tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L1/stm32l1xx_hal_rtc.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32l1xx_hal_rtc.c
   4   * @author  MCD Application Team
   5   * @version V1.0.0
   6   * @date    5-September-2014
   7   * @brief   RTC HAL module driver.
   8   *          This file provides firmware functions to manage the following
   9   *          functionalities of the Real Time Clock (RTC) peripheral:
  10   *           + Initialization and de-initialization functions
  11   *           + RTC Time and Date functions
  12   *           + RTC Alarm functions
  13   *           + Peripheral Control functions
  14   *           + Peripheral State functions
  15   *
  16   @verbatim
  17   ==============================================================================
  18               ##### Backup Domain Operating Condition #####
  19   ==============================================================================
  20   [..] The real-time clock (RTC) and the RTC backup registers can be powered
  21        from the VBAT voltage when the main VDD supply is powered off.
  22        To retain the content of the RTC backup registers and supply the RTC
  23        when VDD is turned off, VBAT pin can be connected to an optional
  24        standby voltage supplied by a battery or by another source.
  25
  26   [..] To allow the RTC operating even when the main digital supply (VDD) is turned
  27        off, the VBAT pin powers the following blocks:
  28     (#) The RTC
  29     (#) The LSE oscillator
  30     (#) PC13 to PC15 I/Os (when available)
  31
  32   [..] When the backup domain is supplied by VDD (analog switch connected to VDD),
  33        the following pins are available:
  34     (#) PC14 and PC15 can be used as either GPIO or LSE pins
  35     (#) PC13 can be used as a GPIO or as the RTC_AF1 pin
  36
  37   [..] When the backup domain is supplied by VBAT (analog switch connected to VBAT
  38        because VDD is not present), the following pins are available:
  39     (#) PC14 and PC15 can be used as LSE pins only
  40     (#) PC13 can be used as the RTC_AF1 pin
  41
  42                    ##### Backup Domain Reset #####
  43   ==================================================================
  44   [..] The backup domain reset sets all RTC registers and the RCC_BDCR register
  45        to their reset values.
  46   [..] A backup domain reset is generated when one of the following events occurs:
  47     (#) Software reset, triggered by setting the BDRST bit in the
  48         RCC Backup domain control register (RCC_BDCR).
  49     (#) VDD or VBAT power on, if both supplies have previously been powered off.
  50
  51                    ##### Backup Domain Access #####
  52   ==================================================================
  53   [..] After reset, the backup domain (RTC registers, RTC backup data
  54        registers and backup SRAM) is protected against possible unwanted write
  55        accesses.
  56   [..] To enable access to the RTC Domain and RTC registers, proceed as follows:
  57     (+) Enable the Power Controller (PWR) APB1 interface clock using the
  58         __PWR_CLK_ENABLE() function.
  59     (+) Enable access to RTC domain using the HAL_PWR_EnableBkUpAccess() function.
  60     (+) Select the RTC clock source using the __HAL_RCC_RTC_CONFIG() function.
  61     (+) Enable RTC Clock using the __HAL_RCC_RTC_ENABLE() function.
  62
  63
  64                   ##### How to use this driver #####
  65   ==================================================================
  66   [..]
  67     (+) Enable the RTC domain access (see description in the section above).
  68     (+) Configure the RTC Prescaler (Asynchronous and Synchronous) and RTC hour
  69         format using the HAL_RTC_Init() function.
  70
  71   *** Time and Date configuration ***
  72   ===================================
  73   [..]
  74     (+) To configure the RTC Calendar (Time and Date) use the HAL_RTC_SetTime()
  75         and HAL_RTC_SetDate() functions.
  76     (+) To read the RTC Calendar, use the HAL_RTC_GetTime() and HAL_RTC_GetDate() functions.
  77
  78   *** Alarm configuration ***
  79   ===========================
  80   [..]
  81     (+) To configure the RTC Alarm use the HAL_RTC_SetAlarm() function.
  82         You can also configure the RTC Alarm with interrupt mode using the HAL_RTC_SetAlarm_IT() function.
  83     (+) To read the RTC Alarm, use the HAL_RTC_GetAlarm() function.
  84
  85                   ##### RTC and low power modes #####
  86   ==================================================================
  87   [..] The MCU can be woken up from a low power mode by an RTC alternate
  88        function.
