Knight rider LED effect

//  MSP430G2231  

// shift reg. 74hc595 test ... Knight Rider back/forth flashing

#include  <msp430x20x2.h>

#include <io.h>

#include <signal.h>

#include <stdlib.h>

#include <stdio.h>

static void __inline__delay(register unsigned int n);

void main( void )

{

int i, k = 0x01, j, ud = 1;

WDTCTL = WDTPW + WDTHOLD; 

P1DIR |= 0x3f; 

P1SEL = 0x00;

while( 1 )

  { 

if (ud) 

  {

  k = k<<1;

  if (k == 0x80 ) ud = 0;

 }else

 {

  k = k>>1;

  if( k == 0x01) ud = 1;

}

j = k;

P1OUT &= ~BIT2;

for(i=0; i < 8; i++)

   {    

   P1OUT &= ~BIT1;

   if  (j & 0x01)

      {

      P1OUT |= BIT0;

      }else{

      P1OUT &= ~BIT0;

      }

P1OUT |= BIT1;

   j = j>>1;

   }

P1OUT |= BIT2;

}

}

// Delay Routine from mspgcc help file

static void __inline__delay(register unsigned int n)

{

  __asm__ __volatile__ (

  "1: \n"

  " dec %[n] \n"

  " jne 1b \n"

        : [n] "+r"(n));

}