stm32f10x_dma.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_dma.h"
#include "stm32f10x_rcc.h"

/* DMA1 Channelx interrupt pending bit masks */
#define DMA1_Channel1_IT_Mask    ((uint32_t)(DMA_ISR_GIF1 | DMA_ISR_TCIF1 | DMA_ISR_HTIF1 | DMA_ISR_TEIF1))
#define DMA1_Channel2_IT_Mask    ((uint32_t)(DMA_ISR_GIF2 | DMA_ISR_TCIF2 | DMA_ISR_HTIF2 | DMA_ISR_TEIF2))
#define DMA1_Channel3_IT_Mask    ((uint32_t)(DMA_ISR_GIF3 | DMA_ISR_TCIF3 | DMA_ISR_HTIF3 | DMA_ISR_TEIF3))
#define DMA1_Channel4_IT_Mask    ((uint32_t)(DMA_ISR_GIF4 | DMA_ISR_TCIF4 | DMA_ISR_HTIF4 | DMA_ISR_TEIF4))
#define DMA1_Channel5_IT_Mask    ((uint32_t)(DMA_ISR_GIF5 | DMA_ISR_TCIF5 | DMA_ISR_HTIF5 | DMA_ISR_TEIF5))
#define DMA1_Channel6_IT_Mask    ((uint32_t)(DMA_ISR_GIF6 | DMA_ISR_TCIF6 | DMA_ISR_HTIF6 | DMA_ISR_TEIF6))
#define DMA1_Channel7_IT_Mask    ((uint32_t)(DMA_ISR_GIF7 | DMA_ISR_TCIF7 | DMA_ISR_HTIF7 | DMA_ISR_TEIF7))

/* DMA2 Channelx interrupt pending bit masks */
#define DMA2_Channel1_IT_Mask    ((uint32_t)(DMA_ISR_GIF1 | DMA_ISR_TCIF1 | DMA_ISR_HTIF1 | DMA_ISR_TEIF1))
#define DMA2_Channel2_IT_Mask    ((uint32_t)(DMA_ISR_GIF2 | DMA_ISR_TCIF2 | DMA_ISR_HTIF2 | DMA_ISR_TEIF2))
#define DMA2_Channel3_IT_Mask    ((uint32_t)(DMA_ISR_GIF3 | DMA_ISR_TCIF3 | DMA_ISR_HTIF3 | DMA_ISR_TEIF3))
#define DMA2_Channel4_IT_Mask    ((uint32_t)(DMA_ISR_GIF4 | DMA_ISR_TCIF4 | DMA_ISR_HTIF4 | DMA_ISR_TEIF4))
#define DMA2_Channel5_IT_Mask    ((uint32_t)(DMA_ISR_GIF5 | DMA_ISR_TCIF5 | DMA_ISR_HTIF5 | DMA_ISR_TEIF5))

/* DMA2 FLAG mask */
#define FLAG_Mask                ((uint32_t)0x10000000)

/* DMA registers Masks */
#define CCR_CLEAR_Mask           ((uint32_t)0xFFFF800F)

void DMA_DeInit(DMA_Channel_TypeDef* DMAy_Channelx)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
  
  /* Disable the selected DMAy Channelx */
  DMAy_Channelx->CCR &= (uint16_t)(~DMA_CCR1_EN);
  
  /* Reset DMAy Channelx control register */
  DMAy_Channelx->CCR  = 0;
  
  /* Reset DMAy Channelx remaining bytes register */
  DMAy_Channelx->CNDTR = 0;
  
  /* Reset DMAy Channelx peripheral address register */
  DMAy_Channelx->CPAR  = 0;
  
