LPUART FreeRTOS Driver

Overview

Data Structures
struct	lpuart_rtos_config_t
	LPUART RTOS configuration structure. More...

Driver version
#define	FSL_LPUART_FREERTOS_DRIVER_VERSION   (MAKE_VERSION(2, 6, 0))
	LPUART FreeRTOS driver version. More...

LPUART RTOS Operation
int	LPUART_RTOS_Init (lpuart_rtos_handle_t *handle, lpuart_handle_t *t_handle, const lpuart_rtos_config_t *cfg)
	Initializes an LPUART instance for operation in RTOS. More...
int	LPUART_RTOS_Deinit (lpuart_rtos_handle_t *handle)
	Deinitializes an LPUART instance for operation. More...

LPUART transactional Operation
int	LPUART_RTOS_Send (lpuart_rtos_handle_t *handle, uint8_t *buffer, uint32_t length)
	Sends data in the background. More...
int	LPUART_RTOS_Receive (lpuart_rtos_handle_t *handle, uint8_t *buffer, uint32_t length, size_t *received)
	Receives data. More...
int	LPUART_RTOS_SetRxTimeout (lpuart_rtos_handle_t *handle, uint32_t rx_timeout_constant_ms, uint32_t rx_timeout_multiplier_ms)
	Set RX timeout in runtime. More...
int	LPUART_RTOS_SetTxTimeout (lpuart_rtos_handle_t *handle, uint32_t tx_timeout_constant_ms, uint32_t tx_timeout_multiplier_ms)
	Set TX timeout in runtime. More...

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Data Structure Documentation

struct lpuart_rtos_config_t

Data Fields
LPUART_Type *	base
	UART base address.
uint32_t	srcclk
	UART source clock in Hz.
uint32_t	baudrate
	Desired communication speed.
lpuart_parity_mode_t	parity
	Parity setting.
lpuart_stop_bit_count_t	stopbits
	Number of stop bits to use.
uint8_t *	buffer
	Buffer for background reception.
uint32_t	buffer_size
	Size of buffer for background reception.
uint32_t	rx_timeout_constant_ms
	RX timeout applied per receive.
uint32_t	rx_timeout_multiplier_ms
	RX timeout added for each byte of the receive. More...
uint32_t	tx_timeout_constant_ms
	TX timeout applied per transmition.
uint32_t	tx_timeout_multiplier_ms
	TX timeout added for each byte of the transmition. More...
bool	enableRxRTS
	RX RTS enable.
bool	enableTxCTS
	TX CTS enable.
lpuart_transmit_cts_source_t	txCtsSource
	TX CTS source.
lpuart_transmit_cts_config_t	txCtsConfig
	TX CTS configure.

Field Documentation

uint32_t lpuart_rtos_config_t::rx_timeout_multiplier_ms

uint32_t lpuart_rtos_config_t::tx_timeout_multiplier_ms

Macro Definition Documentation

#define FSL_LPUART_FREERTOS_DRIVER_VERSION   (MAKE_VERSION(2, 6, 0))

Function Documentation

int LPUART_RTOS_Init	(	lpuart_rtos_handle_t *	handle,
		lpuart_handle_t *	t_handle,
		const lpuart_rtos_config_t *	cfg
	)

Parameters

handle	The RTOS LPUART handle, the pointer to an allocated space for RTOS context.
t_handle	The pointer to an allocated space to store the transactional layer internal state.
cfg	The pointer to the parameters required to configure the LPUART after initialization.

Returns

0 succeed, others failed

int LPUART_RTOS_Deinit

(

lpuart_rtos_handle_t *

handle

)

This function deinitializes the LPUART module, sets all register value to the reset value, and releases the resources.

Parameters

handle

The RTOS LPUART handle.

int LPUART_RTOS_Send	(	lpuart_rtos_handle_t *	handle,
		uint8_t *	buffer,
		uint32_t	length
	)

This function sends data. It is an synchronous API. If the hardware buffer is full, the task is in the blocked state.

Parameters

handle	The RTOS LPUART handle.
buffer	The pointer to buffer to send.
length	The number of bytes to send.

int LPUART_RTOS_Receive	(	lpuart_rtos_handle_t *	handle,
		uint8_t *	buffer,
		uint32_t	length,
		size_t *	received
	)

This function receives data from LPUART. It is an synchronous API. If any data is immediately available it is returned immediately and the number of bytes received.

Parameters

handle	The RTOS LPUART handle.
buffer	The pointer to buffer where to write received data.
length	The number of bytes to receive.
received	The pointer to a variable of size_t where the number of received data is filled.

int LPUART_RTOS_SetRxTimeout	(	lpuart_rtos_handle_t *	handle,
		uint32_t	rx_timeout_constant_ms,
		uint32_t	rx_timeout_multiplier_ms
	)

This function can modify RX timeout between initialization and receive.

param handle The RTOS LPUART handle. param rx_timeout_constant_ms RX timeout applied per receive. param rx_timeout_multiplier_ms RX timeout added for each byte of the receive.

int LPUART_RTOS_SetTxTimeout	(	lpuart_rtos_handle_t *	handle,
		uint32_t	tx_timeout_constant_ms,
		uint32_t	tx_timeout_multiplier_ms
	)

This function can modify TX timeout between initialization and send.

param handle The RTOS LPUART handle. param tx_timeout_constant_ms TX timeout applied per transmition. param tx_timeout_multiplier_ms TX timeout added for each byte of the transmition.