text: /**
    ******************************************************************************
    * @file    stm32f2xx_ll_dac.c
    * @author  MCD Application Team
    * @brief   DAC LL module driver
    ******************************************************************************
    * @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(USE_FULL_LL_DRIVER)
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f2xx_ll_dac.h"
  #include "stm32f2xx_ll_bus.h"
  
  #ifdef USE_FULL_ASSERT
  #include "stm32_assert.h"
  #else
  #define assert_param(expr) ((void)0U)
  #endif
  
  /** @addtogroup STM32F2xx_LL_Driver
    * @{
    */
  
  #if defined(DAC)
  
  /** @addtogroup DAC_LL DAC
    * @{
    */
  
  /* Private types -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private constants ---------------------------------------------------------*/
  /* Private macros ------------------------------------------------------------*/
  
  /** @addtogroup DAC_LL_Private_Macros
    * @{
    */
  #define IS_LL_DAC_CHANNEL(__DAC_CHANNEL__)                                     \
    (                                                                            \
        ((__DAC_CHANNEL__) == LL_DAC_CHANNEL_1)                                  \
     || ((__DAC_CHANNEL__) == LL_DAC_CHANNEL_2)                                  \
    )
  
  #define IS_LL_DAC_TRIGGER_SOURCE(__TRIGGER_SOURCE__)                           \
    (   ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_SOFTWARE)                           \
     || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM2_TRGO)                      \
     || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM4_TRGO)                      \
     || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM5_TRGO)                      \
     || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM6_TRGO)                      \
     || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM7_TRGO)                      \
     || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM8_TRGO)                      \
     || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_EXTI_LINE9)                     \
    )
  
  #define IS_LL_DAC_WAVE_AUTO_GENER_MODE(__WAVE_AUTO_GENERATION_MODE__)           \
    (   ((__WAVE_AUTO_GENERATION_MODE__) == LL_DAC_WAVE_AUTO_GENERATION_NONE)     \
     || ((__WAVE_AUTO_GENERATION_MODE__) == LL_DAC_WAVE_AUTO_GENERATION_NOISE)    \
     || ((__WAVE_AUTO_GENERATION_MODE__) == LL_DAC_WAVE_AUTO_GENERATION_TRIANGLE) \
    )
  
  #define IS_LL_DAC_WAVE_AUTO_GENER_CONFIG(__WAVE_AUTO_GENERATION_MODE__, __WAVE_AUTO_GENERATION_CONFIG__)  \
    ( (((__WAVE_AUTO_GENERATION_MODE__) == LL_DAC_WAVE_AUTO_GENERATION_NOISE)                               \
      && (  ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BIT0)                            \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS1_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS2_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS3_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS4_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS5_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS6_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS7_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS8_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS9_0)                         \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS10_0)                        \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_NOISE_LFSR_UNMASK_BITS11_0))                       \
      )                                                                                                     \
    ||(((__WAVE_AUTO_GENERATION_MODE__) == LL_DAC_WAVE_AUTO_GENERATION_TRIANGLE)                            \
      && (  ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_1)                              \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_3)                              \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_7)                              \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_15)                             \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_31)                             \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_63)                             \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_127)                            \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_255)                            \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_511)                            \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_1023)                           \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_2047)                           \
         || ((__WAVE_AUTO_GENERATION_CONFIG__) == LL_DAC_TRIANGLE_AMPLITUDE_4095))                          \
      )                                                                                                     \
    )
  
  #define IS_LL_DAC_OUTPUT_BUFFER(__OUTPUT_BUFFER__)                             \
    (   ((__OUTPUT_BUFFER__) == LL_DAC_OUTPUT_BUFFER_ENABLE)                     \
     || ((__OUTPUT_BUFFER__) == LL_DAC_OUTPUT_BUFFER_DISABLE)                    \
    )
  
  /**
    * @}
    */
  
  
  /* Private function prototypes -----------------------------------------------*/
  
  /* Exported functions --------------------------------------------------------*/
  /** @addtogroup DAC_LL_Exported_Functions
    * @{
    */
  
  /** @addtogroup DAC_LL_EF_Init
    * @{
    */
  
  /**
    * @brief  De-initialize registers of the selected DAC instance
    *         to their default reset values.
    * @param  DACx DAC instance
    * @retval An ErrorStatus enumeration value:
    *          - SUCCESS: DAC registers are de-initialized
    *          - ERROR: not applicable
    */
  ErrorStatus LL_DAC_DeInit(DAC_TypeDef *DACx)
  {
    /* Check the parameters */
    assert_param(IS_DAC_ALL_INSTANCE(DACx));
  
    /* Force reset of DAC clock */
    LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_DAC1);
  
