stm32l4xx_hal.c

00001 /**
00002   ******************************************************************************
00003   * @file    stm32l4xx_hal.c
00004   * @author  MCD Application Team
00005   * @version V1.5.1
00006   * @date    31-May-2016
00007   * @brief   HAL module driver.
00008   *          This is the common part of the HAL initialization
00009   *
00010   @verbatim
00011   ==============================================================================
00012                      ##### How to use this driver #####
00013   ==============================================================================
00014     [..]
00015     The common HAL driver contains a set of generic and common APIs that can be
00016     used by the PPP peripheral drivers and the user to start using the HAL.
00017     [..]
00018     The HAL contains two APIs' categories:
00019          (+) Common HAL APIs
00020          (+) Services HAL APIs
00021 
00022   @endverbatim
00023   ******************************************************************************
00024   * @attention
00025   *
00026   * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
00027   *
00028   * Redistribution and use in source and binary forms, with or without modification,
00029   * are permitted provided that the following conditions are met:
00030   *   1. Redistributions of source code must retain the above copyright notice,
00031   *      this list of conditions and the following disclaimer.
00032   *   2. Redistributions in binary form must reproduce the above copyright notice,
00033   *      this list of conditions and the following disclaimer in the documentation
00034   *      and/or other materials provided with the distribution.
00035   *   3. Neither the name of STMicroelectronics nor the names of its contributors
00036   *      may be used to endorse or promote products derived from this software
00037   *      without specific prior written permission.
00038   *
00039   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00040   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00041   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00042   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00043   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00044   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00045   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00046   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00047   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00048   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00049   *
00050   ******************************************************************************
00051   */
00052 
00053 /* Includes ------------------------------------------------------------------*/
00054 #include "stm32l4xx_hal.h"
00055 
00056 /** @addtogroup STM32L4xx_HAL_Driver
00057   * @{
00058   */
00059 
00060 /** @defgroup HAL HAL
00061   * @brief HAL module driver
00062   * @{
00063   */
00064 
00065 #ifdef HAL_MODULE_ENABLED
00066 
00067 /* Private typedef -----------------------------------------------------------*/
00068 /* Private define ------------------------------------------------------------*/
00069 /**
00070  * @brief STM32L4xx HAL Driver version number V1.5.1
00071    */
00072 #define __STM32L4xx_HAL_VERSION_MAIN   (0x01) /*!< [31:24] main version */
00073 #define __STM32L4xx_HAL_VERSION_SUB1   (0x05) /*!< [23:16] sub1 version */
00074 #define __STM32L4xx_HAL_VERSION_SUB2   (0x01) /*!< [15:8]  sub2 version */
00075 #define __STM32L4xx_HAL_VERSION_RC     (0x00) /*!< [7:0]  release candidate */
00076 #define __STM32L4xx_HAL_VERSION         ((__STM32L4xx_HAL_VERSION_MAIN << 24)\
00077                                         |(__STM32L4xx_HAL_VERSION_SUB1 << 16)\
00078                                         |(__STM32L4xx_HAL_VERSION_SUB2 << 8 )\
00079                                         |(__STM32L4xx_HAL_VERSION_RC))
00080 
00081 #if defined(VREFBUF)
00082 #define VREFBUF_TIMEOUT_VALUE     (uint32_t)10   /* 10 ms (to be confirmed) */
00083 #endif /* VREFBUF */
00084 
00085 /* ------------ SYSCFG registers bit address in the alias region ------------ */
00086 #define SYSCFG_OFFSET             (SYSCFG_BASE - PERIPH_BASE)
00087 /* ---  MEMRMP Register ---*/
00088 /* Alias word address of FB_MODE bit */
00089 #define MEMRMP_OFFSET             SYSCFG_OFFSET
00090 #define FB_MODE_BitNumber         ((uint8_t)0x8)
00091 #define FB_MODE_BB                (PERIPH_BB_BASE + (MEMRMP_OFFSET * 32) + (FB_MODE_BitNumber * 4))
00092 
00093 /* --- SCSR Register ---*/
00094 /* Alias word address of SRAM2ER bit */
00095 #define SCSR_OFFSET              (SYSCFG_OFFSET + 0x18)
00096 #define BRER_BitNumber           ((uint8_t)0x0)
00097 #define SCSR_SRAM2ER_BB          (PERIPH_BB_BASE + (SCSR_OFFSET * 32) + (BRER_BitNumber * 4))
00098 
00099 /* Private macro -------------------------------------------------------------*/
00100 /* Private variables ---------------------------------------------------------*/
00101 __IO uint32_t uwTick;
00102 
00103 /* Private function prototypes -----------------------------------------------*/
00104 /* Exported functions --------------------------------------------------------*/
00105 
00106 /** @defgroup HAL_Exported_Functions HAL Exported Functions
00107   * @{
00108   */
00109 
00110 /** @defgroup HAL_Exported_Functions_Group1 Initialization and de-initialization Functions
00111  *  @brief    Initialization and de-initialization functions
00112  *
00113 @verbatim
00114  ===============================================================================
00115               ##### Initialization and de-initialization functions #####
00116  ===============================================================================
00117     [..]  This section provides functions allowing to:
00118       (+) Initialize the Flash interface the NVIC allocation and initial time base
00119           clock configuration.
