text: /**
    ******************************************************************************
    * @file    stm32l4xx_hal_dac_ex.c
    * @author  MCD Application Team
    * @brief   DAC HAL module driver.
    *          This file provides firmware functions to manage the extended 
    *          functionalities of the DAC peripheral.  
    *     
    *
    @verbatim      
    ==============================================================================
                        ##### How to use this driver #####
    ==============================================================================
      [..]          
        (+) When Dual mode is enabled (i.e. DAC Channel1 and Channel2 are used simultaneously) :
            Use HAL_DACEx_DualGetValue() to get digital data to be converted and use
            HAL_DACEx_DualSetValue() to set digital value to converted simultaneously in Channel 1 and Channel 2.  
        (+) Use HAL_DACEx_TriangleWaveGenerate() to generate Triangle signal.
        (+) Use HAL_DACEx_NoiseWaveGenerate() to generate Noise signal.
  
        (+) HAL_DACEx_SelfCalibrate to calibrate one DAC channel.
        (+) HAL_DACEx_SetUserTrimming to set user trimming value.
        (+) HAL_DACEx_GetTrimOffset to retrieve trimming value (factory setting 
            after reset, user setting if HAL_DACEx_SetUserTrimming have been used 
            at least one time after reset).
  
   @endverbatim    
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
    *
    * Redistribution and use in source and binary forms, with or without modification,
    * are permitted provided that the following conditions are met:
    *   1. Redistributions of source code must retain the above copyright notice,
    *      this list of conditions and the following disclaimer.
    *   2. Redistributions in binary form must reproduce the above copyright notice,
    *      this list of conditions and the following disclaimer in the documentation
    *      and/or other materials provided with the distribution.
    *   3. Neither the name of STMicroelectronics nor the names of its contributors
    *      may be used to endorse or promote products derived from this software
    *      without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
    * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    ******************************************************************************
    */ 
  
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32l4xx_hal.h"
  
  /** @addtogroup STM32L4xx_HAL_Driver
    * @{
    */
  
  #ifdef HAL_DAC_MODULE_ENABLED
  
  #if defined(DAC1)
  
  /** @defgroup DACEx DACEx
    * @brief DAC Extended HAL module driver
    * @{
    */
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private function prototypes -----------------------------------------------*/
  /* Exported functions --------------------------------------------------------*/
    
  /** @defgroup DACEx_Exported_Functions DACEx Exported Functions
    * @{
    */
  
  /** @defgroup DACEx_Exported_Functions_Group2 IO operation functions
   *  @brief    Extended IO operation functions 
   *
  @verbatim   
    ==============================================================================
                   ##### Extended features functions #####
    ==============================================================================  
      [..]  This section provides functions allowing to:
        (+) Start conversion.
        (+) Stop conversion.
        (+) Start conversion and enable DMA transfer.
        (+) Stop conversion and disable DMA transfer.
        (+) Get result of conversion.
        (+) Get result of dual mode conversion.
                       
  @endverbatim
    * @{
    */
  
  /**
    * @brief  Enable or disable the selected DAC channel wave generation.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @param  Channel: The selected DAC channel. 
    *          This parameter can be one of the following values:
    *            DAC_CHANNEL_1 / DAC_CHANNEL_2
    * @param  Amplitude: Select max triangle amplitude. 
    *          This parameter can be one of the following values:
    *            @arg DAC_TRIANGLEAMPLITUDE_1: Select max triangle amplitude of 1
    *            @arg DAC_TRIANGLEAMPLITUDE_3: Select max triangle amplitude of 3
    *            @arg DAC_TRIANGLEAMPLITUDE_7: Select max triangle amplitude of 7
    *            @arg DAC_TRIANGLEAMPLITUDE_15: Select max triangle amplitude of 15
    *            @arg DAC_TRIANGLEAMPLITUDE_31: Select max triangle amplitude of 31
    *            @arg DAC_TRIANGLEAMPLITUDE_63: Select max triangle amplitude of 63
    *            @arg DAC_TRIANGLEAMPLITUDE_127: Select max triangle amplitude of 127
    *            @arg DAC_TRIANGLEAMPLITUDE_255: Select max triangle amplitude of 255
    *            @arg DAC_TRIANGLEAMPLITUDE_511: Select max triangle amplitude of 511
    *            @arg DAC_TRIANGLEAMPLITUDE_1023: Select max triangle amplitude of 1023
    *            @arg DAC_TRIANGLEAMPLITUDE_2047: Select max triangle amplitude of 2047
    *            @arg DAC_TRIANGLEAMPLITUDE_4095: Select max triangle amplitude of 4095                               
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DACEx_TriangleWaveGenerate(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t Amplitude)
  {  
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    assert_param(IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(Amplitude));
    
