shao ziyang / mbed-src-kl05

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targets/cmsis/TARGET_STM/TARGET_DISCO_F303VC/stm32f30x_pwr.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
157:90e3acc479a2 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /**
mbed_official 157:90e3acc479a2 2 ******************************************************************************
mbed_official 157:90e3acc479a2 3 * @file stm32f30x_pwr.c
mbed_official 157:90e3acc479a2 4 * @author MCD Application Team
mbed_official 157:90e3acc479a2 5 * @version V1.1.0
mbed_official 157:90e3acc479a2 6 * @date 27-February-2014
mbed_official 157:90e3acc479a2 7 * @brief This file provides firmware functions to manage the following
mbed_official 157:90e3acc479a2 8 * functionalities of the Power Controller (PWR) peripheral:
mbed_official 157:90e3acc479a2 9 * + Backup Domain Access
mbed_official 157:90e3acc479a2 10 * + PVD configuration
mbed_official 157:90e3acc479a2 11 * + WakeUp pins configuration
mbed_official 157:90e3acc479a2 12 * + Low Power modes configuration
mbed_official 157:90e3acc479a2 13 * + Flags management
mbed_official 157:90e3acc479a2 14 *
mbed_official 157:90e3acc479a2 15 ******************************************************************************
mbed_official 157:90e3acc479a2 16 * @attention
mbed_official 157:90e3acc479a2 17 *
mbed_official 157:90e3acc479a2 18 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 157:90e3acc479a2 19 *
mbed_official 157:90e3acc479a2 20 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 157:90e3acc479a2 21 * are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 22 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 23 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 24 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 25 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 26 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 27 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 28 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 29 * without specific prior written permission.
mbed_official 157:90e3acc479a2 30 *
mbed_official 157:90e3acc479a2 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 32 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 34 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 39 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 40 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 41 *
mbed_official 157:90e3acc479a2 42 ******************************************************************************
mbed_official 157:90e3acc479a2 43 */
mbed_official 157:90e3acc479a2 44
mbed_official 157:90e3acc479a2 45 /* Includes ------------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 46 #include "stm32f30x_pwr.h"
mbed_official 157:90e3acc479a2 47 #include "stm32f30x_rcc.h"
mbed_official 157:90e3acc479a2 48
mbed_official 157:90e3acc479a2 49 /** @addtogroup STM32F30x_StdPeriph_Driver
mbed_official 157:90e3acc479a2 50 * @{
mbed_official 157:90e3acc479a2 51 */
mbed_official 157:90e3acc479a2 52
mbed_official 157:90e3acc479a2 53 /** @defgroup PWR
mbed_official 157:90e3acc479a2 54 * @brief PWR driver modules
mbed_official 157:90e3acc479a2 55 * @{
mbed_official 157:90e3acc479a2 56 */
mbed_official 157:90e3acc479a2 57
mbed_official 157:90e3acc479a2 58 /* Private typedef -----------------------------------------------------------*/
mbed_official 157:90e3acc479a2 59 /* Private define ------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 60 /* --------- PWR registers bit address in the alias region ---------- */
mbed_official 157:90e3acc479a2 61 #define PWR_OFFSET (PWR_BASE - PERIPH_BASE)
mbed_official 157:90e3acc479a2 62
mbed_official 157:90e3acc479a2 63 /* --- CR Register ---*/
mbed_official 157:90e3acc479a2 64
mbed_official 157:90e3acc479a2 65 /* Alias word address of DBP bit */
mbed_official 157:90e3acc479a2 66 #define CR_OFFSET (PWR_OFFSET + 0x00)
mbed_official 157:90e3acc479a2 67 #define DBP_BitNumber 0x08
mbed_official 157:90e3acc479a2 68 #define CR_DBP_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (DBP_BitNumber * 4))
mbed_official 157:90e3acc479a2 69
mbed_official 157:90e3acc479a2 70 /* Alias word address of PVDE bit */
mbed_official 157:90e3acc479a2 71 #define PVDE_BitNumber 0x04
mbed_official 157:90e3acc479a2 72 #define CR_PVDE_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PVDE_BitNumber * 4))
mbed_official 157:90e3acc479a2 73
mbed_official 157:90e3acc479a2 74 /* ------------------ PWR registers bit mask ------------------------ */
mbed_official 157:90e3acc479a2 75
mbed_official 157:90e3acc479a2 76 /* CR register bit mask */
mbed_official 157:90e3acc479a2 77 #define CR_DS_MASK ((uint32_t)0xFFFFFFFC)
mbed_official 157:90e3acc479a2 78 #define CR_PLS_MASK ((uint32_t)0xFFFFFF1F)
mbed_official 157:90e3acc479a2 79
mbed_official 157:90e3acc479a2 80 /* Private macro -------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 81 /* Private variables ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 82 /* Private function prototypes -----------------------------------------------*/
mbed_official 157:90e3acc479a2 83 /* Private functions ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 84
mbed_official 157:90e3acc479a2 85 /** @defgroup PWR_Private_Functions
mbed_official 157:90e3acc479a2 86 * @{
mbed_official 157:90e3acc479a2 87 */
mbed_official 157:90e3acc479a2 88
mbed_official 157:90e3acc479a2 89 /** @defgroup PWR_Group1 Backup Domain Access function
mbed_official 157:90e3acc479a2 90 * @brief Backup Domain Access function
mbed_official 157:90e3acc479a2 91 *
mbed_official 157:90e3acc479a2 92 @verbatim
mbed_official 157:90e3acc479a2 93 ==============================================================================
mbed_official 157:90e3acc479a2 94 ##### Backup Domain Access function #####
mbed_official 157:90e3acc479a2 95 ==============================================================================
mbed_official 157:90e3acc479a2 96
mbed_official 157:90e3acc479a2 97 [..] After reset, the Backup Domain Registers (RCC BDCR Register, RTC registers
mbed_official 157:90e3acc479a2 98 and RTC backup registers) are protected against possible stray write accesses.
