Data Structures
struct	_lpuart_edma_handle
	LPUART eDMA handle. More...

Variables
lpuart_edma_transfer_callback_t	_lpuart_edma_handle::callback

void *	_lpuart_edma_handle::userData

size_t	_lpuart_edma_handle::rxDataSizeAll

size_t	_lpuart_edma_handle::txDataSizeAll

edma_handle_t *	_lpuart_edma_handle::txEdmaHandle

edma_handle_t *	_lpuart_edma_handle::rxEdmaHandle

uint8_t	_lpuart_edma_handle::nbytes

volatile uint8_t	_lpuart_edma_handle::txState

volatile uint8_t	_lpuart_edma_handle::rxState

Driver version
typedef struct _lpuart_edma_handle	lpuart_edma_handle_t

typedef void(*	lpuart_edma_transfer_callback_t) (LPUART_Type base, lpuart_edma_handle_t handle, status_t status, void *userData)
	LPUART transfer callback function.

#define	FSL_LPUART_EDMA_DRIVER_VERSION (MAKE_VERSION(2, 6, 0))
	LPUART EDMA driver version.

eDMA transactional
void	LPUART_TransferCreateHandleEDMA (LPUART_Type base, lpuart_edma_handle_t handle, lpuart_edma_transfer_callback_t callback, void userData, edma_handle_t txEdmaHandle, edma_handle_t *rxEdmaHandle)
	Initializes the LPUART handle which is used in transactional functions.

status_t	LPUART_SendEDMA (LPUART_Type base, lpuart_edma_handle_t handle, lpuart_transfer_t *xfer)
	Sends data using eDMA.

status_t	LPUART_ReceiveEDMA (LPUART_Type base, lpuart_edma_handle_t handle, lpuart_transfer_t *xfer)
	Receives data using eDMA.

void	LPUART_TransferAbortSendEDMA (LPUART_Type base, lpuart_edma_handle_t handle)
	Aborts the sent data using eDMA.

void	LPUART_TransferAbortReceiveEDMA (LPUART_Type base, lpuart_edma_handle_t handle)
	Aborts the received data using eDMA.

status_t	LPUART_TransferGetSendCountEDMA (LPUART_Type base, lpuart_edma_handle_t handle, uint32_t *count)
	Gets the number of bytes written to the LPUART TX register.

status_t	LPUART_TransferGetReceiveCountEDMA (LPUART_Type base, lpuart_edma_handle_t handle, uint32_t *count)
	Gets the number of received bytes.

void	LPUART_TransferEdmaHandleIRQ (LPUART_Type base, void lpuartEdmaHandle)
	LPUART eDMA IRQ handle function.

Detailed Description

Function Documentation

◆ LPUART_ReceiveEDMA()

status_t LPUART_ReceiveEDMA	(	LPUART_Type *	base,
		lpuart_edma_handle_t *	handle,
		lpuart_transfer_t *	xfer
	)

Receives data using eDMA.

This function receives data using eDMA. This is non-blocking function, which returns right away. When all data is received, the receive callback function is called.

Parameters

base	LPUART peripheral base address.
handle	Pointer to lpuart_edma_handle_t structure.
xfer	LPUART eDMA transfer structure, see lpuart_transfer_t.

Return values

kStatus_Success	if succeed, others fail.
kStatus_LPUART_RxBusy	Previous transfer ongoing.
kStatus_InvalidArgument	Invalid argument.

brief Receives data using eDMA.

This function receives data using eDMA. This is non-blocking function, which returns right away. When all data is received, the receive callback function is called.

param base LPUART peripheral base address. param handle Pointer to lpuart_edma_handle_t structure. param xfer LPUART eDMA transfer structure, see lpuart_transfer_t. retval kStatus_Success if succeed, others fail. retval kStatus_LPUART_RxBusy Previous transfer ongoing. retval kStatus_InvalidArgument Invalid argument.

