Paparazzi UAS  v5.15_devel-50-g4d7045d
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gps_nmea module

NMEA GPS (UART)

Driver for GPS modules using the NMEA protocol.

Example for airframe file

Add to your firmware section: This example contains all possible configuration options, not all of them are mandatory!

1 <module name="gps_nmea">
2  <configure name="NMEA_GPS_PORT" value="UARTx" />
3  <configure name="NMEA_GPS_BAUD" value="B38400" />
4 </module>

Module configuration options

Configure Options

  • name: NMEA_GPS_PORT value: UARTx
    Description: UART where the GPS is connected to (UART1, UART2, etc
  • name: NMEA_GPS_BAUD value: B38400
    Description: UART baud rate

Auto-loaded modules

The following modules are automatically loaded (just as if you had added them in the airframe file)

Module functions

Init Functions

These initialization functions are called once on startup.

Event Functions

These event functions are called in each cycle of the module event loop.

Periodic Functions

These functions are called periodically at the specified frequency from the module periodic loop.

Files

Header Files

The following headers are automatically included in modules.h

Source Files

Raw gps_nmea.xml file:

<!DOCTYPE module SYSTEM "module.dtd">
<module name="gps_nmea" dir="gps">
<doc>
<description>
NMEA GPS (UART)
Driver for GPS modules using the NMEA protocol.
</description>
<configure name="NMEA_GPS_PORT" value="UARTx" description="UART where the GPS is connected to (UART1, UART2, etc"/>
<configure name="NMEA_GPS_BAUD" value="B38400" description="UART baud rate"/>
</doc>
<autoload name="gps"/>
<autoload name="gps_nps"/>
<autoload name="gps_sim"/>
<header>
<file name="gps.h" dir="subsystems"/>
</header>
<init fun="gps_nmea_init()"/>
<periodic fun="gps_nmea_periodic_check()" freq="1." autorun="TRUE"/>
<event fun="gps_nmea_event()"/>
<makefile target="ap|fbw">
<configure name="NMEA_GPS_PORT" default="$(GPS_PORT)" case="upper|lower"/>
<configure name="NMEA_GPS_BAUD" default="$(GPS_BAUD)"/>
<file name="gps_nmea.c" dir="subsystems/gps"/>
<define name="USE_$(NMEA_GPS_PORT_UPPER)"/>
<define name="NMEA_GPS_LINK" value="$(NMEA_GPS_PORT_LOWER)"/>
<define name="$(NMEA_GPS_PORT_UPPER)_BAUD" value="$(NMEA_GPS_BAUD)"/>
<raw>
ifdef SECONDARY_GPS
ifneq (,$(findstring $(SECONDARY_GPS), nmea))
# this is the secondary GPS
$(TARGET).CFLAGS += -DGPS_SECONDARY_TYPE_H=\"subsystems/gps/gps_nmea.h\"
$(TARGET).CFLAGS += -DSECONDARY_GPS=GPS_NMEA
else
$(TARGET).CFLAGS += -DGPS_TYPE_H=\"subsystems/gps/gps_nmea.h\"
$(TARGET).CFLAGS += -DPRIMARY_GPS=GPS_NMEA
endif
else
# plain old single GPS usage
$(TARGET).CFLAGS += -DGPS_TYPE_H=\"subsystems/gps/gps_nmea.h\"
endif
</raw>
</makefile>
<makefile target="fbw">
<define name="USE_GPS"/>
</makefile>
</module>