00120       (+) De-initialize common part of the HAL.
00121       (+) Configure the time base source to have 1ms time base with a dedicated
00122           Tick interrupt priority.
00123         (++) SysTick timer is used by default as source of time base, but user
00124              can eventually implement his proper time base source (a general purpose
00125              timer for example or other time source), keeping in mind that Time base
00126              duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
00127              handled in milliseconds basis.
00128         (++) Time base configuration function (HAL_InitTick ()) is called automatically
00129              at the beginning of the program after reset by HAL_Init() or at any time
00130              when clock is configured, by HAL_RCC_ClockConfig().
00131         (++) Source of time base is configured  to generate interrupts at regular
00132              time intervals. Care must be taken if HAL_Delay() is called from a
00133              peripheral ISR process, the Tick interrupt line must have higher priority
00134             (numerically lower) than the peripheral interrupt. Otherwise the caller
00135             ISR process will be blocked.
00136        (++) functions affecting time base configurations are declared as __weak
00137              to make  override possible  in case of other  implementations in user file.
00138 @endverbatim
00139   * @{
00140   */
00141 
00142 /**
00143   * @brief  Configure the Flash prefetch, the Instruction and Data caches,
00144   *         the time base source, NVIC and any required global low level hardware 
00145   *         by calling the HAL_MspInit() callback function to be optionally defined in user file 
00146   *         stm32l4xx_hal_msp.c.
00147   *
00148   * @note   HAL_Init() function is called at the beginning of program after reset and before 
00149   *         the clock configuration.
00150   *             
00151   * @note   In the default implementation the System Timer (Systick) is used as source of time base.
00152   *         The Systick configuration is based on MSI clock, as MSI is the clock
00153   *         used after a system Reset and the NVIC configuration is set to Priority group 4.
00154   *         Once done, time base tick starts incrementing: the tick variable counter is incremented 
00155   *         each 1ms in the SysTick_Handler() interrupt handler.
00156   *
00157   * @retval HAL status
00158   */
00159 HAL_StatusTypeDef HAL_Init(void)
00160 {
00161   /* Configure Flash prefetch, Instruction cache, Data cache */
00162   /* Default configuration at reset is:                      */
00163   /* - Prefetch disabled                                     */
00164   /* - Instruction cache enabled                             */
00165   /* - Data cache enabled                                    */
00166 #if (INSTRUCTION_CACHE_ENABLE == 0)
00167    __HAL_FLASH_INSTRUCTION_CACHE_DISABLE();
00168 #endif /* INSTRUCTION_CACHE_ENABLE */
00169 
00170 #if (DATA_CACHE_ENABLE == 0)
00171    __HAL_FLASH_DATA_CACHE_DISABLE();
00172 #endif /* DATA_CACHE_ENABLE */
00173 
00174 #if (PREFETCH_ENABLE != 0)
00175   __HAL_FLASH_PREFETCH_BUFFER_ENABLE();
00176 #endif /* PREFETCH_ENABLE */
00177 
00178   /* Set Interrupt Group Priority */
00179   HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
00180 
00181   /* Use SysTick as time base source and configure 1ms tick (default clock after Reset is MSI) */
00182   HAL_InitTick(TICK_INT_PRIORITY);
00183 
00184   /* Init the low level hardware */
00185   HAL_MspInit();
00186 
00187   /* Return function status */
00188   return HAL_OK;
00189 }
00190 
00191 /**
00192   * @brief De-initialize common part of the HAL and stop the source of time base.
