Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c (20744B)
1 /** 2 ****************************************************************************** 3 * @file stm32f1xx_hal_pwr.c 4 * @author MCD Application Team 5 * @brief PWR HAL module driver. 6 * 7 * This file provides firmware functions to manage the following 8 * functionalities of the Power Controller (PWR) peripheral: 9 * + Initialization/de-initialization functions 10 * + Peripheral Control functions 11 * 12 ****************************************************************************** 13 * @attention 14 * 15 * Copyright (c) 2016 STMicroelectronics. 16 * All rights reserved. 17 * 18 * This software is licensed under terms that can be found in the LICENSE file 19 * in the root directory of this software component. 20 * If no LICENSE file comes with this software, it is provided AS-IS. 21 * 22 ****************************************************************************** 23 */ 24 25 /* Includes ------------------------------------------------------------------*/ 26 #include "stm32f1xx_hal.h" 27 28 /** @addtogroup STM32F1xx_HAL_Driver 29 * @{ 30 */ 31 32 /** @defgroup PWR PWR 33 * @brief PWR HAL module driver 34 * @{ 35 */ 36 37 #ifdef HAL_PWR_MODULE_ENABLED 38 39 /* Private typedef -----------------------------------------------------------*/ 40 /* Private define ------------------------------------------------------------*/ 41 42 /** @defgroup PWR_Private_Constants PWR Private Constants 43 * @{ 44 */ 45 46 /** @defgroup PWR_PVD_Mode_Mask PWR PVD Mode Mask 47 * @{ 48 */ 49 #define PVD_MODE_IT 0x00010000U 50 #define PVD_MODE_EVT 0x00020000U 51 #define PVD_RISING_EDGE 0x00000001U 52 #define PVD_FALLING_EDGE 0x00000002U 53 /** 54 * @} 55 */ 56 57 58 /** @defgroup PWR_register_alias_address PWR Register alias address 59 * @{ 60 */ 61 /* ------------- PWR registers bit address in the alias region ---------------*/ 62 #define PWR_OFFSET (PWR_BASE - PERIPH_BASE) 63 #define PWR_CR_OFFSET 0x00U 64 #define PWR_CSR_OFFSET 0x04U 65 #define PWR_CR_OFFSET_BB (PWR_OFFSET + PWR_CR_OFFSET) 66 #define PWR_CSR_OFFSET_BB (PWR_OFFSET + PWR_CSR_OFFSET) 67 /** 68 * @} 69 */ 70 71 /** @defgroup PWR_CR_register_alias PWR CR Register alias address 72 * @{ 73 */ 74 /* --- CR Register ---*/ 75 /* Alias word address of LPSDSR bit */ 76 #define LPSDSR_BIT_NUMBER PWR_CR_LPDS_Pos 77 #define CR_LPSDSR_BB ((uint32_t)(PERIPH_BB_BASE + (PWR_CR_OFFSET_BB * 32U) + (LPSDSR_BIT_NUMBER * 4U))) 78 79 /* Alias word address of DBP bit */ 80 #define DBP_BIT_NUMBER PWR_CR_DBP_Pos 81 #define CR_DBP_BB ((uint32_t)(PERIPH_BB_BASE + (PWR_CR_OFFSET_BB * 32U) + (DBP_BIT_NUMBER * 4U))) 82 83 /* Alias word address of PVDE bit */ 84 #define PVDE_BIT_NUMBER PWR_CR_PVDE_Pos 85 #define CR_PVDE_BB ((uint32_t)(PERIPH_BB_BASE + (PWR_CR_OFFSET_BB * 32U) + (PVDE_BIT_NUMBER * 4U))) 86 87 /** 88 * @} 89 */ 90 91 /** @defgroup PWR_CSR_register_alias PWR CSR Register alias address 92 * @{ 93 */ 94 95 /* --- CSR Register ---*/ 96 /* Alias word address of EWUP1 bit */ 97 #define CSR_EWUP_BB(VAL) ((uint32_t)(PERIPH_BB_BASE + (PWR_CSR_OFFSET_BB * 32U) + (POSITION_VAL(VAL) * 4U))) 98 /** 99 * @} 100 */ 101 102 /** 103 * @} 104 */ 105 106 /* Private variables ---------------------------------------------------------*/ 107 /* Private function prototypes -----------------------------------------------*/ 108 /** @defgroup PWR_Private_Functions PWR Private Functions 109 * brief WFE cortex command overloaded for HAL_PWR_EnterSTOPMode usage only (see Workaround section) 110 * @{ 