  89   [..] The RTC alternate functions are the RTC alarms (Alarm A and Alarm B),
  90        RTC wakeup, RTC tamper event detection and RTC time stamp event detection.
  91        These RTC alternate functions can wake up the system from the Stop and
  92        Standby low power modes.
  93   [..] The system can also wake up from low power modes without depending
  94        on an external interrupt (Auto-wakeup mode), by using the RTC alarm
  95        or the RTC wakeup events.
  96   [..] The RTC provides a programmable time base for waking up from the
  97        Stop or Standby mode at regular intervals.
  98        Wakeup from STOP and STANDBY modes is possible only when the RTC clock source
  99        is LSE or LSI.
 100
 101    @endverbatim
 102   ******************************************************************************
 103   * @attention
 104   *
 105   * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
 106   *
 107   * Redistribution and use in source and binary forms, with or without modification,
 108   * are permitted provided that the following conditions are met:
 109   *   1. Redistributions of source code must retain the above copyright notice,
 110   *      this list of conditions and the following disclaimer.
 111   *   2. Redistributions in binary form must reproduce the above copyright notice,
 112   *      this list of conditions and the following disclaimer in the documentation
 113   *      and/or other materials provided with the distribution.
 114   *   3. Neither the name of STMicroelectronics nor the names of its contributors
 115   *      may be used to endorse or promote products derived from this software
 116   *      without specific prior written permission.
 117   *
 118   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 119   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 120   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 121   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 122   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 123   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 124   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 125   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 126   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 127   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 128   *
 129   ******************************************************************************
 130   */
 131
 132 /* Includes ------------------------------------------------------------------*/
 133 #include "stm32l1xx_hal.h"
 134
 135 /** @addtogroup STM32L1xx_HAL_Driver
 136   * @{
 137   */
 138
 139 /** @defgroup RTC RTC
 140   * @brief RTC HAL module driver
 141   * @{
 142   */
 143
 144 #ifdef HAL_RTC_MODULE_ENABLED
 145
 146 /* Private typedef -----------------------------------------------------------*/
 147 /* Private define ------------------------------------------------------------*/
 148 /* Private macro -------------------------------------------------------------*/
 149 /* Private variables ---------------------------------------------------------*/
 150 /* Private function prototypes -----------------------------------------------*/
 151 /* Private functions ---------------------------------------------------------*/
 152 /** @defgroup RTC_Exported_Functions RTC Exported Functions
 153   * @{
 154   */
 155
 156 /** @defgroup RTC_Exported_Functions_Group1 Initialization and de-initialization functions
 157  *  @brief    Initialization and Configuration functions
 158  *
 159 @verbatim
 160  ===============================================================================
 161               ##### Initialization and de-initialization functions #####
 162  ===============================================================================
 163    [..] This section provides functions allowing to initialize and configure the
 164          RTC Prescaler (Synchronous and Asynchronous), RTC Hour format, disable
 165          RTC registers Write protection, enter and exit the RTC initialization mode,
 166          RTC registers synchronization check and reference clock detection enable.
 167          (#) The RTC Prescaler is programmed to generate the RTC 1Hz time base.
 168              It is split into 2 programmable prescalers to minimize power consumption.
 169              (++) A 7-bit asynchronous prescaler and a 13-bit synchronous prescaler.
 170              (++) When both prescalers are used, it is recommended to configure the
 171                  asynchronous prescaler to a high value to minimize power consumption.
 172          (#) All RTC registers are Write protected. Writing to the RTC registers
 173              is enabled by writing a key into the Write Protection register, RTC_WPR.
 174          (#) To configure the RTC Calendar, user application should enter
 175              initialization mode. In this mode, the calendar counter is stopped
 176              and its value can be updated. When the initialization sequence is
 177              complete, the calendar restarts counting after 4 RTCCLK cycles.
 178          (#) To read the calendar through the shadow registers after Calendar
 179              initialization, calendar update or after wakeup from low power modes
 180              the software must first clear the RSF flag. The software must then
 181              wait until it is set again before reading the calendar, which means
 182              that the calendar registers have been correctly copied into the
 183              RTC_TR and RTC_DR shadow registers.The HAL_RTC_WaitForSynchro() function
 184              implements the above software sequence (RSF clear and RSF check).
 185
 186 @endverbatim
 187   * @{
 188   */
 189
 190 /**
 191   * @brief  Initializes the RTC peripheral
 192   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 193   *                the configuration information for RTC.
