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/*! \file include/dbutton.h
\brief Interface: query raw button states
\author Markus L. Noga <markus@noga.de>
\warning this is raw, unprocessed input. buttons will bounce.
please use dkey functions instead.
*/
/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* The Original Code is legOS code, released October 17, 1999.
*
* The Initial Developer of the Original Code is Markus L. Noga.
* Portions created by Markus L. Noga are Copyright (C) 1999
* Markus L. Noga. All Rights Reserved.
*
* Contributor(s): Markus L. Noga <markus@noga.de>
*/
#ifndef __dbutton_h__
#define __dbutton_h__
#ifdef __cplusplus
extern "C" {
#endif
///////////////////////////////////////////////////////////////////////////////
//
// Definitions
//
///////////////////////////////////////////////////////////////////////////////
#define BUTTON_ONOFF 0x0002 //!< the on/off button
#define BUTTON_RUN 0x0004 //!< the run button
#define BUTTON_VIEW 0x4000 //!< the view button
#define BUTTON_PROGRAM 0x8000 //!< the program button
// buttons are active low
//
//! true if any of the specified buttons is released
//
#define RELEASED(state,button) ((state) & (button))
//! true if all of the specified buttons are pressed
//
#define PRESSED(state,button) (!RELEASED(state,button))
///////////////////////////////////////////////////////////////////////////////
//
// Functions
//
///////////////////////////////////////////////////////////////////////////////
//! get button states
/*! masks as defined above
*/
extern inline int dbutton(void)
{
int rv;
__asm__ __volatile__("\n\
mov.b @_PORT4,%0l\n\
mov.b @_PORT7,%0h\n\
" :"=r"(rv) // output
: // input
:"cc" // clobbered
);
return rv;
}
#ifdef __cplusplus
}
#endif
#endif // __dbutton_h__
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