Control stepper motor using DRV8818 and MSP430G2553

Quang vuong Le

Other Parts Discussed in Thread: DRV8818, MSP430G2553

Hello,

I'm using DRV8818 and MSP430G2553 to control the stepper motor 1.8 degree. Schematic I attach below. I write code for MSP430G2553 but it doesn't work, and I can't find out why. So I hope someone can help me? Here's my code:

#include <msp430g2553.h>
#define bit0   (0x01<<0)
#define bit1   (0x01<<1)
#define bit2   (0x01<<2)
#define bit3   (0x01<<3)
#define bit4   (0x01<<4)
#define bit5   (0x01<<5)
#define bit6   (0x01<<6)
#define bit7   (0x01<<7)

void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT

BCSCTL1 = CALBC1_16MHZ;
DCOCTL = CALDCO_16MHZ;
P1DIR |= 0x70;
P1OUT |= 0x70;
P1OUT &=~ bit5;
P2DIR |= 0x3E;
P2OUT |= 0x2E;
P1DIR |= bit2;
P1OUT &=~ bit2;
__bis_SR_register(GIE);// enable global interrupt
   // Start Timer_A
   TA0CCR0 = 8000 -1;          // 1000Hz
   TA0CCR1 = 4000;
   TA0CCTL1 = OUTMOD_7;    //reset/set mode
   P1SEL |= bit2;
   TA0CTL |= TASSEL_2 + MC_1;// Start timerA0 in up mode , SMCLK
}