PY32F002B/Drivers/PY32F002B_HAL_Driver/Src/py32f002b_hal_adc.c

/**
  ******************************************************************************
  * @file    py32f002b_hal_adc.c
  * @author  MCU Application Team
  * @brief   This file provides firmware functions to manage the following
  *          functionalities of the Analog to Digital Convertor (ADC)
  *          peripheral:
  *           + Initialization and de-initialization functions
  *             ++ Initialization and Configuration of ADC
  *           + Operation functions
  *             ++ Start, stop, get result of conversions of regular
  *                group, using 3 possible modes: polling, interruption or DMA.
  *           + Control functions
  *             ++ Channels configuration on regular group
  *             ++ Analog Watchdog configuration
  *           + State functions
  *             ++ ADC state machine management
  *             ++ Interrupts and flags management
  *
  @verbatim
  ==============================================================================
                     ##### ADC peripheral features #####
  ==============================================================================
  [..]
  (+) 12-bit, 10-bit, 8-bit or 6-bit configurable resolution

  (+) Interrupt generation at the end of regular conversion and in case of
      analog watchdog or overrun events.

  (+) Single and continuous conversion modes.

  (+) Scan mode for conversion of several channels sequentially.

  (+) Data alignment with in-built data coherency.

  (+) Programmable sampling time (common for all channels)

  (+) ADC conversion of regular group.

  (+) External trigger (timer or EXTI) with configurable polarity

  (+) DMA request generation for transfer of conversions data of regular group.

  (+) ADC calibration

  (+) ADC supply requirements: 2.4 V to 3.6 V at full speed and down to 1.8 V at
      slower speed.

  (+) ADC input range: from Vref- (connected to Vssa) to Vref+ (connected to
      Vdda or to an external voltage reference).
  @endverbatim

  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2023 Puya Semiconductor Co.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by Puya under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "py32f0xx_hal.h"

/** @addtogroup PY32F002B_HAL_Driver
  * @{
  */

/** @defgroup ADC ADC
  * @brief ADC HAL module driver
  * @{
  */

#ifdef HAL_ADC_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @defgroup ADC_Private_Constants ADC Private Constants
  * @{
  */

/* Fixed timeout values for ADC calibration, enable settling time, disable  */
/* settling time.                                                           */
/* Values defined to be higher than worst cases: low clock frequency,       */
/* maximum prescaler.                                                       */
/* Ex of profile low frequency : Clock source at 0.1 MHz, ADC clock         */
/* prescaler 4, sampling time 7.5 ADC clock cycles, resolution 12 bits.     */
/* Unit: ms                                                                 */
#define ADC_ENABLE_TIMEOUT             ( 2U)
#define ADC_DISABLE_TIMEOUT            ( 2U)
#define ADC_STOP_CONVERSION_TIMEOUT    ( 2U)

/* Delay for ADC stabilization time.                                        */
/* Maximum delay is 1us (refer to device datasheet, parameter tSTAB).       */
/* Unit: us                                                                 */
#define ADC_STAB_DELAY_US              ( 1U)

/* Delay for temperature sensor stabilization time.                         */
/* Maximum delay is 10us (refer to device datasheet, parameter tSTART).     */
/* Unit: us                                                                 */
#define ADC_TEMPSENSOR_DELAY_US        ( 10U)

/* Fixed timeout values for ADC calibration, enable settling time, disable  */
/* settling time.                                                           */
/* Values defined to be higher than worst cases: low clock frequency,       */
/* maximum prescaler.                                                       */
/* Ex of profile low frequency : Clock source at 0.1 MHz, ADC clock         */
/* prescaler 4.                                                             */
/* Unit: ms                                                                 */
#define ADC_CALIBRATION_TIMEOUT        ( 2U)

/**
    * @}
    */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup ADC_Private_Functions ADC Private Functions
  * @{
  */
static HAL_StatusTypeDef ADC_Enable(ADC_HandleTypeDef* hadc);
static HAL_StatusTypeDef ADC_Disable(ADC_HandleTypeDef* hadc);
static HAL_StatusTypeDef ADC_ConversionStop(ADC_HandleTypeDef* hadc);
/**
    * @}
    */

/* Exported functions ---------------------------------------------------------*/

/** @defgroup ADC_Exported_Functions ADC Exported Functions
  * @{
  */

/** @defgroup ADC_Exported_Functions_Group1 Initialization/de-initialization functions
 *  @brief    Initialization and Configuration functions
 *
@verbatim
 ===============================================================================
              ##### Initialization and de-initialization functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Initialize and configure the ADC.
      (+) De-initialize the ADC
@endverbatim
  * @{
  */

/**
  * @brief  Initializes the ADC peripheral and regular group according to
  *         parameters specified in structure "ADC_InitTypeDef".
  * @note   As prerequisite, ADC clock must be configured at RCC top level
  *         depending on both possible clock sources: APB clock or HSI clock.
  *         See commented example code below that can be copied and uncommented
  *         into HAL_ADC_MspInit().
  * @note   Possibility to update parameters on the fly:
  *         This function initializes the ADC MSP (HAL_ADC_MspInit()) only when
  *         coming from ADC state reset. Following calls to this function can
  *         be used to reconfigure some parameters of ADC_InitTypeDef
  *         structure on the fly, without modifying MSP configuration. If ADC
  *         MSP has to be modified again, HAL_ADC_DeInit() must be called
  *         before HAL_ADC_Init().
  *         The setting of these parameters is conditioned to ADC state.
  *         For parameters constraints, see comments of structure
  *         "ADC_InitTypeDef".
  * @note   This function configures the ADC within 2 scopes: scope of entire
  *         ADC and scope of regular group. For parameters details, see comments
  *         of structure "ADC_InitTypeDef".
  * @param  hadc ADC handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_Init(ADC_HandleTypeDef* hadc)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;
  uint32_t tmpCFGR1 = 0U;

  /* Check ADC handle */
  if(hadc == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  assert_param(IS_ADC_CLOCKPRESCALER(hadc->Init.ClockPrescaler));
  assert_param(IS_ADC_RESOLUTION(hadc->Init.Resolution));
  assert_param(IS_ADC_DATA_ALIGN(hadc->Init.DataAlign));
  assert_param(IS_ADC_SCAN_MODE(hadc->Init.ScanConvMode));
  assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ContinuousConvMode));
  assert_param(IS_FUNCTIONAL_STATE(hadc->Init.DiscontinuousConvMode));
  assert_param(IS_ADC_EXTTRIG_EDGE(hadc->Init.ExternalTrigConvEdge));
  assert_param(IS_ADC_EXTTRIG(hadc->Init.ExternalTrigConv));
  assert_param(IS_ADC_EOC_SELECTION(hadc->Init.EOCSelection));
  assert_param(IS_ADC_OVERRUN(hadc->Init.Overrun));
  assert_param(IS_FUNCTIONAL_STATE(hadc->Init.LowPowerAutoWait));

  /* As prerequisite, into HAL_ADC_MspInit(), ADC clock must be configured    */
  /* at RCC top level depending on both possible clock sources:               */
  /* APB clock or HSI clock.                                                  */
  /* Refer to header of this file for more details on clock enabling procedure*/

  /* Actions performed only if ADC is coming from state reset:                */
  /* - Initialization of ADC MSP                                              */
  /* - ADC voltage regulator enable                                           */
  if (hadc->State == HAL_ADC_STATE_RESET)
  {
    /* Initialize ADC error code */
    ADC_CLEAR_ERRORCODE(hadc);

    /* Allocate lock resource and initialize it */
    hadc->Lock = HAL_UNLOCKED;

#if (USE_HAL_ADC_REGISTER_CALLBACKS == 1)
    /* Init the ADC Callback settings */
    hadc->ConvCpltCallback              = HAL_ADC_ConvCpltCallback;                 /* Legacy weak callback */
    hadc->ConvHalfCpltCallback          = HAL_ADC_ConvHalfCpltCallback;             /* Legacy weak callback */
    hadc->LevelOutOfWindowCallback      = HAL_ADC_LevelOutOfWindowCallback;         /* Legacy weak callback */
    hadc->ErrorCallback                 = HAL_ADC_ErrorCallback;                    /* Legacy weak callback */

    if (hadc->MspInitCallback == NULL)
    {
      hadc->MspInitCallback = HAL_ADC_MspInit; /* Legacy weak MspInit  */
    }

    /* Init the low level hardware */
    hadc->MspInitCallback(hadc);
#else
    /* Init the low level hardware */
    HAL_ADC_MspInit(hadc);
#endif /* USE_HAL_ADC_REGISTER_CALLBACKS */
  }

  /* Configuration of ADC parameters if previous preliminary actions are      */
  /* correctly completed.                                                     */
  /* and if there is no conversion on going on regular group (ADC can be      */
  /* enabled anyway, in case of call of this function to update a parameter   */
  /* on the fly).                                                             */
  if (HAL_IS_BIT_CLR(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL) &&
      (tmp_hal_status == HAL_OK)                                &&
      (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET)          )
  {
    /* Set ADC state */
    ADC_STATE_CLR_SET(hadc->State,
                      HAL_ADC_STATE_REG_BUSY,
                      HAL_ADC_STATE_BUSY_INTERNAL);

