Unitech PA500 Manuel d'utilisateur télécharger pdf (Page 27)

6.4. LCD/Backlight related function

There are two backlight controls, screen backlight and keypad backlight. They are

controlled separately. For screen backlight, you can adjust brightness of backlight also.

6.4.1. Screen Backlight Control

Function Description:

This function turns screen backlight on or off.

Function call:

void BacklightOn(BOOL fON)

Parameter(Input)

fON: BOOL: TRUE = turn on screen backlight.

FALSE= turn off backlight.

Return code:

6.4.2. Get Screen Backlight Status

Function Description:

This function returns the status of screen backlight.

Function call:

BOOL GetBacklightStatus(void)

Return code:

TRUE = screen backlight is on.

FALSE = screen backlight is off.

6.4.3. Screen Backlight Brightness Control

Function Description:

This function adjusts screen backlight brightness.

Function call:

void BrightnessUp(BOOL fup)

Parameters(Input)

Fup: BOOL: TRUE = adjust one step up.

FALSE = adjust one step down.

Return code:

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Unitech PA500 Manuel d'utilisateur Page 27