//**********modify your subroutine as below  upadated**************//
#include <msp430x14x.h>
#define uchar unsigned char
//#define uint unsigned int
void main( void )
{
  
  WDTCTL = WDT_ADLY_1000;
  IE1 |= WDTIE;
  P2DIR |=BIT0+BIT1+BIT2+BIT3;
  P2OUT|=0xFF;
  _EINT();
  while(1)
  {
    _NOP();
  }
}
#pragma vector = WDT_VECTOR
__interrupt void itemp(void)
{
  uchar temp=0x01, static uchar i=0;
  temp<<=i; // revise from 1to i;
  P2OUT&=~temp;
  i++;
  if （i==4） i=0;
}

//**********modify your subroutine as below**************//
#include <msp430x14x.h>
#define uchar unsigned char
//#define uint unsigned int
void main( void )
{
  
  WDTCTL = WDT_ADLY_1000;
  IE1 |= WDTIE;
  P2DIR |=BIT0+BIT1+BIT2+BIT3;
  P2OUT|=0xFF;
  _EINT();
  while(1)
  {
    _NOP();
  }
}
#pragma vector = WDT_VECTOR
__interrupt void itemp(void)
{
  uchar temp=0x01, static uchar i=0;
  temp<<=1;
  P2OUT&=~temp;
  i++;
  if （i==4） i=0;
}

上面程序，图片看不清

#include <msp430x14x.h>

void main( void )
{
  
  WDTCTL = WDT_ADLY_1000;
  IE1 |= WDTIE;
  P2DIR |=BIT0+BIT1+BIT2+BIT3;
  P2OUT=0xfe;
  _EINT();
  while(1)
  {
    _NOP();
  }
}
#pragma vector = WDT_VECTOR
__interrupt void itemp(void)
{
  P2OUT<<=1;
  P2OUT|=0x01;
}

我百度了很多，基本都是51单片机，很多都看不懂