    /* Parameters update conditioned to ADC state:                            */
    /* Parameters that can be updated only when ADC is disabled:              */
    /*  - ADC clock mode                                                      */
    /*  - ADC clock prescaler                                                 */
    /*  - ADC resolution                                                      */
    if (ADC_IS_ENABLE(hadc) == RESET)
    {
      /* Some parameters of this register are not reset, since they are set   */
      /* by other functions and must be kept in case of usage of this         */
      /* function on the fly (update of a parameter of ADC_InitTypeDef        */
      /* without needing to reconfigure all other ADC groups/channels         */
      /* parameters):                                                         */
      /*   - internal measurement paths: temperature sensor, Vref       */
      /*     (set into HAL_ADC_ConfigChannel() )                              */

      /* Configuration of ADC resolution                                      */
      MODIFY_REG(hadc->Instance->CFGR1,
                 ADC_CFGR1_RESSEL,
                 hadc->Init.Resolution );

      /* Configuration of ADC clock mode: clock source AHB or HSI with        */
      /* selectable prescaler                                                 */
      MODIFY_REG(hadc->Instance->CFGR2,
                 ADC_CFGR2_CKMODE,
                 hadc->Init.ClockPrescaler );
    }

    /* Configuration of ADC:                                                  */
    /*  - discontinuous mode                                                  */
    /*  - LowPowerAutoWait mode                                               */
    /*  - continuous conversion mode                                          */
    /*  - overrun                                                             */
    /*  - external trigger to start conversion                                */
    /*  - external trigger polarity                                           */
    /*  - data alignment                                                      */
    /*  - resolution                                                          */
    /*  - scan direction                                                      */
    /*  - DMA continuous request                                              */  
    hadc->Instance->CFGR1 &= ~( ADC_CFGR1_DISCEN  |
                                ADC_CFGR1_CONT    |
                                ADC_CFGR1_OVRMOD  |
                                ADC_CFGR1_EXTSEL  |
                                ADC_CFGR1_EXTEN   |
                                ADC_CFGR1_ALIGN   |
                                ADC_CFGR1_SCANDIR );

    tmpCFGR1 |= (ADC_CFGR1_AUTOWAIT((uint32_t)hadc->Init.LowPowerAutoWait)        |
                 ADC_CFGR1_CONTINUOUS((uint32_t)hadc->Init.ContinuousConvMode)    |
                 ADC_CFGR1_OVERRUN(hadc->Init.Overrun)                            |
                 hadc->Init.DataAlign                                             |
                 ADC_SCANDIR(hadc->Init.ScanConvMode) );


    /* Enable discontinuous mode only if continuous mode is disabled */
    if (hadc->Init.DiscontinuousConvMode == ENABLE)
    {
      if (hadc->Init.ContinuousConvMode == DISABLE)
      {
        /* Enable the selected ADC group regular discontinuous mode */
        tmpCFGR1 |= ADC_CFGR1_DISCEN;
      }
      else
      {
        /* ADC regular group discontinuous was intended to be enabled,        */
        /* but ADC regular group modes continuous and sequencer discontinuous */
        /* cannot be enabled simultaneously.                                  */

        /* Update ADC state machine to error */
        SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

        /* Set ADC error code to ADC IP internal error */
        SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);
      }
    }

    /* Enable external trigger if trigger selection is different of software  */
    /* start.                                                                 */
    /* Note: This configuration keeps the hardware feature of parameter       */
    /*       ExternalTrigConvEdge "trigger edge none" equivalent to           */
    /*       software start.                                                  */
    if (hadc->Init.ExternalTrigConv != ADC_SOFTWARE_START)
    {
      tmpCFGR1 |= ( hadc->Init.ExternalTrigConv    |
                    hadc->Init.ExternalTrigConvEdge );
    }

    /* Update ADC configuration register with previous settings */
    hadc->Instance->CFGR1 |= tmpCFGR1;

    /* Channel sampling time configuration */
    /* Management of parameters "SamplingTimeCommon" and "SamplingTime"       */
    /* (obsolete): sampling time set in this function if parameter            */
    /*  "SamplingTimeCommon" has been set to a valid sampling time.           */
    /* Otherwise, sampling time is set into ADC channel initialization        */
    /* structure with parameter "SamplingTime" (obsolete).                    */
    if (IS_ADC_SAMPLE_TIME(hadc->Init.SamplingTimeCommon))
    {
      /* Channel sampling time configuration */
      /* Clear the old sample time */
      hadc->Instance->SMPR &= ~(ADC_SMPR_SMP);

      /* Set the new sample time */
      hadc->Instance->SMPR |= ADC_SMPR_SET(hadc->Init.SamplingTimeCommon);
    }

    /* Check back that ADC registers have effectively been configured to      */
    /* ensure of no potential problem of ADC core IP clocking.                */
    /* Check through register CFGR1 (excluding analog watchdog configuration: */
    /* set into separate dedicated function, and bits of ADC resolution set   */
    /* out of temporary variable 'tmpCFGR1').                                 */
    if ((hadc->Instance->CFGR1 & ~(ADC_CFGR1_AWDCH | ADC_CFGR1_AWDEN | ADC_CFGR1_AWDSGL | ADC_CFGR1_RESSEL))
        == tmpCFGR1)
    {
      /* Set ADC error code to none */
      ADC_CLEAR_ERRORCODE(hadc);

      /* Set the ADC state */
      ADC_STATE_CLR_SET(hadc->State,
                        HAL_ADC_STATE_BUSY_INTERNAL,
                        HAL_ADC_STATE_READY);
    }
    else
    {
      /* Update ADC state machine to error */
      ADC_STATE_CLR_SET(hadc->State,
                        HAL_ADC_STATE_BUSY_INTERNAL,
                        HAL_ADC_STATE_ERROR_INTERNAL);

      /* Set ADC error code to ADC IP internal error */
      SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);

      tmp_hal_status = HAL_ERROR;
    }

  }
  else
  {
    /* Update ADC state machine to error */
    SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL);

    tmp_hal_status = HAL_ERROR;
  }

  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Deinitialize the ADC peripheral registers to their default reset
  *         values, with deinitialization of the ADC MSP.
  * @note   For devices with several ADCs: reset of ADC common registers is done
  *         only if all ADCs sharing the same common group are disabled.
  *         If this is not the case, reset of these common parameters reset is
  *         bypassed without error reporting: it can be the intended behaviour in
  *         case of reset of a single ADC while the other ADCs sharing the same
  *         common group is still running.
  * @param  hadc ADC handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_DeInit(ADC_HandleTypeDef* hadc)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;

  /* Check ADC handle */
  if(hadc == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Set ADC state */
  SET_BIT(hadc->State, HAL_ADC_STATE_BUSY_INTERNAL);

  /* Stop potential conversion on going, on regular group */
  tmp_hal_status = ADC_ConversionStop(hadc);

  /* Disable ADC peripheral if conversions are effectively stopped */
  if (tmp_hal_status == HAL_OK)
  {
    /* Disable the ADC peripheral */
    tmp_hal_status = ADC_Disable(hadc);

    /* Check if ADC is effectively disabled */
    if (tmp_hal_status != HAL_ERROR)
    {
      /* Change ADC state */
      hadc->State = HAL_ADC_STATE_READY;
    }
  }

  /* Configuration of ADC parameters if previous preliminary actions are      */
  /* correctly completed.                                                     */
  if (tmp_hal_status != HAL_ERROR)
  {

    /* ========== Reset ADC registers ========== */
    /* Reset register IER */
    __HAL_ADC_DISABLE_IT(hadc, (ADC_IT_AWD   | ADC_IT_OVR  |
                                ADC_IT_EOS   | ADC_IT_EOC  |
                                ADC_IT_EOSMP  ) );

    /* Reset register ISR */
    __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_AWD   | ADC_FLAG_OVR  |
                                ADC_FLAG_EOS   | ADC_FLAG_EOC  |
                                ADC_FLAG_EOSMP  ) );

    /* Reset register CR */
    /* Bits ADC_CR_ADCAL, ADC_CR_ADSTP, ADC_CR_ADSTART are in access mode     */
    /* "read-set": no direct reset applicable.                                */

    hadc->Instance->CR &= ~(ADC_CR_VREFBUFF_SEL | ADC_CR_VREF_BUFFERE);
    
    
    /* Reset register CFGR1 */
    hadc->Instance->CFGR1 &= ~(ADC_CFGR1_AWDCH   | ADC_CFGR1_AWDEN  | ADC_CFGR1_AWDSGL | ADC_CFGR1_DISCEN |
                               /*ADC_CFGR1_AUTOFF  |*/ ADC_CFGR1_WAIT   | ADC_CFGR1_CONT   | ADC_CFGR1_OVRMOD |
                               ADC_CFGR1_EXTEN   | ADC_CFGR1_EXTSEL | ADC_CFGR1_ALIGN  | ADC_CFGR1_RESSEL    |
                               ADC_CFGR1_SCANDIR                       );


    /* Reset register CFGR2 */
    /* Note: Update of ADC clock mode is conditioned to ADC state disabled:   */
    /*       already done above.                                              */
    hadc->Instance->CFGR2 &= ~ADC_CFGR2_CKMODE;

    /* Reset register SMPR */
    hadc->Instance->SMPR &= ~ADC_SMPR_SMP;

    /* Reset register TR */
    hadc->Instance->TR &= ~(ADC_TR_HT | ADC_TR_LT);