111 */ 112 static void PWR_OverloadWfe(void); 113 114 /* Private functions ---------------------------------------------------------*/ 115 __NOINLINE 116 static void PWR_OverloadWfe(void) 117 { 118 __asm volatile( "wfe" ); 119 __asm volatile( "nop" ); 120 } 121 122 /** 123 * @} 124 */ 125 126 127 /** @defgroup PWR_Exported_Functions PWR Exported Functions 128 * @{ 129 */ 130 131 /** @defgroup PWR_Exported_Functions_Group1 Initialization and de-initialization functions 132 * @brief Initialization and de-initialization functions 133 * 134 @verbatim 135 =============================================================================== 136 ##### Initialization and de-initialization functions ##### 137 =============================================================================== 138 [..] 139 After reset, the backup domain (RTC registers, RTC backup data 140 registers) is protected against possible unwanted 141 write accesses. 142 To enable access to the RTC Domain and RTC registers, proceed as follows: 143 (+) Enable the Power Controller (PWR) APB1 interface clock using the 144 __HAL_RCC_PWR_CLK_ENABLE() macro. 145 (+) Enable access to RTC domain using the HAL_PWR_EnableBkUpAccess() function. 146 147 @endverbatim 148 * @{ 149 */ 150 151 /** 152 * @brief Deinitializes the PWR peripheral registers to their default reset values. 153 * @retval None 154 */ 155 void HAL_PWR_DeInit(void) 156 { 157 __HAL_RCC_PWR_FORCE_RESET(); 158 __HAL_RCC_PWR_RELEASE_RESET(); 159 } 160 161 /** 162 * @brief Enables access to the backup domain (RTC registers, RTC 163 * backup data registers ). 164 * @note If the HSE divided by 128 is used as the RTC clock, the 165 * Backup Domain Access should be kept enabled. 166 * @retval None 167 */ 168 void HAL_PWR_EnableBkUpAccess(void) 169 { 170 /* Enable access to RTC and backup registers */ 171 *(__IO uint32_t *) CR_DBP_BB = (uint32_t)ENABLE; 172 } 173 174 /** 175 * @brief Disables access to the backup domain (RTC registers, RTC 176 * backup data registers). 177 * @note If the HSE divided by 128 is used as the RTC clock, the 178 * Backup Domain Access should be kept enabled. 179 * @retval None 180 */ 181 void HAL_PWR_DisableBkUpAccess(void) 182 { 183 /* Disable access to RTC and backup registers */ 184 *(__IO uint32_t *) CR_DBP_BB = (uint32_t)DISABLE; 185 } 186 187 /** 188 * @} 189 */ 190 191 /** @defgroup PWR_Exported_Functions_Group2 Peripheral Control functions 192 * @brief Low Power modes configuration functions 193 * 194 @verbatim 195 =============================================================================== 196 ##### Peripheral Control functions ##### 197 =============================================================================== 198 199 *** PVD configuration *** 200 ========================= 201 [..] 202 (+) The PVD is used to monitor the VDD power supply by comparing it to a 203 threshold selected by the PVD Level (PLS[2:0] bits in the PWR_CR). 204 205 (+) A PVDO flag is available to indicate if VDD/VDDA is higher or lower 206 than the PVD threshold. This event is internally connected to the EXTI 207 line16 and can generate an interrupt if enabled. This is done through 208 __HAL_PVD_EXTI_ENABLE_IT() macro. 209 (+) The PVD is stopped in Standby mode. 210 211 *** WakeUp pin configuration *** 212 ================================ 213 [..] 214 (+) WakeUp pin is used to wake up the system from Standby mode. This pin is 215 forced in input pull-down configuration and is active on rising edges. 216 (+) There is one WakeUp pin: 217 WakeUp Pin 1 on PA.00. 