Compatible with:
DOS Maximite CMM MM150 MM170 MM+ MMX
Picromite ArmiteL4
Armite F4 ArmiteH7 Picomite CMM2
Syntax:
GPS(option)
PRINT #GPS, string$
Description:
The GPS functions are used to return data from a
serial communications channel opened as GPS.
GPS uses the $GNGGA, $GNRMC, $GPGGA and $GPRMC messages.
The function GPS(VALID) should be checked before any
of these functions are used to ensure that the returned value is valid.
| GPS(ALTITUDE) |
Returns current altitude (if sentence GGA is
enabled). |
| GPS(DATE) |
Returns the normal date string corrected for local
time e.g. “12-01-2020”. |
| GPS(DOP) |
Returns DOP (dilution of precision) value (if
sentence GGA is enabled). |
| GPS(FIX) |
Returns 0=no fix, 1=fix, etc. if sentence GGA enabled |
| GPS(GEOID) |
Returns the geoid-ellipsoid separation (if sentence
GGA is enabled). |
| GPS(LATITUDE) |
Returns the latitude in degrees as a floating point
number, values are negative
for South of equator |
| GPS
LONGITUDE) |
Returns the longitude in degrees as a floating point
number, values are negative
for West of the meridian. |
| GPS(SATELLITES) |
Returns number of satellites in view (if sentence GGA
is enabled). |
| GPS(SPEED) |
Returns the ground speed in knots as a floating point
number. |
| GPS(TIME) |
Returns the normal time string corrected for local
time e.g. “12:09:33”. |
| GPS(TRACK) |
Returns the track over the ground (degrees true) as a
floating point number. |
| GPS(VALID) |
Returns: 0=invalid data, 1=valid data |
| PRINT #GPS,
string$ |
Outputs a NMEA string to an opened GPS device. The
string must start with a $ character and end with a * character. The
checksum is calculated automatically by the firmware and is appended to
the string together with the carriage return and line feed characters. |
OPEN "com1: 9600" AS GPS,10
DO
IF GPS(VALID) THEN
PRINT GPS(TIME), GPS(LATITUDE), GPS(LONGITUDE),
GPS(ALTITUDE);
PRINT GPS(SATELLITES), GPS(DOP), GPS(FIX)
ELSE
PRINT GPS(SATELLITES), GPS(DOP), GPS(FIX)
ENDIF
PAUSE 1000
LOOP
CLOSE GPS
END
Last edited: 25 February, 2021