This is really just calculating the hamming weight of the GNSS_MODE bitmask, but I don't know if the APM compiler could handle the GCC intrinsic that could calculate it faster, and this is done so rarely there isn't a significant penalty to using the for loop.
This commit changes the way libraries headers are included in source files:
- If the header is in the same directory the source belongs to, so the
notation '#include ""' is used with the path relative to the directory
containing the source.
- If the header is outside the directory containing the source, then we use
the notation '#include <>' with the path relative to libraries folder.
Some of the advantages of such approach:
- Only one search path for libraries headers.
- OSs like Windows may have a better lookup time.
Provides a stable fallback, and can be considered fairly safe from the perspective that it provides a worse value then the hDOP under almost all scenarios.
Ublox 7 and 8 seires use a UBX-CFG-GNSS message to enable satellite constellations. The default value does not enable any additional ones, and any constellations the reciever doesn't report knowing about are not configured.
Remove race condition on sending intial blob to the GPS, it was possible to send a blob that got the GPS configured enough to allow the autodetect to take over (and then some drivers like ublox would not finish sending the blob, which has potential details that the driver might have needed to send)
Limit the delay to checking for NMEA gps to only checking after all the available baud rates have been checked
Since a UBlox will actually report having DGPS (due to SBAS or RTCM data) actually report this as the highest supported mode
Rapid switching between GPS receivers can cause real problems.
Switch if:
1) secondary GPS has 1 more satellite for at least 20 seconds
OR
2) secondary GPS has 2 more satellites for at least 5 seconds
Fixes https://github.com/diydrones/ardupilot/pull/2320
Michael Oborne
Randy Mackay
Andrew Tridgell
Tom Pittenger
Lucas De Marchi
Michael du Breuil
Gustavo Jose de Sousa
Julien BERAUD
Andy Piper
kozinalexey
dzollo
mirkix
Eugene Shamaev
Peter Barker
Peter Barker