New LF with new buttons for CNano

#include <util/delay.h>

/*

* Check out the ATtiny4809 datasheet to find the correct ports and pins 

 * Take a look at the Atmega4809 Curiosity Nano board and locate "SW0" and "LED0".

 * Right below each of them you can see which pin they are connected to. For example, if it said PD5, this would mean Port D and Pin 5.

 * This info can also be found in the ATmega4809 Curiosity Nano Hardware User Guide here: http://ww1.microchip.com/downloads/en/DeviceDoc/ATmega4809-Curiosity-Nano-HW-UG-DS50002804A.pdf to find the correct ports and pins 

 */

//Fill in the defines with the information you found on the board/in the user guide.

// LED

#define LED0 4 //On port D

#define LED0  //Fill in pin number

// Button

#define SW0 2 //On port C

#define SW0  //Fill in pin number

int main(void)

{

	/*

	 * We want to send signals to the LEDs, in order to turn it off and on.

	 * We also want to be able to read the switches.

	 * This is done by setting bits in the PORTx.DIR register (in this case PORTD.DIR and PORTC.DIR)

	 * This is done by setting bits in the PORTx.DIR register (in this case PORTF.DIR)

	 * PORTx.DIR: 1 is output, 0 is input

	 * LED: 1 LED is off, 0 LED is on

	 * Button: 1 Button is open, 0 button is pressed

	/**

	 * In order to read from the switches, we need to give it a ground reference, via a pull-up resistor.

	 * If we don't, the switch will have a floating ground, and hence its value will be undefined.

	 * On the ATtiny4809, we enable pull-up by setting the "PORT_PULLUPEN" flag in "PORTx.PINnCTRL" high.

	 * On the ATmega4809, we enable pull-up by setting the "PORT_PULLUPEN" flag in "PORTx.PINnCTRL" high.

	 * See datasheet section 15 (I/O-ports).

	 */

	 * 3 - Enable pull-up on button SW0

	 */

	PORTD.DIR |= (1 << LED0); // Set LED0 as output

	PORTC.DIR &= ~(1 << SW0); //Set SW0 as input

	PORTB.PIN2CTRL |= (1 << PORT_PULLUPEN_bp); //Enable pull-up on button SW0 (pin5)

    while (1) 

    {

    	/*

		* 3 - if not, turn the LED off

		*/

		if(!(PORTC.IN & (1 << SW0))){ // If button is pressed (0 - LOW

			PORTD.OUT &= ~(1 << LED0); // Sets output to 0, turns LED0 on

		}

		else{

			PORTD.OUT |= (1 << LED0); // Sets output to 1, turns LED off

		}

    }

}