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15.1 GPS (Global Positioning System)
15.2 Protocol
15.3 Sensor Recommendation
Bosch Motorsport
15 GPS Sensor
– 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 MSI 60 (not covered here).
– Serial output -> Read in messages via RS232 Interface of MSI 60.
Serial Interface Characterization
– Voltage levels: RS232 is standard (+/-12 V), UART (0 V/ 5 V) needs level shifter.
– Baud rate: 9,600 is standard for GPS, MSI 60 supports 1,200 to 115,200 baud. GPS Rx
interface baud rate must match the device baud rate. MSI 60 baud rate can be set
with the 'GPS_BAUDRATE' characteristic.
– Data format: MSI 60 expects 8 data bits, no parity bit, 1 stop bit (8N1).
MSI 60 expects NMEA Protocol (ASCII).
The following messages are decoded:
Message
GGA
GSA
GSV
RMC
VTG
On most GPS sensors, these messages are activated in the default configuration.
The system has been tested with a Navilock NL 403P serial GPS receiver.
This sensor is based on an UBlox5 chipset and is fully configurable with UCenter SW.
Modular Sensor Interface MSI 60
Function
GPS fix information
Overall satellite data
Detailed satellite data
Recommended minimum data for GPS
Vector track and speed over the ground
GPS Sensor | 15
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