PIC 控制stepper motor

#include <16F648a.h>
#fuses NOLVP,NOMCLR,INTRC,NOPROTECT,NOCPD
#use delay(clock=4000000)
static int const LookUpTableMotor1[8]={0x01,0x09,0x08,0x0c,0x04,0x06,0x02,0x03}; //Define a look up table for motor 1
static int const LookUpTableMotor2[8]={0x01,0x09,0x08,0x0c,0x04,0x06,0x02,0x03}; //Define a look up table for motor 2
{
struct  Motor_pin_Definition   // Define a memory structure to overlay the IO Ports
 int sensor:      4;
 Boolean light1;
 Boolean light2;
 int unuesed: 2;
 int motor1:     4;
 int motor2:     4;
}MotorPort, MotorPortDirection; //Make two copies of this structure
#Byte MotorPort=0x05            //Lock these copies down to a particular location
#Byte MotorPortDirection=0x85
#define Forever 1              //define forever 1
#define speed 20
#define slowspeed  500
int counter1=0;
int counter2=0;
int speed1;
int speed2;
int TableIndex1=0;
int TableIndex2=0;

#int_RTCC                           //interrupt function
void Timer0_isr()                   // if counter1 overflows speed1 the motor one will rotate once 
{                                  //if counter2 overflows speed2 the motor two will rotate once   
 counter1++;