libwiikeyboard

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libwiikeyboard is included as part of libogc as an interface to an attached USB keyboard.

Contents

Usage

Include -lwiikeyboard in your Makefile.

Initialize the keyboard subsystem:

KEYBOARD_Init(NULL);

Process an event:

keyboard_event ke;
s32 res = KEYBOARD_GetEvent(&ke);
if (res && (ke.type == KEYBOARD_RELEASED || ke.type == KEYBOARD_PRESSED))
{
	// do something
}

Alternate usage - using stdin

#include <gccore.h>
#include <wiiuse/wpad.h>
#include <wiikeyboard/keyboard.h>
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
 
 
static void *xfb = NULL;
static GXRModeObj *rmode = NULL;
 
bool quitapp=false;
 
void keyPress_cb( char sym) {
 
	if (sym > 31 ) putchar(sym);
	if (sym == 13) putchar('\n');
 
	if ( sym == 0x1b) quitapp = true;
}
 
 
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;0HHello World!\n");
 
	if (KEYBOARD_Init(keyPress_cb) == 0) printf("keyboard initialised\n");
 
	do {
		// Call WPAD_ScanPads each loop, this reads the latest controller states
		WPAD_ScanPads();
 
		// 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
		u32 pressed = WPAD_ButtonsDown(0);
 
		char key = getchar();
 
		// We return to the launcher application via exit
		if ( pressed & WPAD_BUTTON_HOME ) quitapp=true;
 
		// Wait for the next frame
		VIDEO_WaitVSync();
	} while(!quitapp);
 
	return 0;
}
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