servo motor control (Slave code)

#include <mega32.h>
#include <stdio.h>
#define MAX 10
#define MAXANGLE 1999
#define MINANGLE 999
#define MOTOR_PLUS  0x01
#define MOTOR_MINUS 0x02
#include <delay.h>
unsigned char data;
void init()
{
    PORTA=0x01;
    DDRA=0x00;
    PORTB=0x00;
    DDRB=0x40;
    PORTC=0x00;
    DDRC=0x00;
    PORTD=0x00;
    DDRD=0b10100010;

    TCCR1A=0b10000010;
    TCCR1B=0b00011001;
    ICR1H=0x4E;
    ICR1L=0x1F;
    OCR1A = 1499;

    TIMSK=0b00000000;

    UCSRA=0x02;
    UCSRB=0xD8;
    UCSRC=0x86;
    UBRRH=0x00;
    UBRRL=0x0C;

    ACSR=0x80;
    SFIOR=0x00;

    SPCR=0b11001000;
    SPSR=0x00;
}

interrupt [SPI_STC] void spi_isr(void)
{
    data=SPDR;
}

void main(void)
{
    bit state = 0;
    unsigned int Press_Conf = 0;
    char cmd[] = "horzental:122";
    init();
    // Clear the SPI interrupt flag
    #asm
        in   r30,spsr
        in   r30,spdr
    #endasm
    #asm("sei")

    while (1)
    {
      // Place your code here
        if(data == MOTOR_PLUS)
        {
            if(OCR1A <= MAXANGLE)
            {
                OCR1A++;
                PORTD ^= 1 << PIND7;
                data = 0x00;
            }
        }
        else if(data == MOTOR_MINUS)
        {
            if(OCR1A >= MINANGLE)
            {
                OCR1A--;
                PORTD ^= 1 << PIND7;
                data = 0x00;
            }
        }
    }
}