///*------------------------------------------------------------------------------
// * File:        Lab03_D3.c
// * Function:    Turning on LED1 when S1 is pressed
// * Description: This C program turns on LED1 connected to P1.0 when the S1 is
// *              pressed. S1 is connected to P2.1 and when it is pressed,
// *              P2IN, bit 1 is read as a logic 0 (check the schematic).
// *              To avoid faulty detection of button press,
// *              debouncing delay of 20ms is added before turning on the LED1.
// * Clocks:      ACLK = 32.768kHz, MCLK = SMCLK = default DCO (~1 MHz)
// *                      MSP-EXP430F5529LP
// *                      -----------------
// *                   /|\|               |
// *                    | |               |
// *                    --|RST            |
// *                      |           P1.0|-->LED1(RED)
// *                      |           P2.1|<--SW1
// *                      |               |
// * Input:       Pressing S1
// * Output:      LED1 is turned on when S1 is pressed
// * Author(s):   Aleksandar Milenkovic, milenkovic@computer.org
// *              Prawar Poudel, prawar.poudel@uah.edu
// * Date:
// * ---------------------------------------------------------------------------*/
//#include <msp430.h>
//
//#define S1 P2IN&BIT1
//#define REDLED 0x01                     // Mask for BIT0 = 0000_0001b
//#define GREENLED 0x80                   // Mask for BIT7 = 1000_0000b
//
//void main(void)
//{
//    WDTCTL = WDTPW + WDTHOLD;           // Stop watchdog timer
//    P1DIR |= REDLED;                    // Set P1.0 to output direction
//    P1OUT &= ~REDLED;                   // LED1 is OFF
//
//    P2DIR &= ~BIT1;                     // Set P2.1 as input for S1 input
//    P2REN |= BIT1;                      // Enable the pull-up resistor at P2.1
//    P2OUT |= BIT1;                      // Required for proper IO
//
//    unsigned int i = 0;
//    while(1)                            // Infinite loop
//    {
//        if ((S1) == 0)                  // If S1 is pressed
//        {
//            for (i = 2000; i > 0; i--); // Debounce ~20 ms
//            if ((S1) == 0)              // If S1 is pressed
//            {
//                P1OUT |= REDLED;        // Turn LED1 on
//            }
//            while ((S1) == 0);          // Hang-on as long as S1 pressed
//        }
//        else
//        {
//            P1OUT &= ~REDLED;           // Turn LED1 off
//        }
//    }
//}