/**
* @brief Initializes the DMA according to the specified
* parameters in the DMA_InitTypeDef and create the associated handle.
* @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Stream.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma)
{
uint32_t tmp = 0;
/* Check the DMA peripheral state */
if(hdma == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_DMA_STREAM_ALL_INSTANCE(hdma->Instance));
assert_param(IS_DMA_CHANNEL(hdma->Init.Channel));
assert_param(IS_DMA_DIRECTION(hdma->Init.Direction));
assert_param(IS_DMA_PERIPHERAL_INC_STATE(hdma->Init.PeriphInc));
assert_param(IS_DMA_MEMORY_INC_STATE(hdma->Init.MemInc));
assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(hdma->Init.PeriphDataAlignment));
assert_param(IS_DMA_MEMORY_DATA_SIZE(hdma->Init.MemDataAlignment));
assert_param(IS_DMA_MODE(hdma->Init.Mode));
assert_param(IS_DMA_PRIORITY(hdma->Init.Priority));
assert_param(IS_DMA_FIFO_MODE_STATE(hdma->Init.FIFOMode));
/* Check the memory burst, peripheral burst and FIFO threshold parameters only
when FIFO mode is enabled */
if(hdma->Init.FIFOMode != DMA_FIFOMODE_DISABLE)
{
assert_param(IS_DMA_FIFO_THRESHOLD(hdma->Init.FIFOThreshold));
assert_param(IS_DMA_MEMORY_BURST(hdma->Init.MemBurst));
assert_param(IS_DMA_PERIPHERAL_BURST(hdma->Init.PeriphBurst));
}
/* Change DMA peripheral state */
hdma->State = HAL_DMA_STATE_BUSY;
/* Get the CR register value */
tmp = hdma->Instance->CR;
/* Clear CHSEL, MBURST, PBURST, PL, MSIZE, PSIZE, MINC, PINC, CIRC, DIR and CT bits */
tmp &= ((uint32_t)~(DMA_SxCR_CHSEL | DMA_SxCR_MBURST | DMA_SxCR_PBURST | \
DMA_SxCR_PL | DMA_SxCR_MSIZE | DMA_SxCR_PSIZE | \
DMA_SxCR_MINC | DMA_SxCR_PINC | DMA_SxCR_CIRC | \
DMA_SxCR_DIR | DMA_SxCR_CT ));
/* Prepare the DMA Stream configuration */
tmp |= hdma->Init.Channel | hdma->Init.Direction |
hdma->Init.PeriphInc | hdma->Init.MemInc |
hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment |
hdma->Init.Mode | hdma->Init.Priority;
/* the Memory burst and peripheral burst are not used when the FIFO is disabled */
if(hdma->Init.FIFOMode == DMA_FIFOMODE_ENABLE)
{
/* Get memory burst and peripheral burst */
tmp |= hdma->Init.MemBurst | hdma->Init.PeriphBurst;
}
/* Write to DMA Stream CR register */
hdma->Instance->CR = tmp;
/* Get the FCR register value */
tmp = hdma->Instance->FCR;
/* Clear Direct mode and FIFO threshold bits */
tmp &= (uint32_t)~(DMA_SxFCR_DMDIS | DMA_SxFCR_FTH);
/* Prepare the DMA Stream FIFO configuration */
tmp |= hdma->Init.FIFOMode;
/* the FIFO threshold is not used when the FIFO mode is disabled */
if(hdma->Init.FIFOMode == DMA_FIFOMODE_ENABLE)
{
/* Get the FIFO threshold */
tmp |= hdma->Init.FIFOThreshold;
}
/* Write to DMA Stream FCR */
hdma->Instance->FCR = tmp;
/* Initialise the error code */
hdma->ErrorCode = HAL_DMA_ERROR_NONE;
/* Initialize the DMA state */
hdma->State = HAL_DMA_STATE_READY;
return HAL_OK;
}
