msp430fr413x_P1_01.c

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 *                       MSP430 CODE EXAMPLE DISCLAIMER
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 * demonstrate a single peripheral function or device feature in a highly
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 * register values and settings such as the clock configuration and care must
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//******************************************************************************
//  MSP430FR413x Demo - Software Poll P1.3, Set P1.0 if P1.3 = 1
//
//  Description: Poll P1.3 in a loop. Set P1.0 if P1.3 = 1, or reset P1.0.
//               By default, FR413x select XT1 as FLL reference.
//               If XT1 is present, the XIN and XOUT pin needs to be configured.
//               If XT1 is absent, REFO is automatically switched for FLL
//               reference.
//               XT1 is considered to be absent.
//  ACLK = default REFO ~32768Hz, MCLK = SMCLK = default DCODIV ~1MHz.
//
//              MSP430FR4133
//            ---------------
//        /|\|               |
//         | |               |
//         --|RST            |
//     /|\   |               |
//      --o--|P1.3       P1.0|-->LED
//     \|/   |               |
//           |               |
//
//   Cen Fang
//   Texas Instruments Inc.
//   June 2013
//   Built with IAR Embedded Workbench v5.60 & Code Composer Studio v5.5
//******************************************************************************

#include <msp430.h>

void main(void)
{
    WDTCTL = WDTPW | WDTHOLD;               // Stop watchdog timer

    P1OUT &= ~BIT0;                         // Clear P1.0 output latch for a defined power-on state
    P1DIR |= BIT0;                          // Set P1.0 to output direction

    P1DIR &= ~BIT3;                         // Set P1.3 as input

    PM5CTL0 &= ~LOCKLPM5;                   // Disable the GPIO power-on default high-impedance mode
                                            // to activate previously configured port settings

    while (1)                               // Test P1.4
    {
        if (P1IN & BIT3)
            P1OUT |= BIT0;                  // if P1.4 set, set P1.0
    else
        P1OUT &= ~BIT0;                     // else reset
    }
}