gistfile1.txt

void loop(){
  m1_drive(50);
  m2_drive(-50);
}

void m1_drive(int speed){
  int val = map(speed, -100, 100, 1, 127);
  if (val > 127){
    val = 127;
  }
  else if (val < 1){ 
    val = 1;
  }
  else{
    val = 64; 
  }
  Serial.write(speed)
}

void m2_drive(int speed){
  int val = map(speed, -100, 100, 128, 255);
  if (val < 128){
    val = 128;
  }
  else if (val > 255){
    val = 255;
  }
  else{
    val = 192;
  }
  Serial.write(speed)
}

void stop_motors(){
  Serial.write(0)
}