◆ LPUART_SendEDMA()

status_t LPUART_SendEDMA	(	LPUART_Type *	base,
		lpuart_edma_handle_t *	handle,
		lpuart_transfer_t *	xfer
	)

Sends data using eDMA.

This function sends data using eDMA. This is a non-blocking function, which returns right away. When all data is sent, the send callback function is called.

Parameters

base	LPUART peripheral base address.
handle	LPUART handle pointer.
xfer	LPUART eDMA transfer structure. See lpuart_transfer_t.

Return values

kStatus_Success	if succeed, others failed.
kStatus_LPUART_TxBusy	Previous transfer on going.
kStatus_InvalidArgument	Invalid argument.

brief Sends data using eDMA.

This function sends data using eDMA. This is a non-blocking function, which returns right away. When all data is sent, the send callback function is called.

param base LPUART peripheral base address. param handle LPUART handle pointer. param xfer LPUART eDMA transfer structure. See lpuart_transfer_t. retval kStatus_Success if succeed, others failed. retval kStatus_LPUART_TxBusy Previous transfer on going. retval kStatus_InvalidArgument Invalid argument.

◆ LPUART_TransferAbortReceiveEDMA()

void LPUART_TransferAbortReceiveEDMA	(	LPUART_Type *	base,
		lpuart_edma_handle_t *	handle
	)

Aborts the received data using eDMA.

This function aborts the received data using eDMA.

Parameters

base	LPUART peripheral base address.
handle	Pointer to lpuart_edma_handle_t structure.

brief Aborts the received data using eDMA.

This function aborts the received data using eDMA.

param base LPUART peripheral base address. param handle Pointer to lpuart_edma_handle_t structure.

◆ LPUART_TransferAbortSendEDMA()

void LPUART_TransferAbortSendEDMA	(	LPUART_Type *	base,
		lpuart_edma_handle_t *	handle
	)

Aborts the sent data using eDMA.

This function aborts the sent data using eDMA.

Parameters

base	LPUART peripheral base address.
handle	Pointer to lpuart_edma_handle_t structure.

brief Aborts the sent data using eDMA.

This function aborts the sent data using eDMA.

param base LPUART peripheral base address. param handle Pointer to lpuart_edma_handle_t structure.

◆ LPUART_TransferCreateHandleEDMA()

void LPUART_TransferCreateHandleEDMA	(	LPUART_Type *	base,
		lpuart_edma_handle_t *	handle,
		lpuart_edma_transfer_callback_t	callback,
		void *	userData,
		edma_handle_t *	txEdmaHandle,
		edma_handle_t *	rxEdmaHandle
	)

Initializes the LPUART handle which is used in transactional functions.

Note: This function disables all LPUART interrupts.

Parameters

base	LPUART peripheral base address.
handle	Pointer to lpuart_edma_handle_t structure.
callback	Callback function.
userData	User data.
txEdmaHandle	User requested DMA handle for TX DMA transfer.
rxEdmaHandle	User requested DMA handle for RX DMA transfer.

brief Initializes the LPUART handle which is used in transactional functions.

note This function disables all LPUART interrupts.

param base LPUART peripheral base address. param handle Pointer to lpuart_edma_handle_t structure. param callback Callback function. param userData User data. param txEdmaHandle User requested DMA handle for TX DMA transfer. param rxEdmaHandle User requested DMA handle for RX DMA transfer.

◆ LPUART_TransferEdmaHandleIRQ()

void LPUART_TransferEdmaHandleIRQ	(	LPUART_Type *	base,
		void *	lpuartEdmaHandle
	)

LPUART eDMA IRQ handle function.

This function handles the LPUART tx complete IRQ request and invoke user callback. It is not set to static so that it can be used in user application.

Note: This function is used as default IRQ handler by double weak mechanism. If user's specific IRQ handler is implemented, make sure this function is invoked in the handler.

Parameters

base	LPUART peripheral base address.
lpuartEdmaHandle	LPUART handle pointer.

brief LPUART eDMA IRQ handle function.

