Data Structures
struct	input_stream_from_uart
	Concrete struct for a Serial Line input stream. More...

struct	ltrx_line_capabilities
	Represents capabilities of a Serial Line. More...

struct	ltrx_line_driver
	API's for a serial line driver. More...

struct	ltrx_line_protocol
	Represents a line protocol for registration. More...

struct	output_stream_to_uart
	Concrete struct for a Serial Line output stream. More...

Macros
#define	LINE_REGISTRATION_FAILED 0xff
	Index out of range error code. More...

Functions
bool	ltrx_input_stream_init_from_uart (struct input_stream_from_uart *inStream, unsigned int zeroBasedIndex)
	Set up an input stream from a Serial Line. More...

void	ltrx_line_close (uint16_t zeroBasedLine)
	Relinquish a line previously opened. More...

const struct ltrx_line_capabilities *	ltrx_line_get_capabilities (uint16_t zeroBasedLine)
	Gets the capabilities of the line. More...

bool	ltrx_line_get_dsr (uint16_t zeroBasedLine, bool *dsr)
	Get DSR status. More...

uint8_t	ltrx_line_get_registered_count (void)
	Get the count of registered lines. More...

const char *	ltrx_line_get_registered_name (uint16_t zeroBasedLine)
	Get the registered name of a Line. More...

bool	ltrx_line_open (uint16_t zeroBasedLine, uint32_t blockTimeMsec)
	Open a line for exclusive use. More...

void	ltrx_line_purge (uint16_t zeroBasedLine)
	Purge data. More...

uint16_t	ltrx_line_read (uint16_t zeroBasedLine, uint8_t *dataPointerLocation, size_t max_size, bool optBreakDetected, uint32_t blockTimeMsec)
	Read data. More...

uint16_t	ltrx_line_read_bytes_available (uint16_t zeroBasedLine, struct ltrx_trigger *optReadTrigger)
	How many bytes are available? More...

void	ltrx_line_set_dtr (uint16_t zeroBasedLine, bool dtr)
	Set DTR value. More...

bool	ltrx_line_write (uint16_t zeroBasedLine, const void data, size_t size, struct ltrx_trigger optWriteTrigger)
	Write data. More...

uint8_t	ltrx_logical_line_driver_register (const struct ltrx_line_driver driver, const char name)
	Register a driver for one or more logical Lines. More...

bool	ltrx_output_stream_init_to_uart (struct output_stream_to_uart *outStream, unsigned int zeroBasedIndex)
	Set up an output stream to a Serial Line. More...

Detailed Description

The Serial Line refers to a Universal Asynchronous Receiver/Transmitter (UART) interface. These definitions relate to operation of the interface.

Macro Definition Documentation

#define LINE_REGISTRATION_FAILED 0xff

Index out of range error code.

This error code indicates the number of registered line is over the max number of lines allowed

Function Documentation

bool ltrx_input_stream_init_from_uart	(	struct input_stream_from_uart *	inStream,
		unsigned int	zeroBasedIndex
	)

Set up an input stream from a Serial Line.

Return values

true	Success.
false	Failed.

Parameters

[out]	inStream	Your UART input stream struct to initialize.
[in]	zeroBasedIndex	0 for line 1, 1 for line 2, and so on.

void ltrx_line_close ( uint16_t zeroBasedLine )

Relinquish a line previously opened.

Previously you would have called ltrx_line_open() and saw it return true. This will allow other threads to open the line.

Parameters

[in] zeroBasedLine 0 for line 1, 1 for line 2, and so on.

const struct ltrx_line_capabilities* ltrx_line_get_capabilities ( uint16_t zeroBasedLine )

Gets the capabilities of the line.

Returns: Capabilities of the designated Serial Line.

Parameters

[in] zeroBasedLine 0 for line 1, 1 for line 2, and so on.

bool ltrx_line_get_dsr	(	uint16_t	zeroBasedLine,
		bool *	dsr
	)

Get DSR status.

Note that on some lines, a CP may need to be configured to read DSR.

Return values

true	The result is in dsr.
false	No DSR status was available.

Parameters

[in]	zeroBasedLine	0 for line 1, 1 for line 2, and so on.
[out]	dsr	DSR status: `true` for asserted.

uint8_t ltrx_line_get_registered_count ( void )

Get the count of registered lines.

