/**
* @brief Resumes the Camera capture.
* @param None
* @retval None
*/
void BSP_CAMERA_Resume(void)
{
/* Enable the DCMI */
__HAL_DCMI_ENABLE(&hdcmi_eval);
/* Enable the DMA */
__HAL_DMA_ENABLE(hdcmi_eval.DMA_Handle);
}
/**
* @brief Initializes the DCMI according to the specified
* parameters in the DCMI_InitTypeDef and create the associated handle.
* @param hdcmi: pointer to a DCMI_HandleTypeDef structure that contains
* the configuration information for DCMI.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DCMI_Init(DCMI_HandleTypeDef *hdcmi)
{
/* Check the DCMI peripheral state */
if(hdcmi == NULL)
{
return HAL_ERROR;
}
/* Check function parameters */
assert_param(IS_DCMI_ALL_INSTANCE(hdcmi->Instance));
assert_param(IS_DCMI_PCKPOLARITY(hdcmi->Init.PCKPolarity));
assert_param(IS_DCMI_VSPOLARITY(hdcmi->Init.VSPolarity));
assert_param(IS_DCMI_HSPOLARITY(hdcmi->Init.HSPolarity));
assert_param(IS_DCMI_SYNCHRO(hdcmi->Init.SynchroMode));
assert_param(IS_DCMI_CAPTURE_RATE(hdcmi->Init.CaptureRate));
assert_param(IS_DCMI_EXTENDED_DATA(hdcmi->Init.ExtendedDataMode));
assert_param(IS_DCMI_MODE_JPEG(hdcmi->Init.JPEGMode));
if(hdcmi->State == HAL_DCMI_STATE_RESET)
{
/* Init the low level hardware */
HAL_DCMI_MspInit(hdcmi);
}
/* Change the DCMI state */
hdcmi->State = HAL_DCMI_STATE_BUSY;
/* Configures the HS, VS, DE and PC polarity */
hdcmi->Instance->CR &= ~(DCMI_CR_PCKPOL | DCMI_CR_HSPOL | DCMI_CR_VSPOL | DCMI_CR_EDM_0 |
DCMI_CR_EDM_1 | DCMI_CR_FCRC_0 | DCMI_CR_FCRC_1 | DCMI_CR_JPEG |
DCMI_CR_ESS);
hdcmi->Instance->CR |= (uint32_t)(hdcmi->Init.SynchroMode | hdcmi->Init.CaptureRate | \
hdcmi->Init.VSPolarity | hdcmi->Init.HSPolarity | \
hdcmi->Init.PCKPolarity | hdcmi->Init.ExtendedDataMode | \
hdcmi->Init.JPEGMode);
if(hdcmi->Init.SynchroMode == DCMI_SYNCHRO_EMBEDDED)
{
DCMI->ESCR = (((uint32_t)hdcmi->Init.SyncroCode.FrameStartCode) |
((uint32_t)hdcmi->Init.SyncroCode.LineStartCode << 8)|
((uint32_t)hdcmi->Init.SyncroCode.LineEndCode << 16) |
((uint32_t)hdcmi->Init.SyncroCode.FrameEndCode << 24));
}
/* Enable the Line interrupt */
__HAL_DCMI_ENABLE_IT(hdcmi, DCMI_IT_LINE);
/* Enable the VSYNC interrupt */
__HAL_DCMI_ENABLE_IT(hdcmi, DCMI_IT_VSYNC);
/* Enable the Frame capture complete interrupt */
__HAL_DCMI_ENABLE_IT(hdcmi, DCMI_IT_FRAME);
/* Enable the Synchronization error interrupt */
__HAL_DCMI_ENABLE_IT(hdcmi, DCMI_IT_ERR);
/* Enable the Overflow interrupt */
__HAL_DCMI_ENABLE_IT(hdcmi, DCMI_IT_OVF);
/* Enable DCMI by setting DCMIEN bit */
__HAL_DCMI_ENABLE(hdcmi);
/* Update error code */
hdcmi->ErrorCode = HAL_DCMI_ERROR_NONE;
/* Initialize the DCMI state*/
hdcmi->State = HAL_DCMI_STATE_READY;
return HAL_OK;
}
/**
* @brief Enables DCMI DMA request and enables DCMI capture
* @param hdcmi: pointer to a DCMI_HandleTypeDef structure that contains
* the configuration information for DCMI.
* @param DCMI_Mode: DCMI capture mode snapshot or continuous grab.
* @param pData: The destination memory Buffer address (LCD Frame buffer).
* @param Length: The length of capture to be transferred.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DCMI_Start_DMA(DCMI_HandleTypeDef* hdcmi, uint32_t DCMI_Mode, uint32_t pData, uint32_t Length)
{
/* Initialize the second memory address */
uint32_t SecondMemAddress = 0U;
/* Check function parameters */
assert_param(IS_DCMI_CAPTURE_MODE(DCMI_Mode));
/* Process Locked */
__HAL_LOCK(hdcmi);
/* Lock the DCMI peripheral state */
hdcmi->State = HAL_DCMI_STATE_BUSY;
/* Enable DCMI by setting DCMIEN bit */
__HAL_DCMI_ENABLE(hdcmi);
/* Configure the DCMI Mode */
hdcmi->Instance->CR &= ~(DCMI_CR_CM);
hdcmi->Instance->CR |= (uint32_t)(DCMI_Mode);
/* Set the DMA memory0 conversion complete callback */
hdcmi->DMA_Handle->XferCpltCallback = DCMI_DMAXferCplt;
/* Set the DMA error callback */
hdcmi->DMA_Handle->XferErrorCallback = DCMI_DMAError;
/* Set the dma abort callback */
hdcmi->DMA_Handle->XferAbortCallback = NULL;
/* Reset transfer counters value */
hdcmi->XferCount = 0;
hdcmi->XferTransferNumber = 0;
if(Length <= 0xFFFFU)
{
/* Enable the DMA Stream */
HAL_DMA_Start_IT(hdcmi->DMA_Handle, (uint32_t)&hdcmi->Instance->DR, (uint32_t)pData, Length);
}
else /* DCMI_DOUBLE_BUFFER Mode */
{
/* Set the DMA memory1 conversion complete callback */
hdcmi->DMA_Handle->XferM1CpltCallback = DCMI_DMAXferCplt;
/* Initialize transfer parameters */
hdcmi->XferCount = 1U;
hdcmi->XferSize = Length;
hdcmi->pBuffPtr = pData;
/* Get the number of buffer */
while(hdcmi->XferSize > 0xFFFFU)
{
hdcmi->XferSize = (hdcmi->XferSize/2U);
hdcmi->XferCount = hdcmi->XferCount*2U;
}
/* Update DCMI counter and transfer number*/
hdcmi->XferCount = (hdcmi->XferCount - 2U);
hdcmi->XferTransferNumber = hdcmi->XferCount;
/* Update second memory address */
SecondMemAddress = (uint32_t)(pData + (4U*hdcmi->XferSize));
/* Start DMA multi buffer transfer */
HAL_DMAEx_MultiBufferStart_IT(hdcmi->DMA_Handle, (uint32_t)&hdcmi->Instance->DR, (uint32_t)pData, SecondMemAddress, hdcmi->XferSize);
}
/* Enable Capture */
hdcmi->Instance->CR |= DCMI_CR_CAPTURE;
/* Release Lock */
__HAL_UNLOCK(hdcmi);
/* Return function status */
return HAL_OK;
}
