/**
* @brief Initialize the DMA according to the specified
* parameters in the DMA_InitTypeDef and initialize the associated handle.
* @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Channel.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma)
{
uint32_t tmp = 0;
/* Check the DMA handle allocation */
if(hdma == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));
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));
if(hdma->Init.Direction != DMA_MEMORY_TO_MEMORY)
{
assert_param(IS_DMA_ALL_REQUEST(hdma->Init.Request));
}
if(hdma->State == HAL_DMA_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hdma->Lock = HAL_UNLOCKED;
}
/* Change DMA peripheral state */
hdma->State = HAL_DMA_STATE_BUSY;
/* Get the CR register value */
tmp = hdma->Instance->CCR;
/* Clear PL, MSIZE, PSIZE, MINC, PINC, CIRC, DIR bits */
tmp &= ((uint32_t)~(DMA_CCR_PL | DMA_CCR_MSIZE | DMA_CCR_PSIZE | \
DMA_CCR_MINC | DMA_CCR_PINC | DMA_CCR_CIRC | \
DMA_CCR_DIR));
/* Prepare the DMA Channel configuration */
tmp |= hdma->Init.Direction |
hdma->Init.PeriphInc | hdma->Init.MemInc |
hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment |
hdma->Init.Mode | hdma->Init.Priority;
/* Write to DMA Channel CR register */
hdma->Instance->CCR = tmp;
/* Set request selection */
if(hdma->Init.Direction != DMA_MEMORY_TO_MEMORY)
{
/* Write to DMA channel selection register */
if (hdma->Instance == DMA1_Channel1)
{
/*Reset request selection for DMA1 Channel1*/
DMA1_CSELR->CSELR &= ~DMA_CSELR_C1S;
/* Configure request selection for DMA1 Channel1 */
DMA1_CSELR->CSELR |= hdma->Init.Request;
}
else if (hdma->Instance == DMA1_Channel2)
{
/*Reset request selection for DMA1 Channel2*/
DMA1_CSELR->CSELR &= ~DMA_CSELR_C2S;
/* Configure request selection for DMA1 Channel2 */
DMA1_CSELR->CSELR |= (uint32_t)(hdma->Init.Request << 4);
}
else if (hdma->Instance == DMA1_Channel3)
{
/*Reset request selection for DMA1 Channel3*/
DMA1_CSELR->CSELR &= ~DMA_CSELR_C3S;
/* Configure request selection for DMA1 Channel3 */
DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 8);
}
else if (hdma->Instance == DMA1_Channel4)
{
/*Reset request selection for DMA1 Channel4*/
DMA1_CSELR->CSELR &= ~DMA_CSELR_C4S;
/* Configure request selection for DMA1 Channel4 */
DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 12);
}
else if (hdma->Instance == DMA1_Channel5)
{
/*Reset request selection for DMA1 Channel5*/
DMA1_CSELR->CSELR &= ~DMA_CSELR_C5S;
/* Configure request selection for DMA1 Channel5 */
DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 16);
}
else if (hdma->Instance == DMA1_Channel6)
{
/*Reset request selection for DMA1 Channel6*/
DMA1_CSELR->CSELR &= ~DMA_CSELR_C6S;
/* Configure request selection for DMA1 Channel6 */
DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 20);
}
else if (hdma->Instance == DMA1_Channel7)
{
/*Reset request selection for DMA1 Channel7*/
DMA1_CSELR->CSELR &= ~DMA_CSELR_C7S;
/* Configure request selection for DMA1 Channel7 */
DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 24);
}
else if (hdma->Instance == DMA2_Channel1)
{
/*Reset request selection for DMA2 Channel1*/
DMA2_CSELR->CSELR &= ~DMA_CSELR_C1S;
/* Configure request selection for DMA2 Channel1 */
DMA2_CSELR->CSELR |= hdma->Init.Request;
}
else if (hdma->Instance == DMA2_Channel2)
{
/*Reset request selection for DMA2 Channel2*/
DMA2_CSELR->CSELR &= ~DMA_CSELR_C2S;
/* Configure request selection for DMA2 Channel2 */
DMA2_CSELR->CSELR |= (uint32_t)(hdma->Init.Request << 4);
}
else if (hdma->Instance == DMA2_Channel3)
{
/*Reset request selection for DMA2 Channel3*/
DMA2_CSELR->CSELR &= ~DMA_CSELR_C3S;
/* Configure request selection for DMA2 Channel3 */
DMA2_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 8);
}
