3
5
Programming the LCM
Network Application Platforms
Appendix C
Programming the LCM
The LCD panel module (LCM) is designed to provide real-
time operating status and configuration information for
the system. For sample LCM code, see
LCM
foler in the
Driver and Manual CD
. The driver and the program library
can also be found in the folder.
The system supports the following type of LCM:
•
Parallel Text-based LCM: The LCM connects to the
motherboard’s parallel port. The LCD screen can
display 2 lines, 20 characters per line.
Parallel Text-based LCM
Build
To build program source code on Linux platform, use the
following steps as a guideline:
1. Copy the proper makefile from the Driver and Manual
CD to your system: Makefile.linux
2. Type make to build source code:
make Makefile (Note: omit the file extensions)
After compiled, the executable programs
(plcm_test,
plcm_cursor_char, Test) and the driver (plcm_drv.ko or
plcm_drv.o) will appear in the program’s folder.
Note:
The OS supported by Lanner Bypass
function include platforms based on Linux Kernel
series 2.4.x and Linux Kernel series 2.6.x.
Install
Install the driver and create a node in the /dev directory
by:
#insmod plcm_drv.ko
#mknod /dev/plcm_drv c 241 0
Note:
If you cannot install the driver, check
whether you have enabled the parallel port in the
BIOS setting .
Execution
This section contains sample executable programs that
you could test on your platform. It demonstrates some
useful functionality that the LCM provides.
To execute, type:
#./plcm_test
Plcm_cursor_char.
This program provides a menu to
demonstrate the following functions:
Insert line
(set the starting line to either line 1 or line 2)
Move Cursor right
(select to move the cursor to the
right)
Move Cursor Left
(select to move the cursor to the left)
Add a char
(select to display a character on the LCM
screen)
Clear
(select to clear the LCM display)
Leave
(select to leave the program)
To execute, type:
#./ plcm_cursor_char
Note:
For descriptions of the command, refer to
the Readme file contained within the program’s
folder.