00193   * @note This function is optional.
00194   * @retval HAL status
00195   */
00196 HAL_StatusTypeDef HAL_DeInit(void)
00197 {
00198   /* Reset of all peripherals */
00199   __HAL_RCC_APB1_FORCE_RESET();
00200   __HAL_RCC_APB1_RELEASE_RESET();
00201 
00202   __HAL_RCC_APB2_FORCE_RESET();
00203   __HAL_RCC_APB2_RELEASE_RESET();
00204 
00205   __HAL_RCC_AHB1_FORCE_RESET();
00206   __HAL_RCC_AHB1_RELEASE_RESET();
00207 
00208   __HAL_RCC_AHB2_FORCE_RESET();
00209   __HAL_RCC_AHB2_RELEASE_RESET();
00210 
00211   __HAL_RCC_AHB3_FORCE_RESET();
00212   __HAL_RCC_AHB3_RELEASE_RESET();
00213 
00214   /* De-Init the low level hardware */
00215   HAL_MspDeInit();
00216 
00217   /* Return function status */
00218   return HAL_OK;
00219 }
00220 
00221 /**
00222   * @brief  Initialize the MSP.
00223   * @retval None
00224   */
00225 __weak void HAL_MspInit(void)
00226 {
00227   /* NOTE : This function should not be modified, when the callback is needed,
00228             the HAL_MspInit could be implemented in the user file
00229    */
00230 }
00231 
00232 /**
00233   * @brief  DeInitialize the MSP.
00234   * @retval None
00235   */
00236 __weak void HAL_MspDeInit(void)
00237 {
00238   /* NOTE : This function should not be modified, when the callback is needed,
00239             the HAL_MspDeInit could be implemented in the user file
00240    */
00241 }
00242 
00243 /**
00244   * @brief This function configures the source of the time base:
00245   *        The time source is configured to have 1ms time base with a dedicated
00246   *        Tick interrupt priority.
00247   * @note This function is called  automatically at the beginning of program after
00248   *       reset by HAL_Init() or at any time when clock is reconfigured  by HAL_RCC_ClockConfig().
00249   * @note In the default implementation, SysTick timer is the source of time base.
00250   *       It is used to generate interrupts at regular time intervals.
00251   *       Care must be taken if HAL_Delay() is called from a peripheral ISR process,
00252   *       The SysTick interrupt must have higher priority (numerically lower)
00253   *       than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
00254   *       The function is declared as __weak  to be overwritten  in case of other
00255   *       implementation  in user file.
00256   * @param TickPriority: Tick interrupt priority.
00257   * @retval HAL status
00258   */
00259 __weak HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
00260 {
00261   /*Configure the SysTick to have interrupt in 1ms time basis*/
00262   HAL_SYSTICK_Config(SystemCoreClock/1000);
00263 
00264   /*Configure the SysTick IRQ priority */
00265   HAL_NVIC_SetPriority(SysTick_IRQn, TickPriority ,0);
00266 
00267   /* Return function status */
00268   return HAL_OK;
00269 }
00270 
00271 /**
00272   * @}
00273   */
00274 
00275 /** @defgroup HAL_Exported_Functions_Group2 HAL Control functions
00276  *  @brief    HAL Control functions
00277  *
00278 @verbatim
00279  ===============================================================================
00280                       ##### HAL Control functions #####
00281  ===============================================================================
00282     [..]  This section provides functions allowing to:
00283       (+) Provide a tick value in millisecond
00284       (+) Provide a blocking delay in millisecond
00285       (+) Suspend the time base source interrupt
00286       (+) Resume the time base source interrupt
00287       (+) Get the HAL API driver version
00288       (+) Get the device identifier
00289       (+) Get the device revision identifier
00290 
00291 @endverbatim
00292   * @{
00293   */
00294 
00295 /**
00296   * @brief This function is called to increment a global variable "uwTick"
00297   *        used as application time base.
00298   * @note In the default implementation, this variable is incremented each 1ms
00299   *       in SysTick ISR.
00300  * @note This function is declared as __weak to be overwritten in case of other
00301   *      implementations in user file.
00302   * @retval None
00303   */
00304 __weak void HAL_IncTick(void)
00305 {
00306   uwTick++;
00307 }
00308 
00309 /**
00310   * @brief Provide a tick value in millisecond.
00311   * @note This function is declared as __weak to be overwritten in case of other
00312   *       implementations in user file.