else if (hdma->Instance == DMA2_Channel4)
{
/*Reset request selection for DMA2 Channel4*/
DMA2_CSELR->CSELR &= ~DMA_CSELR_C4S;
/* Configure request selection for DMA2 Channel4 */
DMA2_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 12);
}
else if (hdma->Instance == DMA2_Channel5)
{
/*Reset request selection for DMA2 Channel5*/
DMA2_CSELR->CSELR &= ~DMA_CSELR_C5S;
/* Configure request selection for DMA2 Channel5 */
DMA2_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 16);
}
else if (hdma->Instance == DMA2_Channel6)
{
/*Reset request selection for DMA2 Channel6*/
DMA2_CSELR->CSELR &= ~DMA_CSELR_C6S;
/* Configure request selection for DMA2 Channel6 */
DMA2_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 20);
}
else if (hdma->Instance == DMA2_Channel7)
{
/*Reset request selection for DMA2 Channel7*/
DMA2_CSELR->CSELR &= ~DMA_CSELR_C7S;
/* Configure request selection for DMA2 Channel7 */
DMA2_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 24);
}
}
/* Initialize the error code */
hdma->ErrorCode = HAL_DMA_ERROR_NONE;
/* Initialize the DMA state*/
hdma->State = HAL_DMA_STATE_READY;
return HAL_OK;
}
/**
* @brief Initialize the DMA according to the specified
* parameters in the DMA_InitTypeDef and initialize the associated handle.
* @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Channel.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma)
{
uint32_t tmp = 0;
/* Check the DMA handle allocation */
if(hdma == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));
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));
if(hdma->Init.Direction != DMA_MEMORY_TO_MEMORY)
{
assert_param(IS_DMA_ALL_REQUEST(hdma->Init.Request));
}
/* calculation of the channel index */
if ((uint32_t)(hdma->Instance) < (uint32_t)(DMA2_Channel1))
{
/* DMA1 */
hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA1_Channel1) / ((uint32_t)DMA1_Channel2 - (uint32_t)DMA1_Channel1)) << 2;
hdma->DmaBaseAddress = DMA1;
}
else
{
/* DMA2 */
hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA2_Channel1) / ((uint32_t)DMA2_Channel2 - (uint32_t)DMA2_Channel1)) << 2;
hdma->DmaBaseAddress = DMA2;
}
/* Change DMA peripheral state */
hdma->State = HAL_DMA_STATE_BUSY;
/* Get the CR register value */
tmp = hdma->Instance->CCR;
/* Clear PL, MSIZE, PSIZE, MINC, PINC, CIRC, DIR bits */
tmp &= ((uint32_t)~(DMA_CCR_PL | DMA_CCR_MSIZE | DMA_CCR_PSIZE | \
DMA_CCR_MINC | DMA_CCR_PINC | DMA_CCR_CIRC | \
DMA_CCR_DIR));
/* Prepare the DMA Channel configuration */
tmp |= hdma->Init.Direction |
hdma->Init.PeriphInc | hdma->Init.MemInc |
hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment |
hdma->Init.Mode | hdma->Init.Priority;
/* Write to DMA Channel CR register */
hdma->Instance->CCR = tmp;
/* Set request selection */
if(hdma->Init.Direction != DMA_MEMORY_TO_MEMORY)
{
/* Write to DMA channel selection register */
if (DMA1 == hdma->DmaBaseAddress)
{
/* Reset request selection for DMA1 Channelx */
DMA1_CSELR->CSELR &= ~(DMA_CSELR_C1S << hdma->ChannelIndex);
/* Configure request selection for DMA1 Channelx */
DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << (hdma->ChannelIndex));
}
else /* DMA2 */
{
/* Reset request selection for DMA2 Channelx */
DMA2_CSELR->CSELR &= ~(DMA_CSELR_C1S << hdma->ChannelIndex);
/* Configure request selection for DMA2 Channelx */
DMA2_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << (hdma->ChannelIndex));
}
}
/* Clean callbacks */
hdma->XferCpltCallback = NULL;
hdma->XferHalfCpltCallback = NULL;
hdma->XferErrorCallback = NULL;
hdma->XferAbortCallback = NULL;
/* Initialise the error code */
hdma->ErrorCode = HAL_DMA_ERROR_NONE;
/* Initialize the DMA state*/
hdma->State = HAL_DMA_STATE_READY;
/* Allocate lock resource and initialize it */
hdma->Lock = HAL_UNLOCKED;
return HAL_OK;
}
