QTouch 1-wire Library

 by Dave Vondle, IDEO Labs

Download

Download Qtouch1Wire.zip

Overview

This is a library based on Dave Mellis' SoftwareSerial library that makes it easy to talk to QTouch (and other?) chipsets over the 1-wire serial interface. There are 2 examples included. One that simply polls the device for the status and one that utilizes an interrupt to trigger a read.

Installation

• Download
• Unzip, and add to Arduino/hardware/libraries/ (on a mac: /Applications/Arduino.app/Contents/Resources/Java/hardware/libraries)
• To add to a new sketch choose Sketch->Import Library->Qtouch1wire

Demo Sketch

/*
 Qtouch QT1103 1-wire serial example

 polls and prints the status of the capacitive pads.

 if you have the E1103 evaluation board, the pads are layed out in the 2x5 grid like:
 96574
 81203

 Created 23 November 2009
 By Dave Vondle

 */
#include <Qtouch1wire.h>

#define ONEWIREPIN 3

unsigned int value;

void setup() {

  OneWire.begin(ONEWIREPIN, 9600); // should be > 8000 according to datasheet
  Serial.begin(19200);
}

void loop() {
  delay(100);

  value = OneWire.requestRead();

  if(value>>8 & B00000001){
    Serial.print("0");
  }else{
    Serial.print(" ");
  }
  if(value>>8 & B00000010){
    Serial.print("1");
  }else{
    Serial.print(" ");
  }
  if(value>>8 & B00000100){
    Serial.print("2");
  }else{
    Serial.print(" ");
  }
  if(value>>8 & B00001000){
    Serial.print("3");
  }else{
    Serial.print(" ");
  }
  if(value>>8 & B00010000){
    Serial.print("4");
  }else{
    Serial.print(" ");
  }
  if(value>>8 & B00100000){
    Serial.print("5");
  }else{
    Serial.print(" ");
  }
  if(value & B00000001){
    Serial.print("6");
  }else{
    Serial.print(" ");
  }
  if(value & B00000010){
    Serial.print("7");
  }else{
    Serial.print(" ");
  }
  if(value & B00000100){
    Serial.print("8");
  }else{
    Serial.print(" ");
  }
  if(value & B00001000){
    Serial.print("9");
  }else{
    Serial.print(" ");
  }
  Serial.print("      ");
  Serial.println(value, BIN);  

}