public class MPR121Sample{
	
	static {
		try {
			System.loadLibrary("javaupm_mpr121");
		}catch (UnsatisfiedLinkError e) {
			System.err.println("error in loading native library");
			System.exit(-1);
		}
	}
	
	private static void printButtons(upm_mpr121.MPR121 touch){
		boolean buttonPresed = false;
		
		System.out.print("Buttons pressed: ");
		for (int i = 0; i < 12; i++) {
			if ( (touch.getM_buttonStates() & (1 << i)) != 0 ) {
				System.out.print( i + " ");
				buttonPresed = true;
			}
		}
		
		if (!buttonPresed) 
			System.out.print("None ");
		
		System.out.println();	
	}
	
	public static void main(String[] args) throws InterruptedException {
		// Instantiate an MPR121 on I2C bus 0
		upm_mpr121.MPR121 touch = new upm_mpr121.MPR121(0);
		
		 // init according to AN3944 defaults
		touch.configAN3944();
	
		while (true) {
			touch.readButtons();
			printButtons(touch);
			Thread.sleep(1000);
		}
	}

}