 194   * @retval HAL status
 195   */
 196 HAL_StatusTypeDef HAL_RTC_Init(RTC_HandleTypeDef *hrtc)
 197 {
 198   /* Check the RTC peripheral state */
 199   if(hrtc == HAL_NULL)
 200   {
 201      return HAL_ERROR;
 202   }
 203
 204   /* Check the parameters */
 205   assert_param(IS_RTC_ALL_INSTANCE(hrtc->Instance));
 206   assert_param(IS_RTC_HOUR_FORMAT(hrtc->Init.HourFormat));
 207   assert_param(IS_RTC_ASYNCH_PREDIV(hrtc->Init.AsynchPrediv));
 208   assert_param(IS_RTC_SYNCH_PREDIV(hrtc->Init.SynchPrediv));
 209   assert_param(IS_RTC_OUTPUT(hrtc->Init.OutPut));
 210   assert_param(IS_RTC_OUTPUT_POL(hrtc->Init.OutPutPolarity));
 211   assert_param(IS_RTC_OUTPUT_TYPE(hrtc->Init.OutPutType));
 212
 213   if(hrtc->State == HAL_RTC_STATE_RESET)
 214   {
 215     /* Initialize RTC MSP */
 216     HAL_RTC_MspInit(hrtc);
 217   }
 218
 219   /* Set RTC state */
 220   hrtc->State = HAL_RTC_STATE_BUSY;
 221
 222   /* Disable the write protection for RTC registers */
 223   __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 224
 225   /* Set Initialization mode */
 226   if(RTC_EnterInitMode(hrtc) != HAL_OK)
 227   {
 228     /* Enable the write protection for RTC registers */
 229     __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 230
 231     /* Set RTC state */
 232     hrtc->State = HAL_RTC_STATE_ERROR;
 233
 234     return HAL_ERROR;
 235   }
 236   else
 237   {
 238     /* Clear RTC_CR FMT, OSEL and POL Bits */
 239     hrtc->Instance->CR &= ((uint32_t)~(RTC_CR_FMT | RTC_CR_OSEL | RTC_CR_POL));
 240     /* Set RTC_CR register */
 241     hrtc->Instance->CR |= (uint32_t)(hrtc->Init.HourFormat | hrtc->Init.OutPut | hrtc->Init.OutPutPolarity);
 242
 243     /* Configure the RTC PRER */
 244     hrtc->Instance->PRER = (uint32_t)(hrtc->Init.SynchPrediv);
 245     hrtc->Instance->PRER |= (uint32_t)(hrtc->Init.AsynchPrediv << 16);
 246
 247     /* Exit Initialization mode */
 248     hrtc->Instance->ISR &= (uint32_t)~RTC_ISR_INIT;
 249
 250     hrtc->Instance->TAFCR &= (uint32_t)~RTC_TAFCR_ALARMOUTTYPE;
 251     hrtc->Instance->TAFCR |= (uint32_t)(hrtc->Init.OutPutType);
 252
 253     /* Enable the write protection for RTC registers */
 254     __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 255
 256     /* Set RTC state */
 257     hrtc->State = HAL_RTC_STATE_READY;
 258
 259     return HAL_OK;
 260   }
 261 }
 262
 263 /**
 264   * @brief  DeInitializes the RTC peripheral
 265   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 266   *                the configuration information for RTC.
 267   * @note   This function doesn't reset the RTC Backup Data registers.
 268   * @retval HAL status
 269   */
 270 __weak HAL_StatusTypeDef HAL_RTC_DeInit(RTC_HandleTypeDef *hrtc)
 271 {
 272   /* Note : This function is defined into this file for library reference. */
 273   /*        Function content is located into file stm32l1xx_hal_rtc_ex.c   */
 274
 275   /* Return function status */
 276   return HAL_ERROR;
 277 }
 278
 279 /**
 280   * @brief  Initializes the RTC MSP.
 281   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 282   *                the configuration information for RTC.
 283   * @retval None
 284   */
 285 __weak void HAL_RTC_MspInit(RTC_HandleTypeDef* hrtc)
 286 {
 287   /* NOTE : This function Should not be modified, when the callback is needed,
 288             the HAL_RTC_MspInit could be implemented in the user file
 289    */
 290 }
 291
 292 /**
 293   * @brief  DeInitializes the RTC MSP.
 294   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 295   *                the configuration information for RTC.