This function handles the LPUART tx complete IRQ request and invoke user callback. It is not set to static so that it can be used in user application. note This function is used as default IRQ handler by double weak mechanism. If user's specific IRQ handler is implemented, make sure this function is invoked in the handler.

param base LPUART peripheral base address. param lpuartEdmaHandle LPUART handle pointer.

◆ LPUART_TransferGetReceiveCountEDMA()

status_t LPUART_TransferGetReceiveCountEDMA	(	LPUART_Type *	base,
		lpuart_edma_handle_t *	handle,
		uint32_t *	count
	)

Gets the number of received bytes.

This function gets the number of received bytes.

Parameters

base	LPUART peripheral base address.
handle	LPUART handle pointer.
count	Receive bytes count.

Return values

kStatus_NoTransferInProgress	No receive in progress.
kStatus_InvalidArgument	Parameter is invalid.
kStatus_Success	Get successfully through the parameter `count`;

brief Gets the number of received bytes.

This function gets the number of received bytes.

param base LPUART peripheral base address. param handle LPUART handle pointer. param count Receive bytes count. retval kStatus_NoTransferInProgress No receive in progress. retval kStatus_InvalidArgument Parameter is invalid. retval kStatus_Success Get successfully through the parameter count;

◆ LPUART_TransferGetSendCountEDMA()

status_t LPUART_TransferGetSendCountEDMA	(	LPUART_Type *	base,
		lpuart_edma_handle_t *	handle,
		uint32_t *	count
	)

Gets the number of bytes written to the LPUART TX register.

This function gets the number of bytes written to the LPUART TX register by DMA.

Parameters

base	LPUART peripheral base address.
handle	LPUART handle pointer.
count	Send bytes count.

Return values

kStatus_NoTransferInProgress	No send in progress.
kStatus_InvalidArgument	Parameter is invalid.
kStatus_Success	Get successfully through the parameter `count`;

brief Gets the number of bytes written to the LPUART TX register.

This function gets the number of bytes written to the LPUART TX register by DMA.

param base LPUART peripheral base address. param handle LPUART handle pointer. param count Send bytes count. retval kStatus_NoTransferInProgress No send in progress. retval kStatus_InvalidArgument Parameter is invalid. retval kStatus_Success Get successfully through the parameter count;

Variable Documentation

◆ callback

lpuart_edma_transfer_callback_t _lpuart_edma_handle::callback

Callback function.

◆ nbytes

uint8_t _lpuart_edma_handle::nbytes

eDMA minor byte transfer count initially configured.

◆ rxDataSizeAll

size_t _lpuart_edma_handle::rxDataSizeAll

Size of the data to receive.

◆ rxEdmaHandle

edma_handle_t* _lpuart_edma_handle::rxEdmaHandle

The eDMA RX channel used.

◆ rxState

volatile uint8_t _lpuart_edma_handle::rxState

RX transfer state

◆ txDataSizeAll

size_t _lpuart_edma_handle::txDataSizeAll

Size of the data to send out.

◆ txEdmaHandle

edma_handle_t* _lpuart_edma_handle::txEdmaHandle

The eDMA TX channel used.

◆ txState

volatile uint8_t _lpuart_edma_handle::txState

TX transfer state.

◆ userData

void* _lpuart_edma_handle::userData

LPUART callback function parameter.

Data Structures

Variables

Driver version

eDMA transactional

Detailed Description

Function Documentation

◆ LPUART_ReceiveEDMA()

◆ LPUART_SendEDMA()

◆ LPUART_TransferAbortReceiveEDMA()

◆ LPUART_TransferAbortSendEDMA()

◆ LPUART_TransferCreateHandleEDMA()

◆ LPUART_TransferEdmaHandleIRQ()

◆ LPUART_TransferGetReceiveCountEDMA()

◆ LPUART_TransferGetSendCountEDMA()

Variable Documentation

◆ callback

◆ nbytes

◆ rxDataSizeAll

◆ rxEdmaHandle

◆ rxState

◆ txDataSizeAll

◆ txEdmaHandle

◆ txState

◆ userData