    /* Process locked */
    __HAL_LOCK(hdac);
    
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_BUSY;
    
    /* Enable the triangle wave generation for the selected DAC channel */
    MODIFY_REG(hdac->Instance->CR, ((DAC_CR_WAVE1)|(DAC_CR_MAMP1))<<Channel, (DAC_CR_WAVE1_1 | Amplitude) << Channel);
    
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_READY;
    
    /* Process unlocked */
    __HAL_UNLOCK(hdac);
    
    /* Return function status */
    return HAL_OK;
  }
  
  /**
    * @brief  Enable or disable the selected DAC channel wave generation.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC. 
    * @param  Channel: The selected DAC channel. 
    *          This parameter can be one of the following values:
    *            DAC_CHANNEL_1 / DAC_CHANNEL_2
    * @param  Amplitude: Unmask DAC channel LFSR for noise wave generation. 
    *          This parameter can be one of the following values: 
    *            @arg DAC_LFSRUNMASK_BIT0: Unmask DAC channel LFSR bit0 for noise wave generation
    *            @arg DAC_LFSRUNMASK_BITS1_0: Unmask DAC channel LFSR bit[1:0] for noise wave generation  
    *            @arg DAC_LFSRUNMASK_BITS2_0: Unmask DAC channel LFSR bit[2:0] for noise wave generation
    *            @arg DAC_LFSRUNMASK_BITS3_0: Unmask DAC channel LFSR bit[3:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS4_0: Unmask DAC channel LFSR bit[4:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS5_0: Unmask DAC channel LFSR bit[5:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS6_0: Unmask DAC channel LFSR bit[6:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS7_0: Unmask DAC channel LFSR bit[7:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS8_0: Unmask DAC channel LFSR bit[8:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS9_0: Unmask DAC channel LFSR bit[9:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS10_0: Unmask DAC channel LFSR bit[10:0] for noise wave generation 
    *            @arg DAC_LFSRUNMASK_BITS11_0: Unmask DAC channel LFSR bit[11:0] for noise wave generation 
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DACEx_NoiseWaveGenerate(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t Amplitude)
  {   
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    assert_param(IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(Amplitude));
    
    /* Process locked */
    __HAL_LOCK(hdac);
    
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_BUSY;
       
    /* Enable the noise wave generation for the selected DAC channel */
    MODIFY_REG(hdac->Instance->CR, ((DAC_CR_WAVE1)|(DAC_CR_MAMP1))<<Channel, (DAC_CR_WAVE1_0 | Amplitude) << Channel);
    
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_READY;
    
    /* Process unlocked */
    __HAL_UNLOCK(hdac);
    
    /* Return function status */
    return HAL_OK;
  }
  
  #if defined (STM32L431xx) || defined (STM32L432xx) || defined (STM32L433xx) || defined (STM32L442xx) || defined (STM32L443xx) || \
      defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || defined (STM32L496xx) || defined (STM32L4A6xx) || \
      defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined(STM32L4S9xx)
  
