Lanner FW-8759, User Manual

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:

Copy the proper makefile from the Driver and Manual 

1. 

CD to your system: Makefile.linux 
Type make to build source code:

2. 

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: 

This program runs through the following 

functions in sequence:

Backlight Off/On 

(turning off/on the backlight of the 

LCM display)

Display Off/On

 (turning off /on the LCM display)

Cursor Off/On 

(NOT showing/showing the cursor on the 

LCM display)

Blinking off/On 

(turning off/on the cursor blinking)

Writing Lanner@Taiwan 

(displaying the specific 

sentences)

Reading Lanner@Taiwan 

(reading the specific sentence)

CGram Test 

(displaying the user-stored characters)

Keypad Testing 

(Get the keypad inuput: the 1st button 

is read in as left, the 2nd buttonis read in as up, the 3rd 

button is read in as down, and the 4th button is read in 

as right)

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.