text: /**
    ******************************************************************************
    * @file    stm32l0xx_hal_dac_ex.c
    * @author  MCD Application Team
    * @brief   Extended DAC HAL module driver.
    *          This file provides firmware functions to manage the following
    *          functionalities of DAC extension peripheral:
    *           + Extended features functions
    *     
    *     
    @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.
    
   @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
    *
    ******************************************************************************
    */
  
  
  #if !defined (STM32L010xB) && !defined (STM32L010x8) && !defined (STM32L010x6) && !defined (STM32L010x4) && !defined (STM32L011xx) && !defined (STM32L021xx) && !defined (STM32L031xx) && !defined (STM32L041xx) && !defined (STM32L051xx) && !defined (STM32L061xx) && !defined (STM32L071xx) && !defined (STM32L081xx)
  /* Includes ------------------------------------------------------------------*/
  #include "stm32l0xx_hal.h"
  
  #ifdef HAL_DAC_MODULE_ENABLED
  /** @addtogroup STM32L0xx_HAL_Driver
    * @{
    */
  
  /** @addtogroup DACEx DACEx
    * @brief DAC driver modules
    * @{
    */
  
  /** @addtogroup DACEx_Private
    * @{
    */
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private function prototypes -----------------------------------------------*/
  /* Private functions ---------------------------------------------------------*/
  
  #if defined (STM32L072xx) || defined (STM32L073xx) || defined (STM32L082xx) || defined (STM32L083xx)
  static void DAC_DMAConvCpltCh2(DMA_HandleTypeDef *hdma);
  static void DAC_DMAErrorCh2(DMA_HandleTypeDef *hdma);
  static void DAC_DMAHalfConvCpltCh2(DMA_HandleTypeDef *hdma); 
  #endif
  static void DAC_DMAConvCpltCh1(DMA_HandleTypeDef *hdma);
  static void DAC_DMAErrorCh1(DMA_HandleTypeDef *hdma);
  static void DAC_DMAHalfConvCpltCh1(DMA_HandleTypeDef *hdma);
  /**
    * @}
    */
  
  /** @addtogroup DACEx_Exported_Functions
    * @{
    */
  
  /** @addtogroup DACEx_Exported_Functions_Group1
   *  @brief    Extended features functions 
   *
  
    * @{
    */
  
  #if defined (STM32L072xx) || defined (STM32L073xx) || defined (STM32L082xx) || defined (STM32L083xx)
  /**
    * @brief  Returns 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 = 0U;
    
    tmp |= hdac->Instance->DOR1;
    
    tmp |= hdac->Instance->DOR2 << 16U;
    
    /* Returns the DAC channel data output register value */
    return tmp;
  }
  #endif
  
  /**
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected (STM32L07x/STM32L08x only)
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected (STM32L07x/STM32L08x only)
    * @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 (STM32L072xx) || defined (STM32L073xx) || defined (STM32L082xx) || defined (STM32L083xx)
  /**
    * @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 Channel1 to be loaded in the selected data holding register.
    * @param  Data2 Data for DAC Channel2 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 = 0U, tmp = 0U;
    
    /* 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 << 8U) | Data1; 
    }
    else
    {
      data = ((uint32_t)Data2 << 16U) | 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_DAC_DMAUnderrunCallbackCh2 could be implemented in the user file
     */
  }
  
  /**
    * @brief  Enables DAC and starts conversion of channel.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_Start(DAC_HandleTypeDef* hdac, uint32_t Channel)
  {
    uint32_t tmp1 = 0U, tmp2 = 0U;
    
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
  
    /* Process locked */
    __HAL_LOCK(hdac);
  
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_BUSY;
  