mbed_official 157:90e3acc479a2 99 [..] To enable access to Backup domain use the PWR_BackupAccessCmd(ENABLE) function.
mbed_official 157:90e3acc479a2 100
mbed_official 157:90e3acc479a2 101 @endverbatim
mbed_official 157:90e3acc479a2 102 * @{
mbed_official 157:90e3acc479a2 103 */
mbed_official 157:90e3acc479a2 104
mbed_official 157:90e3acc479a2 105 /**
mbed_official 157:90e3acc479a2 106 * @brief Deinitializes the PWR peripheral registers to their default reset values.
mbed_official 157:90e3acc479a2 107 * @param None
mbed_official 157:90e3acc479a2 108 * @retval None
mbed_official 157:90e3acc479a2 109 */
mbed_official 157:90e3acc479a2 110 void PWR_DeInit(void)
mbed_official 157:90e3acc479a2 111 {
mbed_official 157:90e3acc479a2 112 RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, ENABLE);
mbed_official 157:90e3acc479a2 113 RCC_APB1PeriphResetCmd(RCC_APB1Periph_PWR, DISABLE);
mbed_official 157:90e3acc479a2 114 }
mbed_official 157:90e3acc479a2 115
mbed_official 157:90e3acc479a2 116 /**
mbed_official 157:90e3acc479a2 117 * @brief Enables or disables access to the RTC and backup registers.
mbed_official 157:90e3acc479a2 118 * @note If the HSE divided by 32 is used as the RTC clock, the
mbed_official 157:90e3acc479a2 119 * Backup Domain Access should be kept enabled.
mbed_official 157:90e3acc479a2 120 * @param NewState: new state of the access to the RTC and backup registers.
mbed_official 157:90e3acc479a2 121 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 122 * @retval None
mbed_official 157:90e3acc479a2 123 */
mbed_official 157:90e3acc479a2 124 void PWR_BackupAccessCmd(FunctionalState NewState)
mbed_official 157:90e3acc479a2 125 {
mbed_official 157:90e3acc479a2 126 /* Check the parameters */
mbed_official 157:90e3acc479a2 127 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 128 *(__IO uint32_t *) CR_DBP_BB = (uint32_t)NewState;
mbed_official 157:90e3acc479a2 129 }
mbed_official 157:90e3acc479a2 130
mbed_official 157:90e3acc479a2 131 /**
mbed_official 157:90e3acc479a2 132 * @}
mbed_official 157:90e3acc479a2 133 */
mbed_official 157:90e3acc479a2 134
mbed_official 157:90e3acc479a2 135 /** @defgroup PWR_Group2 PVD configuration functions
mbed_official 157:90e3acc479a2 136 * @brief PVD configuration functions
mbed_official 157:90e3acc479a2 137 *
mbed_official 157:90e3acc479a2 138 @verbatim
mbed_official 157:90e3acc479a2 139 ===============================================================================
mbed_official 157:90e3acc479a2 140 ##### PVD configuration functions #####
mbed_official 157:90e3acc479a2 141 ==============================================================================
mbed_official 157:90e3acc479a2 142 [..]
mbed_official 157:90e3acc479a2 143 (+) The PVD is used to monitor the VDD power supply by comparing it to a threshold
mbed_official 157:90e3acc479a2 144 selected by the PVD Level (PLS[2:0] bits in the PWR_CR).
mbed_official 157:90e3acc479a2 145 (+) A PVDO flag is available to indicate if VDD/VDDA is higher or lower than the
mbed_official 157:90e3acc479a2 146 PVD threshold. This event is internally connected to the EXTI line16
mbed_official 157:90e3acc479a2 147 and can generate an interrupt if enabled through the EXTI registers.
mbed_official 157:90e3acc479a2 148 (+) The PVD is stopped in Standby mode.
mbed_official 157:90e3acc479a2 149
mbed_official 157:90e3acc479a2 150 @endverbatim
mbed_official 157:90e3acc479a2 151 * @{
mbed_official 157:90e3acc479a2 152 */
mbed_official 157:90e3acc479a2 153
mbed_official 157:90e3acc479a2 154 /**
mbed_official 157:90e3acc479a2 155 * @brief Configures the voltage threshold detected by the Power Voltage Detector(PVD).
