ET-314AC
High Performance GPS Engine Board
2010/4/1
- 14 -
NMEA Input Command
A). Set Serial Port ID: 100 Set PORTA parameters and protocol
This command message is used to set the protocol (SiRF Binary or NMEA) and/or the
communication parameters (baud rate, data bits, stop bits, and parity). Generally, this command
is used to switch the module back to SiRF Binary protocol mode where a more extensive
command message set is available. When a valid message is received, the parameters are stored
in battery-backed SRAM and the receiver will resumes using the saved parameters.
Table B-1 contains the input values for the following example:
Switch to SiRF binary protocol at 9600,8,N,1
$PSRF100,0,9600,8,1,0*0C
Table B-1 Set serial Port Data Format
Name Example
Units
Description
Message ID
$PSRF100
PSRF100 protocol header
Protocal
0
0=SiRF Binary, 1=NMEA
Baud
9600
1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
DataBits
8
8,7. Note that SiRF protocol is only valid for 8 Data bits
StopBits 1
0,1
Parity
0
0=None, 1=Odd, 2=Even
Checksum *0C
<CR><LF>
End of message termination
