[General] controlling bipolar stepper motor using msp430g2553 and Big Easy Driver .

#include <msp430g2553.h>

int step; 

void main(void) {

  WDTCTL = WDTPW + WDTHOLD;        // Stop watchdog timer
  
  // Configure CPU clock
  if (CALBC1_16MHZ==0xFF)
  {
    while(1);
  }
  DCOCTL = 0;
  BCSCTL1 = CALBC1_16MHZ;                    // Set DCO
  DCOCTL = CALDCO_16MHZ;	                // If calibra

  P1DIR |= BIT2;                   // Set P1.2 to output direction
  P1OUT &= BIT2;                  // Set the pin off

  P1DIR |= BIT4;                   // Set P1.6 to output direction
  P1OUT &= BIT4;                  // Set the pin off

//  TA0CCR0 = 1;                    // Count limit 
//  TA0CCTL0 = CCIE;                 // Enable Timer A0 interrupts, bit 4=1
//  TA0CTL = TASSEL_2 + MC_1 + ID_0;        // Timer A0 with ACLK, count UP
//
//  TA1CCR0 = 5;                 // Count limit 
//  TA1CCTL1 = CCIE;                 // Enable Timer A1 interrupts, bit 4=1
//  TA1CTL = TASSEL_2 + MC_1 + ID_0;        // Timer A1 with ACLK, count UP
  
    _BIS_SR(GIE);
  
  while (1) {
    step = 0;
    switch(step) 
    {
    case 0: 
      P1OUT &= BIT2;            // set P1.2 OFF
      P1OUT &= BIT4;                  // Set P1.4 OFF
      step= 1;
    case 1:
      
        P1OUT &= ~BIT2 , //step Low
//      P1OUT =0;
      P1OUT |= BIT4, //dir HIGH
       __delay_cycles(3);
//      P1OUT =1;
      step= 2;
      
    case 2: 
      P1OUT |= BIT4;//dir HIGH
//      P1OUT =1;
      __delay_cycles(3);
      
      P1OUT |= BIT2, //dir HIGH
      
//      P1OUT =1;
      __delay_cycles(16);
      step= 3;
    case 3: 
      P1OUT &= ~BIT2; //dir low
      __delay_cycles(16);
//      P1OUT =1;
//      __delay_cycles(16);
      P1OUT &= ~BIT4 ;//dir LOW
//      P1OUT =0;
    
      break;
      
    }