 296   * @retval None
 297   */
 298 __weak void HAL_RTC_MspDeInit(RTC_HandleTypeDef* hrtc)
 299 {
 300   /* NOTE : This function Should not be modified, when the callback is needed,
 301             the HAL_RTC_MspDeInit could be implemented in the user file
 302    */
 303 }
 304
 305 /**
 306   * @}
 307   */
 308
 309 /** @defgroup RTC_Exported_Functions_Group2 RTC Time and Date functions
 310  *  @brief   RTC Time and Date functions
 311  *
 312 @verbatim
 313  ===============================================================================
 314                  ##### RTC Time and Date functions #####
 315  ===============================================================================
 316
 317  [..] This section provides functions allowing to configure Time and Date features
 318
 319 @endverbatim
 320   * @{
 321   */
 322
 323 /**
 324   * @brief  Sets RTC current time.
 325   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 326   *                the configuration information for RTC.
 327   * @param  sTime: Pointer to Time structure
 328   * @param  Format: Specifies the format of the entered parameters.
 329   *          This parameter can be one of the following values:
 330   *            @arg FORMAT_BIN: Binary data format
 331   *            @arg FORMAT_BCD: BCD data format
 332   * @retval HAL status
 333   */
 334 HAL_StatusTypeDef HAL_RTC_SetTime(RTC_HandleTypeDef *hrtc, RTC_TimeTypeDef *sTime, uint32_t Format)
 335 {
 336   uint32_t tmpreg = 0;
 337
 338  /* Check the parameters */
 339   assert_param(IS_RTC_FORMAT(Format));
 340   assert_param(IS_RTC_DAYLIGHT_SAVING(sTime->DayLightSaving));
 341   assert_param(IS_RTC_STORE_OPERATION(sTime->StoreOperation));
 342
 343   /* Process Locked */
 344   __HAL_LOCK(hrtc);
 345
 346   hrtc->State = HAL_RTC_STATE_BUSY;
 347
 348   if(Format == FORMAT_BIN)
 349   {
 350     if((hrtc->Instance->CR & RTC_CR_FMT) != (uint32_t)RESET)
 351     {
 352       assert_param(IS_RTC_HOUR12(sTime->Hours));
 353       assert_param(IS_RTC_HOURFORMAT12(sTime->TimeFormat));
 354     }
 355     else
 356     {
 357       sTime->TimeFormat = 0x00;
 358       assert_param(IS_RTC_HOUR24(sTime->Hours));
 359     }
 360     assert_param(IS_RTC_MINUTES(sTime->Minutes));
 361     assert_param(IS_RTC_SECONDS(sTime->Seconds));
 362
 363     tmpreg = (uint32_t)(((uint32_t)RTC_ByteToBcd2(sTime->Hours) << 16) | \
 364                         ((uint32_t)RTC_ByteToBcd2(sTime->Minutes) << 8) | \
 365                         ((uint32_t)RTC_ByteToBcd2(sTime->Seconds)) | \
 366                         (((uint32_t)sTime->TimeFormat) << 16));
 367   }
 368   else
 369   {
 370     if((hrtc->Instance->CR & RTC_CR_FMT) != (uint32_t)RESET)
 371     {
 372       tmpreg = RTC_Bcd2ToByte(sTime->Hours);
 373       assert_param(IS_RTC_HOUR12(tmpreg));
 374       assert_param(IS_RTC_HOURFORMAT12(sTime->TimeFormat));
 375     }
 376     else
 377     {
 378       sTime->TimeFormat = 0x00;
 379       assert_param(IS_RTC_HOUR24(RTC_Bcd2ToByte(sTime->Hours)));
 380     }
 381     assert_param(IS_RTC_MINUTES(RTC_Bcd2ToByte(sTime->Minutes)));
 382     assert_param(IS_RTC_SECONDS(RTC_Bcd2ToByte(sTime->Seconds)));
 383     tmpreg = (((uint32_t)(sTime->Hours) << 16) | \
 384               ((uint32_t)(sTime->Minutes) << 8) | \
 385               ((uint32_t)sTime->Seconds) | \
 386               ((uint32_t)(sTime->TimeFormat) << 16));
 387   }
 388
 389   /* Disable the write protection for RTC registers */
 390   __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 391
 392   /* Set Initialization mode */
 393   if(RTC_EnterInitMode(hrtc) != HAL_OK)
 394   {
 395     /* Enable the write protection for RTC registers */
 396     __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 397
 398     /* Set RTC state */
 399     hrtc->State = HAL_RTC_STATE_ERROR;
 400
 401     /* Process Unlocked */
 402     __HAL_UNLOCK(hrtc);
 403
 404     return HAL_ERROR;
 405   }
 406   else
 407   {
 408     /* Set the RTC_TR register */
 409     hrtc->Instance->TR = (uint32_t)(tmpreg & RTC_TR_RESERVED_MASK);
 410
 411     /* Clear the bits to be configured */
 412     hrtc->Instance->CR &= (uint32_t)~RTC_CR_BCK;
 413
 414     /* Configure the RTC_CR register */
 415     hrtc->Instance->CR |= (uint32_t)(sTime->DayLightSaving | sTime->StoreOperation);
 416
 417     /* Exit Initialization mode */
 418     hrtc->Instance->ISR &= (uint32_t)~RTC_ISR_INIT;
 419
 420     /* Wait for synchro */
 421     if(HAL_RTC_WaitForSynchro(hrtc) != HAL_OK)
 422     {
 423       /* Enable the write protection for RTC registers */
 424       __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 425
 426       hrtc->State = HAL_RTC_STATE_ERROR;
 427
 428       /* Process Unlocked */
 429       __HAL_UNLOCK(hrtc);
 430
 431       return HAL_ERROR;
 432     }
 433
 434     /* Enable the write protection for RTC registers */
 435     __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 436
 437    hrtc->State = HAL_RTC_STATE_READY;
 438
 439    __HAL_UNLOCK(hrtc);
 440
 441    return HAL_OK;
 442   }
 443 }
 444
 445
 446 /**
 447   * @brief  Sets RTC current date.
