gpsUpdateFreq (Function)

This function sets the frequency at which new positions can be read from a SuperGPS-based device.

Using an update frequency of more than 1 position per. second requires that the system speed is minimum set to Fast (24 Mhz).
 

Note:
When using gpsEnableNMEA it must be ensured that the baud-rate used on the serial port is set sufficiently high to cope with the update frequency.

Operating at mode=2 (4 positions per. second) will only forward data to a connected NMP in every 2nd call to gpsFix.
This function can not be used if the GPS in in low power mode.
 

Input:

mode : SINT (Default: 0)

0 = Standard mode (max. 1 position per second).

1 = Fast mode (max. 2 positions per second).

2 = Fastest mode (max. 4 positions per second).

Returns: INT

Declaration:

FUNCTION gpsUpdateFreq : INT;
VAR_INPUT
  mode : SINT;
END_VAR;

Example:

INCLUDE rtcu.inc
 
PROGRAM test;
 
gpsPower(power := ON);
gpsUpdateFreq(mode := 2);
..
 
BEGIN
END;
END_PROGRAM;