00313   * @retval tick value
00314   */
00315 __weak uint32_t HAL_GetTick(void)
00316 {
00317   return uwTick;
00318 }
00319 
00320 /**
00321   * @brief Provide accurate delay (in milliseconds) based on variable incremented.
00322   * @note In the default implementation , SysTick timer is the source of time base.
00323   *       It is used to generate interrupts at regular time intervals where uwTick
00324   *       is incremented.
00325   * @note This function is declared as __weak to be overwritten in case of other
00326   *       implementations in user file.
00327   * @param Delay: specifies the delay time length, in milliseconds.
00328   * @retval None
00329   */
00330 __weak void HAL_Delay(uint32_t Delay)
00331 {
00332   uint32_t tickstart = 0;
00333   tickstart = HAL_GetTick();
00334   while((HAL_GetTick() - tickstart) < Delay)
00335   {
00336   }
00337 }
00338 
00339 /**
00340   * @brief Suspend Tick increment.
00341   * @note In the default implementation , SysTick timer is the source of time base. It is
00342   *       used to generate interrupts at regular time intervals. Once HAL_SuspendTick()
00343   *       is called, the SysTick interrupt will be disabled and so Tick increment
00344   *       is suspended.
00345   * @note This function is declared as __weak to be overwritten in case of other
00346   *       implementations in user file.
00347   * @retval None
00348   */
00349 __weak void HAL_SuspendTick(void)
00350 {
00351   /* Disable SysTick Interrupt */
00352   SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk;
00353 }
00354 
00355 /**
00356   * @brief Resume Tick increment.
00357   * @note In the default implementation , SysTick timer is the source of time base. It is
00358   *       used to generate interrupts at regular time intervals. Once HAL_ResumeTick()
00359   *       is called, the SysTick interrupt will be enabled and so Tick increment
00360   *       is resumed.
00361   * @note This function is declared as __weak to be overwritten in case of other
00362   *       implementations in user file.
00363   * @retval None
00364   */
00365 __weak void HAL_ResumeTick(void)
00366 {
00367   /* Enable SysTick Interrupt */
00368   SysTick->CTRL  |= SysTick_CTRL_TICKINT_Msk;
00369 }
00370 
00371 /**
00372   * @brief  Return the HAL revision.
00373   * @retval version : 0xXYZR (8bits for each decimal, R for RC)
00374   */
00375 uint32_t HAL_GetHalVersion(void)
00376 {
00377  return __STM32L4xx_HAL_VERSION;
00378 }
00379 
00380 /**
00381   * @brief  Return the device revision identifier.
00382   * @retval Device revision identifier
00383   */
00384 uint32_t HAL_GetREVID(void)
00385 {
00386    return((DBGMCU->IDCODE & DBGMCU_IDCODE_REV_ID) >> 16);
00387 }
00388 
00389 /**
00390   * @brief  Return the device identifier.
00391   * @retval Device identifier
00392   */
00393 uint32_t HAL_GetDEVID(void)
00394 {
00395    return(DBGMCU->IDCODE & DBGMCU_IDCODE_DEV_ID);
00396 }
00397 
00398 /**
00399   * @}
00400   */
00401 
00402 /** @defgroup HAL_Exported_Functions_Group3 HAL Debug functions
00403  *  @brief    HAL Debug functions
00404  *
00405 @verbatim
00406  ===============================================================================
00407                       ##### HAL Debug functions #####
00408  ===============================================================================
00409     [..]  This section provides functions allowing to:
00410       (+) Enable/Disable Debug module during SLEEP mode
00411       (+) Enable/Disable Debug module during STOP0/STOP1/STOP2 modes
00412       (+) Enable/Disable Debug module during STANDBY mode
00413 
00414 @endverbatim
00415   * @{
00416   */
00417 
00418 /**
00419   * @brief  Enable the Debug Module during SLEEP mode.
00420   * @retval None
00421   */
00422 void HAL_DBGMCU_EnableDBGSleepMode(void)
00423 {
00424   SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);
00425 }
00426 
00427 /**
00428   * @brief  Disable the Debug Module during SLEEP mode.
00429   * @retval None
00430   */
00431 void HAL_DBGMCU_DisableDBGSleepMode(void)
00432 {
00433   CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);
00434 }
00435 
00436 /**
00437   * @brief  Enable the Debug Module during STOP0/STOP1/STOP2 modes.