mbed_official 157:90e3acc479a2 156 * @param PWR_PVDLevel: specifies the PVD detection level
mbed_official 157:90e3acc479a2 157 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 158 * @arg PWR_PVDLevel_0: PVD detection level set to 2.18V
mbed_official 157:90e3acc479a2 159 * @arg PWR_PVDLevel_1: PVD detection level set to 2.28V
mbed_official 157:90e3acc479a2 160 * @arg PWR_PVDLevel_2: PVD detection level set to 2.38V
mbed_official 157:90e3acc479a2 161 * @arg PWR_PVDLevel_3: PVD detection level set to 2.48V
mbed_official 157:90e3acc479a2 162 * @arg PWR_PVDLevel_4: PVD detection level set to 2.58V
mbed_official 157:90e3acc479a2 163 * @arg PWR_PVDLevel_5: PVD detection level set to 2.68V
mbed_official 157:90e3acc479a2 164 * @arg PWR_PVDLevel_6: PVD detection level set to 2.78V
mbed_official 157:90e3acc479a2 165 * @arg PWR_PVDLevel_7: PVD detection level set to 2.88V
mbed_official 157:90e3acc479a2 166 * @retval None
mbed_official 157:90e3acc479a2 167 */
mbed_official 157:90e3acc479a2 168 void PWR_PVDLevelConfig(uint32_t PWR_PVDLevel)
mbed_official 157:90e3acc479a2 169 {
mbed_official 157:90e3acc479a2 170 uint32_t tmpreg = 0;
mbed_official 157:90e3acc479a2 171
mbed_official 157:90e3acc479a2 172 /* Check the parameters */
mbed_official 157:90e3acc479a2 173 assert_param(IS_PWR_PVD_LEVEL(PWR_PVDLevel));
mbed_official 157:90e3acc479a2 174
mbed_official 157:90e3acc479a2 175 tmpreg = PWR->CR;
mbed_official 157:90e3acc479a2 176
mbed_official 157:90e3acc479a2 177 /* Clear PLS[7:5] bits */
mbed_official 157:90e3acc479a2 178 tmpreg &= CR_PLS_MASK;
mbed_official 157:90e3acc479a2 179
mbed_official 157:90e3acc479a2 180 /* Set PLS[7:5] bits according to PWR_PVDLevel value */
mbed_official 157:90e3acc479a2 181 tmpreg |= PWR_PVDLevel;
mbed_official 157:90e3acc479a2 182
mbed_official 157:90e3acc479a2 183 /* Store the new value */
mbed_official 157:90e3acc479a2 184 PWR->CR = tmpreg;
mbed_official 157:90e3acc479a2 185 }
mbed_official 157:90e3acc479a2 186
mbed_official 157:90e3acc479a2 187 /**
mbed_official 157:90e3acc479a2 188 * @brief Enables or disables the Power Voltage Detector(PVD).
mbed_official 157:90e3acc479a2 189 * @param NewState: new state of the PVD.
mbed_official 157:90e3acc479a2 190 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 191 * @retval None
mbed_official 157:90e3acc479a2 192 */
mbed_official 157:90e3acc479a2 193 void PWR_PVDCmd(FunctionalState NewState)
mbed_official 157:90e3acc479a2 194 {
mbed_official 157:90e3acc479a2 195 /* Check the parameters */
mbed_official 157:90e3acc479a2 196 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 197 *(__IO uint32_t *) CR_PVDE_BB = (uint32_t)NewState;
mbed_official 157:90e3acc479a2 198 }
mbed_official 157:90e3acc479a2 199
mbed_official 157:90e3acc479a2 200 /**
mbed_official 157:90e3acc479a2 201 * @}
mbed_official 157:90e3acc479a2 202 */
mbed_official 157:90e3acc479a2 203
mbed_official 157:90e3acc479a2 204 /** @defgroup PWR_Group3 WakeUp pins configuration functions
mbed_official 157:90e3acc479a2 205 * @brief WakeUp pins configuration functions
mbed_official 157:90e3acc479a2 206 *
mbed_official 157:90e3acc479a2 207 @verbatim
mbed_official 157:90e3acc479a2 208 ===============================================================================
mbed_official 157:90e3acc479a2 209 ##### WakeUp pins configuration functions #####
mbed_official 157:90e3acc479a2 210 ===============================================================================
mbed_official 157:90e3acc479a2 211 [..]
mbed_official 157:90e3acc479a2 212 (+) WakeUp pins are used to wakeup the system from Standby mode. These pins are
mbed_official 157:90e3acc479a2 213 forced in input pull down configuration and are active on rising edges.
mbed_official 157:90e3acc479a2 214 (+) There are three WakeUp pins: WakeUp Pin 1 on PA.00, WakeUp Pin 2 on PC.13 and
mbed_official 157:90e3acc479a2 215 WakeUp Pin 3 on PE.06.
mbed_official 157:90e3acc479a2 216
mbed_official 157:90e3acc479a2 217 @endverbatim
mbed_official 157:90e3acc479a2 218 * @{
mbed_official 157:90e3acc479a2 219 */
mbed_official 157:90e3acc479a2 220
mbed_official 157:90e3acc479a2 221 /**
mbed_official 157:90e3acc479a2 222 * @brief Enables or disables the WakeUp Pin functionality.
mbed_official 157:90e3acc479a2 223 * @param PWR_WakeUpPin: specifies the WakeUpPin.
mbed_official 157:90e3acc479a2 224 * This parameter can be: PWR_WakeUpPin_1, PWR_WakeUpPin_2 or PWR_WakeUpPin_3.
