Racelogic Ltd
Lap Timing Mode
Page
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Split to Split time
There are two different ways of measuring split times, the default is from the start of the
lap to the split, the other way is from one split to another. You can change the method of
calculating split times by using the option ‘SPLIT TO SPLIT TIME’ in the LAPTIMING
MENU.
Split Widths
When setting a start / finish or split line, DriftBox will set the width of the line at a default
value of 25m (12.5m either side of the point at which the OK button was pressed.)
However this can be changed by selecting the Split Widths function and altering the value
using the
▲▼
buttons. This feature is useful if DriftBox is being used on a track where
separate sections pass closely by each other, and eliminates the possibility of going
through a split line in the wrong direction.
Clearing your Best Lap time
Press and hold the
RESET
button for 1.5s.
Laptime Telemetry
LAPTIMING MENU
ONE SHOT MODE
SPLIT TO SPLIT TIME
BIG SPEED @SPLIT
SPLIT WIDTHS
SPLIT OUTPUT
LAPTIME PULSE
√
LAPTIME TELEMETRY
SETUP
The Laptime Telemetry option makes DriftBox send lap time data via the telemetry serial
port whenever a start/finish, split line or dedicated finish line is crossed. The lap time serial
stream has the following format, sent at a baud rate of 115200 bit/sec, no parity, 8 data
bits and 1 stop bit.
$$llttnnnllluuusscc
•
ll:
length of message
•
tt:
message type (type 10 - LapTime)
•
nnn: serial
number
•
s:
number of sats currently in view
•
lll:
laptime(seconds) * 100000
•
uuu: UTC time(seconds) * 100
•
ss:
speed at this point*100 (kph or mph, depending on the units selected)
•
cc: checksum
Each telemetry message will be sent twelve times unless an acknowledge message is
received.
Laptime Pulse
If the Laptime Pulse option is enabled, a 250ms pulse is output on the serial port instead.
Note that selecting either of these two options disables the other option. It is possible to
deactivate both modes by un-ticking whichever option is currently ticked, if any.