00438   * @retval None
00439   */
00440 void HAL_DBGMCU_EnableDBGStopMode(void)
00441 {
00442   SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STOP);
00443 }
00444 
00445 /**
00446   * @brief  Disable the Debug Module during STOP0/STOP1/STOP2 modes.
00447   * @retval None
00448   */
00449 void HAL_DBGMCU_DisableDBGStopMode(void)
00450 {
00451   CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STOP);
00452 }
00453 
00454 /**
00455   * @brief  Enable the Debug Module during STANDBY mode.
00456   * @retval None
00457   */
00458 void HAL_DBGMCU_EnableDBGStandbyMode(void)
00459 {
00460   SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STANDBY);
00461 }
00462 
00463 /**
00464   * @brief  Disable the Debug Module during STANDBY mode.
00465   * @retval None
00466   */
00467 void HAL_DBGMCU_DisableDBGStandbyMode(void)
00468 {
00469   CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STANDBY);
00470 }
00471 
00472 /**
00473   * @}
00474   */
00475 
00476 /** @defgroup HAL_Exported_Functions_Group4 HAL SYSCFG configuration functions
00477  *  @brief    HAL SYSCFG configuration functions
00478  *
00479 @verbatim
00480  ===============================================================================
00481                       ##### HAL SYSCFG configuration functions #####
00482  ===============================================================================
00483     [..]  This section provides functions allowing to:
00484       (+) Start a hardware SRAM2 erase operation
00485       (+) Enable/Disable the Internal FLASH Bank Swapping
00486       (+) Configure the Voltage reference buffer
00487       (+) Enable/Disable the Voltage reference buffer
00488       (+) Enable/Disable the I/O analog switch voltage booster
00489 
00490 @endverbatim
00491   * @{
00492   */
00493 
00494 /**
00495   * @brief  Start a hardware SRAM2 erase operation.
00496   * @note   As long as SRAM2 is not erased the SRAM2ER bit will be set.
00497   *         This bit is automatically reset at the end of the SRAM2 erase operation.
00498   * @retval None
00499   */
00500 void HAL_SYSCFG_SRAM2Erase(void)
00501 {
00502   /* unlock the write protection of the SRAM2ER bit */
00503   SYSCFG->SKR = 0xCA;
00504   SYSCFG->SKR = 0x53;
00505   /* Starts a hardware SRAM2 erase operation*/
00506   *(__IO uint32_t *) SCSR_SRAM2ER_BB = (uint8_t)0x00000001;
00507 }
00508 
00509 /**
00510   * @brief  Enable the Internal FLASH Bank Swapping.
00511   *
00512   * @note   This function can be used only for STM32L4xx devices.
00513   *
00514   * @note   Flash Bank2 mapped at 0x08000000 (and aliased @0x00000000)
00515   *         and Flash Bank1 mapped at 0x08100000 (and aliased at 0x00100000)
00516   *
00517   * @retval None
00518   */
00519 void HAL_SYSCFG_EnableMemorySwappingBank(void)
00520 {
00521   *(__IO uint32_t *)FB_MODE_BB = (uint32_t)ENABLE;
00522 }
00523 
00524 /**
00525   * @brief  Disable the Internal FLASH Bank Swapping.
00526   *
00527   * @note   This function can be used only for STM32L4xx devices.
00528   *
00529   * @note   The default state : Flash Bank1 mapped at 0x08000000 (and aliased @0x0000 0000)
00530   *         and Flash Bank2 mapped at 0x08100000 (and aliased at 0x00100000)
00531   *
00532   * @retval None
00533   */
00534 void HAL_SYSCFG_DisableMemorySwappingBank(void)
00535 {
00536 
00537   *(__IO uint32_t *)FB_MODE_BB = (uint32_t)DISABLE;
00538 }
00539 
00540 #if defined(VREFBUF)
00541 /**
00542   * @brief Configure the internal voltage reference buffer voltage scale.
00543   * @param  VoltageScaling: specifies the output voltage to achieve
00544   *          This parameter can be one of the following values:
00545   *            @arg SYSCFG_VREFBUF_VOLTAGE_SCALE0: VREF_OUT1 around 2.048 V. 
00546   *                                                This requires VDDA equal to or higher than 2.4 V.
00547   *            @arg SYSCFG_VREFBUF_VOLTAGE_SCALE1: VREF_OUT1 around 2.5 V. 
