//--------------------------------------
//author:Victor Chen
//web   :www.vic8051.com
//參考資料:Arduino實作入門與應用 ----台灣/松崗
//--------------------------------------
int led = 13; //設定LED腳位                                                   
//--------------------------------------                    
void setup() { //初始化設定                                             
  Serial.begin(9600);                                       
  pinMode(led, OUTPUT);                                                       
                
}                                                           
//-----------------------------------                       
void led_bl()//LED 閃動                                              
{                                                           
int i;                                                      
 for(i=0; i<2; i++)                                         
  {                                                         
   digitalWrite(led, HIGH); delay(150);                     
   digitalWrite(led, LOW);  delay(150);                     
  }                                                         
}                                                           
//-----------------------------------                       
void loop()//主程式迴圈                                                 
{                                                                             
   
char c; 
  led_bl();                                                  
 Serial.print("uart test : ");                              
 while(1)                                                   
  {                                                         
  if (Serial.available() > 0) //若有收到資料                              
    {                                                       
     c= Serial.read(); //讀取資料                                     
     if(c=='1') 
       {Serial.print("1 ");led_bl();}                                  
     if(c=='2') 
       {Serial.print("2 ");led_bl();led_bl(); }                               
     if(c=='3') 
       {Serial.print("3 ");led_bl();led_bl(); led_bl();}                      
    }                                                          
 }                                                          
}