void DMA_Init(DMA_Stream_TypeDef* DMAy_Streamx, DMA_InitTypeDef* DMA_InitStruct)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_DMA_ALL_PERIPH(DMAy_Streamx));
assert_param(IS_DMA_CHANNEL(DMA_InitStruct->DMA_Channel));
assert_param(IS_DMA_DIRECTION(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_FIFO_MODE_STATE(DMA_InitStruct->DMA_FIFOMode));
assert_param(IS_DMA_FIFO_THRESHOLD(DMA_InitStruct->DMA_FIFOThreshold));
assert_param(IS_DMA_MEMORY_BURST(DMA_InitStruct->DMA_MemoryBurst));
assert_param(IS_DMA_PERIPHERAL_BURST(DMA_InitStruct->DMA_PeripheralBurst));
/*------------------------- DMAy Streamx CR Configuration ------------------*/
/* Get the DMAy_Streamx CR value */
tmpreg = DMAy_Streamx->CR;
/* Clear CHSEL, MBURST, PBURST, PL, MSIZE, PSIZE, MINC, PINC, CIRC and DIR bits */
tmpreg &= ((uint32_t)~(DMA_SxCR_CHSEL | DMA_SxCR_MBURST | DMA_SxCR_PBURST | \
DMA_SxCR_PL | DMA_SxCR_MSIZE | DMA_SxCR_PSIZE | \
DMA_SxCR_MINC | DMA_SxCR_PINC | DMA_SxCR_CIRC | \
DMA_SxCR_DIR));
/* Configure DMAy Streamx: */
/* Set CHSEL bits according to DMA_CHSEL value */
/* Set DIR bits according to DMA_DIR 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 CIRC bit according to DMA_Mode value */
/* Set PL bits according to DMA_Priority value */
/* Set MBURST bits according to DMA_MemoryBurst value */
/* Set PBURST bits according to DMA_PeripheralBurst value */
tmpreg |= DMA_InitStruct->DMA_Channel | DMA_InitStruct->DMA_DIR |
DMA_InitStruct->DMA_PeripheralInc | DMA_InitStruct->DMA_MemoryInc |
DMA_InitStruct->DMA_PeripheralDataSize | DMA_InitStruct->DMA_MemoryDataSize |
DMA_InitStruct->DMA_Mode | DMA_InitStruct->DMA_Priority |
DMA_InitStruct->DMA_MemoryBurst | DMA_InitStruct->DMA_PeripheralBurst;
/* Write to DMAy Streamx CR register */
DMAy_Streamx->CR = tmpreg;
/*------------------------- DMAy Streamx FCR Configuration -----------------*/
/* Get the DMAy_Streamx FCR value */
tmpreg = DMAy_Streamx->FCR;
/* Clear DMDIS and FTH bits */
tmpreg &= (uint32_t)~(DMA_SxFCR_DMDIS | DMA_SxFCR_FTH);
/* Configure DMAy Streamx FIFO:
Set DMDIS bits according to DMA_FIFOMode value
Set FTH bits according to DMA_FIFOThreshold value */
tmpreg |= DMA_InitStruct->DMA_FIFOMode | DMA_InitStruct->DMA_FIFOThreshold;
/* Write to DMAy Streamx CR */
DMAy_Streamx->FCR = tmpreg;
/*------------------------- DMAy Streamx NDTR Configuration ----------------*/
/* Write to DMAy Streamx NDTR register */
DMAy_Streamx->NDTR = DMA_InitStruct->DMA_BufferSize;
/*------------------------- DMAy Streamx PAR Configuration -----------------*/
/* Write to DMAy Streamx PAR */
DMAy_Streamx->PAR = DMA_InitStruct->DMA_PeripheralBaseAddr;
/*------------------------- DMAy Streamx M0AR Configuration ----------------*/
/* Write to DMAy Streamx M0AR */
DMAy_Streamx->M0AR = DMA_InitStruct->DMA_Memory0BaseAddr;
}
/**
* @brief Initialize the DMA according to the specified
* parameters in the DMA_InitTypeDef and create the associated handle.