    /* Release reset of DAC clock */
    LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_DAC1);
  
    return SUCCESS;
  }
  
  /**
    * @brief  Initialize some features of DAC channel.
    * @note   @ref LL_DAC_Init() aims to ease basic configuration of a DAC channel.
    *         Leaving it ready to be enabled and output:
    *         a level by calling one of
    *           @ref LL_DAC_ConvertData12RightAligned
    *           @ref LL_DAC_ConvertData12LeftAligned
    *           @ref LL_DAC_ConvertData8RightAligned
    *         or one of the supported autogenerated wave.
    * @note   This function allows configuration of:
    *          - Output mode
    *          - Trigger
    *          - Wave generation
    * @note   The setting of these parameters by function @ref LL_DAC_Init()
    *         is conditioned to DAC state:
    *         DAC channel must be disabled.
    * @param  DACx DAC instance
    * @param  DAC_Channel This parameter can be one of the following values:
    *         @arg @ref LL_DAC_CHANNEL_1
    *         @arg @ref LL_DAC_CHANNEL_2
    * @param  DAC_InitStruct Pointer to a @ref LL_DAC_InitTypeDef structure
    * @retval An ErrorStatus enumeration value:
    *          - SUCCESS: DAC registers are initialized
    *          - ERROR: DAC registers are not initialized
    */
  ErrorStatus LL_DAC_Init(DAC_TypeDef *DACx, uint32_t DAC_Channel, LL_DAC_InitTypeDef *DAC_InitStruct)
  {
    ErrorStatus status = SUCCESS;
  
    /* Check the parameters */
    assert_param(IS_DAC_ALL_INSTANCE(DACx));
    assert_param(IS_LL_DAC_CHANNEL(DAC_Channel));
    assert_param(IS_LL_DAC_TRIGGER_SOURCE(DAC_InitStruct->TriggerSource));
    assert_param(IS_LL_DAC_OUTPUT_BUFFER(DAC_InitStruct->OutputBuffer));
    assert_param(IS_LL_DAC_WAVE_AUTO_GENER_MODE(DAC_InitStruct->WaveAutoGeneration));
    if (DAC_InitStruct->WaveAutoGeneration != LL_DAC_WAVE_AUTO_GENERATION_NONE)
    {
      assert_param(IS_LL_DAC_WAVE_AUTO_GENER_CONFIG(DAC_InitStruct->WaveAutoGeneration,
                                                    DAC_InitStruct->WaveAutoGenerationConfig));
    }
  
    /* Note: Hardware constraint (refer to description of this function)        */
    /*       DAC instance must be disabled.                                     */
    if (LL_DAC_IsEnabled(DACx, DAC_Channel) == 0U)
    {
      /* Configuration of DAC channel:                                          */
      /*  - TriggerSource                                                       */
      /*  - WaveAutoGeneration                                                  */
      /*  - OutputBuffer                                                        */
      /*  - OutputMode                                                          */
      if (DAC_InitStruct->WaveAutoGeneration != LL_DAC_WAVE_AUTO_GENERATION_NONE)
      {
        MODIFY_REG(DACx->CR,
                   (DAC_CR_TSEL1
                    | DAC_CR_WAVE1
                    | DAC_CR_MAMP1
                    | DAC_CR_BOFF1
                   ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                   ,
                   (DAC_InitStruct->TriggerSource
                    | DAC_InitStruct->WaveAutoGeneration
                    | DAC_InitStruct->WaveAutoGenerationConfig
                    | DAC_InitStruct->OutputBuffer
                   ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                  );
      }
      else
      {
        MODIFY_REG(DACx->CR,
                   (DAC_CR_TSEL1
                    | DAC_CR_WAVE1
                    | DAC_CR_BOFF1
                   ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                   ,
                   (DAC_InitStruct->TriggerSource
                    | LL_DAC_WAVE_AUTO_GENERATION_NONE
                    | DAC_InitStruct->OutputBuffer
                   ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                  );
      }
    }
    else
    {
      /* Initialization error: DAC instance is not disabled.                    */
      status = ERROR;
    }
    return status;
  }
  
  /**
    * @brief Set each @ref LL_DAC_InitTypeDef field to default value.
    * @param DAC_InitStruct pointer to a @ref LL_DAC_InitTypeDef structure
    *                       whose fields will be set to default values.
    * @retval None
    */
  void LL_DAC_StructInit(LL_DAC_InitTypeDef *DAC_InitStruct)
  {
    /* Set DAC_InitStruct fields to default values */
    DAC_InitStruct->TriggerSource            = LL_DAC_TRIG_SOFTWARE;
    DAC_InitStruct->WaveAutoGeneration       = LL_DAC_WAVE_AUTO_GENERATION_NONE;
    /* Note: Parameter discarded if wave auto generation is disabled,           */
    /*       set anyway to its default value.                                   */
    DAC_InitStruct->WaveAutoGenerationConfig = LL_DAC_NOISE_LFSR_UNMASK_BIT0;
    DAC_InitStruct->OutputBuffer             = LL_DAC_OUTPUT_BUFFER_ENABLE;
  }
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #endif /* DAC */
  
  /**
    * @}
    */
  
  #endif /* USE_FULL_LL_DRIVER */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  