Node.js로 Arduino 제어하기 #2

/* 소스 위치 : https://raw.github.com/tobeytailor/node-arduino/master/src/node.pde */

/*
 *  node-arduino: Control your Arduino with Node
 *
 *  Copyright (c) 2010 Tobias Schneider
 *  node-arduino is freely distributable under the terms of the MIT license.
*/

#define SERIAL_BAUDRATE 9600

#define OPC_PIN_MODE         0x01 /* nodeJS에서 해당 상수값이 들어오면,  */
#define OPC_DIGITAL_READ     0x02 /* Arduino에서 지정된 함수를 실행한다. */
#define OPC_DIGITAL_WRITE    0x03
#define OPC_ANALOG_REFERENCE 0x04
#define OPC_ANALOG_READ      0x05
#define OPC_ANALOG_WRITE     0x06

void setup() {
  Serial.begin(SERIAL_BAUDRATE);
}

void loop() {
  while (Serial.available() > 0) {
    switch (Serial.read()) {
      case OPC_PIN_MODE: { // Ex. nodeJS에서는 0x01와 pin값을 차례로 전송한다.
        Serial.println("pinMode");
        pinMode(Serial.read(), Serial.read());
        break;
      }
      case OPC_DIGITAL_READ: { // Ex. nodeJS에서는 0x02 값을 전송한다.
        digitalRead(Serial.read());
        break;
      }
      case OPC_DIGITAL_WRITE: {
        Serial.println("digitalWrite");
        digitalWrite(Serial.read(), Serial.read());
        break;
      }
      case OPC_ANALOG_REFERENCE: {
        analogReference(Serial.read());
        break;
      }
      case OPC_ANALOG_READ: {
        analogRead(Serial.read());
        break;
      }
      case OPC_ANALOG_WRITE: {
        analogWrite(Serial.read(), Serial.read());
        break;
      }
    }
  }
}

/*
 * 소스 위치 : https://raw.github.com/tobeytailor/node-arduino/master/lib/arduino.js
 */
/*
 *  node-arduino: Control your Arduino with Node
 *
 *  Copyright (c) 2010 Tobias Schneider
 *  node-arduino is freely distributable under the terms of the MIT license.
 */

var sys = require('sys')
  , SerialPort = require('../deps/node-serialport/serialport').SerialPort
  ;

const SERIAL_BAUDRATE = 9600;

const OPC_PIN_MODE         = 0x01; // Arduino쪽 코드와 값을 맞춘다.
const OPC_DIGITAL_READ     = 0x02;
const OPC_DIGITAL_WRITE    = 0x03;
const OPC_ANALOG_REFERENCE = 0x04;
const OPC_ANALOG_READ      = 0x05;
const OPC_ANALOG_WRITE     = 0x06;

exports.HIGH = 0x01;
exports.LOW  = 0x00;

exports.INPUT  = 0x00;
exports.OUTPUT = 0x01;

exports.true  = 0x01;
exports.false = 0x00;

exports.EXTERNAL = 0x00;
exports.DEFAULT  = 0x01;
exports.INTERNAL = 0x03;

Board = function (path) {
  this.sp = new SerialPort(path, SERIAL_BAUDRATE);
}

Board.prototype = {
  pinMode : function (pin, mode) {
    // 값을 Buffer에 실어서 SerialPort 객체의 write 메서드를 통해 전송한다.
    this.sp.write(new Buffer([OPC_PIN_MODE, pin, mode]), 3);
  }

, digitalRead : function (pin) {
    // TODO
  }

, digitalWrite : function (pin, val) {
    this.sp.write(new Buffer([OPC_DIGITAL_WRITE, pin, val]), 3);
  }

, analogReference : function (type) {
    this.sp.write(new Buffer([OPC_ANALOG_REFERENCE, type]), 2);
  }

, analogRead : function (pin) {
    // TODO
  }

, analogWrite : function (pin, val) {
    this.sp.write(new Buffer([OPC_ANALOG_WRITE, pin, val]), 3);
  }
};

exports.connect = function (path) {
  return new Board(path);
};

/*
 *  node-arduino: Control your Arduino with Node
 *
 *  Copyright (c) 2010 Tobias Schneider
 *  node-arduino is freely distributable under the terms of the MIT license.
 */

#define SERIAL_BAUDRATE 115200

#define OPC_PIN_MODE         0x01
#define OPC_DIGITAL_READ     0x02
#define OPC_DIGITAL_WRITE    0x03
#define OPC_ANALOG_REFERENCE 0x04
#define OPC_ANALOG_READ      0x05
#define OPC_ANALOG_WRITE     0x06

long pinVal = 0;
int  inpVal = 0;
long outVal = 0;

void setup() {
  Serial.begin(SERIAL_BAUDRATE);
}

void loop() {
  pinVal = 0, inpVal = 0, outVal = 0;
  while (Serial.available() > 0) {
    switch (Serial.read()) {
      case OPC_PIN_MODE: {
        pinMode(Serial.read(), Serial.read());
        break;
      }
      case OPC_DIGITAL_READ: {
        delay(50);
        pinVal = Serial.read();         // pin값을 pinVal에 저장하고,
        inpVal = digitalRead(pinVal);   // 해당 핀에 연결된 값을 읽어서 inpVal에 저장한다.
        outVal = pinVal << 16 | inpVal; // pin값을 상위 2byte로 shift한 후에 inpVal을 하위 2byte에 넣는다.
        Serial.println(outVal);         // 읽어들인 값을 출력하는 형태로 전송한다.
        break;
      }
      case OPC_DIGITAL_WRITE: {
        digitalWrite(Serial.read(), Serial.read());
        break;
      }
      case OPC_ANALOG_REFERENCE: {
        analogReference(Serial.read());
        break;
      }
      case OPC_ANALOG_READ: {
        delay(50);
        pinVal = Serial.read();
        inpVal = analogRead(pinVal);
        outVal = pinVal << 16 | inpVal;
        Serial.println(outVal);
        break;
      }
      case OPC_ANALOG_WRITE: {
        analogWrite(Serial.read(), Serial.read());
        break;
      }
    }
  }
}