Add "GPS_Present" Bit To GPS Bitmask Parsing

[kb1lqd]

Overview An unused bit in the GPS bitmask of the FLASH parsing should be updated to communicate the presence of a GPS unit on the Faraday unit. This will be used to easily determine if a GPS should be onboard or not but does not indicate the status of the GPS unit if installed, for that the presence of the telemetry "GPS FIX" is used.

Implementation Details

• Update software to parse "GPS_Present" bit from GPS bitmask
• Update device configuration INI file to include GPS_Present bit configuration
• Update firmware for default unit factory reset value

Operation This bit is used simple to query the presence of a GPS.

• GPS_Present = HIGH
  • GPS is present and Faraday should attempt to parse valid GPS string
• GPS_Present = LOW
  • GPS is a not present and Faraday should default to internally saved default location

[kb1lqd]

Post-pone since simply using default location whenever GPS fix not acquired or no GPS string is likely OK.

[kb1lqd]

False, need a flash bit since no GPS means no NMEA uart data from unit and thus we'll be stuck without a trigger to trigger the grab from flash or GPS dynamically. Need to add flash bit in and assume it is set correctly.

[kb1lqd]

Adding as BIT 1 in GPS Bitmask in flash memory:

[kb1lqd]

GPS Bitmask default in the factory reset can stay 0x01 since default should be no GPS installed and unit configured to have a GPS.

[kb1lqd]

Confirmed addition of bit and operation:

GPS_Present bit HIGH:

GPS_Present bit LOW: Lon/Lat set to "123456..." along with defaults for all other fields.

[kb1lqc]

Is this implemented @kb1lqd ? Our manual method of telling a unit if it has a GPS installed seems to work fine right now during Faraday programming.

[el-iso]

@kb1lqc Setting the GPS_Present bit worked for me when I was doing setup.

[kb1lqc]

Hey @kb1lqd lets chat about this one, I can't tell if it's actually implemented haha...