Re: [Cstk-devonly] NMEA Parser

[Kristof V. L. <kr...@co...>]

Hi Stuart,

Sanity check = ok :) 

In fact, this method fits definitely for the other parser classes as
well.. You do need to add the channels and channel-length to the method I
guess:
virtual int read_line(char *line, DataCell* channels, uint numchannels)=0;
so the method directly returns the channels in one go, right?

Best,
	Kristof.

http://www.comp.lancs.ac.uk/~kristof/

On Sat, 3 Apr 2004, Stuart Reeves wrote:

> 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...