RUN TIME SUPPORT

4.1 How To Use Device   

After  device driver is  installed,  you may use device name  as a file to perform I/O operations. 

To  send  file  to  the  COM4 port,  the command is shown in the following. 

A>copy filename COM4 

To receive file from the COM5 port,  the command is shown as 

A>copy COM5 filename  

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.   

4.3 Setup and Status Report 

You may change communication parameters, reset some communication flags or check the status of serial port by  execute  MODESET program,  which is used  interactively.  When you execute the MODESET program,  you  only need  to specify device name which you  need, then modify communication parameters by arrow key to select the corresponding field.  

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