    /* Enable the Peripharal */
    __HAL_DAC_ENABLE(hdac, Channel);
  
    if(Channel == DAC_CHANNEL_1)
    {
      tmp1 = hdac->Instance->CR & DAC_CR_TEN1;
      tmp2 = hdac->Instance->CR & DAC_CR_TSEL1;
      /* Check if software trigger enabled */
      if((tmp1 ==  DAC_CR_TEN1) && (tmp2 ==  DAC_CR_TSEL1))
      {
        /* Enable the selected DAC software conversion */
        SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG1);
      }
    }
    else
    {
      tmp1 = hdac->Instance->CR & DAC_CR_TEN2;
      tmp2 = hdac->Instance->CR & DAC_CR_TSEL2;
      /* Check if software trigger enabled */
      if((tmp1 == DAC_CR_TEN2) && (tmp2 == DAC_CR_TSEL2))
      {
        /* Enable the selected DAC software conversion*/
        SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG2);
      }
    }
  
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_READY;
  
    /* Process unlocked */
    __HAL_UNLOCK(hdac);
  
    /* Return function status */
    return HAL_OK;
  }
  
  /**
    * @brief  Enables DAC and starts conversion of channel using DMA.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected
    * @param  pData The destination peripheral Buffer address.
    * @param  Length The length of data to be transferred from memory to DAC peripheral
    * @param  Alignment Specifies the data alignment for DAC channel.
    *          This parameter can be one of the following values:
    *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
    *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
    *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t* pData, uint32_t Length, uint32_t Alignment)
  {
    uint32_t tmpreg = 0U;
  
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    assert_param(IS_DAC_ALIGN(Alignment));
  
    /* Process locked */
    __HAL_LOCK(hdac);
  
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_BUSY;
  
    if(Channel == DAC_CHANNEL_1)
    {
      /* Set the DMA transfer complete callback for channel1 */
      hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;
  
      /* Set the DMA half transfer complete callback for channel1 */
      hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;
  
      /* Set the DMA error callback for channel1 */
      hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;
  
      /* Enable the selected DAC channel1 DMA request */
      SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
         
      /* Case of use of channel 1 */
      switch(Alignment)
      {
        case DAC_ALIGN_12B_R:
          /* Get DHR12R1 address */
          tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
          break;
        case DAC_ALIGN_12B_L:
          /* Get DHR12L1 address */
          tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
          break;
        case DAC_ALIGN_8B_R:
          /* Get DHR8R1 address */
          tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
          break;
        default:
          break;
      }
      UNUSED(tmpreg);		/* avoid warning on tmpreg affectation with stupid compiler */
    }
    else
    {
      /* Set the DMA transfer complete callback for channel2 */
      hdac->DMA_Handle2->XferCpltCallback = DAC_DMAConvCpltCh2;
  
      /* Set the DMA half transfer complete callback for channel2 */
      hdac->DMA_Handle2->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh2;
      
      /* Set the DMA error callback for channel2 */
      hdac->DMA_Handle2->XferErrorCallback = DAC_DMAErrorCh2;
  
      /* Enable the selected DAC channel2 DMA request */
      SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
  
      /* Case of use of channel 2 */
      switch(Alignment)
      {
        case DAC_ALIGN_12B_R:
          /* Get DHR12R2 address */
          tmpreg = (uint32_t)&hdac->Instance->DHR12R2;
          break;
        case DAC_ALIGN_12B_L:
          /* Get DHR12L2 address */
          tmpreg = (uint32_t)&hdac->Instance->DHR12L2;
          break;
        case DAC_ALIGN_8B_R:
          /* Get DHR8R2 address */
          tmpreg = (uint32_t)&hdac->Instance->DHR8R2;
          break;
        default:
          break;
      }
    }
    
    /* Enable the DMA Stream */
    if(Channel == DAC_CHANNEL_1)
    {
      /* Enable the DAC DMA underrun interrupt */
      __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);
      
      /* Enable the DMA Stream */
      HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
    } 
    else
    {
      /* Enable the DAC DMA underrun interrupt */
      __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR2);
      
      /* Enable the DMA Stream */
      HAL_DMA_Start_IT(hdac->DMA_Handle2, (uint32_t)pData, tmpreg, Length);
    }
    
    /* Enable the Peripharal */
    __HAL_DAC_ENABLE(hdac, Channel);
    
    /* Process Unlocked */
    __HAL_UNLOCK(hdac);
    
    /* Return function status */
    return HAL_OK;
  }
  
  /**
    * @brief  Disables DAC and stop conversion of channel.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_Stop_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel)
  {
    HAL_StatusTypeDef status = HAL_OK;
  
