stm32f4xx_dac.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_dac.h"
#include "stm32f4xx_rcc.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

/* CR register Mask */
#define CR_CLEAR_MASK              ((uint32_t)0x00000FFE)

/* DAC Dual Channels SWTRIG masks */
#define DUAL_SWTRIG_SET            ((uint32_t)0x00000003)
#define DUAL_SWTRIG_RESET          ((uint32_t)0xFFFFFFFC)

/* DHR registers offsets */
#define DHR12R1_OFFSET             ((uint32_t)0x00000008)
#define DHR12R2_OFFSET             ((uint32_t)0x00000014)
#define DHR12RD_OFFSET             ((uint32_t)0x00000020)

/* DOR register offset */
#define DOR_OFFSET                 ((uint32_t)0x0000002C)

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

void DAC_DeInit(void)
{
  /* Enable DAC reset state */
  RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, ENABLE);
  /* Release DAC from reset state */
  RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, DISABLE);
}

void DAC_Init(uint32_t DAC_Channel, DAC_InitTypeDef* DAC_InitStruct)
{
  uint32_t tmpreg1 = 0, tmpreg2 = 0;

  /* Check the DAC parameters */
  assert_param(IS_DAC_TRIGGER(DAC_InitStruct->DAC_Trigger));
  assert_param(IS_DAC_GENERATE_WAVE(DAC_InitStruct->DAC_WaveGeneration));
  assert_param(IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude));
  assert_param(IS_DAC_OUTPUT_BUFFER_STATE(DAC_InitStruct->DAC_OutputBuffer));

/*---------------------------- DAC CR Configuration --------------------------*/
  /* Get the DAC CR value */
  tmpreg1 = DAC->CR;
  /* Clear BOFFx, TENx, TSELx, WAVEx and MAMPx bits */
  tmpreg1 &= ~(CR_CLEAR_MASK << DAC_Channel);
  /* Configure for the selected DAC channel: buffer output, trigger, 
     wave generation, mask/amplitude for wave generation */
  /* Set TSELx and TENx bits according to DAC_Trigger value */
  /* Set WAVEx bits according to DAC_WaveGeneration value */
  /* Set MAMPx bits according to DAC_LFSRUnmask_TriangleAmplitude value */ 
  /* Set BOFFx bit according to DAC_OutputBuffer value */   
  tmpreg2 = (DAC_InitStruct->DAC_Trigger | DAC_InitStruct->DAC_WaveGeneration |
             DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude | \
             DAC_InitStruct->DAC_OutputBuffer);
  /* Calculate CR register value depending on DAC_Channel */
  tmpreg1 |= tmpreg2 << DAC_Channel;
  /* Write to DAC CR */
  DAC->CR = tmpreg1;
}

void DAC_StructInit(DAC_InitTypeDef* DAC_InitStruct)
{
/*--------------- Reset DAC init structure parameters values -----------------*/
  /* Initialize the DAC_Trigger member */
  DAC_InitStruct->DAC_Trigger = DAC_Trigger_None;
  /* Initialize the DAC_WaveGeneration member */
  DAC_InitStruct->DAC_WaveGeneration = DAC_WaveGeneration_None;
  /* Initialize the DAC_LFSRUnmask_TriangleAmplitude member */
  DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;
  /* Initialize the DAC_OutputBuffer member */
  DAC_InitStruct->DAC_OutputBuffer = DAC_OutputBuffer_Enable;
}

void DAC_Cmd(uint32_t DAC_Channel, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DAC channel */
    DAC->CR |= (DAC_CR_EN1 << DAC_Channel);
  }
  else
  {
    /* Disable the selected DAC channel */
    DAC->CR &= (~(DAC_CR_EN1 << DAC_Channel));
  }
}

void DAC_SoftwareTriggerCmd(uint32_t DAC_Channel, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable software trigger for the selected DAC channel */
    DAC->SWTRIGR |= (uint32_t)DAC_SWTRIGR_SWTRIG1 << (DAC_Channel >> 4);
  }
  else
  {
    /* Disable software trigger for the selected DAC channel */
    DAC->SWTRIGR &= ~((uint32_t)DAC_SWTRIGR_SWTRIG1 << (DAC_Channel >> 4));
  }
}

void DAC_DualSoftwareTriggerCmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable software trigger for both DAC channels */
    DAC->SWTRIGR |= DUAL_SWTRIG_SET;
  }
  else
  {
    /* Disable software trigger for both DAC channels */
    DAC->SWTRIGR &= DUAL_SWTRIG_RESET;
  }
}

void DAC_WaveGenerationCmd(uint32_t DAC_Channel, uint32_t DAC_Wave, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_DAC_WAVE(DAC_Wave)); 
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected wave generation for the selected DAC channel */
    DAC->CR |= DAC_Wave << DAC_Channel;
  }
  else
  {
    /* Disable the selected wave generation for the selected DAC channel */
    DAC->CR &= ~(DAC_Wave << DAC_Channel);
  }
}

void DAC_SetChannel1Data(uint32_t DAC_Align, uint16_t Data)
{  
  __IO uint32_t tmp = 0;
  