  /**
    * @brief  Set the specified data holding register value for dual DAC channel.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *               the configuration information for the specified DAC.
    * @param  Alignment: Specifies the data alignment for dual channel DAC.
    *          This parameter can be one of the following values:
    *            DAC_ALIGN_8B_R: 8bit right data alignment selected
    *            DAC_ALIGN_12B_L: 12bit left data alignment selected
    *            DAC_ALIGN_12B_R: 12bit right data alignment selected
    * @param  Data1: Data for DAC Channel2 to be loaded in the selected data holding register.
    * @param  Data2: Data for DAC Channel1 to be loaded in the selected data  holding register.
    * @note   In dual mode, a unique register access is required to write in both
    *          DAC channels at the same time.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DACEx_DualSetValue(DAC_HandleTypeDef* hdac, uint32_t Alignment, uint32_t Data1, uint32_t Data2)
  {  
    uint32_t data = 0, tmp = 0;
    
    /* Check the parameters */
    assert_param(IS_DAC_ALIGN(Alignment));
    assert_param(IS_DAC_DATA(Data1));
    assert_param(IS_DAC_DATA(Data2));
    
    /* Calculate and set dual DAC data holding register value */
    if (Alignment == DAC_ALIGN_8B_R)
    {
      data = ((uint32_t)Data2 << 8) | Data1; 
    }
    else
    {
      data = ((uint32_t)Data2 << 16) | Data1;
    }
    
    tmp = (uint32_t)hdac->Instance;
    tmp += DAC_DHR12RD_ALIGNMENT(Alignment);
  
    /* Set the dual DAC selected data holding register */
    *(__IO uint32_t *)tmp = data;
    
    /* Return function status */
    return HAL_OK;
  }
  
  /**
    * @brief  Conversion complete callback in non-blocking mode for Channel2.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @retval None
    */
  __weak void HAL_DACEx_ConvCpltCallbackCh2(DAC_HandleTypeDef* hdac)
  {
    /* Prevent unused argument(s) compilation warning */
    UNUSED(hdac);
  
    /* NOTE : This function should not be modified, when the callback is needed,
              the HAL_DACEx_ConvCpltCallbackCh2 could be implemented in the user file
     */
  }
  
  /**
    * @brief  Conversion half DMA transfer callback in non-blocking mode for Channel2. 
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @retval None
    */
  __weak void HAL_DACEx_ConvHalfCpltCallbackCh2(DAC_HandleTypeDef* hdac)
  {
    /* Prevent unused argument(s) compilation warning */
    UNUSED(hdac);
  
    /* NOTE : This function should not be modified, when the callback is needed,
              the HAL_DACEx_ConvHalfCpltCallbackCh2 could be implemented in the user file
     */
  }
  
  /**
    * @brief  Error DAC callback for Channel2.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @retval None
    */
  __weak void HAL_DACEx_ErrorCallbackCh2(DAC_HandleTypeDef *hdac)
  {
    /* Prevent unused argument(s) compilation warning */
    UNUSED(hdac);
  
    /* NOTE : This function should not be modified, when the callback is needed,
              the HAL_DACEx_ErrorCallbackCh2 could be implemented in the user file
     */
  }
  
  /**
    * @brief  DMA underrun DAC callback for Channel2.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @retval None
    */
  __weak void HAL_DACEx_DMAUnderrunCallbackCh2(DAC_HandleTypeDef *hdac)
  {
    /* Prevent unused argument(s) compilation warning */
    UNUSED(hdac);
  
    /* NOTE : This function should not be modified, when the callback is needed,
              the HAL_DACEx_DMAUnderrunCallbackCh2 could be implemented in the user file
     */
  }
  #endif  /* STM32L431xx STM32L432xx STM32L433xx STM32L442xx STM32L443xx                         */
          /* STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx STM32L496xx STM32L4A6xx */
          /* STM32L4R5xx STM32L4R7xx STM32L4R9xx STM32L4S5xx STM32L4S7xx STM32L4S9xx             */
  
  /**
    * @brief  Run the self calibration of one DAC channel.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @param  sConfig: DAC channel configuration structure.
    * @param  Channel: The selected DAC channel. 
    *          This parameter can be one of the following values:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected
    * @retval Updates DAC_TrimmingValue. , DAC_UserTrimming set to DAC_UserTrimming
    * @retval HAL status
    * @note   Calibration runs about 7 ms.
    */
  