00548   *                                                This requires VDDA equal to or higher than 2.8 V.
00549   * @retval None
00550   */
00551 void HAL_SYSCFG_VREFBUF_VoltageScalingConfig(uint32_t VoltageScaling)
00552 {
00553   /* Check the parameters */
00554   assert_param(IS_SYSCFG_VREFBUF_VOLTAGE_SCALE(VoltageScaling));
00555   
00556   MODIFY_REG(VREFBUF->CSR, VREFBUF_CSR_VRS, VoltageScaling);
00557 }
00558 
00559 /**
00560   * @brief Configure the internal voltage reference buffer high impedance mode.
00561   * @param  Mode: specifies the high impedance mode
00562   *          This parameter can be one of the following values:
00563   *            @arg SYSCFG_VREFBUF_HIGH_IMPEDANCE_DISABLE: VREF+ pin is internally connect to VREFINT output.
00564   *            @arg SYSCFG_VREFBUF_HIGH_IMPEDANCE_ENABLE: VREF+ pin is high impedance.
00565   * @retval None
00566   */
00567 void HAL_SYSCFG_VREFBUF_HighImpedanceConfig(uint32_t Mode)
00568 {
00569   /* Check the parameters */
00570   assert_param(IS_SYSCFG_VREFBUF_HIGH_IMPEDANCE(Mode));
00571   
00572   MODIFY_REG(VREFBUF->CSR, VREFBUF_CSR_HIZ, Mode);
00573 }
00574 
00575 /**
00576   * @brief  Tune the Internal Voltage Reference buffer (VREFBUF).
00577   * @retval None
00578   */
00579 void HAL_SYSCFG_VREFBUF_TrimmingConfig(uint32_t TrimmingValue)
00580 {
00581   /* Check the parameters */
00582   assert_param(IS_SYSCFG_VREFBUF_TRIMMING(TrimmingValue));
00583   
00584   MODIFY_REG(VREFBUF->CCR, VREFBUF_CCR_TRIM, TrimmingValue);
00585 }
00586 
00587 /**
00588   * @brief  Enable the Internal Voltage Reference buffer (VREFBUF).
00589   * @retval HAL_OK/HAL_TIMEOUT
00590   */
00591 HAL_StatusTypeDef HAL_SYSCFG_EnableVREFBUF(void)
00592 {
00593   uint32_t  tickstart = 0;
00594   
00595   SET_BIT(VREFBUF->CSR, VREFBUF_CSR_ENVR);
00596   
00597   /* Get Start Tick*/
00598   tickstart = HAL_GetTick();
00599 
00600   /* Wait for VRR bit  */
00601   while(READ_BIT(VREFBUF->CSR, VREFBUF_CSR_VRR) == RESET)
00602   {
00603     if((HAL_GetTick() - tickstart) > VREFBUF_TIMEOUT_VALUE)
00604     {
00605       return HAL_TIMEOUT;
00606     }
00607   }
00608   
00609   return HAL_OK;
00610 }
00611 
00612 /**
00613   * @brief  Disable the Internal Voltage Reference buffer (VREFBUF).
00614   *
00615   * @retval None
00616   */
00617 void HAL_SYSCFG_DisableVREFBUF(void)
00618 {
00619   CLEAR_BIT(VREFBUF->CSR, VREFBUF_CSR_ENVR);
00620 }
00621 #endif /* VREFBUF */
00622 
00623 /**
00624   * @brief  Enable the I/O analog switch voltage booster
00625   *
00626   * @retval None
00627   */
00628 void HAL_SYSCFG_EnableIOAnalogSwitchBooster(void)
00629 {
00630   SET_BIT(SYSCFG->CFGR1, SYSCFG_CFGR1_BOOSTEN);
00631 }
00632 
00633 /**
00634   * @brief  Disable the I/O analog switch voltage booster
00635   *
00636   * @retval None
00637   */
00638 void HAL_SYSCFG_DisableIOAnalogSwitchBooster(void)
00639 {
00640   CLEAR_BIT(SYSCFG->CFGR1, SYSCFG_CFGR1_BOOSTEN);
00641 }
00642 
00643 /**
00644   * @}
00645   */
00646 
00647 /**
00648   * @}
00649   */
00650 
00651 #endif /* HAL_MODULE_ENABLED */
00652 /**
00653   * @}
00654   */
00655 
00656 /**
00657   * @}
00658   */
00659 
00660 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/