Bosch DISBLAY DDU 7, Manual, Page: 143 / 160

GPS Sensor
GPS (Global Positioning System)
Space‐based global navigation satellite system.
GPS provides positioning, navigation, and timing services to worldwide users.
GPS receiver (sensor) gives digital information about position (longitude, latitude,
height), ground speed, course, and status.
Two types of GPS receivers:
CAN output ‐> Read in messages via CAN Input of DDU 7 (not covered here)
Serial output ‐> Read in messages via RS232 Interface of DDU 7 (serial interface
2)
Serial interface characterization
Serial Interface is characterized by:
Voltage levels: RS232 is standard (+/‐12 V), UART (0 V/ 5 V) needs level shifter
Baud rate: 9,600 is standard for GPS, DDU 7 supports 1,200 to 115,200 baud. GPS
Rx interface baud rate must match DDU 7 interface baud rate. DDU 7 Baud rate
can be set with the ‘GPS_BAUDRATE’ characteristic Data format: DDU 7 expects 8
data bits, no parity bit, 1 stop bit (8N1)
Protocol
DDU 7 expects NMEA Protocol (ASCII).
The following messages are decoded:
Message Function
GGA GPS fix information
GSA Overall satellite data
GSV Detailed satellite data
RMC Recommended minimum data for GPS
VTG Vector track and speed over the ground
On most GPS sensors, these messages are activated in the default configuration.
Sensor recommendation
The system has been tested with the Navilock NL‐8004P MD6 Serial PPS Multi
GNSS Receiver. This sensor is based on a U‐Blox 8 chipset and is fully configura‐
ble with the Navilock “U‐Center” software. To use this sensor with Bosch Motor‐
sport components the transfer rate, the satellite system and the update rate need
to be reconfigured. More information about the configuration can be found in
the Appendix.
17
17.1
17.1.1
17.2
17.3
GPS Sensor | 17
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