Returns: The number of registered lines.

const char* ltrx_line_get_registered_name ( uint16_t zeroBasedLine )

Get the registered name of a Line.

Returns: Name.

Return values

NULL Failed.

Parameters

[in] zeroBasedLine 0 for line 1, 1 for line 2, and so on.

bool ltrx_line_open	(	uint16_t	zeroBasedLine,
		uint32_t	blockTimeMsec
	)

Open a line for exclusive use.

Warning: Check the return value even if you specify TIME_WAIT_FOREVER because your thread can return early if another thread calls ltrx_thread_wake().

Return values

true	Success.
false	Failed.

Parameters

[in]	zeroBasedLine	0 for line 1, 1 for line 2, and so on.
[in]	blockTimeMsec	How long to wait if line is in use. To wait indefinitely, use TIME_WAIT_FOREVER.

void ltrx_line_purge ( uint16_t zeroBasedLine )

Purge data.

Clears any data not yet read from the Serial Line and any data previously written but not yet sent out on the Serial Line.

Parameters

[in] zeroBasedLine 0 for line 1, 1 for line 2, and so on.

uint16_t ltrx_line_read	(	uint16_t	zeroBasedLine,
		uint8_t **	dataPointerLocation,
		size_t	max_size,
		bool *	optBreakDetected,
		uint32_t	blockTimeMsec
	)

Read data.

The number of bytes to be read will be limited by max_size, but this call will generally return with fewer bytes. The number of bytes is governed by the Line configured Gap Timer and Threshold.

If /c 0 bytes were read, your data pointer will not have been filled in, so do not attempt to reference it.

You are free to read the data under the data pointer until either your next call to ltrx_line_read() or ltrx_line_close().

Returns: Number of bytes sitting under the data pointer.

Parameters

[in]	zeroBasedLine	0 for line 1, 1 for line 2, and so on.
[out]	dataPointerLocation	Points to a data pointer to be filled in.
[in]	max_size	Maximum bytes to read.
[out]	optBreakDetected	Optional pointer to flag to detect line breaks.
[in]	blockTimeMsec	How long to wait for data. To wait indefinitely, use TIME_WAIT_FOREVER.

uint16_t ltrx_line_read_bytes_available	(	uint16_t	zeroBasedLine,
		struct ltrx_trigger *	optReadTrigger
	)

How many bytes are available?

If optReadTrigger is not NULL, the trigger will later be signaled when data is available.

Returns: Number of bytes available to read.

Parameters

[in]	zeroBasedLine	0 for line 1, 1 for line 2, and so on.
[in]	optReadTrigger	Optional pointer to trigger.

void ltrx_line_set_dtr	(	uint16_t	zeroBasedLine,
		bool	dtr
	)

Set DTR value.

Note that on some lines, a CP may need to be configured to write DTR.

Parameters

[in]	zeroBasedLine	0 for line 1, 1 for line 2, and so on.
[in]	dtr	DTR value: `true` for asserted.

bool ltrx_line_write	(	uint16_t	zeroBasedLine,
		const void *	data,
		size_t	size,
		struct ltrx_trigger *	optWriteTrigger
	)

Write data.

If optWriteTrigger is NULL, this function blocks until the write is completed. Otherwise this routine returns without blocking and the trigger will later be signaled when the write has completed.

Return values

true	Success.
false	Failure.

Parameters

[in]	zeroBasedLine	0 for line 1, 1 for line 2, and so on.
[in]	data	Data to be written.
[in]	size	Number of bytes under data to be written.
[in]	optWriteTrigger	Optional pointer to trigger.

uint8_t ltrx_logical_line_driver_register	(	const struct ltrx_line_driver *	driver,
		const char *	name
	)

Register a driver for one or more logical Lines.

Return values

LINE_REGISTRATION_FAILED Failed.

Returns: Index of the first Line.

Parameters

[in]	driver	Structure comprising the Line driver.
[in]	name	The name for the Line being registered.

bool ltrx_output_stream_init_to_uart	(	struct output_stream_to_uart *	outStream,
		unsigned int	zeroBasedIndex
	)

Set up an output stream to a Serial Line.

Return values

true	Success.
false	Failed.

Parameters

[out]	outStream	Your UART output stream struct to initialize.
[in]	zeroBasedIndex	0 for line 1, 1 for line 2, and so on.

Data Structures

Macros

Functions

Detailed Description

Macro Definition Documentation

Function Documentation