  /* Reset DMAy Channelx memory address register */
  DMAy_Channelx->CMAR = 0;
  
  if (DMAy_Channelx == DMA1_Channel1)
  {
    /* Reset interrupt pending bits for DMA1 Channel1 */
    DMA1->IFCR |= DMA1_Channel1_IT_Mask;
  }
  else if (DMAy_Channelx == DMA1_Channel2)
  {
    /* Reset interrupt pending bits for DMA1 Channel2 */
    DMA1->IFCR |= DMA1_Channel2_IT_Mask;
  }
  else if (DMAy_Channelx == DMA1_Channel3)
  {
    /* Reset interrupt pending bits for DMA1 Channel3 */
    DMA1->IFCR |= DMA1_Channel3_IT_Mask;
  }
  else if (DMAy_Channelx == DMA1_Channel4)
  {
    /* Reset interrupt pending bits for DMA1 Channel4 */
    DMA1->IFCR |= DMA1_Channel4_IT_Mask;
  }
  else if (DMAy_Channelx == DMA1_Channel5)
  {
    /* Reset interrupt pending bits for DMA1 Channel5 */
    DMA1->IFCR |= DMA1_Channel5_IT_Mask;
  }
  else if (DMAy_Channelx == DMA1_Channel6)
  {
    /* Reset interrupt pending bits for DMA1 Channel6 */
    DMA1->IFCR |= DMA1_Channel6_IT_Mask;
  }
  else if (DMAy_Channelx == DMA1_Channel7)
  {
    /* Reset interrupt pending bits for DMA1 Channel7 */
    DMA1->IFCR |= DMA1_Channel7_IT_Mask;
  }
  else if (DMAy_Channelx == DMA2_Channel1)
  {
    /* Reset interrupt pending bits for DMA2 Channel1 */
    DMA2->IFCR |= DMA2_Channel1_IT_Mask;
  }
  else if (DMAy_Channelx == DMA2_Channel2)
  {
    /* Reset interrupt pending bits for DMA2 Channel2 */
    DMA2->IFCR |= DMA2_Channel2_IT_Mask;
  }
  else if (DMAy_Channelx == DMA2_Channel3)
  {
    /* Reset interrupt pending bits for DMA2 Channel3 */
    DMA2->IFCR |= DMA2_Channel3_IT_Mask;
  }
  else if (DMAy_Channelx == DMA2_Channel4)
  {
    /* Reset interrupt pending bits for DMA2 Channel4 */
    DMA2->IFCR |= DMA2_Channel4_IT_Mask;
  }
  else
  { 
    if (DMAy_Channelx == DMA2_Channel5)
    {
      /* Reset interrupt pending bits for DMA2 Channel5 */
      DMA2->IFCR |= DMA2_Channel5_IT_Mask;
    }
  }
}

void DMA_Init(DMA_Channel_TypeDef* DMAy_Channelx, DMA_InitTypeDef* DMA_InitStruct)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
  assert_param(IS_DMA_DIR(DMA_InitStruct->DMA_DIR));
  assert_param(IS_DMA_BUFFER_SIZE(DMA_InitStruct->DMA_BufferSize));
  assert_param(IS_DMA_PERIPHERAL_INC_STATE(DMA_InitStruct->DMA_PeripheralInc));
  assert_param(IS_DMA_MEMORY_INC_STATE(DMA_InitStruct->DMA_MemoryInc));   
  assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(DMA_InitStruct->DMA_PeripheralDataSize));
  assert_param(IS_DMA_MEMORY_DATA_SIZE(DMA_InitStruct->DMA_MemoryDataSize));
  assert_param(IS_DMA_MODE(DMA_InitStruct->DMA_Mode));
  assert_param(IS_DMA_PRIORITY(DMA_InitStruct->DMA_Priority));
  assert_param(IS_DMA_M2M_STATE(DMA_InitStruct->DMA_M2M));