mbed_official 157:90e3acc479a2 225 * @param NewState: new state of the WakeUp Pin functionality.
mbed_official 157:90e3acc479a2 226 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 227 * @retval None
mbed_official 157:90e3acc479a2 228 */
mbed_official 157:90e3acc479a2 229 void PWR_WakeUpPinCmd(uint32_t PWR_WakeUpPin, FunctionalState NewState)
mbed_official 157:90e3acc479a2 230 {
mbed_official 157:90e3acc479a2 231 /* Check the parameters */
mbed_official 157:90e3acc479a2 232 assert_param(IS_PWR_WAKEUP_PIN(PWR_WakeUpPin));
mbed_official 157:90e3acc479a2 233 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 234
mbed_official 157:90e3acc479a2 235 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 236 {
mbed_official 157:90e3acc479a2 237 /* Enable the EWUPx pin */
mbed_official 157:90e3acc479a2 238 PWR->CSR |= PWR_WakeUpPin;
mbed_official 157:90e3acc479a2 239 }
mbed_official 157:90e3acc479a2 240 else
mbed_official 157:90e3acc479a2 241 {
mbed_official 157:90e3acc479a2 242 /* Disable the EWUPx pin */
mbed_official 157:90e3acc479a2 243 PWR->CSR &= ~PWR_WakeUpPin;
mbed_official 157:90e3acc479a2 244 }
mbed_official 157:90e3acc479a2 245 }
mbed_official 157:90e3acc479a2 246
mbed_official 157:90e3acc479a2 247 /**
mbed_official 157:90e3acc479a2 248 * @}
mbed_official 157:90e3acc479a2 249 */
mbed_official 157:90e3acc479a2 250
mbed_official 157:90e3acc479a2 251
mbed_official 157:90e3acc479a2 252 /** @defgroup PWR_Group4 Low Power modes configuration functions
mbed_official 157:90e3acc479a2 253 * @brief Low Power modes configuration functions
mbed_official 157:90e3acc479a2 254 *
mbed_official 157:90e3acc479a2 255 @verbatim
mbed_official 157:90e3acc479a2 256 ===============================================================================
mbed_official 157:90e3acc479a2 257 ##### Low Power modes configuration functions #####
mbed_official 157:90e3acc479a2 258 ==============================================================================
mbed_official 157:90e3acc479a2 259
mbed_official 157:90e3acc479a2 260 [..] The devices feature three low-power modes:
mbed_official 157:90e3acc479a2 261 (+) Sleep mode: Cortex-M4 core stopped, peripherals kept running.
mbed_official 157:90e3acc479a2 262 (+) Stop mode: all clocks are stopped, regulator running, regulator in low power mode
mbed_official 157:90e3acc479a2 263 (+) Standby mode: VCORE domain powered off
mbed_official 157:90e3acc479a2 264
mbed_official 157:90e3acc479a2 265 *** Sleep mode ***
mbed_official 157:90e3acc479a2 266 ==================
mbed_official 157:90e3acc479a2 267 [..]
mbed_official 157:90e3acc479a2 268 (+) Entry:
mbed_official 157:90e3acc479a2 269 (++) The Sleep mode is entered by executing the WFE() or WFI() instructions.
mbed_official 157:90e3acc479a2 270 (+) Exit:
mbed_official 157:90e3acc479a2 271 (++) Any peripheral interrupt acknowledged by the nested vectored interrupt
mbed_official 157:90e3acc479a2 272 controller (NVIC) can wake up the device from Sleep mode.
mbed_official 157:90e3acc479a2 273
mbed_official 157:90e3acc479a2 274 *** Stop mode ***
mbed_official 157:90e3acc479a2 275 =================
mbed_official 157:90e3acc479a2 276 [..] In Stop mode, all clocks in the VCORE domain are stopped, the PLL, the HSI,
mbed_official 157:90e3acc479a2 277 and the HSE RC oscillators are disabled. Internal SRAM and register
mbed_official 157:90e3acc479a2 278 contents are preserved.
mbed_official 157:90e3acc479a2 279 The voltage regulator can be configured either in normal or low-power mode.
mbed_official 157:90e3acc479a2 280
mbed_official 157:90e3acc479a2 281 (+) Entry:
mbed_official 157:90e3acc479a2 282 (++) The Stop mode is entered using the PWR_EnterSTOPMode(PWR_Regulator_LowPower,)
mbed_official 157:90e3acc479a2 283 function with regulator in LowPower or with Regulator ON.
mbed_official 157:90e3acc479a2 284 (+) Exit:
mbed_official 157:90e3acc479a2 285 (++) Any EXTI Line (Internal or External) configured in Interrupt/Event mode
mbed_official 157:90e3acc479a2 286 or any internal IPs (I2C or UASRT) wakeup event.
mbed_official 157:90e3acc479a2 287
mbed_official 157:90e3acc479a2 288 *** Standby mode ***
mbed_official 157:90e3acc479a2 289 ====================
mbed_official 157:90e3acc479a2 290 [..] The Standby mode allows to achieve the lowest power consumption. It is based
mbed_official 157:90e3acc479a2 291 on the Cortex-M4 deepsleep mode, with the voltage regulator disabled.
