Joypad

The joypad functionality is provided by sdk/joypad.h.

It provides the following features:

• void joypad_update(void): function to update the joypad values. This should usually be called once a frame.
• uint8_t joypad_state: variable that contains buttons held at the last joypad_update() call.
• uint8_t joypad_pressed: variable that contains buttons that where pressed down at the last joypad_update() call but not at the joypad_update() call before that (newly pressed buttons)
• PAD_DOWN PAD_UP PAD_LEFT PAD_RIGHT PAD_START PAD_SELECT PAD_B PAD_A: bit definitions for joypad_state and joypad_pressed

Example usage:

#include <sdk/joypad.h>
#include <sdk/hardware.h>

uint8_t value;

void function() {
	while(1) {
		// Update the joypad_state and joypad_pressed variables
		update_joypad();

		// Break out of the loop if start or select is pressed
		if (joypad_pressed & (PAD_START | PAD_SELECT))
			break;

		// If left is hold down, change some value
		if (joypad_state & PAD_LEFT)
			value = value - 1;

		//Assumes vblank interrupt is setup
		HALT();
	}
}