404af 12 * this list of conditions and the following disclaimer in the documentation
aravindsv 0:ba7650f404af 13 * and/or other materials provided with the distribution.
aravindsv 0:ba7650f404af 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
aravindsv 0:ba7650f404af 15 * may be used to endorse or promote products derived from this software
aravindsv 0:ba7650f404af 16 * without specific prior written permission.
aravindsv 0:ba7650f404af 17 *
aravindsv 0:ba7650f404af 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
aravindsv 0:ba7650f404af 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
aravindsv 0:ba7650f404af 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
aravindsv 0:ba7650f404af 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
aravindsv 0:ba7650f404af 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
aravindsv 0:ba7650f404af 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
aravindsv 0:ba7650f404af 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
aravindsv 0:ba7650f404af 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
aravindsv 0:ba7650f404af 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
aravindsv 0:ba7650f404af 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
aravindsv 0:ba7650f404af 28 *******************************************************************************
aravindsv 0:ba7650f404af 29 */
aravindsv 0:ba7650f404af 30 #include "sleep_api.h"
aravindsv 0:ba7650f404af 31
aravindsv 0:ba7650f404af 32 #if DEVICE_SLEEP
aravindsv 0:ba7650f404af 33
aravindsv 0:ba7650f404af 34 #include "cmsis.h"
aravindsv 0:ba7650f404af 35
aravindsv 0:ba7650f404af 36 static TIM_HandleTypeDef TimMasterHandle;
aravindsv 0:ba7650f404af 37
aravindsv 0:ba7650f404af 38 void sleep(void)
aravindsv 0:ba7650f404af 39 {
aravindsv 0:ba7650f404af 40 // Disable HAL tick interrupt
aravindsv 0:ba7650f404af 41 TimMasterHandle.Instance = TIM5;
aravindsv 0:ba7650f404af 42 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
aravindsv 0:ba7650f404af 43
aravindsv 0:ba7650f404af 44 // Request to enter SLEEP mode
aravindsv 0:ba7650f404af 45 HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
aravindsv 0:ba7650f404af 46
aravindsv 0:ba7650f404af 47 // Enable HAL tick interrupt
aravindsv 0:ba7650f404af 48 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
aravindsv 0:ba7650f404af 49 }
aravindsv 0:ba7650f404af 50
aravindsv 0:ba7650f404af 51 void deepsleep(void)
aravindsv 0:ba7650f404af 52 {
aravindsv 0:ba7650f404af 53 #if defined(TARGET_MOTE_L152RC)
aravindsv 0:ba7650f404af 54 int8_t STOPEntry = PWR_STOPENTRY_WFI;
aravindsv 0:ba7650f404af 55 #endif
aravindsv 0:ba7650f404af 56
aravindsv 0:ba7650f404af 57 // Disable HAL tick interrupt
aravindsv 0:ba7650f404af 58 TimMasterHandle.Instance = TIM5;
aravindsv 0:ba7650f404af 59 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
aravindsv 0:ba7650f404af 60
aravindsv 0:ba7650f404af 61 #if defined(TARGET_MOTE_L152RC)
aravindsv 0:ba7650f404af 62 /* Select the regulator state in Stop mode: Set PDDS and LPSDSR bit according to PWR_Regulator value */
aravindsv 0:ba7650f404af 63 MODIFY_REG(PWR->CR, (PWR_CR_PDDS | PWR_CR_LPSDSR), PWR_LOWPOWERREGULATOR_ON);
aravindsv 0:ba7650f404af 64
aravindsv 0:ba7650f404af 65 /* Set SLEEPDEEP bit of Cortex System Control Register */
aravindsv 0:ba7650f404af 66 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
aravindsv 0:ba7650f404af 67
aravindsv 0:ba7650f404af 68 /* Select Stop mode entry --------------------------------------------------*/
aravindsv 0:ba7650f404af 69 if(STOPEntry == PWR_STOPENTRY_WFI)
aravindsv 0:ba7650f404af 70 {
aravindsv 0:ba7650f404af 71 /* Request Wait For Interrupt */
aravindsv 0:ba7650f404af 72 __WFI();
aravindsv 0:ba7650f404af 73 }
aravindsv 0:ba7650f404af 74 else
aravindsv 0:ba7650f404af 75 {
aravindsv 0:ba7650f404af 76 /* Request Wait For Event */
aravindsv 0:ba7650f404af 77 __SEV();
aravindsv 0:ba7650f404af 78 __WFE();
aravindsv 0:ba7650f404af 79 __WFE();
aravindsv 0:ba7650f404af 80 }
aravindsv 0:ba7650f404af 81 __NOP();
aravindsv 0:ba7650f404af 82 __NOP();
aravindsv 0:ba7650f404af 83 __NOP();
aravindsv 0:ba7650f404af 84 /* Reset SLEEPDEEP bit of Cortex System Control Register */
aravindsv 0:ba7650f404af 85 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
aravindsv 0:ba7650f404af 86 #else
aravindsv 0:ba7650f404af 87 // Request to enter STOP mode with regulator in low power mode
aravindsv 0:ba7650f404af 88 HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
aravindsv 0:ba7650f404af 89 #endif
aravindsv 0:ba7650f404af 90
aravindsv 0:ba7650f404af 91 // After wake-up from STOP reconfigure the PLL
aravindsv 0:ba7650f404af 92 SetSysClock();
aravindsv 0:ba7650f404af 93
aravindsv 0:ba7650f404af 94 // Enable HAL tick interrupt
aravindsv 0:ba7650f404af 95 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
aravindsv 0:ba7650f404af 96 }
aravindsv 0:ba7650f404af 97
aravindsv 0:ba7650f404af 98 #endif