mbed_official 157:90e3acc479a2 292 The VCORE domain is consequently powered off. The PLL, the HSI, and the HSE
mbed_official 157:90e3acc479a2 293 oscillator are also switched off. SRAM and register
mbed_official 157:90e3acc479a2 294 contents are lost except for the Backup domain (RTC registers, RTC backup
mbed_official 157:90e3acc479a2 295 registers and Standby circuitry).
mbed_official 157:90e3acc479a2 296
mbed_official 157:90e3acc479a2 297 [..] The voltage regulator is OFF.
mbed_official 157:90e3acc479a2 298
mbed_official 157:90e3acc479a2 299 (+) Entry:
mbed_official 157:90e3acc479a2 300 (++) The Standby mode is entered using the PWR_EnterSTANDBYMode() function.
mbed_official 157:90e3acc479a2 301 (+) Exit:
mbed_official 157:90e3acc479a2 302 (++) WKUP pin rising edge, RTC alarm (Alarm A and Alarm B), RTC wakeup,
mbed_official 157:90e3acc479a2 303 tamper event, time-stamp event, external reset in NRST pin, IWDG reset.
mbed_official 157:90e3acc479a2 304
mbed_official 157:90e3acc479a2 305 *** Auto-wakeup (AWU) from low-power mode ***
mbed_official 157:90e3acc479a2 306 =============================================
mbed_official 157:90e3acc479a2 307 [..] The MCU can be woken up from low-power mode by an RTC Alarm event, a tamper
mbed_official 157:90e3acc479a2 308 event, a time-stamp event, or a comparator event, without depending on an
mbed_official 157:90e3acc479a2 309 external interrupt (Auto-wakeup mode).
mbed_official 157:90e3acc479a2 310
mbed_official 157:90e3acc479a2 311 (+) RTC auto-wakeup (AWU) from the Stop mode
mbed_official 157:90e3acc479a2 312 (++) To wake up from the Stop mode with an RTC alarm event, it is necessary to:
mbed_official 157:90e3acc479a2 313 (+++) Configure the EXTI Line 17 to be sensitive to rising edges (Interrupt
mbed_official 157:90e3acc479a2 314 or Event modes) using the EXTI_Init() function.
mbed_official 157:90e3acc479a2 315 (+++) Enable the RTC Alarm Interrupt using the RTC_ITConfig() function
mbed_official 157:90e3acc479a2 316 (+++) Configure the RTC to generate the RTC alarm using the RTC_SetAlarm()
mbed_official 157:90e3acc479a2 317 and RTC_AlarmCmd() functions.
mbed_official 157:90e3acc479a2 318 (++) To wake up from the Stop mode with an RTC Tamper or time stamp event, it
mbed_official 157:90e3acc479a2 319 is necessary to:
mbed_official 157:90e3acc479a2 320 (+++) Configure the EXTI Line 19 to be sensitive to rising edges (Interrupt
mbed_official 157:90e3acc479a2 321 or Event modes) using the EXTI_Init() function.
mbed_official 157:90e3acc479a2 322 (+++) Enable the RTC Tamper or time stamp Interrupt using the RTC_ITConfig()
mbed_official 157:90e3acc479a2 323 function.
mbed_official 157:90e3acc479a2 324 (+++) Configure the RTC to detect the tamper or time stamp event using the
mbed_official 157:90e3acc479a2 325 RTC_TimeStampConfig(), RTC_TamperTriggerConfig() and RTC_TamperCmd()
mbed_official 157:90e3acc479a2 326 functions.
mbed_official 157:90e3acc479a2 327
mbed_official 157:90e3acc479a2 328 (+) RTC auto-wakeup (AWU) from the Standby mode
mbed_official 157:90e3acc479a2 329 (++) To wake up from the Standby mode with an RTC alarm event, it is necessary to:
mbed_official 157:90e3acc479a2 330 (+++) Enable the RTC Alarm Interrupt using the RTC_ITConfig() function.
mbed_official 157:90e3acc479a2 331 (+++) Configure the RTC to generate the RTC alarm using the RTC_SetAlarm()
mbed_official 157:90e3acc479a2 332 and RTC_AlarmCmd() functions.
mbed_official 157:90e3acc479a2 333 (++) To wake up from the Standby mode with an RTC Tamper or time stamp event, it
mbed_official 157:90e3acc479a2 334 is necessary to:
mbed_official 157:90e3acc479a2 335 (+++) Enable the RTC Tamper or time stamp Interrupt using the RTC_ITConfig()
mbed_official 157:90e3acc479a2 336 function.
mbed_official 157:90e3acc479a2 337 (+++) Configure the RTC to detect the tamper or time stamp event using the
mbed_official 157:90e3acc479a2 338 RTC_TimeStampConfig(), RTC_TamperTriggerConfig() and RTC_TamperCmd()
mbed_official 157:90e3acc479a2 339 functions.
mbed_official 157:90e3acc479a2 340
mbed_official 157:90e3acc479a2 341 (+) Comparator auto-wakeup (AWU) from the Stop mode
mbed_official 157:90e3acc479a2 342 (++) To wake up from the Stop mode with a comparator wakeup event, it is necessary to:
mbed_official 157:90e3acc479a2 343 (+++) Configure the correspondant comparator EXTI Line to be sensitive to
mbed_official 157:90e3acc479a2 344 the selected edges (falling, rising or falling and rising)
mbed_official 157:90e3acc479a2 345 (Interrupt or Event modes) using the EXTI_Init() function.
