Argox PA-20 Programming Guide Bedienungsanleitung PDF herunterladen (Seite 70)

PT-20 Programming Guide

Returns：

None

get_keypad_BL_Timer

Purpose：

Get keypad backlight timer.

Syntax：

int get_keypad_BL_Timer(void);

Example call：

int slkeypadimer;

slkeypadimer = get_keypad_BL_Timer();

Includes：

#include “SDK.h ”

Description：

This function can get keypad backlight timer.

Returns：

0: Keypad backlight always on

Other: The timer for keypad backlight(sec.).

kbhit

Purpose：

Check keybuffer is empty or not.

Syntax：

int kbhit(void);

Example call：

kbhit();

Includes：

#include “SDK.h ”

Description：

This function can check keybuffer is empty or not.

Returns：

0: Keybuffer is empty.

1: Keybuffer is not empty.

_getchar

Purpose：

Get one key stroke from the keyboard buffer.

Syntax：

char _getchar(void);

Example call：

c=_getchar ( );

if (c > 0) _printf(“Key %d pressed”,c);

else printf(“No key pressed”);

Includes：

#include “SDK.h ”

Description：

The getchar function reads one key stroke from the keyboard buffer and

then removes the key stroke from the keyboard buffer. It will pass the

value back, and clear the buffer. If there is no any key press before, it will

pass NULL(0X00) back.

Returns：

The getchar function returns the key stroke read from the keyboard

buffer. If the keyboard buffer is empty, a null character (0x00) is returned.

The keystroke returned is the ASCII code of the key being pressed.

GetKeyClick

Purpose：

Get current key click status

Syntax：

int GetKeyClick(void);

Example call：

state = GetKeyClick( );

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