Why can't I find the keyboard?

[JoeStrout]

The standard circle lib sample 08-usbkeyboard works fine in my RPi 400. But when I essentially the same code in my circle-stdlib app, it does not work — depending on the details, it either locks up, or it just fails to ever find a keyboard.

For example, I have this in code that's called every frame:

	if (kernel->m_frameCount % 100 == 0) {
		CUSBKeyboardDevice *pKeyboard =
			(CUSBKeyboardDevice *) CDeviceNameService::Get ()->GetDevice ("ukbd1", FALSE);
		if (pKeyboard == nullptr) TextDisplay::main->Print("\nConsole: NO KBD");
		else TextDisplay::main->Print("\nConsole: Kbd found!");
	}

...and it periodically prints "Console: NO KBD", indicating that GetDevice("ukbd1", FALSE) returned nullptr every time.

The 02-stdio-hello sample also worked fine on my machine, so there's nothing wrong with the hardware. So I'm thinking something in circle-stdlib is interfering with my attempt to get the keyboard device — maybe it's already been captured for use by stdio, or something? Any tips on what I need to do to make this GetDevice call succeed?

[JoeStrout]

It turns out my CStdlibAppStudio subclass (i.e. my kernel class) had overridden Initialize(), and failed to call the base-class method.

Once I added CStdlibAppStudio::Initialize(); to my own Initialize method, it worked!