Connecting to a GPS Receiver Input Signal¶
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External GPS receiver signals provide a way for the system to acquire knowledge of the system position and velocity in the Earth’s reference frame. This page serves as a placeholder for the description of the connection to the GPS receiver. In addition to connecting to the receiver, the unit needs to know what format the input signal will be (for example, NMEA or NovAtel) and what the message will be (GGA vs VTG, etc.).
To connect the system to an external GPS receiver, the first step is to connect the TX and RX lines to the appropriate pins for the device being used:
The second step in connecting to a GPS receiver is to configure the firmware to use the signals. An ideal place to perform this task is during initialization of the user-generated algorithm, commonly executed in dataProcessingAndPresentation.c.