TI Launchpad blinking LED

led.c

//****************************************************************************** 
//  MSP430F20xx Demo - Software Tole P1.0 
// 
//  Description; Tole P1.0 by xor'in P1.0 inside of a software loop. 
//  ACLK = n/a, MCLK = SMCLK = default DCO 
// 
//                MSP430F20xx 
//             ----------------- 
//         /|\|              XIN|- 
//          | |                 | 
//          --|RST          XOUT|- 
//            |                 | 
//            |             P1.0|-->LED 
// 
//  M.Buccini / L. Westlund 
//  Texas Instruments, Inc 
//  October 2005 
//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.40A 
// ****************************************************************************** 

#include  <msp430x20x3.h> 

void main(void) 
{ 
  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer 
  P1DIR |= 0x41;                                               // Set P1.0 P1.6 to output direction 
  //  01000001 binary for direction  1=Output, 0=Input (opposite PIC...) 


  for (;;) 
  { 
    volatile unsigned int i; 

    P1OUT ^= 0x41;                          // Toggle P1.0 using exclusive-OR 

    i = 50000;                              // Delay 
    do (i--); 
    while (i != 0); 
  } 
}