mbed_official 157:90e3acc479a2 346 (+++) Configure the comparator to generate the event.
mbed_official 157:90e3acc479a2 347
mbed_official 157:90e3acc479a2 348 @endverbatim
mbed_official 157:90e3acc479a2 349 * @{
mbed_official 157:90e3acc479a2 350 */
mbed_official 157:90e3acc479a2 351
mbed_official 157:90e3acc479a2 352 /**
mbed_official 157:90e3acc479a2 353 * @brief Enters Sleep mode.
mbed_official 157:90e3acc479a2 354 * @note In Sleep mode, all I/O pins keep the same state as in Run mode.
mbed_official 157:90e3acc479a2 355 * @param PWR_SLEEPEntry: specifies if SLEEP mode in entered with WFI or WFE instruction.
mbed_official 157:90e3acc479a2 356 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 357 * @arg PWR_SLEEPEntry_WFI: enter SLEEP mode with WFI instruction
mbed_official 157:90e3acc479a2 358 * @arg PWR_SLEEPEntry_WFE: enter SLEEP mode with WFE instruction
mbed_official 157:90e3acc479a2 359 * @retval None
mbed_official 157:90e3acc479a2 360 */
mbed_official 157:90e3acc479a2 361 void PWR_EnterSleepMode(uint8_t PWR_SLEEPEntry)
mbed_official 157:90e3acc479a2 362 {
mbed_official 157:90e3acc479a2 363 /* Check the parameters */
mbed_official 157:90e3acc479a2 364 assert_param(IS_PWR_SLEEP_ENTRY(PWR_SLEEPEntry));
mbed_official 157:90e3acc479a2 365
mbed_official 157:90e3acc479a2 366 /* Clear SLEEPDEEP bit of Cortex System Control Register */
mbed_official 157:90e3acc479a2 367 SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
mbed_official 157:90e3acc479a2 368
mbed_official 157:90e3acc479a2 369 /* Select SLEEP mode entry -------------------------------------------------*/
mbed_official 157:90e3acc479a2 370 if(PWR_SLEEPEntry == PWR_SLEEPEntry_WFI)
mbed_official 157:90e3acc479a2 371 {
mbed_official 157:90e3acc479a2 372 /* Request Wait For Interrupt */
mbed_official 157:90e3acc479a2 373 __WFI();
mbed_official 157:90e3acc479a2 374 }
mbed_official 157:90e3acc479a2 375 else
mbed_official 157:90e3acc479a2 376 {
mbed_official 157:90e3acc479a2 377 /* Request Wait For Event */
mbed_official 157:90e3acc479a2 378 __WFE();
mbed_official 157:90e3acc479a2 379 }
mbed_official 157:90e3acc479a2 380 }
mbed_official 157:90e3acc479a2 381
mbed_official 157:90e3acc479a2 382 /**
mbed_official 157:90e3acc479a2 383 * @brief Enters STOP mode.
mbed_official 157:90e3acc479a2 384 * @note In Stop mode, all I/O pins keep the same state as in Run mode.
mbed_official 157:90e3acc479a2 385 * @note When exiting Stop mode by issuing an interrupt or a wakeup event,
mbed_official 157:90e3acc479a2 386 * the HSI RC oscillator is selected as system clock.
mbed_official 157:90e3acc479a2 387 * @note When the voltage regulator operates in low power mode, an additional
mbed_official 157:90e3acc479a2 388 * startup delay is incurred when waking up from Stop mode.
mbed_official 157:90e3acc479a2 389 * By keeping the internal regulator ON during Stop mode, the consumption
mbed_official 157:90e3acc479a2 390 * is higher although the startup time is reduced.
mbed_official 157:90e3acc479a2 391 * @param PWR_Regulator: specifies the regulator state in STOP mode.
mbed_official 157:90e3acc479a2 392 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 393 * @arg PWR_Regulator_ON: STOP mode with regulator ON
mbed_official 157:90e3acc479a2 394 * @arg PWR_Regulator_LowPower: STOP mode with regulator in low power mode
mbed_official 157:90e3acc479a2 395 * @param PWR_STOPEntry: specifies if STOP mode in entered with WFI or WFE instruction.