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
  
    /* Disable the selected DAC channel DMA request */
    CLEAR_BIT(hdac->Instance->CR, (DAC_CR_DMAEN1 << Channel));
  
    /* Disable the Peripharal */
    __HAL_DAC_DISABLE(hdac, Channel);
  
    /* Disable the DMA Channel */
    /* Channel1 is used */
    if(Channel == DAC_CHANNEL_1)
    { 
      status = HAL_DMA_Abort(hdac->DMA_Handle1);
    }
    else /* Channel2 is used for */
    { 
      status = HAL_DMA_Abort(hdac->DMA_Handle2); 
    }
  
    /* Check if DMA Channel effectively disabled */
    if(status != HAL_OK)
    {
      /* Update DAC state machine to error */
      hdac->State = HAL_DAC_STATE_ERROR;
    }
    else
    {
      /* Change DAC state */
      hdac->State = HAL_DAC_STATE_READY;
    }
  
    /* Return function status */
    return status;
  }
  
  /**
    * @brief  Returns 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.
    * @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 The selected DAC channel data output value.
    */
  uint32_t HAL_DAC_GetValue(DAC_HandleTypeDef* hdac, uint32_t Channel)
  {
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    
    /* Returns the DAC channel data output register value */
    if(Channel == DAC_CHANNEL_1)
    {
      return hdac->Instance->DOR1;
    }
    else
    {
      return hdac->Instance->DOR2;
    }
  }
  
  /**
    * @brief  Handles DAC interrupt request
    * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @retval None
    */
  void HAL_DAC_IRQHandler(DAC_HandleTypeDef* hdac)
  {
    /* Check underrun flag of DAC channel 1 */
    if(__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR1))
    {
      /* Change DAC state to error state */
      hdac->State = HAL_DAC_STATE_ERROR;
  
      /* Set DAC error code to chanel1 DMA underrun error */
      hdac->ErrorCode |= HAL_DAC_ERROR_DMAUNDERRUNCH1;
  
      /* Clear the underrun flag */
      __HAL_DAC_CLEAR_FLAG(hdac,DAC_FLAG_DMAUDR1);
  
      /* Disable the selected DAC channel1 DMA request */
      CLEAR_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
  
      /* Error callback */
  #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
        hdac->DMAUnderrunCallbackCh1(hdac);
  #else
      HAL_DAC_DMAUnderrunCallbackCh1(hdac);
  #endif
    }
    
    /* Check underrun flag of DAC channel 2 */
    if(__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR2))
    {
      /* Change DAC state to error state */
      hdac->State = HAL_DAC_STATE_ERROR;
      
      /* Set DAC error code to channel2 DMA underrun error */
      hdac->ErrorCode |= HAL_DAC_ERROR_DMAUNDERRUNCH2;
      
      /* Clear the underrun flag */
      __HAL_DAC_CLEAR_FLAG(hdac,DAC_FLAG_DMAUDR2);
      
      /* Disable the selected DAC channel1 DMA request */
      CLEAR_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
        
      /* Error callback */ 
  #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
        hdac->DMAUnderrunCallbackCh2(hdac);
  #else
      HAL_DACEx_DMAUnderrunCallbackCh2(hdac);
  #endif
    }
  }
  
  
  /**
    * @brief  Set the specified data holding register value for DAC channel.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    *            @arg DAC_CHANNEL_2: DAC Channel2 selected
    * @param  Alignment Specifies the data alignment.
    *          This parameter can be one of the following values:
    *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
    *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
    *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
    * @param  Data Data to be loaded in the selected data holding register.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_SetValue(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t Alignment, uint32_t Data)
  {
    __IO uint32_t tmp = 0U;
  
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    assert_param(IS_DAC_ALIGN(Alignment));
    assert_param(IS_DAC_DATA(Data));
  
    tmp = (uint32_t)hdac->Instance; 
    if(Channel == DAC_CHANNEL_1)
    {
      tmp += DAC_DHR12R1_ALIGNMENT(Alignment);
    }
    else
    {
      tmp += DAC_DHR12R2_ALIGNMENT(Alignment);
    }
  