#if defined(ADC_CHSELR_CHSEL10)
    /* Reset register CHSELR */
    hadc->Instance->CHSELR &= ~(ADC_CHSELR_CHSEL10 | ADC_CHSELR_CHSEL9  | ADC_CHSELR_CHSEL8  |
                                ADC_CHSELR_CHSEL7  | ADC_CHSELR_CHSEL6  | ADC_CHSELR_CHSEL5  | ADC_CHSELR_CHSEL4  |
                                ADC_CHSELR_CHSEL3  | ADC_CHSELR_CHSEL2  | ADC_CHSELR_CHSEL1  | ADC_CHSELR_CHSEL0   );
#else
    /* Reset register CHSELR */
    hadc->Instance->CHSELR &= ~(ADC_CHSELR_CHSEL9  | ADC_CHSELR_CHSEL8  |
                                ADC_CHSELR_CHSEL7  | ADC_CHSELR_CHSEL6  | ADC_CHSELR_CHSEL5  | ADC_CHSELR_CHSEL4  |
                                ADC_CHSELR_CHSEL3  | ADC_CHSELR_CHSEL2  | ADC_CHSELR_CHSEL1  | ADC_CHSELR_CHSEL0   );
#endif

    /* Reset register DR */
    /* bits in access mode read only, no direct reset applicable*/

    /* Reset register CCR */
    ADC->CCR &= ~(ADC_CCR_ALL);

    /* ========== Hard reset ADC peripheral ========== */
    /* Performs a global reset of the entire ADC peripheral: ADC state is     */
    /* forced to a similar state after device power-on.                       */
    /* If needed, copy-paste and uncomment the following reset code into      */
    /* function "void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)":              */
    /*                                                                        */
    /*  __HAL_RCC_ADC1_FORCE_RESET()                                                  */
    /*  __HAL_RCC_ADC1_RELEASE_RESET()                                                */

#if (USE_HAL_ADC_REGISTER_CALLBACKS == 1)
    if (hadc->MspDeInitCallback == NULL)
    {
      hadc->MspDeInitCallback = HAL_ADC_MspDeInit; /* Legacy weak MspDeInit  */
    }

    /* DeInit the low level hardware */
    hadc->MspDeInitCallback(hadc);
#else
    /* DeInit the low level hardware */
    HAL_ADC_MspDeInit(hadc);
#endif /* USE_HAL_ADC_REGISTER_CALLBACKS */

    /* Set ADC error code to none */
    ADC_CLEAR_ERRORCODE(hadc);

    /* Set ADC state */
    hadc->State = HAL_ADC_STATE_RESET;
  }

  /* Process unlocked */
  __HAL_UNLOCK(hadc);

  /* Return function status */
  return tmp_hal_status;
}


/**
  * @brief  Initializes the ADC MSP.
  * @param  hadc ADC handle
  * @retval None
  */
__weak void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hadc);

  /* NOTE : This function should not be modified. When the callback is needed,
            function HAL_ADC_MspInit must be implemented in the user file.
   */
}

/**
  * @brief  DeInitializes the ADC MSP.
  * @param  hadc ADC handle
  * @retval None
  */
__weak void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hadc);

  /* NOTE : This function should not be modified. When the callback is needed,
            function HAL_ADC_MspDeInit must be implemented in the user file.
   */
}

#if (USE_HAL_ADC_REGISTER_CALLBACKS == 1)
/**
  * @brief  Register a User ADC Callback
  *         To be used instead of the weak predefined callback
  * @param  hadc Pointer to a ADC_HandleTypeDef structure that contains
  *                the configuration information for the specified ADC.
  * @param  CallbackID ID of the callback to be registered
  *         This parameter can be one of the following values:
  *          @arg @ref HAL_ADC_CONVERSION_COMPLETE_CB_ID      ADC conversion complete callback ID
  *          @arg @ref HAL_ADC_CONVERSION_HALF_CB_ID          ADC conversion complete callback ID
  *          @arg @ref HAL_ADC_LEVEL_OUT_OF_WINDOW_1_CB_ID    ADC analog watchdog 1 callback ID
  *          @arg @ref HAL_ADC_ERROR_CB_ID                    ADC error callback ID
  *          @arg @ref HAL_ADC_INJ_CONVERSION_COMPLETE_CB_ID  ADC group injected conversion complete callback ID
  *          @arg @ref HAL_ADC_MSPINIT_CB_ID                  ADC Msp Init callback ID
  *          @arg @ref HAL_ADC_MSPDEINIT_CB_ID                ADC Msp DeInit callback ID
  *          @arg @ref HAL_ADC_MSPINIT_CB_ID MspInit callback ID
  *          @arg @ref HAL_ADC_MSPDEINIT_CB_ID MspDeInit callback ID
  * @param  pCallback pointer to the Callback function
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_RegisterCallback(ADC_HandleTypeDef *hadc, HAL_ADC_CallbackIDTypeDef CallbackID, pADC_CallbackTypeDef pCallback)
{
  HAL_StatusTypeDef status = HAL_OK;

  if (pCallback == NULL)
  {
    /* Update the error code */
    hadc->ErrorCode |= HAL_ADC_ERROR_INVALID_CALLBACK;

    return HAL_ERROR;
  }

  if ((hadc->State & HAL_ADC_STATE_READY) != 0)
  {
    switch (CallbackID)
    {
    case HAL_ADC_CONVERSION_COMPLETE_CB_ID :
      hadc->ConvCpltCallback = pCallback;
      break;

    case HAL_ADC_CONVERSION_HALF_CB_ID :
      hadc->ConvHalfCpltCallback = pCallback;
      break;

    case HAL_ADC_LEVEL_OUT_OF_WINDOW_1_CB_ID :
      hadc->LevelOutOfWindowCallback = pCallback;
      break;

    case HAL_ADC_ERROR_CB_ID :
      hadc->ErrorCallback = pCallback;
      break;

    case HAL_ADC_MSPINIT_CB_ID :
      hadc->MspInitCallback = pCallback;
      break;

    case HAL_ADC_MSPDEINIT_CB_ID :
      hadc->MspDeInitCallback = pCallback;
      break;

    default :
      /* Update the error code */
      hadc->ErrorCode |= HAL_ADC_ERROR_INVALID_CALLBACK;

      /* Return error status */
      status = HAL_ERROR;
      break;
    }
  }
  else if (HAL_ADC_STATE_RESET == hadc->State)
  {
    switch (CallbackID)
    {
    case HAL_ADC_MSPINIT_CB_ID :
      hadc->MspInitCallback = pCallback;
      break;

    case HAL_ADC_MSPDEINIT_CB_ID :
      hadc->MspDeInitCallback = pCallback;
      break;

    default :
      /* Update the error code */
      hadc->ErrorCode |= HAL_ADC_ERROR_INVALID_CALLBACK;

      /* Return error status */
      status = HAL_ERROR;
      break;
    }
  }
  else
  {
    /* Update the error code */
    hadc->ErrorCode |= HAL_ADC_ERROR_INVALID_CALLBACK;

    /* Return error status */
    status =  HAL_ERROR;
  }

  return status;
}

/**
  * @brief  Unregister a ADC Callback
  *         ADC callback is redirected to the weak predefined callback
  * @param  hadc Pointer to a ADC_HandleTypeDef structure that contains
  *                the configuration information for the specified ADC.
  * @param  CallbackID ID of the callback to be unregistered
  *         This parameter can be one of the following values:
  *          @arg @ref HAL_ADC_CONVERSION_COMPLETE_CB_ID      ADC conversion complete callback ID
  *          @arg @ref HAL_ADC_CONVERSION_HALF_CB_ID          ADC conversion complete callback ID
  *          @arg @ref HAL_ADC_LEVEL_OUT_OF_WINDOW_1_CB_ID    ADC analog watchdog 1 callback ID
  *          @arg @ref HAL_ADC_ERROR_CB_ID                    ADC error callback ID
  *          @arg @ref HAL_ADC_INJ_CONVERSION_COMPLETE_CB_ID  ADC group injected conversion complete callback ID
  *          @arg @ref HAL_ADC_MSPINIT_CB_ID                  ADC Msp Init callback ID
  *          @arg @ref HAL_ADC_MSPDEINIT_CB_ID                ADC Msp DeInit callback ID
  *          @arg @ref HAL_ADC_MSPINIT_CB_ID MspInit callback ID
  *          @arg @ref HAL_ADC_MSPDEINIT_CB_ID MspDeInit callback ID
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_UnRegisterCallback(ADC_HandleTypeDef *hadc, HAL_ADC_CallbackIDTypeDef CallbackID)
{
  HAL_StatusTypeDef status = HAL_OK;

  if ((hadc->State & HAL_ADC_STATE_READY) != 0)
  {
    switch (CallbackID)
    {
    case HAL_ADC_CONVERSION_COMPLETE_CB_ID :
      hadc->ConvCpltCallback = HAL_ADC_ConvCpltCallback;
      break;

    case HAL_ADC_CONVERSION_HALF_CB_ID :
      hadc->ConvHalfCpltCallback = HAL_ADC_ConvHalfCpltCallback;
      break;

    case HAL_ADC_LEVEL_OUT_OF_WINDOW_1_CB_ID :
      hadc->LevelOutOfWindowCallback = HAL_ADC_LevelOutOfWindowCallback;
      break;

    case HAL_ADC_ERROR_CB_ID :
      hadc->ErrorCallback = HAL_ADC_ErrorCallback;
      break;

    case HAL_ADC_MSPINIT_CB_ID :
      hadc->MspInitCallback = HAL_ADC_MspInit; /* Legacy weak MspInit              */
      break;

    case HAL_ADC_MSPDEINIT_CB_ID :
      hadc->MspDeInitCallback = HAL_ADC_MspDeInit; /* Legacy weak MspDeInit            */
      break;

    default :
      /* Update the error code */
      hadc->ErrorCode |= HAL_ADC_ERROR_INVALID_CALLBACK;

