Arduino 範例程式 - Serial port

硬體配置
   參考範例程式 "Arduino - LED"


程式
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	const byte LED = 13;
	void setup() {
	// init serial port
	Serial.begin(9600);
	Serial.print("Hello, LED pin is: ");
	Serial.println(LED);
	// init LED
	pinMode(LED, OUTPUT);
	}
	void loop() {
	char val;
	if ( Serial.available() ) {
	val = Serial.read();
	if ( val == '1' ) {
	digitalWrite(LED, HIGH);
	Serial.println("LED ON");
	} else if ( val == '0' ) {
	digitalWrite(LED, LOW);
	Serial.println("LED OFF");
	} else {
	Serial.print("LED no change, input is: ");
	Serial.println(val);
	}
	}
	}

view raw serial_led_test hosted with ❤ by GitHub

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開啓 Tools -> Serial Monitor

結果 : 送出 "1", LED 會亮; 送出 "0", LED 會熄滅

Arduino 範例程式 - LED

Ref: http://arduino.cc/en/Tutorial/Blink


這是一個基礎使用 LED 的範例程式

硬體設備

• Arduino Uno Board
• LED

電路

可以使用軟體 Fritzing 來繪製

(1) 選擇 Arduino Uno Board

(2) 加入 LED 

image developed using Fritzing. For more circuit examples, see the Fritzing project page

和以下的範例電路不同, 我沒有另外增加電阻. 這是因為 Atmel 的 ATmega328P 本身內部已有 pull high 線路.

範例

實際

----------------------------------------------

	const byte LED = 13;
	void setup() {
	pinMode(LED, OUTPUT);
	}
	void loop() {
	digitalWrite(LED, LOW);
	delay(1000);
	digitalWrite(LED, HIGH);
	delay(1000);
	}

view raw led-1 hosted with ❤ by GitHub

----------------------------------------------

執行結果


參考

• setup()
• loop()
• pinMode()
• digitalWrite()
• delay()
• BareMinimum: The bare minimum of code needed to start an Arduino sketch.
• Blink: Turn an LED on and off.
• DigitalReadSerial: Read a switch, print the state out to the Arduino Serial Monitor.
• AnalogReadSerial: Read a potentiometer, print its state out to the Arduino Serial Monitor.
• Fade: Demonstrates the use of analog output to fade an LED.
• ReadAnalogVoltage : Reads an analog input and prints the voltage to the serial monitor