// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2019-01-14 오후 2:55:09
// by Ok-Hyun Park
//
int PWM=11,Drection=3,Brake=8;
//
int Speed=200;
//
void Forward(){ digitalWrite(Brake,0); analogWrite(PWM,Speed); digitalWrite(Drection,0); }
void Reverse(){ digitalWrite(Brake,0); analogWrite(PWM,Speed); digitalWrite(Drection,1); }
void Stop()   { digitalWrite(Brake,1); }
//
void setup(){
  pinMode(PWM,OUTPUT); pinMode(Drection,OUTPUT); pinMode(Brake,OUTPUT);
}
//
void loop(){
  if(Serial.available()){
    char r=Serial.read();
    if(r=='F')Forward();
    if(r=='R')Reverse();
    if(r=='S')Stop();
  }
}