 448   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 449   *                the configuration information for RTC.
 450   * @param  sDate: Pointer to date structure
 451   * @param  Format: specifies the format of the entered parameters.
 452   *          This parameter can be one of the following values:
 453   *            @arg FORMAT_BIN: Binary data format
 454   *            @arg FORMAT_BCD: BCD data format
 455   * @retval HAL status
 456   */
 457 HAL_StatusTypeDef HAL_RTC_SetDate(RTC_HandleTypeDef *hrtc, RTC_DateTypeDef *sDate, uint32_t Format)
 458 {
 459   uint32_t datetmpreg = 0;
 460
 461  /* Check the parameters */
 462   assert_param(IS_RTC_FORMAT(Format));
 463
 464  /* Process Locked */
 465  __HAL_LOCK(hrtc);
 466
 467   hrtc->State = HAL_RTC_STATE_BUSY;
 468
 469   if((Format == FORMAT_BIN) && ((sDate->Month & 0x10) == 0x10))
 470   {
 471     sDate->Month = (uint8_t)((sDate->Month & (uint8_t)~(0x10)) + (uint8_t)0x0A);
 472   }
 473
 474   assert_param(IS_RTC_WEEKDAY(sDate->WeekDay));
 475
 476   if(Format == FORMAT_BIN)
 477   {
 478     assert_param(IS_RTC_YEAR(sDate->Year));
 479     assert_param(IS_RTC_MONTH(sDate->Month));
 480     assert_param(IS_RTC_DATE(sDate->Date));
 481
 482    datetmpreg = (((uint32_t)RTC_ByteToBcd2(sDate->Year) << 16) | \
 483                  ((uint32_t)RTC_ByteToBcd2(sDate->Month) << 8) | \
 484                  ((uint32_t)RTC_ByteToBcd2(sDate->Date)) | \
 485                  ((uint32_t)sDate->WeekDay << 13));
 486   }
 487   else
 488   {
 489     assert_param(IS_RTC_YEAR(RTC_Bcd2ToByte(sDate->Year)));
 490     datetmpreg = RTC_Bcd2ToByte(sDate->Month);
 491     assert_param(IS_RTC_MONTH(datetmpreg));
 492     datetmpreg = RTC_Bcd2ToByte(sDate->Date);
 493     assert_param(IS_RTC_DATE(datetmpreg));
 494
 495     datetmpreg = ((((uint32_t)sDate->Year) << 16) | \
 496                   (((uint32_t)sDate->Month) << 8) | \
 497                   ((uint32_t)sDate->Date) | \
 498                   (((uint32_t)sDate->WeekDay) << 13));
 499   }
 500
 501   /* Disable the write protection for RTC registers */
 502   __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 503
 504   /* Set Initialization mode */
 505   if(RTC_EnterInitMode(hrtc) != HAL_OK)
 506   {
 507     /* Enable the write protection for RTC registers */
 508     __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 509
 510     /* Set RTC state*/
 511     hrtc->State = HAL_RTC_STATE_ERROR;
 512
 513     /* Process Unlocked */
 514     __HAL_UNLOCK(hrtc);
 515
 516     return HAL_ERROR;
 517   }
 518   else
 519   {
 520     /* Set the RTC_DR register */
 521     hrtc->Instance->DR = (uint32_t)(datetmpreg & RTC_DR_RESERVED_MASK);
 522
 523     /* Exit Initialization mode */
 524     hrtc->Instance->ISR &= (uint32_t)~RTC_ISR_INIT;
 525
 526     /* Wait for synchro */
 527     if(HAL_RTC_WaitForSynchro(hrtc) != HAL_OK)
 528     {
 529       /* Enable the write protection for RTC registers */
 530       __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 531
 532       hrtc->State = HAL_RTC_STATE_ERROR;
 533
 534       /* Process Unlocked */
 535       __HAL_UNLOCK(hrtc);
 536
 537       return HAL_ERROR;
 538     }
 539
 540     /* Enable the write protection for RTC registers */
 541     __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 542
 543     hrtc->State = HAL_RTC_STATE_READY ;
 544
 545     /* Process Unlocked */
 546     __HAL_UNLOCK(hrtc);
 547
 548     return HAL_OK;
 549   }
 550 }
 551
 552 /**
 553   * @brief  Gets RTC current date.
