Arduino-序列槽通信

《Arduino從基礎到實踐》第三章項目十，因為沒有買藍燈，我用的黃色的LED燈代替，代碼如下： char buffer[18]; int red, green, yellow;

int redPin = 9; int greenPin = 10; int yellowPin = 11;

void setup() {   // put your setup code here, to run once:   Serial.begin(9600);   Serial.flush();   pinMode(redPin, OUTPUT);   pinMode(greenPin, OUTPUT);   pinMode(yellowPin, OUTPUT); }

void loop() {   // put your main code here, to run repeatedly:   if (Serial.available() > 0)   {     int index = 0;     delay(100);     int numChar = Serial.available();

    Serial.print("Received bytes:");     Serial.println(numChar);

    if (numChar > 15)     {       numChar = 15;     }

    while (numChar--)     {       buffer[index++] = Serial.read();     }

    splitString(buffer);   } }

void splitString(char*data) {   Serial.print("Data entered: ");   Serial.println(data);

  char*parameter;   parameter = strtok(data, " ,");

  while (parameter != NULL)   {     setLED(parameter);     parameter = strtok(NULL, " ,");   }

  for (int x = 0; x < 16; x++)   {     buffer[x] = '\0';   }

  Serial.flush(); }

void setLED(char*data) {   if ((data[0] == 'r') || (data[0] == 'R'))   {     int ans = strtol(data + 1, NULL, 10);     ans = constrain(ans, 0, 255);     analogWrite(redPin, ans);     Serial.print("Red is set to: ");     Serial.println(ans);   }

  if ((data[0] == 'g') || (data[0] == 'G'))   {     int ans = strtol(data + 1, NULL, 10);     ans = constrain(ans, 0, 255);     analogWrite(greenPin, ans);     Serial.print("Green is set to: ");     Serial.println(ans);   }

  if ((data[0] == 'y') || (data[0] == 'Y'))   {     int ans = strtol(data + 1, NULL, 10);     ans = constrain(ans, 0, 255);     analogWrite(yellowPin, ans);     Serial.print("Yellow is set to: ");     Serial.println(ans);   } } 一開始用Arduino的序列槽通信視窗做實驗，後來自己在C#裡面寫了一個序列槽通信的控制台程式，也可以與之通信， 控制燈的亮度，代碼如下： SerialPort sp = null; string inputStr = string.Empty; Console.WriteLine("input cmd to port,input exit to exit"); inputStr = Console.ReadLine();  try  {      sp = new SerialPort("COM3", 9600);       sp.Open();

       while (!string.Equals(inputStr.ToUpper(), "EXIT"))         {             sp.WriteLine(inputStr);             Console.WriteLine("input cmd to port,input exit to exit");              inputStr = Console.ReadLine();            }             }      catch (Exception ex)       {            Console.WriteLine(ex);        }        finally        {             if (sp != null)            {                 sp.Close();                 sp.Dispose();             }          }                

        Console.WriteLine("Press any key to exit...");         Console.ReadKey(); 

需要注意的是，同一個序列槽隻能同時被一個程式使用，如果Arduino序列槽視窗打開，則C#程式就會運作出錯