u-blox ANTARIS 4 - Serial Communication


your position is our focus
 antennasupervisoruse theUBX-CFG-ANTmessage.For furtherinformationreferto
pervisorconfiguration,thestatusoftheantennasupervisorwillbereportedinaNMEA
($GPTXT)orUBX(INF-NOTICE)messageatstart-upandoneverychange.
Note Toactivatethe
®
the ANTARIS
4 Protocol Specifications [9].
Similartotheantennasu
Message Description
ANTSTATUS=DONTKNOW

Activeantennasupervisorisnotconfiguredanddeactivated.
ANTSTATUS=OK Activeantennaconnectedandpowered
ANTSTATUS=SHORT Antennashort
ANTSTATUS=OPEN Antennanotconnectedorantennadefective
T Antenna Supervisor M p (NMEA protocol)
 Note Theopencircuitsuper tmay
be reduced with an  circuitry, which fulfils the same function as the u-blox suggested
4.4 Serial Communication
The ANTARIS 4 GPS Technology comes with a highly flexible communication interface. It supports both the
and
a
severalports
withindividualsettings(e.g.baudrate,messagesenabled,
etc.)foreachport.Itisevenpossibletoassignmorethanoneprotocol(e.g.UBXprotocolandNMEA)toasingle
teaprotocol (UBX,NMEA,RTCM)
onaportandUBX-CFG(Config)–MSG(Message)toactivateaspecificmessageonaserialportanddefinethe
outputrate (seeANTARIS
®
4GPS Protocol Specifications [9]).Every protocolcan beactivatedonseveralports if
required.
4.4.1 USART Ports
All TIM-4x, LEA-4S and LEA-4A receivers feature two u
able 21: Active essage on startu
visorcircuitryhasaquiescentcurrentofapproximately2mA.Thiscurren
advanced
circuitry.
®
NMEA  the proprietary UBX protocol and is able to accept differential correction data (RTCM). It is truly
multi-port ndmulti-protocolcapable.Each protocol (UBX,NMEA,RTCM, customprotocol)canbe assignedto
atthe
sametime(multi-portcapability)
port(multi-protocolcapability),whichisparticularlyusefulfordebuggingpurposes.
Usethe UBXproprietarymessagesUBX
–CFG (Config)–PRT(Port)toactiva
niversal synchronous/asynchronous receiver/transmitters
(USART) ports (RxD1/TxD1 and RxD2/TxD2) that can be used to transmit GPS measurements, monitor status
informationandconfigurethereceiver.AllLEA-4P,LEA-4HandLEA-4TreceiverfeatureoneUSARTandoneUSB
UsingthefollowingfunctionsoftheserialportrequirestheANTARIS
®
4 Software Customization Kit:
K0SCK1 andSCK2 assynchronousserialclocks.
• SPIInterface
Allserialinterfacesignals(Port1:TxD1,RxD1;Port2:TxD2,RxD2)operateon3VCMOSsignallevels.External
linetransceiversarenecessarytoprovideRS232compatiblesignallevels.
Theserialports
consistof aRX-and aTXline.No handshaking- orhardware flowcontrol signalsareavailable.
Theseserialportsoperateinasynchronousmode.SupportedBaudRatesare:
serialport.
• SynchronousserialinterfacingusingtheadditionalpinsSC
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
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