Novatel OM-20000041 用户手册

C 

Commands Summary

84

 MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

This command permits you to configure the GPSCard 

COM

 port’s asynchronous drivers.

com2 19200,e,7,1,n,on,off

com1 1200,e,8,1,n,on,off

Your GPSCard comes configured this way. If you have different parameters you should reconfigure the 

communication protocol as per requirements.

This command enables versatile control of the 

DTR

 handshake line for use with output data logging in conjunction

with external devices such as a radio transmitter.  The default state for the 

COM1

 or 

COM2

 

DTR

 line is always high.

com1_dtr toggle,high,300,150

com2_dtr toggle,low,200,110

COMn 

bps

parity

databits

stopbits

handshake

echo

FIFO

COMn

n = 1 or 2

Specify COM port

com2

bps

300, 600, 1200, 2400, 4800, 9600, 19200, 
38400, 57600 or 115,200

Specify bit rate

9600

19200

parity

N (none), O (odd) or E (even)

Specify parity

N

E

databits

7 or 8

Specify number of data bits

8

7

stopbits

1 or 2

Specify number of stop bits

1

1

handshake

N (none), XON (Xon/Xoff) or CTS (CTS/RTS)

Specify handshaking

N

N

echo

ON or OFF

Specify echo

OFF

ON

FIFO

ON or OFF

Transmit the First In First Out queue of the 
GPSCard’s serial port UART.

ON

OFF

COMn_DTR 

control

active

[lead]

[tail]

COMn_DTR

n = 1 or 2

Selects COM1 or COM2 port

com1_dtr

control

high

control is always high

high

toggle

low

control is always low

toggle

control toggles between high and low
(active, lead, and tail fields are TOGGLE options only)

active

high

data available during high

n/a

high

low

data available during low

lead

variable

lead time before data transmission (milliseconds)

n/a

300

tail

variable

tail time after data transmission (milliseconds)

n/a

150