Initialization and de-initialization functions

Functions
ErrorStatus	LL_DAC_DeInit (DAC_TypeDef *DACx)
	De-initialize registers of the selected DAC instance to their default reset values. More...
ErrorStatus	LL_DAC_Init (DAC_TypeDef *DACx, uint32_t DAC_Channel, LL_DAC_InitTypeDef *DAC_InitStruct)
	Initialize some features of DAC channel. More...
void	LL_DAC_StructInit (LL_DAC_InitTypeDef *DAC_InitStruct)
	Set each LL_DAC_InitTypeDef field to default value. More...

Detailed Description

Function Documentation

LL_DAC_DeInit()

ErrorStatus LL_DAC_DeInit

(

DAC_TypeDef *

DACx

)

De-initialize registers of the selected DAC instance to their default reset values.

Parameters

DACx	DAC instance

Return values

An	ErrorStatus enumeration value: SUCCESS: DAC registers are de-initialized ERROR: not applicable

Definition at line 167 of file stm32l4xx_ll_dac.c.

{
  /* 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;
}

LL_DAC_Init()

ErrorStatus LL_DAC_Init	(	DAC_TypeDef *	DACx,
		uint32_t	DAC_Channel,
		LL_DAC_InitTypeDef *	DAC_InitStruct
	)

Initialize some features of DAC channel.

Note

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 LL_DAC_ConvertData12RightAligned LL_DAC_ConvertData12LeftAligned LL_DAC_ConvertData8RightAligned or one of the supported autogenerated wave.

This function allows configuration of:

• Output mode
• Trigger
• Wave generation

The setting of these parameters by function LL_DAC_Init() is conditioned to DAC state: DAC channel must be disabled.

Parameters

DACx	DAC instance
DAC_Channel	This parameter can be one of the following values: LL_DAC_CHANNEL_1 LL_DAC_CHANNEL_2 (1) (1) On this STM32 serie, parameter not available on all devices. Refer to device datasheet for channels availability.
DAC_InitStruct	Pointer to a LL_DAC_InitTypeDef structure

Return values

An	ErrorStatus enumeration value: SUCCESS: DAC registers are initialized ERROR: DAC registers are not initialized

Definition at line 209 of file stm32l4xx_ll_dac.c.

{
  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_OUTPUT_CONNECTION(DAC_InitStruct->OutputConnection));
  assert_param(IS_LL_DAC_OUTPUT_MODE(DAC_InitStruct->OutputMode));
  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                                                        */
    /*  - OutputConnection                                                    */
    /*  - 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_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                ,
                 (DAC_InitStruct->TriggerSource
                  | DAC_InitStruct->WaveAutoGeneration
                  | DAC_InitStruct->WaveAutoGenerationConfig
                 ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                );
    }
    else
    {
      MODIFY_REG(DACx->CR,
                 (DAC_CR_TSEL1
                  | DAC_CR_WAVE1
                 ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                ,
                 (DAC_InitStruct->TriggerSource
                  | LL_DAC_WAVE_AUTO_GENERATION_NONE
                 ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
                );
    }
    MODIFY_REG(DACx->MCR,
               (DAC_MCR_MODE1_1
                | DAC_MCR_MODE1_0
                | DAC_MCR_MODE1_2
               ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
              ,
               (DAC_InitStruct->OutputBuffer
                | DAC_InitStruct->OutputConnection
                | DAC_InitStruct->OutputMode
               ) << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK)
              );
  }
  else
  {
    /* Initialization error: DAC instance is not disabled.                    */
    status = ERROR;
  }
  return status;
}

LL_DAC_StructInit()

void LL_DAC_StructInit

(

LL_DAC_InitTypeDef *

DAC_InitStruct

)

Set each LL_DAC_InitTypeDef field to default value.

Parameters

DAC_InitStruct

pointer to a LL_DAC_InitTypeDef structure whose fields will be set to default values.

Return values

None

Definition at line 289 of file stm32l4xx_ll_dac.c.

{
  /* 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;
  DAC_InitStruct->OutputConnection         = LL_DAC_OUTPUT_CONNECT_GPIO;
  DAC_InitStruct->OutputMode               = LL_DAC_OUTPUT_MODE_NORMAL;
}