      /* Return error status */
      status =  HAL_ERROR;
      break;
    }
  }
  else if (HAL_ADC_STATE_RESET == hadc->State)
  {
    switch (CallbackID)
    {
    case HAL_ADC_MSPINIT_CB_ID :
      hadc->MspInitCallback = HAL_ADC_MspInit;                   /* Legacy weak MspInit              */
      break;

    case HAL_ADC_MSPDEINIT_CB_ID :
      hadc->MspDeInitCallback = HAL_ADC_MspDeInit;               /* Legacy weak MspDeInit            */
      break;

    default :
      /* Update the error code */
      hadc->ErrorCode |= HAL_ADC_ERROR_INVALID_CALLBACK;

      /* Return error status */
      status =  HAL_ERROR;
      break;
    }
  }
  else
  {
    /* Update the error code */
    hadc->ErrorCode |= HAL_ADC_ERROR_INVALID_CALLBACK;

    /* Return error status */
    status =  HAL_ERROR;
  }

  return status;
}

#endif /* USE_HAL_ADC_REGISTER_CALLBACKS */

/**
  * @}
  */

/** @defgroup ADC_Exported_Functions_Group2 IO operation functions
 *  @brief    IO operation functions
 *
@verbatim
 ===============================================================================
                      ##### IO operation functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Start conversion of regular group.
      (+) Stop conversion of regular group.
      (+) Poll for conversion complete on regular group.
      (+) Poll for conversion event.
      (+) Get result of regular channel conversion.
      (+) Start conversion of regular group and enable interruptions.
      (+) Stop conversion of regular group and disable interruptions.
      (+) Handle ADC interrupt request
      (+) Start conversion of regular group and enable DMA transfer.
      (+) Stop conversion of regular group and disable ADC DMA transfer.
@endverbatim
  * @{
  */

/**
  * @brief  Enables ADC, starts conversion of regular group.
  *         Interruptions enabled in this function: None.
  * @param  hadc ADC handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_Start(ADC_HandleTypeDef* hadc)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Perform ADC enable and conversion start if no conversion is on going */
  if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET)
  {
    /* Process locked */
    __HAL_LOCK(hadc);

    /* Enable the ADC peripheral */
    tmp_hal_status = ADC_Enable(hadc);

    /* Start conversion if ADC is effectively enabled */
    if (tmp_hal_status == HAL_OK)
    {
      /* Set ADC state                                                        */
      /* - Clear state bitfield related to regular group conversion results   */
      /* - Set state bitfield related to regular operation                    */
      ADC_STATE_CLR_SET(hadc->State,
                        HAL_ADC_STATE_READY | HAL_ADC_STATE_REG_EOC | HAL_ADC_STATE_REG_OVR | HAL_ADC_STATE_REG_EOSMP,
                        HAL_ADC_STATE_REG_BUSY);

      /* Reset ADC all error code fields */
      ADC_CLEAR_ERRORCODE(hadc);

      /* Process unlocked */
      /* Unlock before starting ADC conversions: in case of potential         */
      /* interruption, to let the process to ADC IRQ Handler.                 */
      __HAL_UNLOCK(hadc);

      /* Clear regular group conversion flag and overrun flag */
      /* (To ensure of no unknown state from potential previous ADC           */
      /* operations)                                                          */
      __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS | ADC_FLAG_OVR));

      /* Enable conversion of regular group.                                  */
      /* If software start has been selected, conversion starts immediately.  */
      /* If external trigger has been selected, conversion will start at next */
      /* trigger event.                                                       */
      hadc->Instance->CR |= ADC_CR_ADSTART;
    }
  }
  else
  {
    tmp_hal_status = HAL_BUSY;
  }

  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Stop ADC conversion of regular group, disable ADC peripheral.
  * @param  hadc ADC handle
  * @retval HAL status.
  */
HAL_StatusTypeDef HAL_ADC_Stop(ADC_HandleTypeDef* hadc)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Process locked */
  __HAL_LOCK(hadc);

  /* 1. Stop potential conversion on going, on regular group */
  tmp_hal_status = ADC_ConversionStop(hadc);

  /* Disable ADC peripheral if conversions are effectively stopped */
  if (tmp_hal_status == HAL_OK)
  {
    /* 2. Disable the ADC peripheral */
    tmp_hal_status = ADC_Disable(hadc);

    /* Check if ADC is effectively disabled */
    if (tmp_hal_status == HAL_OK)
    {
      /* Set ADC state */
      ADC_STATE_CLR_SET(hadc->State,
                        HAL_ADC_STATE_REG_BUSY,
                        HAL_ADC_STATE_READY);
    }
  }

  /* Process unlocked */
  __HAL_UNLOCK(hadc);

  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Wait for regular group conversion to be completed.
  * @note   ADC conversion flags EOS (end of sequence) and EOC (end of
  *         conversion) are cleared by this function, with an exception:
  *         if low power feature "LowPowerAutoWait" is enabled, flags are
  *         not cleared to not interfere with this feature until data register
  *         is read using function HAL_ADC_GetValue().
  * @note   This function cannot be used in a particular setup: ADC configured
  *         in DMA mode and polling for end of each conversion (ADC init
  *         parameter "EOCSelection" set to ADC_EOC_SINGLE_CONV).
  *         In this case, DMA resets the flag EOC and polling cannot be
  *         performed on each conversion. Nevertheless, polling can still
  *         be performed on the complete sequence (ADC init
  *         parameter "EOCSelection" set to ADC_EOC_SEQ_CONV).
  * @note   Depending on devices and packages, DMA may not be available.
  *         Refer to device datasheet for DMA availability.
  * @param  hadc ADC handle
  * @param  Timeout Timeout value in millisecond.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_PollForConversion(ADC_HandleTypeDef* hadc, uint32_t Timeout)
{
  uint32_t tickstart;
  uint32_t tmp_Flag_EOC;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* If end of conversion selected to end of sequence */
  if (hadc->Init.EOCSelection == ADC_EOC_SEQ_CONV)
  {
    tmp_Flag_EOC = ADC_FLAG_EOS;
  }
  /* If end of conversion selected to end of each conversion */
  else /* ADC_EOC_SINGLE_CONV */
  {
    /* Verification that ADC configuration is compliant with polling for      */
    /* each conversion:                                                       */
    /* Particular case is ADC configured in DMA mode and ADC sequencer with   */
    /* several ranks and polling for end of each conversion.                  */
    /* For code simplicity sake, this particular case is generalized to       */
    /* ADC configured in DMA mode and and polling for end of each conversion. */
#if (defined(DMA) || defined(DMA1))
    if (HAL_IS_BIT_SET(hadc->Instance->CFGR1, ADC_CFGR1_DMAEN))
    {
      /* Update ADC state machine to error */
      SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

      /* Process unlocked */
      __HAL_UNLOCK(hadc);

      return HAL_ERROR;
    }
    else
    {
#endif
    tmp_Flag_EOC = (ADC_FLAG_EOC | ADC_FLAG_EOS);
#if (defined(DMA) || defined(DMA1))
    }
#endif
  }

  /* Get tick count */
  tickstart = HAL_GetTick();

  /* Wait until End of Conversion flag is raised */
  while(HAL_IS_BIT_CLR(hadc->Instance->ISR, tmp_Flag_EOC))
  {
    /* Check if timeout is disabled (set to infinite wait) */
    if(Timeout != HAL_MAX_DELAY)
    {
      if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
      {
        /* Update ADC state machine to timeout */
        SET_BIT(hadc->State, HAL_ADC_STATE_TIMEOUT);

        /* Process unlocked */
        __HAL_UNLOCK(hadc);

        return HAL_TIMEOUT;
      }
    }
  }

  /* Update ADC state machine */
  SET_BIT(hadc->State, HAL_ADC_STATE_REG_EOC);

  /* Determine whether any further conversion upcoming on group regular       */
  /* by external trigger, continuous mode or scan sequence on going.          */
  if(ADC_IS_SOFTWARE_START_REGULAR(hadc)        &&
      (hadc->Init.ContinuousConvMode == DISABLE)   )
  {
    /* If End of Sequence is reached, disable interrupts */
    if( __HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) )
    {
      /* Allowed to modify bits ADC_IT_EOC/ADC_IT_EOS only if bit             */
      /* ADSTART==0 (no conversion on going)                                  */
      if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET)
      {
        /* Disable ADC end of single conversion interrupt on group regular */
        /* Note: Overrun interrupt was enabled with EOC interrupt in          */
        /* HAL_Start_IT(), but is not disabled here because can be used       */
        /* by overrun IRQ process below.                                      */
        __HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC | ADC_IT_EOS);

        /* Set ADC state */
        ADC_STATE_CLR_SET(hadc->State,
                          HAL_ADC_STATE_REG_BUSY,
                          HAL_ADC_STATE_READY);
      }
      else
      {
        /* Change ADC state to error state */
        SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

        /* Set ADC error code to ADC IP internal error */
        SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);
      }
    }
  }

  /* Clear end of conversion flag of regular group if low power feature       */
  /* "LowPowerAutoWait " is disabled, to not interfere with this feature      */
  /* until data register is read using function HAL_ADC_GetValue().           */
  if (hadc->Init.LowPowerAutoWait == DISABLE)
  {
    /* Clear regular group conversion flag */
    __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS));
  }

