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keys.cpp

/*------------------------------------------------------------------------------
      $Id$

      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: keys.c,v $
      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/scummvm_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)

namespace DS {

static uint16 keys = 0;
static uint16 keysold = 0;
static uint16 keysrepeat = 0;

static u8 delay = 60, repeat = 30, count = 60;

static uint16 oldx = 0;
static uint16 oldy = 0;

void scanKeys(void) {
      keysold = keys;
      keys = KEYS_CUR;

      oldx = IPC->touchXpx;
      oldy = IPC->touchYpx;
    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);
}


}     // End of namespace DS


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