Aaron Goselin / theBadTouch

Currently a giant piece of crap, this library is just a quick way to get cheap inputs out of scrap parts. I will fix it up eventually so if you decide to use it now you do so at your own risk. Also, if you are allergic to moronic library names you probably do not want to touch this :)

theBadTouch.cpp

Committer:
Nakor
Date:
2011-01-31
Revision:
2:cc7e700413d4
Parent:
1:69d0b1c11c73
Child:
3:4c73b047af50

File content as of revision 2:cc7e700413d4:

#include "mbed.h"
#include "theBadTouch.h"


theBadTouch::theBadTouch(PinName touchPin, PinName sink)
{
    _sensor = touchPin;
    //_sink = sink;
    _sink = new DigitalIn(sink);
    _sink->mode(PullUp);
    tracker1 = false;
    tracker2 = false;
    _touchFlag = 0x00;
    falseCounter = 0;
    t.start();
    t_off.start();
    _touchCounter = 0x00;
}



/******************/
/* Protected      */
/******************/




/******************/
/* Public         */
/******************/
// _touchFlag
// 0x00 = Free (untouched long enough to be available for instant touch)
// 0x01 = being touched
// 0x02 = Timing length of time sensor is untouched

char theBadTouch::isTouch()
{
    if(falseCounter > 20)
    {
        _untouchedFlag = 0x01;
        falseCounter = 0;
        return 0x00;
    }
    
    
    

    if(badPlace() >= 1.0)
    {
        if(_touchCounter < 0x02)
        {
            _touchCounter++;
            return false;
        }
        else
        {
            _touchCounter = 0x00;
        }
        
        if(_untouchedFlag == 0x01)
        {
            _untouchedFlag = 0x00;
            return 0x01;
        }
        else
        {
            t.reset();
            for(int i = 0; i < 20; i++)
            {
                while(badPlace() >= 1.0)
                {
                    if(t.read_ms() > 300)
                    {
                        return 0x02;
                    }
                }
            }
        }
    }
    else
    {
        falseCounter++;
        return 0x00;
    }
    
    return 0x00;
}

float theBadTouch::badPlace()
{
    _precharge = new DigitalInOut(_sensor);
    _precharge->output();
    (*_precharge) = 1; 
    _precharge->input();
    _precharge->mode(PullNone);
    delete _precharge;
    wait_ms(10);
    _sense = new AnalogIn(_sensor);
    float value = *_sense;
    delete _sense;
    
    return value;
}