events.c File Reference

Handles wiimote events. More...

#include <stdio.h>
#include <sys/time.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <stdlib.h>
#include <math.h>
#include "definitions.h"
#include "io.h"
#include "wiiuse_internal.h"
#include "dynamics.h"
#include "ir.h"
#include "nunchuk.h"
#include "classic.h"
#include "guitar_hero_3.h"
#include "events.h"

Include dependency graph for events.c:

Macros
#define	STATE_CHANGED(a, b)   if (a != b) return 1
#define	CROSS_THRESH(last, now, thresh)
#define	CROSS_THRESH_XYZ(last, now, thresh)

Functions
int	wiiuse_poll (struct wiimote_t **wm, int wiimotes)
	Poll the wiimotes for any events. More...
void	wiiuse_pressed_buttons (struct wiimote_t *wm, byte *msg)
	Find what buttons are pressed. More...
void	handshake_expansion (struct wiimote_t *wm, byte *data, unsigned short len)
	Handle the handshake data from the expansion device. More...
void	disable_expansion (struct wiimote_t *wm)
	Disable the expansion device if it was enabled. More...

Detailed Description

Handles wiimote events.

The file includes functions that handle the events that are sent from the wiimote to us.

Macro Definition Documentation

CROSS_THRESH

#define CROSS_THRESH	(		last,
			now,
			thresh
	)

Value:

do {                                                            \
                    if (WIIMOTE_IS_FLAG_SET(wm, WIIUSE_ORIENT_THRESH)) {        \
                        if ((diff_f(last.roll, now.roll) >= thresh) ||          \
                            (diff_f(last.pitch, now.pitch) >= thresh) ||        \
                            (diff_f(last.yaw, now.yaw) >= thresh))              \
                        {                                                       \
                            last = now;                                         \
                            return 1;                                           \
                        }                                                       \
                    } else {                                                    \
                        if (last.roll != now.roll)      return 1;               \
                        if (last.pitch != now.pitch)    return 1;               \
                        if (last.yaw != now.yaw)        return 1;               \
                    }                                                           \
                } while (0)

CROSS_THRESH_XYZ

#define CROSS_THRESH_XYZ	(		last,
			now,
			thresh
	)

Value:

do {                                                            \
                    if (WIIMOTE_IS_FLAG_SET(wm, WIIUSE_ORIENT_THRESH)) {        \
                        if ((diff_f(last.x, now.x) >= thresh) ||                \
                            (diff_f(last.y, now.y) >= thresh) ||                \
                            (diff_f(last.z, now.z) >= thresh))                  \
                        {                                                       \
                            last = now;                                         \
                            return 1;                                           \
                        }                                                       \
                    } else {                                                    \
                        if (last.x != now.x)        return 1;                   \
                        if (last.y != now.y)        return 1;                   \
                        if (last.z != now.z)        return 1;                   \
                    }                                                           \
                } while (0)

Function Documentation

disable_expansion()

void disable_expansion

(

struct wiimote_t *

wm

)

Disable the expansion device if it was enabled.

Parameters

wm	A pointer to a wiimote_t structure.
data	The data read in from the device.
len	The length of the data block, in bytes.

If the data is NULL then this function will try to start a handshake with the expansion.

handshake_expansion()

void handshake_expansion	(	struct wiimote_t *	wm,
		byte *	data,
		unsigned short	len
	)

Handle the handshake data from the expansion device.

Parameters

wm	A pointer to a wiimote_t structure.
data	The data read in from the device.
len	The length of the data block, in bytes.

Tries to determine what kind of expansion was attached and invoke the correct handshake function.

If the data is NULL then this function will try to start a handshake with the expansion.

wiiuse_poll()

int wiiuse_poll	(	struct wiimote_t **	wm,
		int	wiimotes
	)

Poll the wiimotes for any events.

Parameters

wm	An array of pointers to wiimote_t structures.
wiimotes	The number of wiimote_t structures in the wm array.

Returns

Returns number of wiimotes that an event has occurred on.

It is necessary to poll the wiimote devices for events that occur. If an event occurs on a particular wiimote, the event variable will be set.

wiiuse_pressed_buttons()

void wiiuse_pressed_buttons	(	struct wiimote_t *	wm,
		byte *	msg
	)

Find what buttons are pressed.

Parameters

wm	Pointer to a wiimote_t structure.
msg	The message specified in the event packet.