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2850 dpurdie 1 
//******************************************************************************
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//  MSP430x6xx Demo - Software Toggle P1.0
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//
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//  Description; Toggle P1.0 by xor'ing P1.0 inside of a software loop.
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//  ACLK = n/a, MCLK = SMCLK = default DCO
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//
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//                MSP430x6xx
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//             -----------------
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//         /|\|              XIN|-
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//          | |                 |
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//          --|RST          XOUT|-
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//            |                 |
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//            |             P1.0|-->LED
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//
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//  M. Pfeiffer
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//  Texas Instruments, Inc
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//  March 2009
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//  Built with CCS for MSP430 Version: 4
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//******************************************************************************
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#include "msp430f6638.h"
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int main(void)
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{
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  WDTCTL = WDTPW + WDTHOLD;             // Stop watchdog timer
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  P1DIR |= 0x01;                        // Set P1.0 to output direction
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  for (;;)
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  {
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    volatile unsigned int i;            // volatile to prevent optimization
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    P1OUT ^= 0x01;                      // Toggle P1.0 using exclusive-OR
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    i = 10000;                          // SW Delay
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    do i--;
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    while (i != 0);
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  }
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}