User`s manual

UC-7112-LX Plus Software User’s Manual Getting Started
2-15
NOTE Use the
kill -9 command for PID 728 to terminate this program: #kill -9 %728
Summary of Testing Procedure
1. Compile tcps2.c (#make ).
2. Upload and run tcps2-release in the background
(#./tcps2-release &) .
3. Check that the process is running
(#jobs or #ps -ef) .
4. Use a serial cable to connect PC1 to the UC-7112-LX Plus’s serial port 1.
5. Use an Ethernet cable to connect PC2 to the UC-7112-LX Plus.
6. On PC1: If running Windows, use HyperTerminal (38400, n, 8, 1) to open COMn.
7. On PC2: Type
#telnet 192.168.3.127 4001 .
8. On PC1: Type some text on the keyboard and then press Enter.
9. On PC2: The text you typed on PC1 will appear on PC2’s screen.
The testing environment is illustrated in the following figure. However, note that there are
limitations to the example program tcps2.c.
tcps2.c
RS-232 LAN
PC 2PC 1
Write data to PC1
Receive LAN data
Read serial data
Send data to PC2
Serial Rx
Buffer
LAN Rx
Buffer
1P 2P
XT
XR
1P 2P
XT
XR
ydaeR
+V TESER
V84-21
1NAL
584/224/232-SR
2NAL
0117-CU
rotacinummoC lasrevinU
NOTE The tcps2.c application is a simple example designed to give users a basic understanding of the
concepts involved in combining Ethernet communication and serial port communication.
However, the example program has some limitations that makes it unsuitable for real-life
applications.
1. The serial port is in canonical mode and block mode, making it impossible to send data from
the Ethernet side to the serial side (i.e., from PC 2 to PC 1 in the above example).
2. The Ethernet side will not accept multiple connections.