/*--------------------------- DMAy Channelx CCR Configuration -----------------*/
  /* Get the DMAy_Channelx CCR value */
  tmpreg = DMAy_Channelx->CCR;
  /* Clear MEM2MEM, PL, MSIZE, PSIZE, MINC, PINC, CIRC and DIR bits */
  tmpreg &= CCR_CLEAR_Mask;
  /* Configure DMAy Channelx: data transfer, data size, priority level and mode */
  /* Set DIR bit according to DMA_DIR value */
  /* Set CIRC bit according to DMA_Mode value */
  /* Set PINC bit according to DMA_PeripheralInc value */
  /* Set MINC bit according to DMA_MemoryInc value */
  /* Set PSIZE bits according to DMA_PeripheralDataSize value */
  /* Set MSIZE bits according to DMA_MemoryDataSize value */
  /* Set PL bits according to DMA_Priority value */
  /* Set the MEM2MEM bit according to DMA_M2M value */
  tmpreg |= DMA_InitStruct->DMA_DIR | DMA_InitStruct->DMA_Mode |
            DMA_InitStruct->DMA_PeripheralInc | DMA_InitStruct->DMA_MemoryInc |
            DMA_InitStruct->DMA_PeripheralDataSize | DMA_InitStruct->DMA_MemoryDataSize |
            DMA_InitStruct->DMA_Priority | DMA_InitStruct->DMA_M2M;

  /* Write to DMAy Channelx CCR */
  DMAy_Channelx->CCR = tmpreg;

/*--------------------------- DMAy Channelx CNDTR Configuration ---------------*/
  /* Write to DMAy Channelx CNDTR */
  DMAy_Channelx->CNDTR = DMA_InitStruct->DMA_BufferSize;

/*--------------------------- DMAy Channelx CPAR Configuration ----------------*/
  /* Write to DMAy Channelx CPAR */
  DMAy_Channelx->CPAR = DMA_InitStruct->DMA_PeripheralBaseAddr;

/*--------------------------- DMAy Channelx CMAR Configuration ----------------*/
  /* Write to DMAy Channelx CMAR */
  DMAy_Channelx->CMAR = DMA_InitStruct->DMA_MemoryBaseAddr;
}

void DMA_StructInit(DMA_InitTypeDef* DMA_InitStruct)
{
/*-------------- Reset DMA init structure parameters values ------------------*/
  /* Initialize the DMA_PeripheralBaseAddr member */
  DMA_InitStruct->DMA_PeripheralBaseAddr = 0;
  /* Initialize the DMA_MemoryBaseAddr member */
  DMA_InitStruct->DMA_MemoryBaseAddr = 0;
  /* Initialize the DMA_DIR member */
  DMA_InitStruct->DMA_DIR = DMA_DIR_PeripheralSRC;
  /* Initialize the DMA_BufferSize member */
  DMA_InitStruct->DMA_BufferSize = 0;
  /* Initialize the DMA_PeripheralInc member */
  DMA_InitStruct->DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  /* Initialize the DMA_MemoryInc member */
  DMA_InitStruct->DMA_MemoryInc = DMA_MemoryInc_Disable;
  /* Initialize the DMA_PeripheralDataSize member */
  DMA_InitStruct->DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  /* Initialize the DMA_MemoryDataSize member */
  DMA_InitStruct->DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  /* Initialize the DMA_Mode member */
  DMA_InitStruct->DMA_Mode = DMA_Mode_Normal;
  /* Initialize the DMA_Priority member */
  DMA_InitStruct->DMA_Priority = DMA_Priority_Low;
  /* Initialize the DMA_M2M member */
  DMA_InitStruct->DMA_M2M = DMA_M2M_Disable;
}

void DMA_Cmd(DMA_Channel_TypeDef* DMAy_Channelx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMAy Channelx */
    DMAy_Channelx->CCR |= DMA_CCR1_EN;
  }
  else
  {
    /* Disable the selected DMAy Channelx */
    DMAy_Channelx->CCR &= (uint16_t)(~DMA_CCR1_EN);
  }
}

void DMA_ITConfig(DMA_Channel_TypeDef* DMAy_Channelx, uint32_t DMA_IT, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
  assert_param(IS_DMA_CONFIG_IT(DMA_IT));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  if (NewState != DISABLE)
  {
    /* Enable the selected DMA interrupts */
    DMAy_Channelx->CCR |= DMA_IT;
  }
  else
  {
    /* Disable the selected DMA interrupts */
    DMAy_Channelx->CCR &= ~DMA_IT;
  }
}

void DMA_SetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx, uint16_t DataNumber)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
  
