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4.2 Communication Parameters Set up
You may set up communication parameters by
hardware configuration file, which will be executed when
system is booted. However, you can set up communication parameters
at run time by use SETUP command. The syntax specification
of SETUP is
SETUP [/v,]portno,[baud,parity,data,stop][,MC=ms][,FC=fs]
The default parameters are baud=9600, parity=N, data=8, stop=1, no MODEM control and flow control.
/v
Verbose. List all
setting parameters.
After serial ports
are setup, system will check
whether the specified port is good,
if the corresponding
port is bad, system
will prompt ???? to notice user.
portno
Specifies which
port is control by PCCOM device driver.
baud
Baud rate. You may key in any baud rate, the device driver will
adjust your baud rate to desire
baud rate that the serial port
can accept. If you key in 65535 baud, this means 115200. According to our test, The PCCOM device driver can accept up to
115200 baud under 8m cable.
parity
Parity bit. N : none parity,
E : even parity,
O
: odd parity.
data
Data bits. 5 : five data bits,
6
: six data bits,
7
: seven data bits,
8
: eight data bits.
stop
Stop bits. 1 : one stop bit,
2
: two stop bits.
MC=ms
Select Modem Control Register. Multiple
protocol will
be selected, which are DTR, RTS, OUT1, OUT2. NONE means ignore.
FC=fs
Select hardware
or software
handshaking. Multiple protocol are selected which are DTR, RTS, and XON. NONE means ignore.
The following examples
are provided to help clarify the use
of the SETUP command.
EXAMPLE
4.2.1
A> SETUP 1,MC=DTR+RTS+OUT2
To setup I/O port
1. It set DTR, RTS,
and OUT2 bits of modem control register,
the default parameters are
baud
rate=9600, parity=N, data bits=8, stop bits=1, flow control
is none.
EXAMPLE
4.2.2
A> SETUP /v,2,9600,E,8,2,MC=DTR+RTS,
FC=XON
To setup I/O port 2. Its
handshaking protocol is XON/XOFF,
baud rate is
9600, parity check is even,
data bits is 8, stop
bits is 2, modem control register is DTR+RTS. After I/O ports
are setup, system lists all setting parameters.
EXAMPLE 4.2.3
A> SETUP
0,FC=XON
To setup I/O port 0. Its
handshaking protocol is XON/XOFF. Baud rate =9600, parity
check is none, data bits is 8, stop bits is 1, MC is none.
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