218 219 [..] 220 221 *** Low Power modes configuration *** 222 ===================================== 223 [..] 224 The device features 3 low-power modes: 225 (+) Sleep mode: CPU clock off, all peripherals including Cortex-M3 core peripherals like 226 NVIC, SysTick, etc. are kept running 227 (+) Stop mode: All clocks are stopped 228 (+) Standby mode: 1.8V domain powered off 229 230 231 *** Sleep mode *** 232 ================== 233 [..] 234 (+) Entry: 235 The Sleep mode is entered by using the HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFx) 236 functions with 237 (++) PWR_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction 238 (++) PWR_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction 239 240 (+) Exit: 241 (++) WFI entry mode, Any peripheral interrupt acknowledged by the nested vectored interrupt 242 controller (NVIC) can wake up the device from Sleep mode. 243 (++) WFE entry mode, Any wakeup event can wake up the device from Sleep mode. 244 (+++) Any peripheral interrupt w/o NVIC configuration & SEVONPEND bit set in the Cortex (HAL_PWR_EnableSEVOnPend) 245 (+++) Any EXTI Line (Internal or External) configured in Event mode 246 247 *** Stop mode *** 248 ================= 249 [..] 250 The Stop mode is based on the Cortex-M3 deepsleep mode combined with peripheral 251 clock gating. The voltage regulator can be configured either in normal or low-power mode. 252 In Stop mode, all clocks in the 1.8 V domain are stopped, the PLL, the HSI and the HSE RC 253 oscillators are disabled. SRAM and register contents are preserved. 254 In Stop mode, all I/O pins keep the same state as in Run mode. 255 256 (+) Entry: 257 The Stop mode is entered using the HAL_PWR_EnterSTOPMode(PWR_REGULATOR_VALUE, PWR_SLEEPENTRY_WFx ) 258 function with: 259 (++) PWR_REGULATOR_VALUE= PWR_MAINREGULATOR_ON: Main regulator ON. 260 (++) PWR_REGULATOR_VALUE= PWR_LOWPOWERREGULATOR_ON: Low Power regulator ON. 261 (++) PWR_SLEEPENTRY_WFx= PWR_SLEEPENTRY_WFI: enter STOP mode with WFI instruction 262 (++) PWR_SLEEPENTRY_WFx= PWR_SLEEPENTRY_WFE: enter STOP mode with WFE instruction 263 (+) Exit: 264 (++) WFI entry mode, Any EXTI Line (Internal or External) configured in Interrupt mode with NVIC configured 265 (++) WFE entry mode, Any EXTI Line (Internal or External) configured in Event mode. 266 267 *** Standby mode *** 268 ==================== 269 [..] 270 The Standby mode allows to achieve the lowest power consumption. It is based on the 271 Cortex-M3 deepsleep mode, with the voltage regulator disabled. The 1.8 V domain is 272 consequently powered off. The PLL, the HSI oscillator and the HSE oscillator are also 273 switched off. SRAM and register contents are lost except for registers in the Backup domain 274 and Standby circuitry 275 276 (+) Entry: 277 (++) The Standby mode is entered using the HAL_PWR_EnterSTANDBYMode() function. 278 (+) Exit: 279 (++) WKUP pin rising edge, RTC alarm event rising edge, external Reset in 280 NRSTpin, IWDG Reset 281 282 *** Auto-wakeup (AWU) from low-power mode *** 283 ============================================= 284 [..] 285 286 (+) The MCU can be woken up from low-power mode by an RTC Alarm event, 287 without depending on an external interrupt (Auto-wakeup mode). 288 289 (+) RTC auto-wakeup (AWU) from the Stop and Standby modes 290 291 (++) To wake up from the Stop mode with an RTC alarm event, it is necessary to 292 configure the RTC to generate the RTC alarm using the HAL_RTC_SetAlarm_IT() function. 