DIY柔软的压力传感器，顺便试试Arduino和Processing的交互

#include <stdio.h>
int IRvalue[4] = {0, 0, 0, 0};

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  IRvalue[0] = 1024 - analogRead(A0);
  IRvalue[1] = 1024 - analogRead(A1);
  IRvalue[2] = 1024 - analogRead(A2);
  IRvalue[3] = 1024 - analogRead(A3);
  char buf[32];
  sprintf(buf, "QA%dB%dC%dD%dP", IRvalue[0], IRvalue[1], IRvalue[2], IRvalue[3]);
  Serial.println(buf);
  delay(100);
}
[/mw_shl_code]Processing程序如下：
[mw_shl_code=applescript,true]
//-------------------------------------------------------------------------------------------------------------------------------
import processing.serial.*;

int IRvalue[] = new int[4];
Serial myPort;
String buf=""; // String buffer to store serial values

void setup() { 
  size(800, 600);
  printArray(Serial.list());
  String portName = Serial.list()[0];
  myPort = new Serial(this, portName, 115200);
}

void draw() {
  background(125);
  fill(255);
  rect(0, 600-(IRvalue[0]/2), 200, (IRvalue[0]/2));
  rect(200, 600-(IRvalue[1]/2), 200, (IRvalue[1]/2));
  rect(400, 600-(IRvalue[2]/2), 200, (IRvalue[2]/2));
  rect(600, 600-(IRvalue[3]/2), 200, (IRvalue[3]/2));

  while (myPort.available ()>0) {
    serialEvent(myPort.read());
  }
}

void serialEvent(int serial) {

  if (serial!=10&&serial!=0) {   //receive
    buf += char(serial);
  } else {//if serial==10

    println(buf);
    //extract the value from the string 'buf'
    //int len1 = buf.length();
    //char input[]=new char[len1];
    char input = buf.charAt(0);
    if (input=='Q')
    {
      int head=1;//start of a number, ":"
      int tail=1;//end of a number, " "
      String temp;
      while (buf.charAt (head)!='A') {
        head++;
      }
      tail=head;
      while (buf.charAt (tail)!='B') {
        tail++;
      }
      IRvalue[0] = int(buf.substring(head+1, tail));
      while (buf.charAt (head)!='B') {
        head++;
      }
      tail=head;
      while (buf.charAt (tail)!='C') {
        tail++;
      }
      IRvalue[1] = int(buf.substring(head+1, tail));
      while (buf.charAt (head)!='C') {
        head++;
      }
      tail=head;
      while (buf.charAt (tail)!='D') {
        tail++;
      }
      IRvalue[2] = int(buf.substring(head+1, tail));

      while (buf.charAt (head)!='D') {
        head++;
      }
      tail=head;
      while (buf.charAt (tail)!='P') {
        tail++;
      }
      IRvalue[3] = int(buf.substring(head+1, tail));
    }

    buf="";//clear receive buffer
  }
}
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