PDM SDMA Driver

Data Structures
struct	_pdm_sdma_handle
	PDM DMA transfer handle, users should not touch the content of the handle. More...

Driver version
typedef struct _pdm_sdma_handle	pdm_sdma_handle_t
typedef void(*	pdm_sdma_callback_t) (PDM_Type *base, pdm_sdma_handle_t *handle, status_t status, void *userData)
	PDM eDMA transfer callback function for finish and error.
#define	FSL_PDM_SDMA_DRIVER_VERSION   (MAKE_VERSION(2, 7, 0))

eDMA Transactional
void	PDM_TransferCreateHandleSDMA (PDM_Type *base, pdm_sdma_handle_t *handle, pdm_sdma_callback_t callback, void *userData, sdma_handle_t *dmaHandle, uint32_t eventSource)
	Initializes the PDM eDMA handle. More...
status_t	PDM_TransferReceiveSDMA (PDM_Type *base, pdm_sdma_handle_t *handle, pdm_transfer_t *xfer)
	Performs a non-blocking PDM receive using eDMA. More...
void	PDM_TransferAbortReceiveSDMA (PDM_Type *base, pdm_sdma_handle_t *handle)
	Aborts a PDM receive using eDMA. More...
void	PDM_SetChannelConfigSDMA (PDM_Type *base, pdm_sdma_handle_t *handle, uint32_t channel, const pdm_channel_config_t *config)
	PDM channel configurations. More...
void	PDM_TransferTerminateReceiveSDMA (PDM_Type *base, pdm_sdma_handle_t *handle)
	Terminate all the PDM sdma receive transfer. More...

Detailed Description

Macro Definition Documentation

FSL_PDM_SDMA_DRIVER_VERSION

#define FSL_PDM_SDMA_DRIVER_VERSION   (MAKE_VERSION(2, 7, 0))

Version 2.7.0

Function Documentation

PDM_SetChannelConfigSDMA()

void PDM_SetChannelConfigSDMA	(	PDM_Type *	base,
		pdm_sdma_handle_t *	handle,
		uint32_t	channel,
		const pdm_channel_config_t *	config
	)

PDM channel configurations.

Parameters

base	PDM base pointer.
handle	PDM eDMA handle pointer.
channel	channel number.
config	channel configurations.

PDM_TransferAbortReceiveSDMA()

void PDM_TransferAbortReceiveSDMA	(	PDM_Type *	base,
		pdm_sdma_handle_t *	handle
	)

Aborts a PDM receive using eDMA.

Parameters

base	PDM base pointer
handle	PDM eDMA handle pointer.

PDM_TransferCreateHandleSDMA()

void PDM_TransferCreateHandleSDMA	(	PDM_Type *	base,
		pdm_sdma_handle_t *	handle,
		pdm_sdma_callback_t	callback,
		void *	userData,
		sdma_handle_t *	dmaHandle,
		uint32_t	eventSource
	)

Initializes the PDM eDMA handle.

This function initializes the PDM DMA handle, which can be used for other PDM master transactional APIs. Usually, for a specified PDM instance, call this API once to get the initialized handle.

Parameters

base	PDM base pointer.
handle	PDM eDMA handle pointer.
callback	Pointer to user callback function.
userData	User parameter passed to the callback function.
dmaHandle	eDMA handle pointer, this handle shall be static allocated by users.
eventSource	PDM event source number.

PDM_TransferReceiveSDMA()

status_t PDM_TransferReceiveSDMA	(	PDM_Type *	base,
		pdm_sdma_handle_t *	handle,
		pdm_transfer_t *	xfer
	)

Performs a non-blocking PDM receive using eDMA.

Note

This interface returns immediately after the transfer initiates. Call the PDM_GetReceiveRemainingBytes to poll the transfer status and check whether the PDM transfer is finished.

Parameters

base	PDM base pointer
handle	PDM eDMA handle pointer.
xfer	Pointer to DMA transfer structure.

Return values

kStatus_Success	Start a PDM eDMA receive successfully.
kStatus_InvalidArgument	The input argument is invalid.
kStatus_RxBusy	PDM is busy receiving data.

PDM_TransferTerminateReceiveSDMA()

void PDM_TransferTerminateReceiveSDMA	(	PDM_Type *	base,
		pdm_sdma_handle_t *	handle
	)

Terminate all the PDM sdma receive transfer.

Parameters

base	PDM base pointer.
handle	PDM SDMA handle pointer.