dkey.h File Reference

Interface: debounced key driver. More...

#include <config.h>
#include <tm.h>

Include dependency graph for dkey.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#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

Functions
wakeup_t	dkey_pressed (wakeup_t data)
	wakeup if any of the given keys is pressed.
wakeup_t	dkey_released (wakeup_t data)
	wakeup if all of the given keys are released.
int	getchar ()
	wait for keypress and return key code.

Variables
volatile unsigned char	dkey_multi
	the currently active keys
volatile unsigned char	dkey
	the current key

Detailed Description

Interface: debounced key driver.

Author

Markus L. Noga marku.nosp@m.s@no.nosp@m.ga.de

Definition in file dkey.h.

Macro Definition Documentation

KEY_ANY

#define KEY_ANY   0x0f

any of the keys

Definition at line 49 of file dkey.h.

KEY_ONOFF

#define KEY_ONOFF   0x01

the on/off key is pressed

Definition at line 44 of file dkey.h.

KEY_PRGM

#define KEY_PRGM   0x08

the program key is pressed

Definition at line 47 of file dkey.h.

KEY_RUN

#define KEY_RUN   0x02

the run key is pressed

Definition at line 45 of file dkey.h.

KEY_VIEW

#define KEY_VIEW   0x04

the view key is pressed

Definition at line 46 of file dkey.h.

Function Documentation

dkey_pressed()

wakeup_t dkey_pressed ( wakeup_t  data )

extern

wakeup if any of the given keys is pressed.

dkey_released()

wakeup_t dkey_released ( wakeup_t  data )

extern

wakeup if all of the given keys are released.

getchar()

int getchar ( )

extern

wait for keypress and return key code.

key combinations not admissible.

Variable Documentation

dkey

volatile unsigned char dkey

extern

the current key

this is not a bitmask - at most one key at a time.

dkey_multi

volatile unsigned char dkey_multi

extern

the currently active keys

this is a bitmask - multi-key combinations are admissible.