/*--------------------------- DMAy Channelx CNDTR Configuration ---------------*/
  /* Write to DMAy Channelx CNDTR */
  DMAy_Channelx->CNDTR = DataNumber;  
}

uint16_t DMA_GetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
  /* Return the number of remaining data units for DMAy Channelx */
  return ((uint16_t)(DMAy_Channelx->CNDTR));
}

FlagStatus DMA_GetFlagStatus(uint32_t DMAy_FLAG)
{
  FlagStatus bitstatus = RESET;
  uint32_t tmpreg = 0;
  
  /* Check the parameters */
  assert_param(IS_DMA_GET_FLAG(DMAy_FLAG));

  /* Calculate the used DMAy */
  if ((DMAy_FLAG & FLAG_Mask) != (uint32_t)RESET)
  {
    /* Get DMA2 ISR register value */
    tmpreg = DMA2->ISR ;
  }
  else
  {
    /* Get DMA1 ISR register value */
    tmpreg = DMA1->ISR ;
  }

  /* Check the status of the specified DMAy flag */
  if ((tmpreg & DMAy_FLAG) != (uint32_t)RESET)
  {
    /* DMAy_FLAG is set */
    bitstatus = SET;
  }
  else
  {
    /* DMAy_FLAG is reset */
    bitstatus = RESET;
  }
  
  /* Return the DMAy_FLAG status */
  return  bitstatus;
}

void DMA_ClearFlag(uint32_t DMAy_FLAG)
{
  /* Check the parameters */
  assert_param(IS_DMA_CLEAR_FLAG(DMAy_FLAG));

  /* Calculate the used DMAy */
  if ((DMAy_FLAG & FLAG_Mask) != (uint32_t)RESET)
  {
    /* Clear the selected DMAy flags */
    DMA2->IFCR = DMAy_FLAG;
  }
  else
  {
    /* Clear the selected DMAy flags */
    DMA1->IFCR = DMAy_FLAG;
  }
}

ITStatus DMA_GetITStatus(uint32_t DMAy_IT)
{
  ITStatus bitstatus = RESET;
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_DMA_GET_IT(DMAy_IT));

  /* Calculate the used DMA */
  if ((DMAy_IT & FLAG_Mask) != (uint32_t)RESET)
  {
    /* Get DMA2 ISR register value */
    tmpreg = DMA2->ISR;
  }
  else
  {
    /* Get DMA1 ISR register value */
    tmpreg = DMA1->ISR;
  }

  /* Check the status of the specified DMAy interrupt */
  if ((tmpreg & DMAy_IT) != (uint32_t)RESET)
  {
    /* DMAy_IT is set */
    bitstatus = SET;
  }
  else
  {
    /* DMAy_IT is reset */
    bitstatus = RESET;
  }
  /* Return the DMA_IT status */
  return  bitstatus;
}

void DMA_ClearITPendingBit(uint32_t DMAy_IT)
{
  /* Check the parameters */
  assert_param(IS_DMA_CLEAR_IT(DMAy_IT));

  /* Calculate the used DMAy */
  if ((DMAy_IT & FLAG_Mask) != (uint32_t)RESET)
  {
    /* Clear the selected DMAy interrupt pending bits */
    DMA2->IFCR = DMAy_IT;
  }
  else
  {
    /* Clear the selected DMAy interrupt pending bits */
    DMA1->IFCR = DMAy_IT;
  }
}

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/