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/*! \file include/dkey.h
\brief Interface: debounced key driver
\author Markus L. Noga <markus@noga.de>
*/
/*
* 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 __dkey_h__
#define __dkey_h__
#ifdef __cplusplus
extern "C" {
#endif
#include <config.h>
#ifdef CONF_DKEY
#include <tm.h>
///////////////////////////////////////////////////////////////////////
//
// Definitions
//
///////////////////////////////////////////////////////////////////////
#define KEY_ONOFF 0x01 //!< the on/off key is pressed
#define KEY_RUN 0x02 //!< the run key is pressed
#define KEY_VIEW 0x04 //!< the view key is pressed
#define KEY_PRGM 0x08 //!< the program key is pressed
#define KEY_ANY 0x0f //!< any of the keys
///////////////////////////////////////////////////////////////////////
//
// Variables
//
///////////////////////////////////////////////////////////////////////
//! the currently active keys
/*! this is a bitmask - multi-key combinations are admissible.
*/
extern volatile unsigned char dkey_multi;
//! the current key
/*! this is not a bitmask - at most one key at a time.
*/
extern volatile unsigned char dkey;
///////////////////////////////////////////////////////////////////////
//
// Functions
//
///////////////////////////////////////////////////////////////////////
//! wakeup if any of the given keys is pressed.
//
extern wakeup_t dkey_pressed(wakeup_t data);
//! wakeup if all of the given keys are released.
//
extern wakeup_t dkey_released(wakeup_t data);
//! wait for keypress and return key code.
/*! key combinations not admissible.
*/
extern int getchar();
#endif // CONF_DKEY
#ifdef __cplusplus
}
#endif
#endif // __dkey_h__
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