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/*------------------------------------------------------------------------------
$Id$
key input code -- provides slightly higher level input forming
Copyright (C) 2005
Christian Auby (DesktopMan)
Dave Murphy (WinterMute)
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
$Log$
Revision 1.15 2006/07/04 01:45:31 wntrmute
remove unused variables
Revision 1.14 2006/07/02 17:36:51 wntrmute
remove unnecessary IPC reads
Revision 1.13 2006/01/12 09:10:47 wntrmute
Added key repeat as suggested by pepsiman
Revision 1.12 2005/11/27 12:30:25 wntrmute
reverted to correct hardware REGisters
Revision 1.11 2005/11/27 07:48:45 joatski
Renamed REG_KEYINPUT and REG_KEYCNT back to KEYS and KEYS_CR, as the alternatives are defined in registers_alt.h.
Changed function returns to uint32
Revision 1.10 2005/11/03 23:38:49 wntrmute
don't use enum for key function returns
Revision 1.9 2005/10/13 16:30:11 dovoto
Changed KEYPAD_BITS to a typedef enum, this resolved some issues with multiple redefinition of KEYPAD_BITS (although this error did not allways occur).
Revision 1.8 2005/10/03 21:21:59 wntrmute
use enum types
Revision 1.7 2005/09/07 18:06:27 wntrmute
use new register names
Revision 1.6 2005/08/23 17:06:10 wntrmute
converted all endings to unix
Revision 1.5 2005/08/03 18:07:55 wntrmute
don't use nds.h
Revision 1.4 2005/07/25 02:31:07 wntrmute
made local variables static
added proper header to keys.h
Revision 1.3 2005/07/25 02:19:01 desktopman
Added support for KEY_LID in keys.c.
Moved KEYS_CUR from header to source file.
Changed from the custom abs() to stdlib.h's abs().
Revision 1.2 2005/07/14 08:00:57 wntrmute
resynchronise with ndslib
------------------------------------------------------------------------------*/
#include <stdlib.h>
#include <nds/ipc.h>
#include <nds/system.h>
#include <nds/arm9/input.h>
//------------------------------------------------------------------------------
#define KEYS_CUR (( ((~REG_KEYINPUT)&0x3ff) | (((~IPC->buttons)&3)<<10) | (((~IPC->buttons)<<6) & (KEY_TOUCH|KEY_LID) ))^KEY_LID)
static uint16 keys = 0;
static uint16 keysold = 0;
static uint16 keysrepeat = 0;
static u8 delay = 60, repeat = 30, count = 60;
//------------------------------------------------------------------------------
void scanKeys(void) {
//------------------------------------------------------------------------------
keysold = keys;
keys = KEYS_CUR;
if ( delay != 0 ) {
if ( keys != keysold ) {
count = delay ;
keysrepeat = keysDown() ;
}
count--;
if ( count == 0 ) {
count = repeat;
keysrepeat = keys;
}
}
}
//------------------------------------------------------------------------------
uint32 keysHeld(void) {
//------------------------------------------------------------------------------
return keys;
}
//------------------------------------------------------------------------------
uint32 keysDown(void) {
//------------------------------------------------------------------------------
return (keys ^ keysold) & keys;
}
//------------------------------------------------------------------------------
uint32 keysDownRepeat(void) {
//------------------------------------------------------------------------------
uint32 tmp = keysrepeat;
keysrepeat = 0;
return tmp;
}
//------------------------------------------------------------------------------
void keysSetRepeat( u8 setDelay, u8 setRepeat ) {
//------------------------------------------------------------------------------
delay = setDelay ;
repeat = setRepeat ;
count = delay ;
keysrepeat = 0 ;
}
//------------------------------------------------------------------------------
uint32 keysUp(void) {
//------------------------------------------------------------------------------
return (keys ^ keysold) & (~keys);
}
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