[Cstk-devonly] NMEA Parser

[Stuart R. <st...@Cs...>]

I've implemented a basic NMEA parser with two basic methods:

int parse_sentence(DataCell *channels, uint numchannels);

int parse_sentence(DataCell *channels, 
		   uint      numchannels, 
		   char      *sentence);

Essentially they get any NMEA string and parse the data into fields,
performing a checksum etc. (The top method reads from a file.) What now
needs to be done is to hook this up to SensorData implementors. This means
that I would want to be retreiving a data string from a log file or RS232.
For example, another method could be added to SensorData s.t.:

virtual int read_line(char *line)=0;

Implementors would make this method put a string version of the entire
line (e.g. scanned from a file or taken from the RS232 port) into char
*line so that the NMEA parser could be hooked up to it and put the
relevant NMEA data into channels...

Make sense? Don't know if this is the best way to get around this problem
or not...


later,
Stuart
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