 554   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 555   *                the configuration information for RTC.
 556   * @param  sDate: Pointer to Date structure
 557   * @param  Format: Specifies the format of the entered parameters.
 558   *          This parameter can be one of the following values:
 559   *            @arg FORMAT_BIN:  Binary data format
 560   *            @arg FORMAT_BCD:  BCD data format
 561   * @retval HAL status
 562   */
 563 HAL_StatusTypeDef HAL_RTC_GetDate(RTC_HandleTypeDef *hrtc, RTC_DateTypeDef *sDate, uint32_t Format)
 564 {
 565   uint32_t datetmpreg = 0;
 566
 567   /* Check the parameters */
 568   assert_param(IS_RTC_FORMAT(Format));
 569
 570   /* Get the DR register */
 571   datetmpreg = (uint32_t)(hrtc->Instance->DR & RTC_DR_RESERVED_MASK);
 572
 573   /* Fill the structure fields with the read parameters */
 574   sDate->Year = (uint8_t)((datetmpreg & (RTC_DR_YT | RTC_DR_YU)) >> 16);
 575   sDate->Month = (uint8_t)((datetmpreg & (RTC_DR_MT | RTC_DR_MU)) >> 8);
 576   sDate->Date = (uint8_t)(datetmpreg & (RTC_DR_DT | RTC_DR_DU));
 577   sDate->WeekDay = (uint8_t)((datetmpreg & (RTC_DR_WDU)) >> 13);
 578
 579   /* Check the input parameters format */
 580   if(Format == FORMAT_BIN)
 581   {
 582     /* Convert the date structure parameters to Binary format */
 583     sDate->Year = (uint8_t)RTC_Bcd2ToByte(sDate->Year);
 584     sDate->Month = (uint8_t)RTC_Bcd2ToByte(sDate->Month);
 585     sDate->Date = (uint8_t)RTC_Bcd2ToByte(sDate->Date);
 586   }
 587   return HAL_OK;
 588 }
 589
 590 /**
 591   * @}
 592   */
 593
 594 /** @defgroup RTC_Exported_Functions_Group3 RTC Alarm functions
 595  *  @brief   RTC Alarm functions
 596  *
 597 @verbatim
 598  ===============================================================================
 599                  ##### RTC Alarm functions #####
 600  ===============================================================================
 601
 602  [..] This section provides functions allowing to configure Alarm feature
 603
 604 @endverbatim
 605   * @{
 606   */
 607
 608 /**
 609   * @brief  Deactive the specified RTC Alarm
 610   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 611   *                the configuration information for RTC.
 612   * @param  Alarm: Specifies the Alarm.
