I2C motor control code for Rascal/Arduino

i2c-motor.c

// Motor number 1 (Front) is 29 hex or 41 decimal
 
#include <Wire.h>
#include <AFMotor.h>
 
AF_DCMotor motor(4);
 
int x=0;
 
void setup() 
{
  Wire.begin(41);                // Set I2C address
  Wire.onReceive(receiveEvent);  // Set up interrupt handler
  motor.setSpeed(200);
  motor.run(RELEASE);
}
 
void loop() 
{  
  motor.run(FORWARD);
  motor.setSpeed(x);
}
 
void receiveEvent(int nothing) 
{
  x = Wire.read();    // receive byte as an integer
}