mbed_official 157:90e3acc479a2 396 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 397 * @arg PWR_STOPEntry_WFI: enter STOP mode with WFI instruction
mbed_official 157:90e3acc479a2 398 * @arg PWR_STOPEntry_WFE: enter STOP mode with WFE instruction
mbed_official 157:90e3acc479a2 399 * @retval None
mbed_official 157:90e3acc479a2 400 */
mbed_official 157:90e3acc479a2 401 void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry)
mbed_official 157:90e3acc479a2 402 {
mbed_official 157:90e3acc479a2 403 uint32_t tmpreg = 0;
mbed_official 157:90e3acc479a2 404
mbed_official 157:90e3acc479a2 405 /* Check the parameters */
mbed_official 157:90e3acc479a2 406 assert_param(IS_PWR_REGULATOR(PWR_Regulator));
mbed_official 157:90e3acc479a2 407 assert_param(IS_PWR_STOP_ENTRY(PWR_STOPEntry));
mbed_official 157:90e3acc479a2 408
mbed_official 157:90e3acc479a2 409 /* Select the regulator state in STOP mode ---------------------------------*/
mbed_official 157:90e3acc479a2 410 tmpreg = PWR->CR;
mbed_official 157:90e3acc479a2 411 /* Clear PDDS and LPDSR bits */
mbed_official 157:90e3acc479a2 412 tmpreg &= CR_DS_MASK;
mbed_official 157:90e3acc479a2 413
mbed_official 157:90e3acc479a2 414 /* Set LPDSR bit according to PWR_Regulator value */
mbed_official 157:90e3acc479a2 415 tmpreg |= PWR_Regulator;
mbed_official 157:90e3acc479a2 416
mbed_official 157:90e3acc479a2 417 /* Store the new value */
mbed_official 157:90e3acc479a2 418 PWR->CR = tmpreg;
mbed_official 157:90e3acc479a2 419
mbed_official 157:90e3acc479a2 420 /* Set SLEEPDEEP bit of Cortex System Control Register */
mbed_official 157:90e3acc479a2 421 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
mbed_official 157:90e3acc479a2 422
mbed_official 157:90e3acc479a2 423 /* Select STOP mode entry --------------------------------------------------*/
mbed_official 157:90e3acc479a2 424 if(PWR_STOPEntry == PWR_STOPEntry_WFI)
mbed_official 157:90e3acc479a2 425 {
mbed_official 157:90e3acc479a2 426 /* Request Wait For Interrupt */
mbed_official 157:90e3acc479a2 427 __WFI();
mbed_official 157:90e3acc479a2 428 }
mbed_official 157:90e3acc479a2 429 else
mbed_official 157:90e3acc479a2 430 {
mbed_official 157:90e3acc479a2 431 /* Request Wait For Event */
mbed_official 157:90e3acc479a2 432 __WFE();
mbed_official 157:90e3acc479a2 433 }
mbed_official 157:90e3acc479a2 434 /* Reset SLEEPDEEP bit of Cortex System Control Register */
mbed_official 157:90e3acc479a2 435 SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
mbed_official 157:90e3acc479a2 436 }
mbed_official 157:90e3acc479a2 437
mbed_official 157:90e3acc479a2 438 /**
mbed_official 157:90e3acc479a2 439 * @brief Enters STANDBY mode.
mbed_official 157:90e3acc479a2 440 * @note In Standby mode, all I/O pins are high impedance except for:
mbed_official 157:90e3acc479a2 441 * @note Reset pad (still available)
mbed_official 157:90e3acc479a2 442 * @note RTC_AF1 pin (PC13) if configured for Wakeup pin 2 (WKUP2), tamper,
mbed_official 157:90e3acc479a2 443 * time-stamp, RTC Alarm out, or RTC clock calibration out.
mbed_official 157:90e3acc479a2 444 * @note WKUP pin 1 (PA0) and WKUP pin 3 (PE6), if enabled.
mbed_official 157:90e3acc479a2 445 * @param None
mbed_official 157:90e3acc479a2 446 * @retval None
mbed_official 157:90e3acc479a2 447 */
mbed_official 157:90e3acc479a2 448 void PWR_EnterSTANDBYMode(void)
mbed_official 157:90e3acc479a2 449 {
mbed_official 157:90e3acc479a2 450 /* Clear Wakeup flag */
mbed_official 157:90e3acc479a2 451 PWR->CR |= PWR_CR_CWUF;
mbed_official 157:90e3acc479a2 452
mbed_official 157:90e3acc479a2 453 /* Select STANDBY mode */
mbed_official 157:90e3acc479a2 454 PWR->CR |= PWR_CR_PDDS;
mbed_official 157:90e3acc479a2 455
mbed_official 157:90e3acc479a2 456 /* Set SLEEPDEEP bit of Cortex System Control Register */
mbed_official 157:90e3acc479a2 457 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
mbed_official 157:90e3acc479a2 458
mbed_official 157:90e3acc479a2 459 /* This option is used to ensure that store operations are completed */
mbed_official 157:90e3acc479a2 460 #if defined ( __CC_ARM )
mbed_official 157:90e3acc479a2 461 __force_stores();
mbed_official 157:90e3acc479a2 462 #endif
mbed_official 157:90e3acc479a2 463 /* Request Wait For Interrupt */
mbed_official 157:90e3acc479a2 464 __WFI();
mbed_official 157:90e3acc479a2 465 }
mbed_official 157:90e3acc479a2 466
mbed_official 157:90e3acc479a2 467 /**
mbed_official 157:90e3acc479a2 468 * @}
mbed_official 157:90e3acc479a2 469 */
mbed_official 157:90e3acc479a2 470
mbed_official 157:90e3acc479a2 471 /** @defgroup PWR_Group5 Flags management functions
mbed_official 157:90e3acc479a2 472 * @brief Flags management functions
mbed_official 157:90e3acc479a2 473 *
mbed_official 157:90e3acc479a2 474 @verbatim
mbed_official 157:90e3acc479a2 475 ===============================================================================
mbed_official 157:90e3acc479a2 476 ##### Flags management functions #####
mbed_official 157:90e3acc479a2 477 ===============================================================================
mbed_official 157:90e3acc479a2 478
mbed_official 157:90e3acc479a2 479 @endverbatim
mbed_official 157:90e3acc479a2 480 * @{
mbed_official 157:90e3acc479a2 481 */
mbed_official 157:90e3acc479a2 482
mbed_official 157:90e3acc479a2 483 /**
mbed_official 157:90e3acc479a2 484 * @brief Checks whether the specified PWR flag is set or not.
