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/**

  ******************************************************************************

  * @file    stm32f0xx_hal_adc.c

  * @author  MCD 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

  *          Other functions (extended functions) are available in file

  *          "stm32f0xx_hal_adc_ex.c".

  *

  @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).

                     ##### How to use this driver #####

  ==============================================================================

    [..]

     *** Configuration of top level parameters related to ADC ***

     ============================================================

     [..]

    (#) Enable the ADC interface

      (++) As prerequisite, ADC clock must be configured at RCC top level.

           Caution: On STM32F0, ADC clock frequency max is 14MHz (refer

                    to device datasheet).

                    Therefore, ADC clock prescaler must be configured in

                    function of ADC clock source frequency to remain below

                    this maximum frequency.

        (++) Two clock settings are mandatory:

             (+++) ADC clock (core clock, also possibly conversion clock).

             (+++) ADC clock (conversions clock).

                   Two possible clock sources: synchronous clock derived from APB clock

                   or asynchronous clock derived from ADC dedicated HSI RC oscillator

                   14MHz.

                   If asynchronous clock is selected, parameter "HSI14State" must be set either:

                   - to "...HSI14State = RCC_HSI14_ADC_CONTROL" to let the ADC control

                     the HSI14 oscillator enable/disable (if not used to supply the main

                     system clock): feature used if ADC mode LowPowerAutoPowerOff is

                     enabled.

                   - to "...HSI14State = RCC_HSI14_ON" to maintain the HSI14 oscillator

                     always enabled: can be used to supply the main system clock.

             (+++) Example:

                   Into HAL_ADC_MspInit() (recommended code location) or with

                   other device clock parameters configuration:

               (+++) __HAL_RCC_ADC1_CLK_ENABLE();                         (mandatory)

               HI14 enable or let under control of ADC:           (optional: if asynchronous clock selected)

               (+++) RCC_OscInitTypeDef   RCC_OscInitStructure;

               (+++) RCC_OscInitStructure.OscillatorType = RCC_OSCILLATORTYPE_HSI14;

               (+++) RCC_OscInitStructure.HSI14CalibrationValue = RCC_HSI14CALIBRATION_DEFAULT;

               (+++) RCC_OscInitStructure.HSI14State = RCC_HSI14_ADC_CONTROL;

               (+++) RCC_OscInitStructure.PLL...   (optional if used for system clock)

               (+++) HAL_RCC_OscConfig(&RCC_OscInitStructure);

        (++) ADC clock source and clock prescaler are configured at ADC level with

             parameter "ClockPrescaler" using function HAL_ADC_Init().

    (#) ADC pins configuration

         (++) Enable the clock for the ADC GPIOs

              using macro __HAL_RCC_GPIOx_CLK_ENABLE()

         (++) Configure these ADC pins in analog mode

              using function HAL_GPIO_Init()

    (#) Optionally, in case of usage of ADC with interruptions:

         (++) Configure the NVIC for ADC

              using function HAL_NVIC_EnableIRQ(ADCx_IRQn)

         (++) Insert the ADC interruption handler function HAL_ADC_IRQHandler()

              into the function of corresponding ADC interruption vector

              ADCx_IRQHandler().

    (#) Optionally, in case of usage of DMA:

         (++) Configure the DMA (DMA channel, mode normal or circular, ...)

              using function HAL_DMA_Init().

         (++) Configure the NVIC for DMA

              using function HAL_NVIC_EnableIRQ(DMAx_Channelx_IRQn)

         (++) Insert the ADC interruption handler function HAL_ADC_IRQHandler()

              into the function of corresponding DMA interruption vector

              DMAx_Channelx_IRQHandler().

     *** Configuration of ADC, group regular, channels parameters ***

     ================================================================

     [..]

    (#) Configure the ADC parameters (resolution, data alignment, ...)

        and regular group parameters (conversion trigger, sequencer, ...)

        using function HAL_ADC_Init().

    (#) Configure the channels for regular group parameters (channel number,

        channel rank into sequencer, ..., into regular group)

        using function HAL_ADC_ConfigChannel().

    (#) Optionally, configure the analog watchdog parameters (channels

        monitored, thresholds, ...)

        using function HAL_ADC_AnalogWDGConfig().

     *** Execution of ADC conversions ***

     ====================================

     [..]

    (#) Optionally, perform an automatic ADC calibration to improve the

        conversion accuracy

        using function HAL_ADCEx_Calibration_Start().

    (#) ADC driver can be used among three modes: polling, interruption,

        transfer by DMA.