* @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Stream.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma)
{
uint32_t tmp = 0U;
uint32_t tickstart = HAL_GetTick();
DMA_Base_Registers *regs;
/* Check the DMA peripheral state */
if(hdma == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_DMA_STREAM_ALL_INSTANCE(hdma->Instance));
assert_param(IS_DMA_CHANNEL(hdma->Init.Channel));
assert_param(IS_DMA_DIRECTION(hdma->Init.Direction));
assert_param(IS_DMA_PERIPHERAL_INC_STATE(hdma->Init.PeriphInc));
assert_param(IS_DMA_MEMORY_INC_STATE(hdma->Init.MemInc));
assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(hdma->Init.PeriphDataAlignment));
assert_param(IS_DMA_MEMORY_DATA_SIZE(hdma->Init.MemDataAlignment));
assert_param(IS_DMA_MODE(hdma->Init.Mode));
assert_param(IS_DMA_PRIORITY(hdma->Init.Priority));
assert_param(IS_DMA_FIFO_MODE_STATE(hdma->Init.FIFOMode));
/* Check the memory burst, peripheral burst and FIFO threshold parameters only
when FIFO mode is enabled */
if(hdma->Init.FIFOMode != DMA_FIFOMODE_DISABLE)
{
assert_param(IS_DMA_FIFO_THRESHOLD(hdma->Init.FIFOThreshold));
assert_param(IS_DMA_MEMORY_BURST(hdma->Init.MemBurst));
assert_param(IS_DMA_PERIPHERAL_BURST(hdma->Init.PeriphBurst));
}
/* Allocate lock resource */
__HAL_UNLOCK(hdma);
/* Change DMA peripheral state */
hdma->State = HAL_DMA_STATE_BUSY;
/* Disable the peripheral */
__HAL_DMA_DISABLE(hdma);
/* Check if the DMA Stream is effectively disabled */
while((hdma->Instance->CR & DMA_SxCR_EN) != RESET)
{
/* Check for the Timeout */
if((HAL_GetTick() - tickstart ) > HAL_TIMEOUT_DMA_ABORT)
{
/* Update error code */
hdma->ErrorCode = HAL_DMA_ERROR_TIMEOUT;
/* Change the DMA state */
hdma->State = HAL_DMA_STATE_TIMEOUT;
return HAL_TIMEOUT;
}
}
/* Get the CR register value */
tmp = hdma->Instance->CR;
/* Clear CHSEL, MBURST, PBURST, PL, MSIZE, PSIZE, MINC, PINC, CIRC, DIR, CT and DBM bits */
tmp &= ((uint32_t)~(DMA_SxCR_CHSEL | DMA_SxCR_MBURST | DMA_SxCR_PBURST | \
DMA_SxCR_PL | DMA_SxCR_MSIZE | DMA_SxCR_PSIZE | \
DMA_SxCR_MINC | DMA_SxCR_PINC | DMA_SxCR_CIRC | \
DMA_SxCR_DIR | DMA_SxCR_CT | DMA_SxCR_DBM));
/* Prepare the DMA Stream configuration */
tmp |= hdma->Init.Channel | hdma->Init.Direction |
hdma->Init.PeriphInc | hdma->Init.MemInc |
hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment |
hdma->Init.Mode | hdma->Init.Priority;
/* the Memory burst and peripheral burst are not used when the FIFO is disabled */
if(hdma->Init.FIFOMode == DMA_FIFOMODE_ENABLE)
{
/* Get memory burst and peripheral burst */
tmp |= hdma->Init.MemBurst | hdma->Init.PeriphBurst;
}
/* Write to DMA Stream CR register */
hdma->Instance->CR = tmp;
/* Get the FCR register value */
tmp = hdma->Instance->FCR;
/* Clear Direct mode and FIFO threshold bits */
tmp &= (uint32_t)~(DMA_SxFCR_DMDIS | DMA_SxFCR_FTH);
/* Prepare the DMA Stream FIFO configuration */
tmp |= hdma->Init.FIFOMode;
/* the FIFO threshold is not used when the FIFO mode is disabled */
if(hdma->Init.FIFOMode == DMA_FIFOMODE_ENABLE)
{
/* Get the FIFO threshold */
tmp |= hdma->Init.FIFOThreshold;
if (DMA_CheckFifoParam(hdma) != HAL_OK)
{
/* Update error code */
hdma->ErrorCode = HAL_DMA_ERROR_PARAM;
/* Change the DMA state */
hdma->State = HAL_DMA_STATE_READY;
return HAL_ERROR;
}
}
/* Write to DMA Stream FCR */
hdma->Instance->FCR = tmp;
/* Initialize StreamBaseAddress and StreamIndex parameters to be used to calculate
DMA steam Base Address needed by HAL_DMA_IRQHandler() and HAL_DMA_PollForTransfer() */
regs = (DMA_Base_Registers *)DMA_CalcBaseAndBitshift(hdma);
/* Clear all interrupt flags */
regs->IFCR = 0x3FU << hdma->StreamIndex;
/* Initialize the error code */
hdma->ErrorCode = HAL_DMA_ERROR_NONE;
/* Initialize the DMA state */
hdma->State = HAL_DMA_STATE_READY;
return HAL_OK;
}