/*
  Filename: maskSw3_Mod
  Author: George Howard
  Date: 20/02/2024
  Description: this program reads the switches from PORTC and 
  if DIP_switch4 is open (1) outputs the value 0xFF to LEDs on Port A
  if DIP_switch4 is closed = ON (0) outputs the value 0x00 to LEDs on
  Port A
*/

#include <avr/io.h>
#include <util/delay.h>

#define MASK03 0x20			//0010 0000

//============== Executive Loop 
int main(void)
{
 unsigned char switchesState, ledsOut, maskedSw;

 //configure the ports
 DDRC = 0x00;			//all Port C pins configured as input
 DDRA = 0xFF;			//all Port A configured as output
 PORTC = 0xFF;			//enable the pull-up resistors

    while(1)
   	{   //--- put your tasks here.
        switchesState = PINC;             //read from the Port C switches

        maskedSw = switchesState & MASK03; //mask all the bits but bit 3

        //select what to display based on the state of SW3

        switch(maskedSw)
        {	
            case 0x00:
                ledsOut = 0x00;
            break;
            case MASK03:
                ledsOut = 0xFF;
            break;
        }
        PORTA = ledsOut;                  //display ledsOut to Port A 
    }
}