Software Documentation: Difference between revisions
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==GPS File Layout== | ==GPS File Layout== | ||
The following structure is used to write the GPS data into a binary file on the SD card. This allows for easy access by the prediction routines later on. The thought is to have a separate (human-readable) file to log the plain NMEA strings to. | |||
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Revision as of 01:07, 21 May 2012
Most of the software is documented using specially formatted comments that can be parsed by doxygen. This mostly details what each function does and what kind of parameters to give it. Anything else that isn't detailed there will be put below
GPS File Layout
The following structure is used to write the GPS data into a binary file on the SD card. This allows for easy access by the prediction routines later on. The thought is to have a separate (human-readable) file to log the plain NMEA strings to.
| Size (bits) | Description |
|---|---|
| 8 | Hours, GMT |
| 8 | Minutes |
| 8 | Seconds |
| 32 | Latitude in degrees * 10^7 where + is North and - is South |
| 32 | Longitude in degrees * 10^7 where + is East and - is West |
| 32 | Altitude above MSL in cm |
| 16 | Groundspeed in cm/s |
| 16 | Heading CW from north in units of 0.01 degrees |
| 16 | Number of tracked Satellites |