/**
* @brief Enables DAC and starts conversion of channel using DMA.
* @param hdac: pointer to a DAC_HandleTypeDef structure that contains
* the configuration information for the specified DAC.
* @param channel: The selected DAC channel.
* This parameter can be one of the following values:
* @arg DAC_CHANNEL_1: DAC Channel1 selected
* @param pData: The destination peripheral Buffer address.
* @param Length: The length of data to be transferred from memory to DAC peripheral
* @param alignment: Specifies the data alignment for DAC channel.
* This parameter can be one of the following values:
* @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
* @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
* @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef* hdac, uint32_t channel, uint32_t* pData, uint32_t Length, uint32_t alignment)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_DAC_CHANNEL(channel));
assert_param(IS_DAC_ALIGN(alignment));
/* Process locked */
__HAL_LOCK(hdac);
/* Change DAC state */
hdac->State = HAL_DAC_STATE_BUSY;
/* Set the DMA transfer complete callback for channel1 */
hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;
/* Set the DMA half transfer complete callback for channel1 */
hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;
/* Set the DMA error callback for channel1 */
hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;
/* Enable the selected DAC channel1 DMA request */
hdac->Instance->CR |= DAC_CR_DMAEN1;
/* Case of use of channel 1 */
switch(alignment)
{
case DAC_ALIGN_12B_R:
/* Get DHR12R1 address */
tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
break;
case DAC_ALIGN_12B_L:
/* Get DHR12L1 address */
tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
break;
case DAC_ALIGN_8B_R:
/* Get DHR8R1 address */
tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
break;
default:
break;
}
/* Enable the DMA Channel */
/* Enable the DAC DMA underrun interrupt */
__HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);
HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
/* Enable the Peripharal */
__HAL_DAC_ENABLE(hdac, channel);
/* Process Unlocked */
__HAL_UNLOCK(hdac);
/* Return function status */
return HAL_OK;
}
/**
* @brief Enables DAC and starts conversion of channel using DMA.
* @param hdac: pointer to a DAC_HandleTypeDef structure that contains
* the configuration information for the specified DAC.
* @param Channel: The selected DAC channel.
* This parameter can be one of the following values:
* @arg DAC_CHANNEL_1: DAC Channel1 selected
* @arg DAC_CHANNEL_2: DAC Channel2 selected
* @param pData: The destination peripheral Buffer address.
* @param Length: The length of data to be transferred from memory to DAC peripheral
* @param Alignment: Specifies the data alignment for DAC channel.
* This parameter can be one of the following values:
* @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
* @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
* @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t* pData, uint32_t Length, uint32_t Alignment)
{
uint32_t tmpreg = 0U;
/* Check the parameters */
assert_param(IS_DAC_CHANNEL(Channel));
assert_param(IS_DAC_ALIGN(Alignment));
/* Process locked */
__HAL_LOCK(hdac);
/* Change DAC state */
hdac->State = HAL_DAC_STATE_BUSY;
if(Channel == DAC_CHANNEL_1)
{
/* Set the DMA transfer complete callback for channel1 */
hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;
/* Set the DMA half transfer complete callback for channel1 */
hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;
/* Set the DMA error callback for channel1 */
hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;
/* Enable the selected DAC channel1 DMA request */
SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
/* Case of use of channel 1 */
switch(Alignment)
{
case DAC_ALIGN_12B_R:
/* Get DHR12R1 address */
tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
break;
case DAC_ALIGN_12B_L:
/* Get DHR12L1 address */
tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
break;
case DAC_ALIGN_8B_R:
/* Get DHR8R1 address */
tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
break;
default:
break;
}
UNUSED(tmpreg); /* avoid warning on tmpreg affectation with stupid compiler */
}
else
{
/* Set the DMA transfer complete callback for channel2 */
hdac->DMA_Handle2->XferCpltCallback = DAC_DMAConvCpltCh2;
/* Set the DMA half transfer complete callback for channel2 */
hdac->DMA_Handle2->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh2;
/* Set the DMA error callback for channel2 */
hdac->DMA_Handle2->XferErrorCallback = DAC_DMAErrorCh2;
/* Enable the selected DAC channel2 DMA request */
SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
/* Case of use of channel 2 */
switch(Alignment)
{
case DAC_ALIGN_12B_R:
/* Get DHR12R2 address */
tmpreg = (uint32_t)&hdac->Instance->DHR12R2;
break;
case DAC_ALIGN_12B_L:
/* Get DHR12L2 address */
tmpreg = (uint32_t)&hdac->Instance->DHR12L2;
break;
case DAC_ALIGN_8B_R:
/* Get DHR8R2 address */
tmpreg = (uint32_t)&hdac->Instance->DHR8R2;
break;
default:
break;
}
}
/* Enable the DMA Stream */
if(Channel == DAC_CHANNEL_1)
{
/* Enable the DAC DMA underrun interrupt */
__HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);
/* Enable the DMA Stream */
HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
}
else
{
/* Enable the DAC DMA underrun interrupt */
__HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR2);
/* Enable the DMA Stream */
HAL_DMA_Start_IT(hdac->DMA_Handle2, (uint32_t)pData, tmpreg, Length);
}
/* Enable the Peripharal */
__HAL_DAC_ENABLE(hdac, Channel);
/* Process Unlocked */
__HAL_UNLOCK(hdac);
/* Return function status */
return HAL_OK;
}