  /* Return ADC state */
  return HAL_OK;
}

/**
  * @brief  Poll for conversion event.
  * @param  hadc ADC handle
  * @param  EventType the ADC event type.
  *          This parameter can be one of the following values:
  *            @arg ADC_AWD_EVENT: ADC Analog watchdog event
  *            @arg ADC_OVR_EVENT: ADC Overrun event
  * @param  Timeout Timeout value in millisecond.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_PollForEvent(ADC_HandleTypeDef* hadc, uint32_t EventType, uint32_t Timeout)
{
  uint32_t tickstart=0;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  assert_param(IS_ADC_EVENT_TYPE(EventType));

  /* Get tick count */
  tickstart = HAL_GetTick();

  /* Check selected event flag */
  while(__HAL_ADC_GET_FLAG(hadc, EventType) == RESET)
  {
    /* Check if timeout is disabled (set to infinite wait) */
    if(Timeout != HAL_MAX_DELAY)
    {
      if((Timeout == 0U) || ((HAL_GetTick()-tickstart) > Timeout))
      {
        /* Update ADC state machine to timeout */
        SET_BIT(hadc->State, HAL_ADC_STATE_TIMEOUT);

        /* Process unlocked */
        __HAL_UNLOCK(hadc);

        return HAL_TIMEOUT;
      }
    }
  }

  switch(EventType)
  {
  /* Analog watchdog (level out of window) event */
  case ADC_AWD_EVENT:
    /* Set ADC state */
    SET_BIT(hadc->State, HAL_ADC_STATE_AWD1);

    /* Clear ADC analog watchdog flag */
    __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_AWD);
    break;

  /* Overrun event */
  default: /* Case ADC_OVR_EVENT */
    /* If overrun is set to overwrite previous data, overrun event is not     */
    /* considered as an error.                                                */
    /* (cf ref manual "Managing conversions without using the DMA and without */
    /* overrun ")                                                             */
    if (hadc->Init.Overrun == ADC_OVR_DATA_PRESERVED)
    {
      /* Set ADC state */
      SET_BIT(hadc->State, HAL_ADC_STATE_REG_OVR);

      /* Set ADC error code to overrun */
      SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_OVR);
    }

    /* Clear ADC Overrun flag */
    __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR);
    break;
  }

  /* Return ADC state */
  return HAL_OK;
}

/**
  * @brief  Enables ADC, starts conversion of regular group with interruption.
  *         Interruptions enabled in this function:
  *          - EOC (end of conversion of regular group) or EOS (end of
  *            sequence of regular group) depending on ADC initialization
  *            parameter "EOCSelection"
  *          - overrun (if available)
  *         Each of these interruptions has its dedicated callback function.
  * @param  hadc ADC handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_Start_IT(ADC_HandleTypeDef* hadc)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Perform ADC enable and conversion start if no conversion is on going */
  if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET)
  {
    /* Process locked */
    __HAL_LOCK(hadc);

    /* Enable the ADC peripheral */
    tmp_hal_status = ADC_Enable(hadc);

    /* Start conversion if ADC is effectively enabled */
    if (tmp_hal_status == HAL_OK)
    {
      /* Set ADC state                                                        */
      /* - Clear state bitfield related to regular group conversion results   */
      /* - Set state bitfield related to regular operation                    */
      ADC_STATE_CLR_SET(hadc->State,
                        HAL_ADC_STATE_READY | HAL_ADC_STATE_REG_EOC | HAL_ADC_STATE_REG_OVR | HAL_ADC_STATE_REG_EOSMP,
                        HAL_ADC_STATE_REG_BUSY);

      /* Reset ADC all error code fields */
      ADC_CLEAR_ERRORCODE(hadc);

      /* Process unlocked */
      /* Unlock before starting ADC conversions: in case of potential         */
      /* interruption, to let the process to ADC IRQ Handler.                 */
      __HAL_UNLOCK(hadc);

      /* Clear regular group conversion flag and overrun flag */
      /* (To ensure of no unknown state from potential previous ADC           */
      /* operations)                                                          */
      __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS | ADC_FLAG_OVR));

      /* Enable ADC end of conversion interrupt */
      /* Enable ADC overrun interrupt */
      switch(hadc->Init.EOCSelection)
      {
      case ADC_EOC_SEQ_CONV:
        __HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC);
        __HAL_ADC_ENABLE_IT(hadc, (ADC_IT_EOS | ADC_IT_OVR));
        break;
      /* case ADC_EOC_SINGLE_CONV */
      default:
        __HAL_ADC_ENABLE_IT(hadc, (ADC_IT_EOC | ADC_IT_EOS | ADC_IT_OVR));
        break;
      }

      /* Enable conversion of regular group.                                  */
      /* If software start has been selected, conversion starts immediately.  */
      /* If external trigger has been selected, conversion will start at next */
      /* trigger event.                                                       */
      hadc->Instance->CR |= ADC_CR_ADSTART;
    }
  }
  else
  {
    tmp_hal_status = HAL_BUSY;
  }

  /* Return function status */
  return tmp_hal_status;
}


/**
  * @brief  Stop ADC conversion of regular group, disable interruption of
  *         end-of-conversion, disable ADC peripheral.
  * @param  hadc ADC handle
  * @retval HAL status.
  */
HAL_StatusTypeDef HAL_ADC_Stop_IT(ADC_HandleTypeDef* hadc)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Process locked */
  __HAL_LOCK(hadc);

  /* 1. Stop potential conversion on going, on regular group */
  tmp_hal_status = ADC_ConversionStop(hadc);

  /* Disable ADC peripheral if conversions are effectively stopped */
  if (tmp_hal_status == HAL_OK)
  {
    /* Disable ADC end of conversion interrupt for regular group */
    /* Disable ADC overrun interrupt */
    __HAL_ADC_DISABLE_IT(hadc, (ADC_IT_EOC | ADC_IT_EOS | ADC_IT_OVR));

    /* 2. Disable the ADC peripheral */
    tmp_hal_status = ADC_Disable(hadc);

    /* Check if ADC is effectively disabled */
    if (tmp_hal_status == HAL_OK)
    {
      /* Set ADC state */
      ADC_STATE_CLR_SET(hadc->State,
                        HAL_ADC_STATE_REG_BUSY,
                        HAL_ADC_STATE_READY);
    }
  }

  /* Process unlocked */
  __HAL_UNLOCK(hadc);

  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Get ADC regular group conversion result.
  * @note   Reading register DR automatically clears ADC flag EOC
  *         (ADC group regular end of unitary conversion).
  * @note   This function does not clear ADC flag EOS
  *         (ADC group regular end of sequence conversion).
  *         Occurrence of flag EOS rising:
  *          - If sequencer is composed of 1 rank, flag EOS is equivalent
  *            to flag EOC.
  *          - If sequencer is composed of several ranks, during the scan
  *            sequence flag EOC only is raised, at the end of the scan sequence
  *            both flags EOC and EOS are raised.
  *         To clear this flag, either use function:
  *         in programming model IT: @ref HAL_ADC_IRQHandler(), in programming
  *         model polling: @ref HAL_ADC_PollForConversion()
  *         or @ref __HAL_ADC_CLEAR_FLAG(&hadc, ADC_FLAG_EOS).
  * @param  hadc ADC handle
  * @retval ADC group regular conversion data
  */
uint32_t HAL_ADC_GetValue(ADC_HandleTypeDef* hadc)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Note: EOC flag is not cleared here by software because automatically     */
  /*       cleared by hardware when reading register DR.                      */

  /* Return ADC converted value */
  return hadc->Instance->DR;
}

/**
  * @brief  Handles ADC interrupt request.
  * @param  hadc ADC handle
  * @retval None
  */
void HAL_ADC_IRQHandler(ADC_HandleTypeDef* hadc)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ContinuousConvMode));
  assert_param(IS_ADC_EOC_SELECTION(hadc->Init.EOCSelection));

  /* ========== Check End of Conversion flag for regular group ========== */
  if( (__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOC) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_EOC)) ||
      (__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_EOS))   )
  {
    /* Update state machine on conversion status if not in error state */
    if (HAL_IS_BIT_CLR(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL))
    {
      /* Set ADC state */
      SET_BIT(hadc->State, HAL_ADC_STATE_REG_EOC);
    }

    /* Determine whether any further conversion upcoming on group regular     */
    /* by external trigger, continuous mode or scan sequence on going.        */
    if(ADC_IS_SOFTWARE_START_REGULAR(hadc)        &&
        (hadc->Init.ContinuousConvMode == DISABLE)   )
    {
      /* If End of Sequence is reached, disable interrupts */
      if( __HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) )
      {
        /* Allowed to modify bits ADC_IT_EOC/ADC_IT_EOS only if bit           */
        /* ADSTART==0 (no conversion on going)                                */
        if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET)
        {
          /* Disable ADC end of single conversion interrupt on group regular */
          /* Note: Overrun interrupt was enabled with EOC interrupt in        */
          /* HAL_Start_IT(), but is not disabled here because can be used     */
          /* by overrun IRQ process below.                                    */
          __HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC | ADC_IT_EOS);

          /* Set ADC state */
          ADC_STATE_CLR_SET(hadc->State,
                            HAL_ADC_STATE_REG_BUSY,
                            HAL_ADC_STATE_READY);
        }
        else
        {
          /* Change ADC state to error state */
          SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

          /* Set ADC error code to ADC IP internal error */
          SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);
        }
      }
    }