  /* Check the parameters */
  assert_param(IS_DAC_ALIGN(DAC_Align));
  assert_param(IS_DAC_DATA(Data));
  
  tmp = (uint32_t)DAC_BASE; 
  tmp += DHR12R1_OFFSET + DAC_Align;

  /* Set the DAC channel1 selected data holding register */
  *(__IO uint32_t *) tmp = Data;
}

void DAC_SetChannel2Data(uint32_t DAC_Align, uint16_t Data)
{
  __IO uint32_t tmp = 0;

  /* Check the parameters */
  assert_param(IS_DAC_ALIGN(DAC_Align));
  assert_param(IS_DAC_DATA(Data));
  
  tmp = (uint32_t)DAC_BASE;
  tmp += DHR12R2_OFFSET + DAC_Align;

  /* Set the DAC channel2 selected data holding register */
  *(__IO uint32_t *)tmp = Data;
}

void DAC_SetDualChannelData(uint32_t DAC_Align, uint16_t Data2, uint16_t Data1)
{
  uint32_t data = 0, tmp = 0;
  
  /* Check the parameters */
  assert_param(IS_DAC_ALIGN(DAC_Align));
  assert_param(IS_DAC_DATA(Data1));
  assert_param(IS_DAC_DATA(Data2));
  
  /* Calculate and set dual DAC data holding register value */
  if (DAC_Align == DAC_Align_8b_R)
  {
    data = ((uint32_t)Data2 << 8) | Data1; 
  }
  else
  {
    data = ((uint32_t)Data2 << 16) | Data1;
  }
  
  tmp = (uint32_t)DAC_BASE;
  tmp += DHR12RD_OFFSET + DAC_Align;

  /* Set the dual DAC selected data holding register */
  *(__IO uint32_t *)tmp = data;
}

uint16_t DAC_GetDataOutputValue(uint32_t DAC_Channel)
{
  __IO uint32_t tmp = 0;
  
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  
  tmp = (uint32_t) DAC_BASE ;
  tmp += DOR_OFFSET + ((uint32_t)DAC_Channel >> 2);
  
  /* Returns the DAC channel data output register value */
  return (uint16_t) (*(__IO uint32_t*) tmp);
}
void DAC_DMACmd(uint32_t DAC_Channel, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DAC channel DMA request */
    DAC->CR |= (DAC_CR_DMAEN1 << DAC_Channel);
  }
  else
  {
    /* Disable the selected DAC channel DMA request */
    DAC->CR &= (~(DAC_CR_DMAEN1 << DAC_Channel));
  }
}
void DAC_ITConfig(uint32_t DAC_Channel, uint32_t DAC_IT, FunctionalState NewState)  
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  assert_param(IS_DAC_IT(DAC_IT)); 

  if (NewState != DISABLE)
  {
    /* Enable the selected DAC interrupts */
    DAC->CR |=  (DAC_IT << DAC_Channel);
  }
  else
  {
    /* Disable the selected DAC interrupts */
    DAC->CR &= (~(uint32_t)(DAC_IT << DAC_Channel));
  }
}

FlagStatus DAC_GetFlagStatus(uint32_t DAC_Channel, uint32_t DAC_FLAG)
{
  FlagStatus bitstatus = RESET;
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_DAC_FLAG(DAC_FLAG));

  /* Check the status of the specified DAC flag */
  if ((DAC->SR & (DAC_FLAG << DAC_Channel)) != (uint8_t)RESET)
  {
    /* DAC_FLAG is set */
    bitstatus = SET;
  }
  else
  {
    /* DAC_FLAG is reset */
    bitstatus = RESET;
  }
  /* Return the DAC_FLAG status */
  return  bitstatus;
}

void DAC_ClearFlag(uint32_t DAC_Channel, uint32_t DAC_FLAG)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_DAC_FLAG(DAC_FLAG));

  /* Clear the selected DAC flags */
  DAC->SR = (DAC_FLAG << DAC_Channel);
}

ITStatus DAC_GetITStatus(uint32_t DAC_Channel, uint32_t DAC_IT)
{
  ITStatus bitstatus = RESET;
  uint32_t enablestatus = 0;
  
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_DAC_IT(DAC_IT));

  /* Get the DAC_IT enable bit status */
  enablestatus = (DAC->CR & (DAC_IT << DAC_Channel)) ;
  
  /* Check the status of the specified DAC interrupt */
  if (((DAC->SR & (DAC_IT << DAC_Channel)) != (uint32_t)RESET) && enablestatus)
  {
    /* DAC_IT is set */
    bitstatus = SET;
  }
  else
  {
    /* DAC_IT is reset */
    bitstatus = RESET;
  }
  /* Return the DAC_IT status */
  return  bitstatus;
}

void DAC_ClearITPendingBit(uint32_t DAC_Channel, uint32_t DAC_IT)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(DAC_Channel));
  assert_param(IS_DAC_IT(DAC_IT)); 

  /* Clear the selected DAC interrupt pending bits */
  DAC->SR = (DAC_IT << DAC_Channel);
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/