mbed_official 157:90e3acc479a2 485 * @param PWR_FLAG: specifies the flag to check.
mbed_official 157:90e3acc479a2 486 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 487 * @arg PWR_FLAG_WU: Wake Up flag. This flag indicates that a wakeup event
mbed_official 157:90e3acc479a2 488 * was received from the WKUP pin or from the RTC alarm (Alarm A or Alarm B),
mbed_official 157:90e3acc479a2 489 * RTC Tamper event, RTC TimeStamp event or RTC Wakeup.
mbed_official 157:90e3acc479a2 490 * @arg PWR_FLAG_SB: StandBy flag. This flag indicates that the system was
mbed_official 157:90e3acc479a2 491 * resumed from StandBy mode.
mbed_official 157:90e3acc479a2 492 * @arg PWR_FLAG_PVDO: PVD Output. This flag is valid only if PVD is enabled
mbed_official 157:90e3acc479a2 493 * by the PWR_PVDCmd() function.
mbed_official 157:90e3acc479a2 494 * @arg PWR_FLAG_VREFINTRDY: Internal Voltage Reference Ready flag. This
mbed_official 157:90e3acc479a2 495 * flag indicates the state of the internal voltage reference, VREFINT.
mbed_official 157:90e3acc479a2 496 * @retval The new state of PWR_FLAG (SET or RESET).
mbed_official 157:90e3acc479a2 497 */
mbed_official 157:90e3acc479a2 498 FlagStatus PWR_GetFlagStatus(uint32_t PWR_FLAG)
mbed_official 157:90e3acc479a2 499 {
mbed_official 157:90e3acc479a2 500 FlagStatus bitstatus = RESET;
mbed_official 157:90e3acc479a2 501 /* Check the parameters */
mbed_official 157:90e3acc479a2 502 assert_param(IS_PWR_GET_FLAG(PWR_FLAG));
mbed_official 157:90e3acc479a2 503
mbed_official 157:90e3acc479a2 504 if ((PWR->CSR & PWR_FLAG) != (uint32_t)RESET)
mbed_official 157:90e3acc479a2 505 {
mbed_official 157:90e3acc479a2 506 bitstatus = SET;
mbed_official 157:90e3acc479a2 507 }
mbed_official 157:90e3acc479a2 508 else
mbed_official 157:90e3acc479a2 509 {
mbed_official 157:90e3acc479a2 510 bitstatus = RESET;
mbed_official 157:90e3acc479a2 511 }
mbed_official 157:90e3acc479a2 512 /* Return the flag status */
mbed_official 157:90e3acc479a2 513 return bitstatus;
mbed_official 157:90e3acc479a2 514 }
mbed_official 157:90e3acc479a2 515
mbed_official 157:90e3acc479a2 516 /**
mbed_official 157:90e3acc479a2 517 * @brief Clears the PWR's pending flags.
mbed_official 157:90e3acc479a2 518 * @param PWR_FLAG: specifies the flag to clear.
mbed_official 157:90e3acc479a2 519 * This parameter can be one of the following values:
mbed_official 157:90e3acc479a2 520 * @arg PWR_FLAG_WU: Wake Up flag
mbed_official 157:90e3acc479a2 521 * @arg PWR_FLAG_SB: StandBy flag
mbed_official 157:90e3acc479a2 522 * @retval None
mbed_official 157:90e3acc479a2 523 */
mbed_official 157:90e3acc479a2 524 void PWR_ClearFlag(uint32_t PWR_FLAG)
mbed_official 157:90e3acc479a2 525 {
mbed_official 157:90e3acc479a2 526 /* Check the parameters */
mbed_official 157:90e3acc479a2 527 assert_param(IS_PWR_CLEAR_FLAG(PWR_FLAG));
mbed_official 157:90e3acc479a2 528
mbed_official 157:90e3acc479a2 529 PWR->CR |= PWR_FLAG << 2;
mbed_official 157:90e3acc479a2 530 }
mbed_official 157:90e3acc479a2 531
mbed_official 157:90e3acc479a2 532 /**
mbed_official 157:90e3acc479a2 533 * @}
mbed_official 157:90e3acc479a2 534 */
mbed_official 157:90e3acc479a2 535
mbed_official 157:90e3acc479a2 536 /**
mbed_official 157:90e3acc479a2 537 * @}
mbed_official 157:90e3acc479a2 538 */
mbed_official 157:90e3acc479a2 539
mbed_official 157:90e3acc479a2 540 /**
mbed_official 157:90e3acc479a2 541 * @}
mbed_official 157:90e3acc479a2 542 */
mbed_official 157:90e3acc479a2 543
mbed_official 157:90e3acc479a2 544 /**
mbed_official 157:90e3acc479a2 545 * @}
mbed_official 157:90e3acc479a2 546 */
mbed_official 157:90e3acc479a2 547
mbed_official 157:90e3acc479a2 548 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/