293 294 *** PWR Workarounds linked to Silicon Limitation *** 295 ==================================================== 296 [..] 297 Below the list of all silicon limitations known on STM32F1xx prouct. 298 299 (#)Workarounds Implemented inside PWR HAL Driver 300 (##)Debugging Stop mode with WFE entry - overloaded the WFE by an internal function 301 302 @endverbatim 303 * @{ 304 */ 305 306 /** 307 * @brief Configures the voltage threshold detected by the Power Voltage Detector(PVD). 308 * @param sConfigPVD: pointer to an PWR_PVDTypeDef structure that contains the configuration 309 * information for the PVD. 310 * @note Refer to the electrical characteristics of your device datasheet for 311 * more details about the voltage threshold corresponding to each 312 * detection level. 313 * @retval None 314 */ 315 void HAL_PWR_ConfigPVD(PWR_PVDTypeDef *sConfigPVD) 316 { 317 /* Check the parameters */ 318 assert_param(IS_PWR_PVD_LEVEL(sConfigPVD->PVDLevel)); 319 assert_param(IS_PWR_PVD_MODE(sConfigPVD->Mode)); 320 321 /* Set PLS[7:5] bits according to PVDLevel value */ 322 MODIFY_REG(PWR->CR, PWR_CR_PLS, sConfigPVD->PVDLevel); 323 324 /* Clear any previous config. Keep it clear if no event or IT mode is selected */ 325 __HAL_PWR_PVD_EXTI_DISABLE_EVENT(); 326 __HAL_PWR_PVD_EXTI_DISABLE_IT(); 327 __HAL_PWR_PVD_EXTI_DISABLE_FALLING_EDGE(); 328 __HAL_PWR_PVD_EXTI_DISABLE_RISING_EDGE(); 329 330 /* Configure interrupt mode */ 331 if((sConfigPVD->Mode & PVD_MODE_IT) == PVD_MODE_IT) 332 { 333 __HAL_PWR_PVD_EXTI_ENABLE_IT(); 334 } 335 336 /* Configure event mode */ 337 if((sConfigPVD->Mode & PVD_MODE_EVT) == PVD_MODE_EVT) 338 { 339 __HAL_PWR_PVD_EXTI_ENABLE_EVENT(); 340 } 341 342 /* Configure the edge */ 343 if((sConfigPVD->Mode & PVD_RISING_EDGE) == PVD_RISING_EDGE) 344 { 345 __HAL_PWR_PVD_EXTI_ENABLE_RISING_EDGE(); 346 } 347 348 if((sConfigPVD->Mode & PVD_FALLING_EDGE) == PVD_FALLING_EDGE) 349 { 350 __HAL_PWR_PVD_EXTI_ENABLE_FALLING_EDGE(); 351 } 352 } 353 354 /** 355 * @brief Enables the Power Voltage Detector(PVD). 356 * @retval None 357 */ 358 void HAL_PWR_EnablePVD(void) 359 { 360 /* Enable the power voltage detector */ 361 *(__IO uint32_t *) CR_PVDE_BB = (uint32_t)ENABLE; 362 } 363 364 /** 365 * @brief Disables the Power Voltage Detector(PVD). 366 * @retval None 367 */ 368 void HAL_PWR_DisablePVD(void) 369 { 370 /* Disable the power voltage detector */ 371 *(__IO uint32_t *) CR_PVDE_BB = (uint32_t)DISABLE; 372 } 373 374 /** 375 * @brief Enables the WakeUp PINx functionality. 376 * @param WakeUpPinx: Specifies the Power Wake-Up pin to enable. 377 * This parameter can be one of the following values: 378 * @arg PWR_WAKEUP_PIN1 379 * @retval None 380 */ 381 void HAL_PWR_EnableWakeUpPin(uint32_t WakeUpPinx) 382 { 383 /* Check the parameter */ 384 assert_param(IS_PWR_WAKEUP_PIN(WakeUpPinx)); 385 /* Enable the EWUPx pin */ 386 *(__IO uint32_t *) CSR_EWUP_BB(WakeUpPinx) = (uint32_t)ENABLE; 387 } 388 389 /** 390 * @brief Disables the WakeUp PINx functionality. 391 * @param WakeUpPinx: Specifies the Power Wake-Up pin to disable. 392 * This parameter can be one of the following values: 393 * @arg PWR_WAKEUP_PIN1 394 * @retval None 395 */ 396 void HAL_PWR_DisableWakeUpPin(uint32_t WakeUpPinx) 397 { 398 /* Check the parameter */ 399 assert_param(IS_PWR_WAKEUP_PIN(WakeUpPinx)); 400 /* Disable the EWUPx pin */ 401 *(__IO uint32_t *) CSR_EWUP_BB(WakeUpPinx) = (uint32_t)DISABLE; 402 } 403 404 /** 405 * @brief Enters Sleep mode. 406 * @note In Sleep mode, all I/O pins keep the same state as in Run mode. 407 * @param Regulator: Regulator state as no effect in SLEEP mode - allows to support portability from legacy software 408 * @param SLEEPEntry: Specifies if SLEEP mode is entered with WFI or WFE instruction. 