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Sample - Keyboard Library

• Changes
• Library Description
• Library API

• V2.10 : Initial revision
• V3.00 : No changes

This Keyboard sample ADL Library provides allows ADL applications to receive keyboard events.

All constants and APIs are defined by the keyboard.h header file, which must be included by any application to allows it to use the Keyboard Library.

The library will need the global variable bellow on link operation, to define the trace level on which will be displayed the Keyboard traces :

extern u8 key_TraceLevel;

The Keyboard APIs are defined bellow :

void  key_Subscribe ( key_Handler_f  KeyHandler, u32  RepeatTickTime, u32  RepeatTickDelay );  
 


Parameter	Description
KeyHandler	keyboard handler, to reveive key-pressed and key-released events. (see bellow).
RepeatTickTime	after a key is pressed, key-pressed events are repeated each RepeatTickTime ticks period.
RepeatTickDelay	the repeated events are generated after a RepeatTickDelay ticks delay.

typedef  void ( * key_Handler_f ) ( u8  Key, u8  Pressed );  
 


Parameter	Description
Key	Pressed or released key code
Pressed	on 0 : key released event on 1 : key pressed event

void  key_Unsubscribe ( key_Handler_f  KeyHandler );  
 


Parameter	Description
KeyHandler	subscribed keyboard handler.

Updated: Wed Apr 4 13:14:25 CEST 2007;