 613   *          This parameter can be one of the following values:
 614   *            @arg RTC_ALARM_A:  AlarmA
 615   *            @arg RTC_ALARM_B:  AlarmB
 616   * @retval HAL status
 617   */
 618 HAL_StatusTypeDef HAL_RTC_DeactivateAlarm(RTC_HandleTypeDef *hrtc, uint32_t Alarm)
 619 {
 620   uint32_t tickstart = 0;
 621
 622   /* Check the parameters */
 623   assert_param(IS_ALARM(Alarm));
 624
 625   /* Process Locked */
 626   __HAL_LOCK(hrtc);
 627
 628   hrtc->State = HAL_RTC_STATE_BUSY;
 629
 630   /* Disable the write protection for RTC registers */
 631   __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 632
 633   if(Alarm == RTC_ALARM_A)
 634   {
 635     /* AlarmA */
 636     __HAL_RTC_ALARMA_DISABLE(hrtc);
 637
 638     /* In case of interrupt mode is used, the interrupt source must disabled */
 639     __HAL_RTC_ALARM_DISABLE_IT(hrtc, RTC_IT_ALRA);
 640
 641     tickstart = HAL_GetTick();
 642
 643     /* Wait till RTC ALRxWF flag is set and if Time out is reached exit */
 644     while(__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAWF) == RESET)
 645     {
 646       if((HAL_GetTick() - tickstart ) >  RTC_TIMEOUT_VALUE)
 647       {
 648         /* Enable the write protection for RTC registers */
 649         __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 650
 651         hrtc->State = HAL_RTC_STATE_TIMEOUT;
 652
 653         /* Process Unlocked */
 654         __HAL_UNLOCK(hrtc);
 655
 656         return HAL_TIMEOUT;
 657       }
 658     }
 659   }
 660   else
 661   {
 662     /* AlarmB */
 663     __HAL_RTC_ALARMB_DISABLE(hrtc);
 664
 665     /* In case of interrupt mode is used, the interrupt source must disabled */
 666     __HAL_RTC_ALARM_DISABLE_IT(hrtc,RTC_IT_ALRB);
 667
 668     tickstart = HAL_GetTick();
 669
 670     /* Wait till RTC ALRxWF flag is set and if Time out is reached exit */
 671     while(__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRBWF) == RESET)
 672     {
 673       if((HAL_GetTick() - tickstart ) >  RTC_TIMEOUT_VALUE)
 674       {
 675         /* Enable the write protection for RTC registers */
 676         __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 677
 678         hrtc->State = HAL_RTC_STATE_TIMEOUT;
 679
 680         /* Process Unlocked */
 681         __HAL_UNLOCK(hrtc);
 682
 683         return HAL_TIMEOUT;
 684       }
 685     }
 686   }
 687   /* Enable the write protection for RTC registers */
 688   __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 689
 690   hrtc->State = HAL_RTC_STATE_READY;
 691
 692   /* Process Unlocked */
 693   __HAL_UNLOCK(hrtc);
 694
 695   return HAL_OK;
 696 }
 697
 698 /**
 699   * @brief  This function handles Alarm interrupt request.
 700   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 701   *                the configuration information for RTC.
 702   * @retval None
 703   */
 704 void HAL_RTC_AlarmIRQHandler(RTC_HandleTypeDef* hrtc)
 705 {
 706   if(__HAL_RTC_ALARM_GET_IT(hrtc, RTC_IT_ALRA))
 707   {
 708     /* Get the status of the Interrupt */
 709     if((uint32_t)(hrtc->Instance->CR & RTC_IT_ALRA) != (uint32_t)RESET)
 710     {
 711       /* AlarmA callback */
 712       HAL_RTC_AlarmAEventCallback(hrtc);
 713
 714       /* Clear the Alarm interrupt pending bit */
 715       __HAL_RTC_ALARM_CLEAR_FLAG(hrtc,RTC_FLAG_ALRAF);
 716     }
 717   }
 718
 719   if(__HAL_RTC_ALARM_GET_IT(hrtc, RTC_IT_ALRB))
 720   {
 721     /* Get the status of the Interrupt */
 722     if((uint32_t)(hrtc->Instance->CR & RTC_IT_ALRB) != (uint32_t)RESET)
 723     {
 724       /* AlarmB callback */
 725       HAL_RTCEx_AlarmBEventCallback(hrtc);
 726
 727       /* Clear the Alarm interrupt pending bit */
 728       __HAL_RTC_ALARM_CLEAR_FLAG(hrtc,RTC_FLAG_ALRBF);
 729     }
 730   }
 731
 732   /* Clear the EXTI's line Flag for RTC Alarm */
 733   __HAL_RTC_CLEAR_FLAG(RTC_EXTI_LINE_ALARM_EVENT);
 734
 735   /* Change RTC state */
 736   hrtc->State = HAL_RTC_STATE_READY;
 737 }
 738
 739 /**
 740   * @brief  Alarm A callback.
 741   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 742   *                the configuration information for RTC.
 743   * @retval None
 744   */
 745 __weak void HAL_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc)
 746 {
 747   /* NOTE : This function Should not be modified, when the callback is needed,
 748             the HAL_RTC_AlarmAEventCallback could be implemented in the user file
 749    */
 750 }
 751
 752 /**
 753   * @brief  This function handles AlarmA Polling request.
