Appendix d: programming the lcm, Appendix d, Programming the lcm – Lanner FW-7610 User Manual

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Programming the LCM

Appendix D

Network Application Platforms

Appendix D:

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 kind of LCM:

Parallel Text-based LCM: The LCM connects to the

•

motherboard’s parallel port. The LCD screen can

display 2 lines, 16 (or 20) characters per line.

For Parallel Text-based LCM

Build
To build program source code on Linux platform, use the

following steps as a guideline:

Copy the proper makefile from the Driver and Manual

CD to your system: Makefile.linux
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.