79 lines
2.7 KiB
Markdown
79 lines
2.7 KiB
Markdown
# minmea, the lightweight GPS NMEA 0183 parser library
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Minmea is a minimalistic GPS parser library intended for resource-constrained
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platforms, especially microcontrollers and other embedded systems.
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## Features
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* Written in ISO C99.
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* No dynamic memory allocation.
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* No floating point usage in the core library.
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* Supports both fixed and floating point values.
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* One source file and one header - can't get any simpler.
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* Easily extendable to support new sentences.
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* Complete with a test suite and static analysis.
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## Supported sentences
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* ``$GPRMC``
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* ``$GPGGA``
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Adding support for more sentences is trivial; see ``minmea.c`` source.
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## Example
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```c
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char line[MINMEA_MAX_LENGTH];
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while (fgets(line, sizeof(line), stdin) != NULL) {
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printf("%s", line);
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switch (minmea_type(line)) {
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case MINMEA_GPRMC: {
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struct minmea_gprmc frame;
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if (minmea_parse_gprmc(&frame, line)) {
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printf("+++ raw coordinates and speed: (%d/%d,%d/%d) %d/%d\n",
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frame.latitude, frame.latitude_scale,
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frame.longitude, frame.longitude_scale,
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frame.speed, frame.speed_scale);
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printf("+++ fixed-point coordinates and speed scaled to three decimal places: (%d,%d) %d\n",
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minmea_rescale(frame.latitude, frame.latitude_scale, 1000),
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minmea_rescale(frame.longitude, frame.longitude_scale, 1000),
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minmea_rescale(frame.speed, frame.speed_scale, 1000));
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printf("+++ floating point degree coordinates and speed: (%f,%f) %f\n",
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minmea_coord(frame.latitude, frame.latitude_scale),
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minmea_coord(frame.longitude, frame.longitude_scale),
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minmea_float(frame.speed, frame.speed_scale));
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}
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} break;
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case MINMEA_GPGGA: {
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struct minmea_gpgga frame;
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if (minmea_parse_gpgga(&frame, line)) {
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printf("$GPGGA: fix quality: %d\n", frame.fix_quality);
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}
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} break;
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default: {
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} break;
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}
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}
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```
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## Integration with your project
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Simply add ``minmea.[ch]`` to your project, ``#include "minmea.h"`` and you're
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good to go.
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## Running unit tests
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Building and running the tests requires the following:
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* Check Framework (http://check.sourceforge.net/).
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* Clang Static Analyzer (http://clang-analyzer.llvm.org/).
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If you have both in your ``$PATH``, running the tests should be as simple as
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typing ``make``.
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## Bugs
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There are plenty. Report them on GitHub, or - even better - open a pull request.
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