get wiiRemote IR point problem

[silenceburn]

hello brother
I use the latest release of libogc (080603),
and when I use the wiiuse lib , I met some trouble here.

I want to get IR point ,but every time call function WPAD_ReadEvent(0, &wpads),
I got zero from dot[0].rx and dot[0].ry , the same as the other 3 LED.
I dont know what's wrong happened , please refer below code,thanks a lot!

Code: Select all

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

static void *xfb = NULL;
static GXRModeObj *rmode = NULL;
static WPADData wpads;
static int activeDot;

//---------------------------------------------------------------------------------
int main(int argc, char **argv) {
//---------------------------------------------------------------------------------

	// Initialise the video system
	VIDEO_Init();
	
	// This function initialises the attached controllers
	WPAD_Init();
	
  	
	// Obtain the preferred video mode from the system
	// This will correspond to the settings in the Wii menu
	rmode = VIDEO_GetPreferredMode(NULL);

	// Allocate memory for the display in the uncached region
	xfb = MEM_K0_TO_K1(SYS_AllocateFramebuffer(rmode));
	
	// Initialise the console, required for printf
	console_init(xfb,20,20,rmode->fbWidth,rmode->xfbHeight,rmode->fbWidth*VI_DISPLAY_PIX_SZ);
	
	// Set up the video registers with the chosen mode
	VIDEO_Configure(rmode);
	
	// Tell the video hardware where our display memory is
	VIDEO_SetNextFramebuffer(xfb);
	
	// Make the display visible
	VIDEO_SetBlack(FALSE);

	// Flush the video register changes to the hardware
	VIDEO_Flush();

	// Wait for Video setup to complete
	VIDEO_WaitVSync();
	if(rmode->viTVMode&VI_NON_INTERLACE) VIDEO_WaitVSync();


	// The console understands VT terminal escape codes
	// This positions the cursor on row 2, column 0
	// we can use variables for this with format codes too
	// e.g. printf ("\x1b[%d;%dH", row, column );
	printf("\x1b[2;0H");
	

	printf("Hello World!");

	WPAD_SetDataFormat(0,WPAD_FMT_BTNS_ACC_IR);
	int irX1point = 0;
	int irY1point = 0;
	int irX2point = 0;
	int irY2point = 0;
	int irX3point = 0;
	int irY3point = 0;
	int irX4point = 0;
	int irY4point = 0;
		
        

	while(1) {

		// Call WPAD_ScanPads each loop, this reads the latest controller states
		WPAD_ScanPads();
		WPAD_ReadEvent(0, &wpads);
		// WPAD_ButtonsDown tells us which buttons were pressed in this loop
		// this is a "one shot" state which will not fire again until the button has been released
			
	
		irX1point = wpads.ir.dot[0].rx;
		irY1point = wpads.ir.dot[0].ry;
		irX1point = wpads.ir.dot[1].rx;
		irY1point = wpads.ir.dot[1].ry;
		irX1point = wpads.ir.dot[2].rx;
		irY1point = wpads.ir.dot[2].ry;
		irX1point = wpads.ir.dot[3].rx;
		irY1point = wpads.ir.dot[3].ry;
		
			
		
		printf("X1:%d, Y1:%d, X2:%d, Y2:%d, X3:%d, Y3:%d, X4:%d, Y4:%d\n", irX1point ,irY1point,irX2point ,irY2point,irX3point ,irY3point,irX4point ,irY4point);

		u32 pressed = WPAD_ButtonsDown(0);
		// We return to the launcher application via exit
		if ( pressed & WPAD_BUTTON_HOME ) exit(0);

		// Wait for the next frame
		VIDEO_WaitVSync();
	}

	return 0;
}

good job!bravo！

[Eke]

I think (i'm not sure) that you shouldn't use WPAD_ReadEvent in your code,

you should rather use:

WPAD_ScanPads();
WPAD_IR(0, &ir);

if (ir.valid)
{
...read ir.x and ir.y
}

you should also initialize the Virtual Display size, for example:

WPAD_SetVRes(WPAD_CHAN_ALL,640,480);

[silenceburn]

I think (i'm not sure) that you shouldn't use WPAD_ReadEvent in your code,

you should rather use:

WPAD_ScanPads();
WPAD_IR(0, &ir);

if (ir.valid)
{
...read ir.x and ir.y
}

you should also initialize the Virtual Display size, for example:

WPAD_SetVRes(WPAD_CHAN_ALL,640,480);

THANKS A LOT!
I have resolved my problem as your method