 754   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 755   *                the configuration information for RTC.
 756   * @param  Timeout: Timeout duration
 757   * @retval HAL status
 758   */
 759 HAL_StatusTypeDef HAL_RTC_PollForAlarmAEvent(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
 760 {
 761
 762   uint32_t tickstart = HAL_GetTick();
 763
 764   while(__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAF) == RESET)
 765   {
 766     if(Timeout != HAL_MAX_DELAY)
 767     {
 768       if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
 769       {
 770         hrtc->State = HAL_RTC_STATE_TIMEOUT;
 771         return HAL_TIMEOUT;
 772       }
 773     }
 774   }
 775
 776   /* Clear the Alarm interrupt pending bit */
 777   __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRAF);
 778
 779   /* Change RTC state */
 780   hrtc->State = HAL_RTC_STATE_READY;
 781
 782   return HAL_OK;
 783 }
 784
 785 /**
 786   * @}
 787   */
 788
 789 /** @defgroup RTC_Exported_Functions_Group5 Peripheral State functions
 790  *  @brief   Peripheral State functions
 791  *
 792 @verbatim
 793  ===============================================================================
 794                      ##### Peripheral State functions #####
 795  ===============================================================================
 796     [..]
 797     This subsection provides functions allowing to
 798       (+) Get RTC state
 799
 800 @endverbatim
 801   * @{
 802   */
 803 /**
 804   * @brief  Returns the RTC state.
 805   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 806   *                the configuration information for RTC.
 807   * @retval HAL state
 808   */
 809 HAL_RTCStateTypeDef HAL_RTC_GetState(RTC_HandleTypeDef* hrtc)
 810 {
 811   return hrtc->State;
 812 }
 813
 814 /**
 815   * @}
 816   */
 817
 818 /**
 819   * @}
 820   */
 821
 822 /** @defgroup RTC_Internal_Functions RTC Internal function
 823   * @{
 824   */
 825
 826 /**
 827   * @brief  Enters the RTC Initialization mode.
 828   * @note   The RTC Initialization mode is write protected, use the
 829   *         __HAL_RTC_WRITEPROTECTION_DISABLE() before calling this function.
 830   * @param  hrtc: pointer to a RTC_HandleTypeDef structure that contains
 831   *                the configuration information for RTC.
 832   * @retval HAL status
 833   */
 834 HAL_StatusTypeDef RTC_EnterInitMode(RTC_HandleTypeDef* hrtc)
 835 {
 836   uint32_t tickstart = 0;
 837
 838   /* Check if the Initialization mode is set */
 839   if((hrtc->Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
 840   {
 841     /* Set the Initialization mode */
 842     hrtc->Instance->ISR = (uint32_t)RTC_INIT_MASK;
 843
 844     tickstart = HAL_GetTick();
 845     /* Wait till RTC is in INIT state and if Time out is reached exit */
 846     while((hrtc->Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
 847     {
 848       if((HAL_GetTick() - tickstart) >  RTC_TIMEOUT_VALUE)
 849       {
 850         return HAL_TIMEOUT;
 851       }
 852     }
 853   }
 854
 855   return HAL_OK;
 856 }
 857
 858 /**
 859   * @brief  Converts a 2 digit decimal to BCD format.
 860   * @param  Value: Byte to be converted
 861   * @retval Converted byte
 862   */
 863 uint8_t RTC_ByteToBcd2(uint8_t Value)
 864 {
 865   uint32_t bcdhigh = 0;
 866
 867   while(Value >= 10)
 868   {
 869     bcdhigh++;
 870     Value -= 10;
 871   }
 872
 873   return  ((uint8_t)(bcdhigh << 4) | Value);
 874 }
 875
 876 /**
 877   * @brief  Converts from 2 digit BCD to Binary.
 878   * @param  Value: BCD value to be converted
 879   * @retval Converted word
 880   */
 881 uint8_t RTC_Bcd2ToByte(uint8_t Value)
 882 {
 883   uint32_t tmp = 0;
 884   tmp = ((uint8_t)(Value & (uint8_t)0xF0) >> (uint8_t)0x4) * 10;
 885   return (tmp + (Value & (uint8_t)0x0F));
 886 }
 887
 888
 889 /**
 890   * @}
 891   */
 892
 893 #endif /* HAL_RTC_MODULE_ENABLED */
 894 /**
 895   * @}
 896   */
 897
 898 /**
 899   * @}
 900   */
 901
 902 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/