        (++) ADC conversion by polling:

          (+++) Activate the ADC peripheral and start conversions

                using function HAL_ADC_Start()

          (+++) Wait for ADC conversion completion

                using function HAL_ADC_PollForConversion()

          (+++) Retrieve conversion results

                using function HAL_ADC_GetValue()

          (+++) Stop conversion and disable the ADC peripheral

                using function HAL_ADC_Stop()

        (++) ADC conversion by interruption:

          (+++) Activate the ADC peripheral and start conversions

                using function HAL_ADC_Start_IT()

          (+++) Wait for ADC conversion completion by call of function

                HAL_ADC_ConvCpltCallback()

                (this function must be implemented in user program)

          (+++) Retrieve conversion results

                using function HAL_ADC_GetValue()

          (+++) Stop conversion and disable the ADC peripheral

                using function HAL_ADC_Stop_IT()

        (++) ADC conversion with transfer by DMA:

          (+++) Activate the ADC peripheral and start conversions

                using function HAL_ADC_Start_DMA()

          (+++) Wait for ADC conversion completion by call of function

                HAL_ADC_ConvCpltCallback() or HAL_ADC_ConvHalfCpltCallback()

                (these functions must be implemented in user program)

          (+++) Conversion results are automatically transferred by DMA into

                destination variable address.

          (+++) Stop conversion and disable the ADC peripheral

                using function HAL_ADC_Stop_DMA()

     [..]

    (@) Callback functions must be implemented in user program:

      (+@) HAL_ADC_ErrorCallback()

      (+@) HAL_ADC_LevelOutOfWindowCallback() (callback of analog watchdog)

      (+@) HAL_ADC_ConvCpltCallback()

      (+@) HAL_ADC_ConvHalfCpltCallback

     *** Deinitialization of ADC ***

     ============================================================

     [..]

    (#) Disable the ADC interface

      (++) ADC clock can be hard reset and disabled at RCC top level.

        (++) Hard reset of ADC peripherals

             using macro __ADCx_FORCE_RESET(), __ADCx_RELEASE_RESET().

        (++) ADC clock disable

             using the equivalent macro/functions as configuration step.

             (+++) Example:

                   Into HAL_ADC_MspDeInit() (recommended code location) or with

                   other device clock parameters configuration:

               (+++) RCC_OscInitStructure.OscillatorType = RCC_OSCILLATORTYPE_HSI14;

               (+++) RCC_OscInitStructure.HSI14State = RCC_HSI14_OFF; (if not used for system clock)

               (+++) HAL_RCC_OscConfig(&RCC_OscInitStructure);

    (#) ADC pins configuration

         (++) Disable the clock for the ADC GPIOs

              using macro __HAL_RCC_GPIOx_CLK_DISABLE()

    (#) Optionally, in case of usage of ADC with interruptions:

         (++) Disable the NVIC for ADC

              using function HAL_NVIC_DisableIRQ(ADCx_IRQn)

    (#) Optionally, in case of usage of DMA:

         (++) Deinitialize the DMA

              using function HAL_DMA_DeInit().

         (++) Disable the NVIC for DMA

              using function HAL_NVIC_DisableIRQ(DMAx_Channelx_IRQn)

    [..]

    *** Callback registration ***

    =============================================

    [..]

     The compilation flag USE_HAL_ADC_REGISTER_CALLBACKS, when set to 1,

     allows the user to configure dynamically the driver callbacks.

     Use Functions @ref HAL_ADC_RegisterCallback()

     to register an interrupt callback.

    [..]

     Function @ref HAL_ADC_RegisterCallback() allows to register following callbacks:

       (+) ConvCpltCallback               : ADC conversion complete callback

       (+) ConvHalfCpltCallback           : ADC conversion DMA half-transfer callback

       (+) LevelOutOfWindowCallback       : ADC analog watchdog 1 callback

       (+) ErrorCallback                  : ADC error callback

       (+) MspInitCallback                : ADC Msp Init callback

       (+) MspDeInitCallback              : ADC Msp DeInit callback

     This function takes as parameters the HAL peripheral handle, the Callback ID

     and a pointer to the user callback function.

    [..]

     Use function @ref HAL_ADC_UnRegisterCallback to reset a callback to the default

     weak function.

    [..]

     @ref HAL_ADC_UnRegisterCallback takes as parameters the HAL peripheral handle,

     and the Callback ID.

     This function allows to reset following callbacks:

       (+) ConvCpltCallback               : ADC conversion complete callback

       (+) ConvHalfCpltCallback           : ADC conversion DMA half-transfer callback

       (+) LevelOutOfWindowCallback       : ADC analog watchdog 1 callback

       (+) ErrorCallback                  : ADC error callback

       (+) MspInitCallback                : ADC Msp Init callback

       (+) MspDeInitCallback              : ADC Msp DeInit callback

     [..]

     By default, after the @ref HAL_ADC_Init() and when the state is @ref HAL_ADC_STATE_RESET

     all callbacks are set to the corresponding weak functions:

     examples @ref HAL_ADC_ConvCpltCallback(), @ref HAL_ADC_ErrorCallback().