    /* Note: into callback, to determine if conversion has been triggered     */
    /*       from EOC or EOS, possibility to use:                             */
    /*        " if( __HAL_ADC_GET_FLAG(&hadc, ADC_FLAG_EOS)) "                */
#if (USE_HAL_ADC_REGISTER_CALLBACKS == 1)
    hadc->ConvCpltCallback(hadc);
#else
    HAL_ADC_ConvCpltCallback(hadc);
#endif /* USE_HAL_ADC_REGISTER_CALLBACKS */


    /* Clear regular group conversion flag */
    /* Note: in case of overrun set to ADC_OVR_DATA_PRESERVED, end of         */
    /*       conversion flags clear induces the release of the preserved data.*/
    /*       Therefore, if the preserved data value is needed, it must be     */
    /*       read preliminarily into HAL_ADC_ConvCpltCallback().              */
    __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS) );
  }

  /* ========== Check Analog watchdog flags ========== */
  if(__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_AWD) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_AWD))
  {
    /* Set ADC state */
    SET_BIT(hadc->State, HAL_ADC_STATE_AWD1);

#if (USE_HAL_ADC_REGISTER_CALLBACKS == 1)
    hadc->LevelOutOfWindowCallback(hadc);
#else
    HAL_ADC_LevelOutOfWindowCallback(hadc);
#endif /* USE_HAL_ADC_REGISTER_CALLBACKS */

    /* Clear ADC Analog watchdog flag */
    __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_AWD);

  }


  /* ========== Check Overrun flag ========== */
  if(__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_OVR) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_OVR))
  {
    /* If overrun is set to overwrite previous data (default setting),        */
    /* overrun event is not considered as an error.                           */
    /* (cf ref manual "Managing conversions without using the DMA and without */
    /* overrun ")                                                             */
    /* Exception for usage with DMA overrun event always considered as an     */
    /* error.                                                                 */
#if (defined(DMA) || defined(DMA1))    
    if ((hadc->Init.Overrun == ADC_OVR_DATA_PRESERVED)            ||
        HAL_IS_BIT_SET(hadc->Instance->CFGR1, ADC_CFGR1_DMAEN)  )
#else
    if (hadc->Init.Overrun == ADC_OVR_DATA_PRESERVED)
#endif
    {
      /* Set ADC error code to overrun */
      SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_OVR);

      /* Clear ADC overrun flag */
      __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR);

#if (USE_HAL_ADC_REGISTER_CALLBACKS == 1)
      hadc->ErrorCallback(hadc);
#else
      HAL_ADC_ErrorCallback(hadc);
#endif /* USE_HAL_ADC_REGISTER_CALLBACKS */
    }

    /* Clear the Overrun flag */
    __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR);
  }

}

/**
  * @brief  Conversion complete callback in non blocking mode
  * @param  hadc ADC handle
  * @retval None
  */
__weak void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hadc);

  /* NOTE : This function should not be modified. When the callback is needed,
            function HAL_ADC_ConvCpltCallback must be implemented in the user file.
   */
}

/**
  * @brief  Conversion DMA half-transfer callback in non blocking mode
  * @param  hadc ADC handle
  * @retval None
  */
__weak void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hadc);

  /* NOTE : This function should not be modified. When the callback is needed,
            function HAL_ADC_ConvHalfCpltCallback must be implemented in the user file.
  */
}

/**
  * @brief  Analog watchdog callback in non blocking mode.
  * @param  hadc ADC handle
  * @retval None
  */
__weak void HAL_ADC_LevelOutOfWindowCallback(ADC_HandleTypeDef* hadc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hadc);

  /* NOTE : This function should not be modified. When the callback is needed,
            function HAL_ADC_LevelOoutOfWindowCallback must be implemented in the user file.
  */
}

/**
  * @brief  ADC error callback in non blocking mode
  *        (ADC conversion with interruption or transfer by DMA)
  * @param  hadc ADC handle
  * @retval None
  */
__weak void HAL_ADC_ErrorCallback(ADC_HandleTypeDef *hadc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hadc);

  /* NOTE : This function should not be modified. When the callback is needed,
            function HAL_ADC_ErrorCallback must be implemented in the user file.
  */
}


/**
  * @}
  */

/** @defgroup ADC_Exported_Functions_Group3 Peripheral Control functions
 *  @brief    Peripheral Control functions
 *
@verbatim
 ===============================================================================
             ##### Peripheral Control functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Configure channels on regular group
      (+) Configure the analog watchdog

@endverbatim
  * @{
  */

/**
  * @brief  Configures the the selected channel to be linked to the regular
  *         group.
  * @note   In case of usage of internal measurement channels:
  *         VrefInt/TempSensor.
  *         Sampling time constraints must be respected (sampling time can be
  *         adjusted in function of ADC clock frequency and sampling time
  *         setting).
  *         Refer to device datasheet for timings values, parameters TS_vrefint,
  *         TS_temp (values rough order: 5us to 17us).
  *         These internal paths can be be disabled using function
  *         HAL_ADC_DeInit().
  * @note   Possibility to update parameters on the fly:
  *         This function initializes channel into regular group, following
  *         calls to this function can be used to reconfigure some parameters
  *         of structure "ADC_ChannelConfTypeDef" on the fly, without reseting
  *         the ADC.
  *         The setting of these parameters is conditioned to ADC state.
  *         For parameters constraints, see comments of structure
  *         "ADC_ChannelConfTypeDef".
  * @param  hadc ADC handle
  * @param  sConfig Structure of ADC channel for regular group.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_ConfigChannel(ADC_HandleTypeDef* hadc, ADC_ChannelConfTypeDef* sConfig)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;
  __IO uint32_t wait_loop_index = 0U;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  assert_param(IS_ADC_CHANNEL(sConfig->Channel));
  assert_param(IS_ADC_RANK(sConfig->Rank));

  if (! IS_ADC_SAMPLE_TIME(hadc->Init.SamplingTimeCommon))
  {
    assert_param(IS_ADC_SAMPLE_TIME(sConfig->SamplingTime));
  }

  /* Process locked */
  __HAL_LOCK(hadc);

  /* Parameters update conditioned to ADC state:                              */
  /* Parameters that can be updated when ADC is disabled or enabled without   */
  /* conversion on going on regular group:                                    */
  /*  - Channel number                                                        */
  /*  - Channel sampling time                                                 */
  /*  - Management of internal measurement channels: VrefInt/TempSensor  */
  if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET)
  {
    /* Configure channel: depending on rank setting, add it or remove it from */
    /* ADC conversion sequencer.                                              */
    if (sConfig->Rank != ADC_RANK_NONE)
    {
      /* Regular sequence configuration */
      /* Set the channel selection register from the selected channel */
      hadc->Instance->CHSELR |= ADC_CHSELR_CHANNEL(sConfig->Channel);

      /* Channel sampling time configuration */
      /* Management of parameters "SamplingTimeCommon" and "SamplingTime"     */
      /* (obsolete): sampling time set in this function with                  */
      /* parameter "SamplingTime" (obsolete) only if not already set into     */
      /* ADC initialization structure with parameter "SamplingTimeCommon".    */
      if (! IS_ADC_SAMPLE_TIME(hadc->Init.SamplingTimeCommon))
      {
        /* Modify sampling time if needed (not needed in case of reoccurrence */
        /* for several channels programmed consecutively into the sequencer)  */
        if (sConfig->SamplingTime != ADC_GET_SAMPLINGTIME(hadc))
        {
          /* Channel sampling time configuration */
          /* Clear the old sample time */
          hadc->Instance->SMPR &= ~(ADC_SMPR_SMP);

          /* Set the new sample time */
          hadc->Instance->SMPR |= ADC_SMPR_SET(sConfig->SamplingTime);
        }
      }

      /* Management of internal measurement channels: VrefInt/TempSensor */
      /* internal measurement paths enable: If internal channel selected,     */
      /* enable dedicated internal buffers and path.                          */
      /* Note: these internal measurement paths can be disabled using         */
      /*       HAL_ADC_DeInit() or removing the channel from sequencer with   */
      /*       channel configuration parameter "Rank".                        */
      if(ADC_IS_CHANNEL_INTERNAL(sConfig->Channel))
      {
        /* If Channel_8 is selected, enable Temp. sensor measurement path. */
        /* If Channel_9 is selected, enable VREFINT measurement path. */

        ADC->CCR |= ADC_CHANNEL_INTERNAL_PATH(sConfig->Channel);

        /* If Temp. sensor is selected, wait for stabilization delay */
        if (sConfig->Channel == ADC_CHANNEL_TEMPSENSOR)
        {
          /* Delay for temperature sensor stabilization time */
          /* Compute number of CPU cycles to wait for */
          wait_loop_index = (ADC_TEMPSENSOR_DELAY_US * (SystemCoreClock / 1000000U));
          while(wait_loop_index != 0U)
          {
            wait_loop_index--;
          }
        }
      }
    }
    else
    {
      /* Regular sequence configuration */
      /* Reset the channel selection register from the selected channel */
      hadc->Instance->CHSELR &= ~ADC_CHSELR_CHANNEL(sConfig->Channel);

      /* Management of internal measurement channels: VrefInt/TempSensor */
      /* internal measurement paths disable: If internal channel selected,    */
      /* disable dedicated internal buffers and path.                         */
      if(ADC_IS_CHANNEL_INTERNAL(sConfig->Channel))
      {
        ADC->CCR &= ~ADC_CHANNEL_INTERNAL_PATH(sConfig->Channel);
      }
    }
  }

  /* If a conversion is on going on regular group, no update on regular       */
  /* channel could be done on neither of the channel configuration structure  */
  /* parameters.                                                              */
  else
  {
    /* Update ADC state machine to error */
    SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

    tmp_hal_status = HAL_ERROR;
  }

  /* Process unlocked */
  __HAL_UNLOCK(hadc);