    /* Set the DAC channel selected data holding register */
    *(__IO uint32_t *) tmp = Data;
  
    /* Return function status */
    return HAL_OK;
  }
  #else /* All products with only one channel */
  
  /**
    * @brief  Enables DAC and starts conversion of channel.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_Start(DAC_HandleTypeDef* hdac, uint32_t Channel)
  {
    uint32_t tmp1 = 0U, tmp2 = 0U;
    
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
  
    /* Process locked */
    __HAL_LOCK(hdac);
  
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_BUSY;
  
    /* Enable the Peripharal */
    __HAL_DAC_ENABLE(hdac, Channel);
  
    tmp1 = hdac->Instance->CR & DAC_CR_TEN1;
    tmp2 = hdac->Instance->CR & DAC_CR_TSEL1;
    /* Check if software trigger enabled */
    if((tmp1 ==  DAC_CR_TEN1) && (tmp2 ==  DAC_CR_TSEL1))
    {
      /* Enable the selected DAC software conversion */
      SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG1);
    }
  
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_READY;
  
    /* Process unlocked */
    __HAL_UNLOCK(hdac);
  
    /* Return function status */
    return HAL_OK;
  }
  
  /**
    * @brief  Enables DAC and starts conversion of channel using DMA.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    * @param  pData The destination peripheral Buffer address.
    * @param  Length The length of data to be transferred from memory to DAC peripheral
    * @param  Alignment Specifies the data alignment for DAC channel.
    *          This parameter can be one of the following values:
    *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
    *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
    *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t* pData, uint32_t Length, uint32_t Alignment)
  {
    uint32_t tmpreg = 0U;
  
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    assert_param(IS_DAC_ALIGN(Alignment));
  
    /* Process locked */
    __HAL_LOCK(hdac);
  
    /* Change DAC state */
    hdac->State = HAL_DAC_STATE_BUSY;
  
    /* Set the DMA transfer complete callback for channel1 */
    hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;
  
    /* Set the DMA half transfer complete callback for channel1 */
    hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;
  
    /* Set the DMA error callback for channel1 */
    hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;
  
    /* Enable the selected DAC channel1 DMA request */
    SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
       
    /* Case of use of channel 1 */
    switch(Alignment)
    {
      case DAC_ALIGN_12B_R:
        /* Get DHR12R1 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
        break;
      case DAC_ALIGN_12B_L:
        /* Get DHR12L1 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
        break;
      case DAC_ALIGN_8B_R:
        /* Get DHR8R1 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
        break;
      default:
        break;
    }
    UNUSED(tmpreg);		/* avoid warning on tmpreg affectation with stupid compiler */
    
    /* Enable the DMA Stream */
    /* Enable the DAC DMA underrun interrupt */
    __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);
    
    /* Enable the DMA Stream */
    HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
    
    /* Enable the Peripharal */
    __HAL_DAC_ENABLE(hdac, Channel);
    
    /* Process Unlocked */
    __HAL_UNLOCK(hdac);
    
    /* Return function status */
    return HAL_OK;
  }
  
  /**
    * @brief  Disables DAC and stop conversion of channel.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_Stop_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel)
  {
    HAL_StatusTypeDef status = HAL_OK;
  
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
  
    /* Disable the selected DAC channel DMA request */
    CLEAR_BIT(hdac->Instance->CR, (DAC_CR_DMAEN1 << Channel));
  
    /* Disable the Peripharal */
    __HAL_DAC_DISABLE(hdac, Channel);
  
    /* Disable the DMA Channel */
    status = HAL_DMA_Abort(hdac->DMA_Handle1);
  
    /* Check if DMA Channel effectively disabled */
    if(status != HAL_OK)
    {
      /* Update DAC state machine to error */
      hdac->State = HAL_DAC_STATE_ERROR;
    }
    else
    {
      /* Change DAC state */
      hdac->State = HAL_DAC_STATE_READY;
    }
  
