Seasmart.cpp File Reference

#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include "Seasmart.h"

Include dependency graph for Seasmart.cpp:

Go to the source code of this file.

Functions
static int	append2Bytes (char *s, uint16_t i)
static int	appendByte (char *s, uint8_t byte)
static int	appendWord (char *s, uint32_t i)
size_t	N2kToSeasmart (const tN2kMsg &msg, uint32_t timestamp, char *buffer, size_t size)
	Converts a tN2kMsg into a $PCDIN NMEA sentence. More...
static uint8_t	nmea_compute_checksum (const char *sentence)
static bool	readNHexByte (const char *s, unsigned int n, uint32_t &value)
bool	SeasmartToN2k (const char *buffer, uint32_t &timestamp, tN2kMsg &msg)
	Converts a null terminated $PCDIN NMEA sentence into a tN2kMsg. More...

Variables
static const char *	hex = "0123456789ABCDEF"

Function Documentation

append2Bytes()

static int append2Bytes ( char *  s, uint16_t  i  )

static

Definition at line 39 of file Seasmart.cpp.

appendByte()

static int appendByte ( char *  s, uint8_t  byte  )

static

Definition at line 33 of file Seasmart.cpp.

appendWord()

static int appendWord ( char *  s, uint32_t  i  )

static

Definition at line 45 of file Seasmart.cpp.

N2kToSeasmart()

size_t N2kToSeasmart	(	const tN2kMsg &	msg,
		uint32_t	timestamp,
		char *	buffer,
		size_t	size
	)

Converts a tN2kMsg into a $PCDIN NMEA sentence.

Converts a tN2kMsg into a $PCDIN NMEA sentence, following the Seasmart specification. The buffer must be at least (30 + 2*msg.DataLen) bytes long.

[Seasmart Protocol Reference] (http://www.seasmart.net/pdf/SeaSmart_HTTP_Protocol_RevG_043012.pdf)

If the buffer is not long enough, this function returns 0 and does not do anything.

If the buffer is long enough, this function returns the number of bytes written including the terminating \0 (but this function does not add the NMEA separator \r\n).

Parameters

msg	Reference to a N2kMsg Object
timestamp	Timestamp of the message
buffer	char array buffer for seasmart message
size	size of the char buffer

Returns

size_t

Definition at line 67 of file Seasmart.cpp.

nmea_compute_checksum()

static uint8_t nmea_compute_checksum ( const char *  sentence )

static

Definition at line 51 of file Seasmart.cpp.

readNHexByte()

static bool readNHexByte ( const char *  s, unsigned int  n, uint32_t &  value  )

static

Definition at line 102 of file Seasmart.cpp.

SeasmartToN2k()

bool SeasmartToN2k	(	const char *	buffer,
		uint32_t &	timestamp,
		tN2kMsg &	msg
	)

Converts a null terminated $PCDIN NMEA sentence into a tN2kMsg.

Converts a null terminated $PCDIN NMEA sentence into a tN2kMsg and updates timestamp with the timestamp of the sentence.

[Seasmart Protocol Reference] (http://www.seasmart.net/pdf/SeaSmart_HTTP_Protocol_RevG_043012.pdf)

The NMEA \r\n terminator is not required.

Parameters

buffer	char array buffer with seasmart message
timestamp	Timestamp of the message
msg	Reference to a N2kMsg Object

Returns

true -> Success

false -> an error occurred

Definition at line 121 of file Seasmart.cpp.

Variable Documentation

hex

const char* hex = "0123456789ABCDEF"

static

Definition at line 31 of file Seasmart.cpp.