Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32L1/sleep.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 *******************************************************************************
<> 144:ef7eb2e8f9f7 3 * Copyright (c) 2014, STMicroelectronics
<> 144:ef7eb2e8f9f7 4 * All rights reserved.
<> 144:ef7eb2e8f9f7 5 *
<> 144:ef7eb2e8f9f7 6 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 7 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 10 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 12 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 13 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 15 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 16 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 17 *
<> 144:ef7eb2e8f9f7 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 28 *******************************************************************************
<> 144:ef7eb2e8f9f7 29 */
<> 144:ef7eb2e8f9f7 30 #include "sleep_api.h"
<> 144:ef7eb2e8f9f7 31 #include "hal_tick.h"
<> 144:ef7eb2e8f9f7 32
<> 144:ef7eb2e8f9f7 33 #if DEVICE_SLEEP
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 static TIM_HandleTypeDef TimMasterHandle;
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 void sleep(void) {
<> 144:ef7eb2e8f9f7 40 // Stop HAL systick
<> 144:ef7eb2e8f9f7 41 HAL_SuspendTick();
<> 144:ef7eb2e8f9f7 42 // Request to enter SLEEP mode
<> 144:ef7eb2e8f9f7 43 HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
<> 144:ef7eb2e8f9f7 44 // Restart HAL systick
<> 144:ef7eb2e8f9f7 45 HAL_ResumeTick();
<> 144:ef7eb2e8f9f7 46 }
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48
<> 144:ef7eb2e8f9f7 49 void deepsleep(void)
<> 144:ef7eb2e8f9f7 50 {
<> 144:ef7eb2e8f9f7 51 #if defined(TARGET_MOTE_L152RC)
<> 144:ef7eb2e8f9f7 52 int8_t STOPEntry = PWR_STOPENTRY_WFI;
<> 144:ef7eb2e8f9f7 53 #endif
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 // Stop HAL systick
<> 144:ef7eb2e8f9f7 56 TimMasterHandle.Instance = TIM_MST;
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 #if defined(TARGET_MOTE_L152RC)
<> 144:ef7eb2e8f9f7 59 /* Select the regulator state in Stop mode: Set PDDS and LPSDSR bit according to PWR_Regulator value */
<> 144:ef7eb2e8f9f7 60 MODIFY_REG(PWR->CR, (PWR_CR_PDDS | PWR_CR_LPSDSR), PWR_LOWPOWERREGULATOR_ON);
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 /* Set SLEEPDEEP bit of Cortex System Control Register */
<> 144:ef7eb2e8f9f7 63 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 /* Select Stop mode entry --------------------------------------------------*/
<> 144:ef7eb2e8f9f7 66 if(STOPEntry == PWR_STOPENTRY_WFI)
<> 144:ef7eb2e8f9f7 67 {
<> 144:ef7eb2e8f9f7 68 /* Request Wait For Interrupt */
<> 144:ef7eb2e8f9f7 69 __WFI();
<> 144:ef7eb2e8f9f7 70 }
<> 144:ef7eb2e8f9f7 71 else
<> 144:ef7eb2e8f9f7 72 {
<> 144:ef7eb2e8f9f7 73 /* Request Wait For Event */
<> 144:ef7eb2e8f9f7 74 __SEV();
<> 144:ef7eb2e8f9f7 75 __WFE();
<> 144:ef7eb2e8f9f7 76 __WFE();
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78 __NOP();
<> 144:ef7eb2e8f9f7 79 __NOP();
<> 144:ef7eb2e8f9f7 80 __NOP();
<> 144:ef7eb2e8f9f7 81 /* Reset SLEEPDEEP bit of Cortex System Control Register */
<> 144:ef7eb2e8f9f7 82 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
<> 144:ef7eb2e8f9f7 83 #else
<> 144:ef7eb2e8f9f7 84 // Request to enter STOP mode with regulator in low power mode
<> 144:ef7eb2e8f9f7 85 HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
<> 144:ef7eb2e8f9f7 86 #endif
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 // After wake-up from STOP reconfigure the PLL
<> 144:ef7eb2e8f9f7 89 SetSysClock();
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 // Restart HAL systick
<> 144:ef7eb2e8f9f7 92 HAL_ResumeTick();
<> 144:ef7eb2e8f9f7 93 }
<> 144:ef7eb2e8f9f7 94
<> 144:ef7eb2e8f9f7 95 #endif