Introduction

Some people have been asking for the code to control the wii's light so here it is.

It's more of an example for anyone to understand what is going on.

It tricks your eyes into thinking you are seeing changes in light intensity, but actually it is just being turned on and off too quickly.

Whatever, here it comes the example.

The Download!

The source and compiled .dol for those who want. wiilight_source.zip

The code!

#include <stdio.h>
#include <stdlib.h>
#include <ogcsys.h>
#include <wiiuse/wpad.h>

struct timespec _wiilight_timeOn;
struct timespec _wiilight_timeOff;

int WIILIGHT_IsOn;
int WIILIGHT_Level;

void _wiilight_turn(int enable);
static void * _wiilight_loop(void *arg);
static vu32 *_wiilight_reg = (u32*)0xCD0000C0;
lwp_t _wiilight_thread;


void WIILIGHT_Init();
void WIILIGHT_TurnOn();
int WIILIGHT_GetLevel();
int WIILIGHT_SetLevel(int level);

void WIILIGHT_Toggle();
void WIILIGHT_TurnOff();

static void *xfb = NULL;
static GXRModeObj *rmode = NULL;

void WIILIGHT_Init(){
	_wiilight_timeOn.tv_sec=(time_t)0;
	_wiilight_timeOff.tv_sec=(time_t)0;
	WIILIGHT_IsOn=0;
	WIILIGHT_SetLevel(0);
}


int WIILIGHT_GetLevel(){
	return WIILIGHT_Level;
}

//
// here is where we set the light intensity
// it turns on the light and 
// waits level*40000 nanoseconds
// (so, if it is 255 it will wait for 10200000 nanoseconds) 
// (that means ~ 1/100secs)
// 
// for the time turned off it is 10200000-level_on
// (so, if level is 255, it will wait for 0 seconds)
// (that means full light intensity)
//

int WIILIGHT_SetLevel(int level){//0 to 255
	long level_on;
	long level_off;
	if(level>255) level=255;
	if(level<0) level=0;
	level_on=level*40000;
	level_off=10200000-level_on;
	_wiilight_timeOn.tv_nsec=level_on;
	_wiilight_timeOff.tv_nsec=level_off;
	WIILIGHT_Level=level;
	return level;
}

//
// just turn one bit
//

void _wiilight_turn(int enable){
	u32 val = (*_wiilight_reg&~0x20);
	if(enable) val |= 0x20;
	*_wiilight_reg=val;
}

void WIILIGHT_TurnOff(){
	
	WIILIGHT_IsOn=false;
	
}

//
// Set the var on, and start the looping thread
//

void WIILIGHT_TurnOn(){
	
	WIILIGHT_IsOn=true;
	LWP_CreateThread(&_wiilight_thread, _wiilight_loop,NULL,NULL,0,80);
	
}

void WIILIGHT_Toggle(){
	
	if(WIILIGHT_IsOn){
		WIILIGHT_TurnOff();
	}else{
		WIILIGHT_TurnOn();
	}
	
}

// 
// This is the looping thread.. it just loops
// turning on and off the light depending on the timing
// specified by SetLevel()
//

static void * _wiilight_loop(void *arg){
	
	struct timespec timeOn;
	struct timespec timeOff;
	while(WIILIGHT_IsOn){
		timeOn=_wiilight_timeOn;
		timeOff=_wiilight_timeOff;
		_wiilight_turn(1);
		nanosleep(&timeOn);
		if(timeOff.tv_nsec>0) _wiilight_turn(0);
		nanosleep(&timeOff);
	}
	
	return NULL;
	
}

int main(int argc, char **argv) {
	
	VIDEO_Init();
	WPAD_Init();
	
	rmode = VIDEO_GetPreferredMode(NULL);
	
	xfb = MEM_K0_TO_K1(SYS_AllocateFramebuffer(rmode));

	console_init(xfb,20,20,rmode->fbWidth,rmode->xfbHeight,rmode->fbWidth*VI_DISPLAY_PIX_SZ);
	VIDEO_Configure(rmode);
	VIDEO_SetNextFramebuffer(xfb);
	VIDEO_SetBlack(FALSE);
	VIDEO_Flush();
	VIDEO_WaitVSync();
	if(rmode->viTVMode&VI_NON_INTERLACE) VIDEO_WaitVSync();

	printf("Invisible Line... can't be seen on my tv! O: n");
	printf("Starting fading effect :D ...n");
	
	//
	// we set the initial values about timing
	//
	WIILIGHT_Init();
	
	//
	//	with this we start the loop
	//
	WIILIGHT_TurnOn();
	
	int i=0;
	int dir=2;
	while(1) {
		
		
		if(i>255){
			i=255;
			dir=-2;
		}
		if(i<0){
			i=0;
			dir=2;
		}
		printf("Level: %d        r",i);
		
		//
		// we set the Level of intensity (0 to 255)
		//
		
		WIILIGHT_SetLevel(i);
		
		i+=dir;
		
		WPAD_ScanPads();
		u32 pressed = WPAD_ButtonsDown(0);
		
		if(pressed & WPAD_BUTTON_HOME) exit(0);
		
		VIDEO_WaitVSync();
		
		
	}

	return 0;
	
}