  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Configures the the ADC VrefBuf
  * @param  hadc: ADC handle
  * @param  VrefBuf the ADC VrefBuf.
  *          This parameter can be one of the following values:
  *            @arg ADC_VREFBUF_VCCA: VCCA
  *            @arg ADC_VREFBUF_1P5V: 1P5V
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_ConfigVrefBuf(ADC_HandleTypeDef* hadc, uint32_t VrefBuf)
{ 
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;
 
  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  assert_param(IS_ADC_VREFBUF(VrefBuf));
 
  /* Process locked */
  __HAL_LOCK(hadc);
  
  MODIFY_REG(hadc->Instance->CR, ADC_CR_VREF_BUFFERE | ADC_CR_VREFBUFF_SEL ,VrefBuf);
  
  if(VrefBuf != ADC_VREFBUF_VCCA)
  {
    SET_BIT(ADC->CCR,ADC_CCR_VREFEN);
  }
  /* Process unlocked */
  __HAL_UNLOCK(hadc);
  
  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Configures the analog watchdog.
  * @note   Possibility to update parameters on the fly:
  *         This function initializes the selected analog watchdog, following
  *         calls to this function can be used to reconfigure some parameters
  *         of structure "ADC_AnalogWDGConfTypeDef" on the fly, without reseting
  *         the ADC.
  *         The setting of these parameters is conditioned to ADC state.
  *         For parameters constraints, see comments of structure
  *         "ADC_AnalogWDGConfTypeDef".
  * @param  hadc ADC handle
  * @param  AnalogWDGConfig Structure of ADC analog watchdog configuration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_AnalogWDGConfig(ADC_HandleTypeDef* hadc, ADC_AnalogWDGConfTypeDef* AnalogWDGConfig)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;

  uint32_t tmpAWDHighThresholdShifted;
  uint32_t tmpAWDLowThresholdShifted;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  assert_param(IS_ADC_ANALOG_WATCHDOG_MODE(AnalogWDGConfig->WatchdogMode));
  assert_param(IS_FUNCTIONAL_STATE(AnalogWDGConfig->ITMode));

  /* Verify if threshold is within the selected ADC resolution */
  assert_param(IS_ADC_RANGE(ADC_GET_RESOLUTION(hadc), AnalogWDGConfig->HighThreshold));
  assert_param(IS_ADC_RANGE(ADC_GET_RESOLUTION(hadc), AnalogWDGConfig->LowThreshold));

  if(AnalogWDGConfig->WatchdogMode == ADC_ANALOGWATCHDOG_SINGLE_REG)
  {
    assert_param(IS_ADC_CHANNEL(AnalogWDGConfig->Channel));
  }

  /* Process locked */
  __HAL_LOCK(hadc);

  /* Parameters update conditioned to ADC state:                              */
  /* Parameters that can be updated when ADC is disabled or enabled without   */
  /* conversion on going on regular group:                                    */
  /*  - Analog watchdog channels                                              */
  /*  - Analog watchdog thresholds                                            */
  if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET)
  {
    /* Configuration of analog watchdog:                                      */
    /*  - Set the analog watchdog enable mode: one or overall group of        */
    /*    channels.                                                           */
    /*  - Set the Analog watchdog channel (is not used if watchdog            */
    /*    mode "all channels": ADC_CFGR_AWD1SGL=0).                           */
    hadc->Instance->CFGR1 &= ~( ADC_CFGR1_AWDSGL |
                                ADC_CFGR1_AWDEN  |
                                ADC_CFGR1_AWDCH   );

    hadc->Instance->CFGR1 |= ( AnalogWDGConfig->WatchdogMode            |
                               ADC_CFGR_AWDCH(AnalogWDGConfig->Channel)  );

    /* Shift the offset in function of the selected ADC resolution: Thresholds*/
    /* have to be left-aligned on bit 11, the LSB (right bits) are set to 0   */
    tmpAWDHighThresholdShifted = ADC_AWD1THRESHOLD_SHIFT_RESOLUTION(hadc, AnalogWDGConfig->HighThreshold);
    tmpAWDLowThresholdShifted  = ADC_AWD1THRESHOLD_SHIFT_RESOLUTION(hadc, AnalogWDGConfig->LowThreshold);

    /* Set the high and low thresholds */
    hadc->Instance->TR &= ~(ADC_TR_HT | ADC_TR_LT);
    hadc->Instance->TR |=  ( ADC_TRX_HIGHTHRESHOLD (tmpAWDHighThresholdShifted) |
                             tmpAWDLowThresholdShifted                           );

    /* Clear the ADC Analog watchdog flag (in case of left enabled by         */
    /* previous ADC operations) to be ready to use for HAL_ADC_IRQHandler()   */
    /* or HAL_ADC_PollForEvent().                                             */
    __HAL_ADC_CLEAR_FLAG(hadc, ADC_IT_AWD);

    /* Configure ADC Analog watchdog interrupt */
    if(AnalogWDGConfig->ITMode == ENABLE)
    {
      /* Enable the ADC Analog watchdog interrupt */
      __HAL_ADC_ENABLE_IT(hadc, ADC_IT_AWD);
    }
    else
    {
      /* Disable the ADC Analog watchdog interrupt */
      __HAL_ADC_DISABLE_IT(hadc, ADC_IT_AWD);
    }

  }
  /* If a conversion is on going on regular group, no update could be done    */
  /* on neither of the AWD configuration structure parameters.                */
  else
  {
    /* Update ADC state machine to error */
    SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

    tmp_hal_status = HAL_ERROR;
  }


  /* Process unlocked */
  __HAL_UNLOCK(hadc);

  /* Return function status */
  return tmp_hal_status;
}


/**
  * @}
  */


/** @defgroup ADC_Exported_Functions_Group4 Peripheral State functions
 *  @brief    Peripheral State functions
 *
@verbatim
 ===============================================================================
            ##### Peripheral State and Errors functions #####
 ===============================================================================
    [..]
    This subsection provides functions to get in run-time the status of the
    peripheral.
      (+) Check the ADC state
      (+) Check the ADC error code

@endverbatim
  * @{
  */

/**
  * @brief  Return the ADC state
  * @note   ADC state machine is managed by bitfields, ADC status must be
  *         compared with states bits.
  *         For example:
  *           " if (HAL_IS_BIT_SET(HAL_ADC_GetState(hadc1), HAL_ADC_STATE_REG_BUSY)) "
  *           " if (HAL_IS_BIT_SET(HAL_ADC_GetState(hadc1), HAL_ADC_STATE_AWD1)    ) "
  * @param  hadc ADC handle
  * @retval HAL state
  */
uint32_t HAL_ADC_GetState(ADC_HandleTypeDef* hadc)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Return ADC state */
  return hadc->State;
}

/**
  * @brief  Return the ADC error code
  * @param  hadc ADC handle
  * @retval ADC Error Code
  */
uint32_t HAL_ADC_GetError(ADC_HandleTypeDef *hadc)
{
  return hadc->ErrorCode;
}

/**
  * @}
  */

/**
  * @}
  */

/** @defgroup ADC_Private_Functions ADC Private Functions
  * @{
  */

/**
  * @brief  Enable the selected ADC.
  * @note   Prerequisite condition to use this function: ADC must be disabled
  *         and voltage regulator must be enabled (done into HAL_ADC_Init()).
  * @param  hadc ADC handle
  * @retval HAL status.
  */
static HAL_StatusTypeDef ADC_Enable(ADC_HandleTypeDef* hadc)
{
  __IO uint32_t wait_loop_index = 0U;

  /* ADC enable and wait for ADC ready (in case of ADC is disabled or         */
  /* enabling phase not yet completed: flag ADC ready not yet set).           */
  /* Timeout implemented to not be stuck if ADC cannot be enabled (possible   */
  /* causes: ADC clock not running, ...).                                     */
  if (ADC_IS_ENABLE(hadc) == RESET)
  {
    /* Check if conditions to enable the ADC are fulfilled */
    if (ADC_ENABLING_CONDITIONS(hadc) == RESET)
    {
      /* Update ADC state machine to error */
      SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL);

      /* Set ADC error code to ADC IP internal error */
      SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);

      return HAL_ERROR;
    }

    /* Enable the ADC peripheral */
    __HAL_ADC_ENABLE(hadc);

    /* Delay for ADC stabilization time */
    /* Compute number of CPU cycles to wait for */
    wait_loop_index = (ADC_STAB_DELAY_US * (SystemCoreClock / 1000000U));
    while(wait_loop_index != 0U)
    {
      wait_loop_index--;
    }
  }

  /* Return HAL status */
  return HAL_OK;
}

/**
  * @brief  Disable the selected ADC.
  * @note   Prerequisite condition to use this function: ADC conversions must be
  *         stopped.
  * @param  hadc ADC handle
  * @retval HAL status.
  */
static HAL_StatusTypeDef ADC_Disable(ADC_HandleTypeDef* hadc)
{
  uint32_t tickstart = 0U;

  /* Verification if ADC is not already disabled:                             */
  /* Note: forbidden to disable ADC if ADC is already  */
  /*       disabled.                                                          */
  if (ADC_IS_ENABLE(hadc) != RESET)
  {
    /* Check if conditions to disable the ADC are fulfilled */
    if (ADC_DISABLING_CONDITIONS(hadc) != RESET)
    {
      /* Disable the ADC peripheral */
      __HAL_ADC_DISABLE(hadc);
    }
    else
    {
      /* Update ADC state machine to error */
      SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL);