  HAL_StatusTypeDef HAL_DACEx_SelfCalibrate (DAC_HandleTypeDef* hdac, DAC_ChannelConfTypeDef* sConfig, uint32_t Channel)
  { 
    HAL_StatusTypeDef status = HAL_OK;
     
    __IO uint32_t tmp = 0;
    uint32_t trimmingvalue = 0;
    uint32_t delta;
    
    /* store/restore channel configuration structure purpose */
    uint32_t oldmodeconfiguration = 0;
    
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
      
   /* Check the DAC handle allocation */
   /* Check if DAC running */
    if((hdac == NULL) || (hdac->State == HAL_DAC_STATE_BUSY))
    {
      status = HAL_ERROR;
    }
    else
    {
      /* Process locked */
      __HAL_LOCK(hdac);
      
      /* Store configuration */
      oldmodeconfiguration = (hdac->Instance->MCR & (DAC_MCR_MODE1 << Channel));
      
      /* Disable the selected DAC channel */
      CLEAR_BIT ((hdac->Instance->CR), (DAC_CR_EN1 << Channel));
      
      /* Set mode in MCR  for calibration */
      MODIFY_REG(hdac->Instance->MCR, (DAC_MCR_MODE1 << Channel), 0);
      
      /* Set DAC Channel1 DHR register to the middle value */
      tmp = (uint32_t)hdac->Instance; 
      
  #if defined (STM32L431xx) || defined (STM32L432xx) || defined (STM32L433xx) || defined (STM32L442xx) || defined (STM32L443xx) || \
      defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || defined (STM32L496xx) || defined (STM32L4A6xx) || \
      defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined(STM32L4S9xx)
      if(Channel == DAC_CHANNEL_1)
      {
        tmp += DAC_DHR12R1_ALIGNMENT(DAC_ALIGN_12B_R);
      }
      else
      {
        tmp += DAC_DHR12R2_ALIGNMENT(DAC_ALIGN_12B_R);
      }
  #endif  /* STM32L431xx STM32L432xx STM32L433xx STM32L442xx STM32L443xx                         */
          /* STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx STM32L496xx STM32L4A6xx */
          /* STM32L4R5xx STM32L4R7xx STM32L4R9xx STM32L4S5xx STM32L4S7xx STM32L4S9xx             */
  #if defined (STM32L451xx) || defined (STM32L452xx) || defined (STM32L462xx) 
      tmp += DAC_DHR12R1_ALIGNMENT(DAC_ALIGN_12B_R);
  #endif /* STM32L451xx STM32L452xx STM32L462xx */
      *(__IO uint32_t *) tmp = 0x0800;
      
      /* Enable the selected DAC channel calibration */
      /* i.e. set DAC_CR_CENx bit */
      SET_BIT ((hdac->Instance->CR), (DAC_CR_CEN1 << Channel));
      
      /* Init trimming counter */    
      /* Medium value */
      trimmingvalue = 16; 
      delta = 8;
      while (delta != 0) 
      {
        /* Set candidate trimming */
        MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1<<Channel), (trimmingvalue<<Channel));
        
        /* tOFFTRIMmax delay x ms as per datasheet (electrical characteristics */ 
        /* i.e. minimum time needed between two calibration steps */
        HAL_Delay(1);
        
        if ((hdac->Instance->SR & (DAC_SR_CAL_FLAG1<<Channel)) == (DAC_SR_CAL_FLAG1<<Channel))
        { 
          /* DAC_SR_CAL_FLAGx is HIGH try higher trimming */
          trimmingvalue -= delta;
        }
        else
        {
          /* DAC_SR_CAL_FLAGx is LOW try lower trimming */
          trimmingvalue += delta;
        }                   
        delta >>= 1;
      }
      