409 * When WFI entry is used, tick interrupt have to be disabled if not desired as 410 * the interrupt wake up source. 411 * This parameter can be one of the following values: 412 * @arg PWR_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction 413 * @arg PWR_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction 414 * @retval None 415 */ 416 void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry) 417 { 418 /* Check the parameters */ 419 /* No check on Regulator because parameter not used in SLEEP mode */ 420 /* Prevent unused argument(s) compilation warning */ 421 UNUSED(Regulator); 422 423 assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry)); 424 425 /* Clear SLEEPDEEP bit of Cortex System Control Register */ 426 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk)); 427 428 /* Select SLEEP mode entry -------------------------------------------------*/ 429 if(SLEEPEntry == PWR_SLEEPENTRY_WFI) 430 { 431 /* Request Wait For Interrupt */ 432 __WFI(); 433 } 434 else 435 { 436 /* Request Wait For Event */ 437 __SEV(); 438 __WFE(); 439 __WFE(); 440 } 441 } 442 443 /** 444 * @brief Enters Stop mode. 445 * @note In Stop mode, all I/O pins keep the same state as in Run mode. 446 * @note When exiting Stop mode by using an interrupt or a wakeup event, 447 * HSI RC oscillator is selected as system clock. 448 * @note When the voltage regulator operates in low power mode, an additional 449 * startup delay is incurred when waking up from Stop mode. 450 * By keeping the internal regulator ON during Stop mode, the consumption 451 * is higher although the startup time is reduced. 452 * @param Regulator: Specifies the regulator state in Stop mode. 453 * This parameter can be one of the following values: 454 * @arg PWR_MAINREGULATOR_ON: Stop mode with regulator ON 455 * @arg PWR_LOWPOWERREGULATOR_ON: Stop mode with low power regulator ON 456 * @param STOPEntry: Specifies if Stop mode in entered with WFI or WFE instruction. 457 * This parameter can be one of the following values: 458 * @arg PWR_STOPENTRY_WFI: Enter Stop mode with WFI instruction 459 * @arg PWR_STOPENTRY_WFE: Enter Stop mode with WFE instruction 460 * @retval None 461 */ 462 void HAL_PWR_EnterSTOPMode(uint32_t Regulator, uint8_t STOPEntry) 463 { 464 /* Check the parameters */ 465 assert_param(IS_PWR_REGULATOR(Regulator)); 466 assert_param(IS_PWR_STOP_ENTRY(STOPEntry)); 467 468 /* Clear PDDS bit in PWR register to specify entering in STOP mode when CPU enter in Deepsleep */ 469 CLEAR_BIT(PWR->CR, PWR_CR_PDDS); 470 471 /* Select the voltage regulator mode by setting LPDS bit in PWR register according to Regulator parameter value */ 472 MODIFY_REG(PWR->CR, PWR_CR_LPDS, Regulator); 473 474 /* Set SLEEPDEEP bit of Cortex System Control Register */ 475 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk)); 476 477 /* Select Stop mode entry --------------------------------------------------*/ 478 if(STOPEntry == PWR_STOPENTRY_WFI) 479 { 480 /* Request Wait For Interrupt */ 481 __WFI(); 482 } 483 else 484 { 485 /* Request Wait For Event */ 486 __SEV(); 487 PWR_OverloadWfe(); /* WFE redefine locally */ 488 PWR_OverloadWfe(); /* WFE redefine locally */ 489 } 490 /* Reset SLEEPDEEP bit of Cortex System Control Register */ 491 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk)); 492 } 493 494 /** 495 * @brief Enters Standby mode. 496 * @note In Standby mode, all I/O pins are high impedance except for: 497 * - Reset pad (still available) 498 * - TAMPER pin if configured for tamper or calibration out. 499 * - WKUP pin (PA0) if enabled. 