      /* Set ADC error code to ADC IP internal error */
      SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);

      return HAL_ERROR;
    }

    /* Wait for ADC effectively disabled */
    /* Get tick count */
    tickstart = HAL_GetTick();

    while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADEN))
    {
      if((HAL_GetTick() - tickstart) > ADC_DISABLE_TIMEOUT)
      {
        /* Update ADC state machine to error */
        SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL);

        /* Set ADC error code to ADC IP internal error */
        SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);

        return HAL_ERROR;
      }
    }
  }

  /* Return HAL status */
  return HAL_OK;
}


/**
  * @brief  Stop ADC conversion.
  * @note   Prerequisite condition to use this function: ADC conversions must be
  *         stopped to disable the ADC.
  * @param  hadc ADC handle
  * @retval HAL status.
  */
static HAL_StatusTypeDef ADC_ConversionStop(ADC_HandleTypeDef* hadc)
{
  uint32_t tickstart = 0U;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Verification if ADC is not already stopped on regular group to bypass    */
  /* this function if not needed.                                             */
  if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc))
  {
    /* Stop potential conversion on going on regular group */
    /* Software is allowed to set ADSTP only when ADSTART=1 */
    if (HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADSTART) &&
        HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADEN))
    {
      /* Stop conversions on regular group */
      hadc->Instance->CR |= ADC_CR_ADSTP;
    }

    /* Wait for conversion effectively stopped */
    /* Get tick count */
    tickstart = HAL_GetTick();

    while((hadc->Instance->CR & ADC_CR_ADSTART) != RESET)
    {
      if((HAL_GetTick() - tickstart) > ADC_STOP_CONVERSION_TIMEOUT)
      {
        /* Update ADC state machine to error */
        SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL);

        /* Set ADC error code to ADC IP internal error */
        SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL);

        return HAL_ERROR;
      }
    }

  }

  /* Return HAL status */
  return HAL_OK;
}

/**
  * @brief  Perform an ADC automatic self-calibration
  *         Calibration prerequisite: ADC must be disabled (execute this
  *         function before HAL_ADC_Start() or after HAL_ADC_Stop() ).
  * @note   Calibration factor can be read after calibration, using function
  *         HAL_ADC_GetValue() (value on 7 bits: from DR[6;0]).
  * @param  hadc ADC handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_Calibration_Start(ADC_HandleTypeDef* hadc)
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;
  uint32_t tickstart = 0U;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));

  /* Process locked */
  __HAL_LOCK(hadc);

  /* Calibration prerequisite: ADC must be disabled. */
  if (ADC_IS_ENABLE(hadc) == RESET)
  {
    /* Set ADC state */
    ADC_STATE_CLR_SET(hadc->State,
                      HAL_ADC_STATE_REG_BUSY,
                      HAL_ADC_STATE_BUSY_INTERNAL);

    /* Start ADC calibration */
    hadc->Instance->CR |= ADC_CR_ADCAL;

    tickstart = HAL_GetTick();

    /* Wait for calibration completion */
    while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADCAL))
    {
      if((HAL_GetTick() - tickstart) > ADC_CALIBRATION_TIMEOUT)
      {
        /* Update ADC state machine to error */
        ADC_STATE_CLR_SET(hadc->State,
                          HAL_ADC_STATE_BUSY_INTERNAL,
                          HAL_ADC_STATE_ERROR_INTERNAL);

        /* Process unlocked */
        __HAL_UNLOCK(hadc);

        return HAL_ERROR;
      }
    }
    /* Set ADC state */
    ADC_STATE_CLR_SET(hadc->State,
                      HAL_ADC_STATE_BUSY_INTERNAL,
                      HAL_ADC_STATE_RESET);
  }
  else
  {
    /* Update ADC state machine to error */
    SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

    tmp_hal_status = HAL_ERROR;
  }

  /* Process unlocked */
  __HAL_UNLOCK(hadc);

  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Perform an ADC automatic self-calibration
  *         Calibration prerequisite: ADC must be disabled (execute this
  *         function before HAL_ADC_Start() or after HAL_ADC_Stop() ).
  * @param  hadc: ADC handle
  * @param  CalibSamplingTime ADC Calibration Sample Time
  *          This parameter can be one of the following values:
  *            @arg ADC_CALIBSAMPLETIME_1CYCLE:   1 ADC CYCLE
  *            @arg ADC_CALIBSAMPLETIME_2CYCLES:  2 ADC CYCLES
  *            @arg ADC_CALIBSAMPLETIME_4CYCLES:  4 ADC CYCLES
  *            @arg ADC_CALIBSAMPLETIME_8CYCLES:  8 ADC CYCLES
  * @param  CalibSelection ADC Calibration Selection
  *          This parameter can be one of the following values:
  *            @arg ADC_CALIBSELECTION_ONLYOFFSET:  Only Calibrate the OFFSET
  *            @arg ADC_CALIBSELECTION_OFFSET_CAPACITANCE: Calibrate the OFFSET and CAPACITANCE
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_Calibration_SetAndStart(ADC_HandleTypeDef* hadc,uint32_t CalibSamplingTime,uint32_t CalibSelection) 
{
  HAL_StatusTypeDef tmp_hal_status = HAL_OK;
  uint32_t tickstart = 0U;
  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  assert_param(IS_ADC_CALIBRATION_SAMPLETIME(CalibSamplingTime));
  assert_param(IS_ADC_CALIBRATION_SELECTION(CalibSelection));

  /* Process locked */
  __HAL_LOCK(hadc);

  /* Calibration prerequisite: ADC must be disabled. */
  if (ADC_IS_ENABLE(hadc) == RESET)
  {
    /* Set ADC state */
    ADC_STATE_CLR_SET(hadc->State,
                      HAL_ADC_STATE_REG_BUSY,
                      HAL_ADC_STATE_BUSY_INTERNAL);
    
    hadc->Instance->CCSR &= ~( ADC_CCSR_CALSMP | ADC_CCSR_CALSEL  );
    hadc->Instance->CCSR |= ( CalibSamplingTime | CalibSelection );

    /* Start ADC calibration */
    hadc->Instance->CR |= ADC_CR_ADCAL;

    tickstart = HAL_GetTick();

    /* Wait for calibration completion */
    while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADCAL))
    {
      if((HAL_GetTick() - tickstart) > ADC_CALIBRATION_TIMEOUT)
      {
        /* Update ADC state machine to error */
        ADC_STATE_CLR_SET(hadc->State,
                          HAL_ADC_STATE_BUSY_INTERNAL,
                          HAL_ADC_STATE_ERROR_INTERNAL);

        /* Process unlocked */
        __HAL_UNLOCK(hadc);

        return HAL_ERROR;
      }
    }

    /* Set ADC state */
    ADC_STATE_CLR_SET(hadc->State,
                      HAL_ADC_STATE_BUSY_INTERNAL,
                      HAL_ADC_STATE_RESET);
  }
  else
  {
    /* Update ADC state machine to error */
    SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);

    tmp_hal_status = HAL_ERROR;
  }

  /* Process unlocked */
  __HAL_UNLOCK(hadc);

  /* Return function status */
  return tmp_hal_status;
}

/**
  * @brief  Get ADC Calibration Status.
  * @param  hadc ADC handle
  * @retval HAL ADC Calibration status
  */
HAL_ADCCalibStatusTypeDef HAL_ADC_Calibration_GetStatus(ADC_HandleTypeDef* hadc) 
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
  
  ADC_STATE_CLR_SET(hadc->State,
                      HAL_ADC_STATE_READY,
                      HAL_ADC_STATE_BUSY_INTERNAL);
  
  /* Check CALON Status */
  if(READ_BIT(hadc->Instance->CCSR, ADC_CCSR_CALON) == ADC_CCSR_CALON)
  {
    ADC_STATE_CLR_SET(hadc->State,
                          HAL_ADC_STATE_BUSY_INTERNAL,
                          HAL_ADC_STATE_ERROR_INTERNAL);       
        
    return HAL_ADCCALIBERROR;      
  }
 
  /* Check OFFSUC Status */
  if(READ_BIT(hadc->Instance->CCSR, ADC_CCSR_OFFSUC) != ADC_CCSR_OFFSUC)
  {    
    ADC_STATE_CLR_SET(hadc->State,
                          HAL_ADC_STATE_BUSY_INTERNAL,
                          HAL_ADC_STATE_ERROR_INTERNAL);    
        
    return HAL_ADCCALIBOFFFAIL;      
  }
  /* Check CAPSUC Status */
  if(READ_BIT(hadc->Instance->CCSR, ADC_CCSR_CALSEL) == ADC_CCSR_CALSEL)
  {
    if(READ_BIT(hadc->Instance->CCSR, ADC_CCSR_CAPSUC) != ADC_CCSR_CAPSUC)
    {
      ADC_STATE_CLR_SET(hadc->State,
                          HAL_ADC_STATE_BUSY_INTERNAL,
                          HAL_ADC_STATE_ERROR_INTERNAL);
               
      return HAL_ADCCALIBCAPFAIL;     
    }
  }
  
  ADC_STATE_CLR_SET(hadc->State,
                      HAL_ADC_STATE_BUSY_INTERNAL,
                      HAL_ADC_STATE_READY);

  /* Return function status */
  return HAL_ADCCALIBOK;         
}

/**
  * @}
  */

#endif /* HAL_ADC_MODULE_ENABLED */
/**
  * @}
  */

/**
  * @}
  */

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