This is a complete rewrite of the GPS driver structure, with a static
main driver and separate backend drivers. This will allow proper
support for multiple GPSes, and will allow parameters to be set on the
GPS object
the old mechanism wasted most of the input bytes, and chewed a lot of
CPU, making it impractical to do GPS detection for a GPS attached
after startup
The new code is async, and detects a GPS by looking for a fully formed
packet with the right checksum for each GPS type
Major new features:
- No RAM buffer for the NMEA message being parsed; saves 120 bytes of RAM.
- More robust parser, a little less likely to be confused by bad messages.
- Added configuration strings for SiRF, ublox and MediaTek GPS in NMEA mode to select just the messages of interest.
Note that the issue that TinyGPS has with co-ordinates with "different" numbers of decimal digits is addressed in this code.
Size is comparable to the old parser.
git-svn-id: https://arducopter.googlecode.com/svn/trunk@1468 f9c3cf11-9bcb-44bc-f272-b75c42450872
Nuke AP_GPS_IMU, as nothing is using it anymore.
Simplify the handling of no GPS/no fix detection.
Fix prototypes for ::init and ::read.
Update AP_GPS_Auto and corresponding example, nearly ready for primetime.
Use uint8_t rather than byte.
Strip some _error() calls to save space. More could still go.
git-svn-id: https://arducopter.googlecode.com/svn/trunk@1246 f9c3cf11-9bcb-44bc-f272-b75c42450872
Teach AP_GPS about FastSerial (in the few places it needs to know) and about Stream everywhere else.
Do some minor code cleanup.
Tested with Mega and uBlox. Some issues (e.g. reporting 0 satelites) remain.
git-svn-id: https://arducopter.googlecode.com/svn/trunk@404 f9c3cf11-9bcb-44bc-f272-b75c42450872
Andrew Tridgell
Pat Hickey
rmackay9
James Goppert
hazyhxj@gmail.com
james.goppert
DrZiplok@gmail.com
paulbmather@gmail.com
jasonshort