    /* Return function status */
    return status;
  }
  
  /**
    * @brief  Returns 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.
    * @param  Channel The selected DAC channel. 
    *          This parameter can be one of the following values:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    * @retval The selected DAC channel data output value.
    */
  uint32_t HAL_DAC_GetValue(DAC_HandleTypeDef* hdac, uint32_t Channel)
  {
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    
    /* Returns the DAC channel data output register value */
    return hdac->Instance->DOR1;
  }
  
  /**
    * @brief  Handles DAC interrupt request
    * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
    *         the configuration information for the specified DAC.
    * @retval None
    */
  void HAL_DAC_IRQHandler(DAC_HandleTypeDef* hdac)
  {
    /* Check underrun flag of DAC channel 1 */
    if(__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR1))
    {
      /* Change DAC state to error state */
      hdac->State = HAL_DAC_STATE_ERROR;
  
      /* Set DAC error code to chanel1 DMA underrun error */
      hdac->ErrorCode |= HAL_DAC_ERROR_DMAUNDERRUNCH1;
  
      /* Clear the underrun flag */
      __HAL_DAC_CLEAR_FLAG(hdac,DAC_FLAG_DMAUDR1);
  
      /* Disable the selected DAC channel1 DMA request */
      CLEAR_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
  
      /* Error callback */
      HAL_DAC_DMAUnderrunCallbackCh1(hdac);
    }
  }
  
  /**
    * @brief  Set the specified data holding register value for DAC channel.
    * @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:
    *            @arg DAC_CHANNEL_1: DAC Channel1 selected
    * @param  Alignment Specifies the data alignment.
    *          This parameter can be one of the following values:
    *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
    *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
    *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
    * @param  Data Data to be loaded in the selected data holding register.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DAC_SetValue(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t Alignment, uint32_t Data)
  {
    __IO uint32_t tmp = 0U;
  
    /* Check the parameters */
    assert_param(IS_DAC_CHANNEL(Channel));
    assert_param(IS_DAC_ALIGN(Alignment));
    assert_param(IS_DAC_DATA(Data));
  
    tmp = (uint32_t)hdac->Instance; 
    tmp += DAC_DHR12R1_ALIGNMENT(Alignment);
  
    /* Set the DAC channel selected data holding register */
    *(__IO uint32_t *) tmp = Data;
  
    /* Return function status */
    return HAL_OK;
  }
  
  #endif  /* #if defined (STM32L072xx) || defined (STM32L073xx) || defined (STM32L082xx) || defined (STM32L083xx) */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /** @addtogroup DACEx_Private
    * @{
    */
  #if defined (STM32L072xx) || defined (STM32L073xx) || defined (STM32L082xx) || defined (STM32L083xx)
  /**
    * @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
    */
  static 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
    */
  static 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
    */
  static 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 /* STM32L072xx || STM32L073xx || STM32L082xx || STM32L083xx */
  
  /**
    * @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
    */
  static void DAC_DMAConvCpltCh1(DMA_HandleTypeDef *hdma)   
  {
    DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
    
  #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
    hdac->ConvCpltCallbackCh1(hdac);
  #else
    HAL_DAC_ConvCpltCallbackCh1(hdac); 
  #endif
    
    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
    */
  static void DAC_DMAHalfConvCpltCh1(DMA_HandleTypeDef *hdma)
  {
    DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  
    /* Conversion complete callback */
  #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
    hdac->ConvHalfCpltCallbackCh1(hdac);
  #else
    HAL_DAC_ConvHalfCpltCallbackCh1(hdac);
  #endif  
  }
  
  /**
    * @brief  DMA error callback
    * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
    *                the configuration information for the specified DMA module.
    * @retval None
    */
  static void DAC_DMAErrorCh1(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_DAC_ErrorCallbackCh1(hdac);
  
    hdac->State= HAL_DAC_STATE_READY;
  }
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  #endif /* HAL_DAC_MODULE_ENABLED */
  #endif /* #if !defined (STM32L010xB) && !defined (STM32L010x8) && !defined (STM32L010x6) && !defined (STM32L010x4) && !defined (STM32L011xx) && !defined (STM32L021xx) && !defined (STM32L031xx) && !defined (STM32L041xx) && !defined (STM32L051xx) && !defined (STM32L061xx) && !defined (STM32L071xx) && !defined (STM32L081xx) */
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  
  