     Exception done for MspInit and MspDeInit functions that are

     reset to the legacy weak functions in the @ref HAL_ADC_Init()/ @ref HAL_ADC_DeInit() only when

     these callbacks are null (not registered beforehand).

    [..]

     If MspInit or MspDeInit are not null, the @ref HAL_ADC_Init()/ @ref HAL_ADC_DeInit()

     keep and use the user MspInit/MspDeInit callbacks (registered beforehand) whatever the state.

     [..]

     Callbacks can be registered/unregistered in @ref HAL_ADC_STATE_READY state only.

     Exception done MspInit/MspDeInit functions that can be registered/unregistered

     in @ref HAL_ADC_STATE_READY or @ref HAL_ADC_STATE_RESET state,

     thus registered (user) MspInit/DeInit callbacks can be used during the Init/DeInit.

    [..]

     Then, the user first registers the MspInit/MspDeInit user callbacks

     using @ref HAL_ADC_RegisterCallback() before calling @ref HAL_ADC_DeInit()

     or @ref HAL_ADC_Init() function.

     [..]

     When the compilation flag USE_HAL_ADC_REGISTER_CALLBACKS is set to 0 or

     not defined, the callback registration feature is not available and all callbacks

     are set to the corresponding weak functions.

    @endverbatim

  ******************************************************************************

  * @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 "stm32f0xx_hal.h"

/** @addtogroup STM32F0xx_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)

/**

    * @}

    */

/* 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);

static void ADC_DMAConvCplt(DMA_HandleTypeDef *hdma);

static void ADC_DMAHalfConvCplt(DMA_HandleTypeDef *hdma);

static void ADC_DMAError(DMA_HandleTypeDef *hdma);

/**

    * @}

    */

/* 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 of 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_FUNCTIONAL_STATE(hadc->Init.DMAContinuousRequests));

  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));

  assert_param(IS_FUNCTIONAL_STATE(hadc->Init.LowPowerAutoPowerOff));

  /* 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: Vbat, temperature sensor, Vref       */

      /*     (set into HAL_ADC_ConfigChannel() )                              */

      /* Configuration of ADC resolution                                      */

      MODIFY_REG(hadc->Instance->CFGR1,

                 ADC_CFGR1_RES        ,

                 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                                               */

    /*  - LowPowerAutoPowerOff 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_AUTOFF  |

                                ADC_CFGR1_AUTDLY  |

                                ADC_CFGR1_CONT    |

                                ADC_CFGR1_OVRMOD  |

                                ADC_CFGR1_EXTSEL  |

                                ADC_CFGR1_EXTEN   |

                                ADC_CFGR1_ALIGN   |

                                ADC_CFGR1_SCANDIR |

                                ADC_CFGR1_DMACFG   );

    tmpCFGR1 |= (ADC_CFGR1_AUTOWAIT((uint32_t)hadc->Init.LowPowerAutoWait)        |

                 ADC_CFGR1_AUTOOFF((uint32_t)hadc->Init.LowPowerAutoPowerOff)     |

                 ADC_CFGR1_CONTINUOUS((uint32_t)hadc->Init.ContinuousConvMode)    |

                 ADC_CFGR1_OVERRUN(hadc->Init.Overrun)                            |

                 hadc->Init.DataAlign                                             |

                 ADC_SCANDIR(hadc->Init.ScanConvMode)                             |

                 ADC_CFGR1_DMACONTREQ((uint32_t)hadc->Init.DMAContinuousRequests)  );

    /* 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_RES))

         == 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 | ADC_IT_RDY   ) );

    /* Reset register ISR */

    __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_AWD   | ADC_FLAG_OVR  |

                                ADC_FLAG_EOS   | ADC_FLAG_EOC  |

                                ADC_FLAG_EOSMP | ADC_FLAG_RDY   ) );

    /* Reset register CR */

    /* Bits ADC_CR_ADCAL, ADC_CR_ADSTP, ADC_CR_ADSTART are in access mode     */

    /* "read-set": no direct reset applicable.                                */

    /* 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_RES    |

                               ADC_CFGR1_SCANDIR | ADC_CFGR1_DMACFG | ADC_CFGR1_DMAEN                      );

    /* 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 TR1 */

    hadc->Instance->TR &= ~(ADC_TR_HT | ADC_TR_LT);

    /* Reset register CHSELR */

    hadc->Instance->CHSELR &= ~(ADC_CHSELR_CHSEL18 | ADC_CHSELR_CHSEL17 | ADC_CHSELR_CHSEL16 |

                                ADC_CHSELR_CHSEL15 | ADC_CHSELR_CHSEL14 | ADC_CHSELR_CHSEL13 | ADC_CHSELR_CHSEL12 |

                                ADC_CHSELR_CHSEL11 | 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   );

    /* 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;