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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/sleep.c@84:f54042cbc282, 2014-02-03 (annotated)

Committer:
mbed_official
Date:
Mon Feb 03 09:30:05 2014 +0000
Revision:
84:f54042cbc282
Parent:
80:66393a7b209d
Child:
100:0412b5443284
Synchronized with git revision bbbd8699601c42149ccf0c37bc42bb6856ccc4c6



Full URL: https://github.com/mbedmicro/mbed/commit/bbbd8699601c42149ccf0c37bc42bb6856ccc4c6/



[NUCLEO_L152RE/F030_R8] SPI, I2C, Ticker, PWM updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 76:aeb1df146756 30 #include "sleep_api.h"
mbed_official 76:aeb1df146756 31 #include "cmsis.h"
mbed_official 76:aeb1df146756 32
mbed_official 80:66393a7b209d 33 static void SetSysClock_HSI(void)
mbed_official 80:66393a7b209d 34 {
mbed_official 80:66393a7b209d 35 __IO uint32_t StartUpCounter = 0, HSIStatus = 0;
mbed_official 80:66393a7b209d 36
mbed_official 80:66393a7b209d 37 /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/
mbed_official 80:66393a7b209d 38 /* Enable HSI */
mbed_official 80:66393a7b209d 39 RCC->CR |= ((uint32_t)RCC_CR_HSION);
mbed_official 80:66393a7b209d 40
mbed_official 80:66393a7b209d 41 /* Wait till HSI is ready and if Time out is reached exit */
mbed_official 80:66393a7b209d 42 do
mbed_official 80:66393a7b209d 43 {
mbed_official 80:66393a7b209d 44 HSIStatus = RCC->CR & RCC_CR_HSIRDY;
mbed_official 80:66393a7b209d 45 } while((HSIStatus == 0) && (StartUpCounter != HSI_STARTUP_TIMEOUT));
mbed_official 80:66393a7b209d 46
mbed_official 80:66393a7b209d 47 if ((RCC->CR & RCC_CR_HSIRDY) != RESET)
mbed_official 80:66393a7b209d 48 {
mbed_official 80:66393a7b209d 49 HSIStatus = (uint32_t)0x01;
mbed_official 80:66393a7b209d 50 }
mbed_official 80:66393a7b209d 51 else
mbed_official 80:66393a7b209d 52 {
mbed_official 80:66393a7b209d 53 HSIStatus = (uint32_t)0x00;
mbed_official 80:66393a7b209d 54 }
mbed_official 80:66393a7b209d 55
mbed_official 80:66393a7b209d 56 if (HSIStatus == (uint32_t)0x01)
mbed_official 80:66393a7b209d 57 {
mbed_official 80:66393a7b209d 58 /* Flash 0 wait state */
mbed_official 80:66393a7b209d 59 FLASH->ACR &= ~FLASH_ACR_LATENCY;
mbed_official 80:66393a7b209d 60
mbed_official 80:66393a7b209d 61 /* Disable Prefetch Buffer */
mbed_official 80:66393a7b209d 62 FLASH->ACR &= ~FLASH_ACR_PRFTEN;
mbed_official 80:66393a7b209d 63
mbed_official 80:66393a7b209d 64 /* Disable 64-bit access */
mbed_official 80:66393a7b209d 65 FLASH->ACR &= ~FLASH_ACR_ACC64;
mbed_official 80:66393a7b209d 66
mbed_official 80:66393a7b209d 67 /* Power enable */
mbed_official 80:66393a7b209d 68 RCC->APB1ENR |= RCC_APB1ENR_PWREN;
mbed_official 80:66393a7b209d 69
mbed_official 80:66393a7b209d 70 /* Select the Voltage Range 1 (1.8 V) */
mbed_official 80:66393a7b209d 71 PWR->CR = PWR_CR_VOS_0;
mbed_official 80:66393a7b209d 72
mbed_official 80:66393a7b209d 73 /* Wait Until the Voltage Regulator is ready */
mbed_official 80:66393a7b209d 74 while((PWR->CSR & PWR_CSR_VOSF) != RESET)
mbed_official 80:66393a7b209d 75 {
mbed_official 80:66393a7b209d 76 }
mbed_official 80:66393a7b209d 77
mbed_official 80:66393a7b209d 78 /* HCLK = SYSCLK /1*/
mbed_official 80:66393a7b209d 79 RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