500 * @retval None 501 */ 502 void HAL_PWR_EnterSTANDBYMode(void) 503 { 504 /* Select Standby mode */ 505 SET_BIT(PWR->CR, PWR_CR_PDDS); 506 507 /* Set SLEEPDEEP bit of Cortex System Control Register */ 508 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk)); 509 510 /* This option is used to ensure that store operations are completed */ 511 #if defined ( __CC_ARM) 512 __force_stores(); 513 #endif 514 /* Request Wait For Interrupt */ 515 __WFI(); 516 } 517 518 519 /** 520 * @brief Indicates Sleep-On-Exit when returning from Handler mode to Thread mode. 521 * @note Set SLEEPONEXIT bit of SCR register. When this bit is set, the processor 522 * re-enters SLEEP mode when an interruption handling is over. 523 * Setting this bit is useful when the processor is expected to run only on 524 * interruptions handling. 525 * @retval None 526 */ 527 void HAL_PWR_EnableSleepOnExit(void) 528 { 529 /* Set SLEEPONEXIT bit of Cortex System Control Register */ 530 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPONEXIT_Msk)); 531 } 532 533 534 /** 535 * @brief Disables Sleep-On-Exit feature when returning from Handler mode to Thread mode. 536 * @note Clears SLEEPONEXIT bit of SCR register. When this bit is set, the processor 537 * re-enters SLEEP mode when an interruption handling is over. 538 * @retval None 539 */ 540 void HAL_PWR_DisableSleepOnExit(void) 541 { 542 /* Clear SLEEPONEXIT bit of Cortex System Control Register */ 543 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPONEXIT_Msk)); 544 } 545 546 547 /** 548 * @brief Enables CORTEX M3 SEVONPEND bit. 549 * @note Sets SEVONPEND bit of SCR register. When this bit is set, this causes 550 * WFE to wake up when an interrupt moves from inactive to pended. 551 * @retval None 552 */ 553 void HAL_PWR_EnableSEVOnPend(void) 554 { 555 /* Set SEVONPEND bit of Cortex System Control Register */ 556 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SEVONPEND_Msk)); 557 } 558 559 560 /** 561 * @brief Disables CORTEX M3 SEVONPEND bit. 562 * @note Clears SEVONPEND bit of SCR register. When this bit is set, this causes 563 * WFE to wake up when an interrupt moves from inactive to pended. 564 * @retval None 565 */ 566 void HAL_PWR_DisableSEVOnPend(void) 567 { 568 /* Clear SEVONPEND bit of Cortex System Control Register */ 569 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SEVONPEND_Msk)); 570 } 571 572 573 574 /** 575 * @brief This function handles the PWR PVD interrupt request. 576 * @note This API should be called under the PVD_IRQHandler(). 577 * @retval None 578 */ 579 void HAL_PWR_PVD_IRQHandler(void) 580 { 581 /* Check PWR exti flag */ 582 if(__HAL_PWR_PVD_EXTI_GET_FLAG() != RESET) 583 { 584 /* PWR PVD interrupt user callback */ 585 HAL_PWR_PVDCallback(); 586 587 /* Clear PWR Exti pending bit */ 588 __HAL_PWR_PVD_EXTI_CLEAR_FLAG(); 589 } 590 } 591 592 /** 593 * @brief PWR PVD interrupt callback 594 * @retval None 595 */ 596 __weak void HAL_PWR_PVDCallback(void) 597 { 598 /* NOTE : This function Should not be modified, when the callback is needed, 599 the HAL_PWR_PVDCallback could be implemented in the user file 600 */ 601 } 602 603 /** 604 * @} 605 */ 606 607 /** 608 * @} 609 */ 610 611 #endif /* HAL_PWR_MODULE_ENABLED */ 612 /** 613 * @} 614 */ 615 616 /** 617 * @} 618 */