      /* Still need to check if right calibration is current value or one step below */
      /* Indeed the first value that causes the DAC_SR_CAL_FLAGx bit to change from 0 to 1  */
      /* Set candidate trimming */
      MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1<<Channel), (trimmingvalue<<Channel));
      
      /* tOFFTRIMmax delay x ms as per datasheet (electrical characteristics */ 
      /* i.e. minimum time needed between two calibration steps */
      HAL_Delay(1);
      
      if ((hdac->Instance->SR & (DAC_SR_CAL_FLAG1<<Channel)) == RESET)
      { 
        /* OPAMP_CSR_OUTCAL is actually one value more */
        trimmingvalue++;
        /* Set right trimming */
        MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1<<Channel), (trimmingvalue<<Channel));
      }
      
      /* Disable the selected DAC channel calibration */
      /* i.e. clear DAC_CR_CENx bit */
      CLEAR_BIT ((hdac->Instance->CR), (DAC_CR_CEN1 << Channel));
      
      sConfig->DAC_TrimmingValue = trimmingvalue;
      sConfig->DAC_UserTrimming = DAC_TRIMMING_USER;
      
      /* Restore configuration */
      MODIFY_REG(hdac->Instance->MCR, (DAC_MCR_MODE1 << Channel), oldmodeconfiguration);
      
      /* Process unlocked */
      __HAL_UNLOCK(hdac);
    }
    
    return status;
  }
  
  /**
    * @brief  Set the trimming mode and trimming value (user trimming mode applied).
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @param  sConfig: DAC configuration structure updated with new DAC trimming value.
    * @param  Channel: The selected DAC channel. 
    *          This parameter can be one of the following values:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected
    * @param  NewTrimmingValue: DAC new trimming value
    * @retval HAL status
    */
  
  HAL_StatusTypeDef HAL_DACEx_SetUserTrimming (DAC_HandleTypeDef* hdac, DAC_ChannelConfTypeDef* sConfig, uint32_t Channel, uint32_t NewTrimmingValue)
  { 
    HAL_StatusTypeDef status = HAL_OK;
       
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    assert_param(IS_DAC_NEWTRIMMINGVALUE(NewTrimmingValue));
    
   /* Check the DAC handle allocation */
    if(hdac == NULL)
    {
      status = HAL_ERROR;
    }
    else
    {
      /* Process locked */
      __HAL_LOCK(hdac);
      
      /* Set new trimming */
      MODIFY_REG(hdac->Instance->CCR, (DAC_CCR_OTRIM1<<Channel), (NewTrimmingValue<<Channel));
      
      /* Update trimming mode */
      sConfig->DAC_UserTrimming = DAC_TRIMMING_USER;
      sConfig->DAC_TrimmingValue = NewTrimmingValue;
      
      /* Process unlocked */
      __HAL_UNLOCK(hdac);
    }
    return status;
  }
  
  /**
    * @brief  Return the DAC trimming value.
    * @param  hdac : DAC handle
    * @param  Channel: The selected DAC channel. 
    *          This parameter can be one of the following values:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected
    * @retval Trimming value : range: 0->31
    *         
   */
  
  uint32_t HAL_DACEx_GetTrimOffset (DAC_HandleTypeDef *hdac, uint32_t Channel)
  {
    uint32_t trimmingvalue = 0;
    
    /* Check the DAC handle allocation */
    /* And not in Reset state */
    if((hdac == NULL) || (hdac->State == HAL_DAC_STATE_RESET))
    {
      return HAL_ERROR;
    }
    else
    {
      /* Check the parameter */
      assert_param(IS_DAC_CHANNEL(Channel));
  
      /* Retrieve trimming  */
      trimmingvalue = ((hdac->Instance->CCR & (DAC_CCR_OTRIM1 << Channel)) >> Channel);
    }  
    return trimmingvalue;
  }
  
  /**
    * @}
    */
  
  #if defined (STM32L431xx) || defined (STM32L432xx) || defined (STM32L433xx) || defined (STM32L442xx) || defined (STM32L443xx) || \
      defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || defined (STM32L496xx) || defined (STM32L4A6xx) || \
      defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined(STM32L4S9xx)   
  
  /** @defgroup DACEx_Exported_Functions_Group3 Peripheral Control functions
   *  @brief    Extended Peripheral Control functions 
   *
  @verbatim   
    ==============================================================================
               ##### Peripheral Control functions #####
    ==============================================================================  
      [..]  This section provides functions allowing to:
        (+) Configure channels. 
        (+) Set the specified data holding register value for DAC channel.
        