mbed_official 80:66393a7b209d 80 /* PCLK2 = HCLK /1*/
mbed_official 80:66393a7b209d 81 RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
mbed_official 80:66393a7b209d 82
mbed_official 80:66393a7b209d 83 /* PCLK1 = HCLK /1*/
mbed_official 80:66393a7b209d 84 RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1;
mbed_official 80:66393a7b209d 85
mbed_official 80:66393a7b209d 86 /* Select HSI as system clock source */
mbed_official 80:66393a7b209d 87 RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
mbed_official 80:66393a7b209d 88 RCC->CFGR |= (uint32_t)RCC_CFGR_SW_HSI;
mbed_official 80:66393a7b209d 89
mbed_official 80:66393a7b209d 90 /* Wait till HSI is used as system clock source */
mbed_official 80:66393a7b209d 91 while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)RCC_CFGR_SWS_HSI)
mbed_official 80:66393a7b209d 92 {
mbed_official 80:66393a7b209d 93 }
mbed_official 80:66393a7b209d 94 }
mbed_official 80:66393a7b209d 95 else
mbed_official 80:66393a7b209d 96 {
mbed_official 80:66393a7b209d 97 /* If HSI fails to start-up, the application will have wrong clock
mbed_official 80:66393a7b209d 98 configuration. User can add here some code to deal with this error */
mbed_official 80:66393a7b209d 99 }
mbed_official 80:66393a7b209d 100 }
mbed_official 80:66393a7b209d 101
mbed_official 80:66393a7b209d 102 // MCU SLEEP mode
mbed_official 76:aeb1df146756 103 void sleep(void)
mbed_official 76:aeb1df146756 104 {
mbed_official 84:f54042cbc282 105 // Disable us_ticker update interrupt
mbed_official 84:f54042cbc282 106 TIM_ITConfig(TIM9, TIM_IT_Update, DISABLE);
mbed_official 84:f54042cbc282 107
mbed_official 80:66393a7b209d 108 // Enable PWR clock
mbed_official 80:66393a7b209d 109 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
mbed_official 84:f54042cbc282 110
mbed_official 80:66393a7b209d 111 // Request to enter SLEEP mode with regulator ON
mbed_official 84:f54042cbc282 112 PWR_EnterSleepMode(PWR_Regulator_ON, PWR_SLEEPEntry_WFI);
mbed_official 84:f54042cbc282 113
mbed_official 84:f54042cbc282 114 // Re-enable us_ticker update interrupt
mbed_official 84:f54042cbc282 115 TIM_ITConfig(TIM9, TIM_IT_Update, ENABLE);
mbed_official 76:aeb1df146756 116 }
mbed_official 76:aeb1df146756 117
mbed_official 80:66393a7b209d 118 // MCU STOP mode (Regulator in LP mode, LSI, HSI and HSE OFF)
mbed_official 76:aeb1df146756 119 void deepsleep(void)
mbed_official 76:aeb1df146756 120 {
mbed_official 76:aeb1df146756 121 // Enable PWR clock
mbed_official 76:aeb1df146756 122 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
mbed_official 76:aeb1df146756 123
mbed_official 80:66393a7b209d 124 // Enable Ultra low power mode
mbed_official 80:66393a7b209d 125 PWR_UltraLowPowerCmd(ENABLE);
mbed_official 80:66393a7b209d 126
mbed_official 80:66393a7b209d 127 // Enter Stop Mode
mbed_official 76:aeb1df146756 128 PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
mbed_official 80:66393a7b209d 129
mbed_official 80:66393a7b209d 130 // After wake-up from STOP reconfigure the system clock (HSI)
mbed_official 80:66393a7b209d 131 SetSysClock_HSI();
mbed_official 80:66393a7b209d 132
mbed_official 76:aeb1df146756 133 }