Src/stm32l0xx_ll_dac.c

/**
  ******************************************************************************
  * @file    stm32l0xx_ll_dac.c
  * @author  MCD Application Team
  * @brief   DAC LL module driver
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
#if defined(USE_FULL_LL_DRIVER)

/* Includes ------------------------------------------------------------------*/
#include "stm32l0xx_ll_dac.h"
#include "stm32l0xx_ll_bus.h"

#ifdef USE_FULL_ASSERT
  #include "stm32_assert.h"
#else
  #define assert_param(expr) ((void)0U)
#endif

/** @addtogroup STM32L0xx_LL_Driver
  * @{
  */

#if defined (DAC1)

/** @addtogroup DAC_LL DAC
  * @{
  */

/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/

/** @addtogroup DAC_LL_Private_Macros
  * @{
  */

#if defined(DAC_CHANNEL2_SUPPORT)
#define IS_LL_DAC_CHANNEL(__DACX__, __DAC_CHANNEL__)                           \
  (                                                                            \
      ((__DAC_CHANNEL__) == LL_DAC_CHANNEL_1)                                  \
   || ((__DAC_CHANNEL__) == LL_DAC_CHANNEL_2)                                  \
  )
#else
#define IS_LL_DAC_CHANNEL(__DACX__, __DAC_CHANNEL__)                           \
  (                                                                            \
   ((__DAC_CHANNEL__) == LL_DAC_CHANNEL_1)                                     \
  )
#endif /* DAC_CHANNEL2_SUPPORT */

#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_TIM3_TRGO)                      \
   || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM3_CH3)                       \
   || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM6_TRGO)                      \
   || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM7_TRGO)                      \
   || ((__TRIGGER_SOURCE__) == LL_DAC_TRIG_EXT_TIM21_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_CONFIG__)      \
  (   ((__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_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 instance.
  * @note   The setting of these parameters by function @ref LL_DAC_Init()
  *         is conditioned to DAC state:
  *         DAC instance 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 (1)
  *         
  *         (1) On this STM32 serie, parameter not available on all devices.
  *             Refer to device datasheet for channels availability.
  * @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(DACx, 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->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                                                        */
    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 /* DAC1 */

/**
  * @}
  */

#endif /* USE_FULL_LL_DRIVER */