  @endverbatim
    * @{
    */
  
  /**
    * @brief  Return the last data output value of the selected DAC channel.
    * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @retval The selected DAC channel data output value.
    */
  uint32_t HAL_DACEx_DualGetValue(DAC_HandleTypeDef* hdac)
  {
    uint32_t tmp = 0;
    
    tmp |= hdac->Instance->DOR1;
  
    tmp |= hdac->Instance->DOR2 << 16;
    
    /* Returns the DAC channel data output register value */
    return tmp;
  }
  
  /**
    * @}
    */
  
  #endif  /* STM32L431xx STM32L432xx STM32L433xx STM32L442xx STM32L443xx                         */    
          /* STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx STM32L496xx STM32L4A6xx */
          /* STM32L4R5xx STM32L4R7xx STM32L4R9xx STM32L4S5xx STM32L4S7xx STM32L4S9xx                                     */
  
  /**
    * @}
    */
  
  #if defined (STM32L431xx) || defined (STM32L432xx) || defined (STM32L433xx) || defined (STM32L442xx) || defined (STM32L443xx) || \
      defined (STM32L471xx) || defined (STM32L475xx) || defined (STM32L476xx) || defined (STM32L485xx) || defined (STM32L486xx) || defined (STM32L496xx) || defined (STM32L4A6xx) || \
      defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined(STM32L4S9xx)   
  
  /* Private functions ---------------------------------------------------------*/
  /** @defgroup DACEx_Private_Functions DACEx private functions
   *  @brief    Extended private functions
     * @{
    */
  
  /**
    * @brief  DMA conversion complete callback. 
    * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
    *                the configuration information for the specified DMA module.
    * @retval None
    */
  void DAC_DMAConvCpltCh2(DMA_HandleTypeDef *hdma)   
  {
    DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
    
    HAL_DACEx_ConvCpltCallbackCh2(hdac); 
    
    hdac->State= HAL_DAC_STATE_READY;
  }
  
  /**
    * @brief  DMA half transfer complete callback. 
    * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
    *                the configuration information for the specified DMA module.
    * @retval None
    */
  void DAC_DMAHalfConvCpltCh2(DMA_HandleTypeDef *hdma)   
  {
      DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
      /* Conversion complete callback */
      HAL_DACEx_ConvHalfCpltCallbackCh2(hdac); 
  }
  
  /**
    * @brief  DMA error callback.
    * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
    *                the configuration information for the specified DMA module.
    * @retval None
    */
  void DAC_DMAErrorCh2(DMA_HandleTypeDef *hdma)   
  {
    DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
      
    /* Set DAC error code to DMA error */
    hdac->ErrorCode |= HAL_DAC_ERROR_DMA;
      
    HAL_DACEx_ErrorCallbackCh2(hdac); 
      
    hdac->State= HAL_DAC_STATE_READY;
  }
  
  /**
    * @}
    */
  #endif  /* STM32L431xx STM32L432xx STM32L433xx STM32L442xx STM32L443xx                         */
          /* STM32L471xx STM32L475xx STM32L476xx STM32L485xx STM32L486xx STM32L496xx STM32L4A6xx */
          /* STM32L4R5xx STM32L4R7xx STM32L4R9xx STM32L4S5xx STM32L4S7xx STM32L4S9xx             */
  
  /**
    * @}
    */
  
  #endif /* DAC1 */
  
  #endif /* HAL_DAC_MODULE_ENABLED */
  
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  