unsigned char MPR121_t::getNumTouches(){
if(!isInited()) return(0xFF);
unsigned char scratch = 0;
for(unsigned char i=0; i<13; i++){
if(getTouchData(i)) scratch++;
}
return(scratch);
}
static void eventThread(void *)
{
const int timeout=30000/pollPeriod; //30s
int timeoutCounter=0;
bool aPrev=false;
bool tPrev=false;
Point pOld;
for(;;)
{
Thread::sleep(pollPeriod);
//Check buttons
if(POWER_BTN_PRESS_Pin::value())
{
timeoutCounter=0;
if(aPrev==false)
callback(Event(EventType::ButtonA,EventDirection::DOWN));
aPrev=true;
} else {
if(aPrev==true)
callback(Event(EventType::ButtonA,EventDirection::UP));
aPrev=false;
}
//Check touchscreen
Point p=getTouchData();
if(p.x()>=0) //Is someone touching the screen?
{
timeoutCounter=0;
//Ok, someone is touching the screen
//did the touch point differ that much from the previous?
if(abs(pOld.x()-p.x())>3 || abs(pOld.y()-p.y())>3 || !tPrev)
{
pOld=p;
if(tPrev==false)
callback(Event(EventType::TouchDown,pOld,EventDirection::DOWN));
else callback(Event(EventType::TouchMove,pOld,EventDirection::DOWN));
}
tPrev=true;
} else {
//No, no one is touching the screen
if(tPrev==true)
callback(Event(EventType::TouchUp,pOld,EventDirection::UP));
tPrev=false;
}
if(++timeoutCounter==timeout) callback(Event(EventType::Timeout));
}
}
bool MPR121_t::isNewRelease(unsigned char electrode){
if(electrode>12 || !isInited()) return(false); // avoid out of bounds behaviour
return((getLastTouchData(electrode) == true) && (getTouchData(electrode) == false));
}
