EndpointRaspberry::EndpointRaspberry(ptree &pt)
:HardwareEndpoint(pt),
pinNumber(pt.get<int>("pin")),
invert(pt.get<bool>("invert",false))
{
if(!initialized)
{
if(wiringPiSetup())
throw HeinzException("unable to initialize wiringPi");
initialized=true;
}
string pull_mode_s=pt.get<string>("pull","off");
int pull_mode=PUD_OFF;
if(pull_mode_s=="off")
pull_mode=PUD_OFF;
else if(pull_mode_s=="up")
pull_mode=PUD_UP;
else if(pull_mode_s=="down")
pull_mode=PUD_DOWN;
else
BOOST_THROW_EXCEPTION(ConfigException()<<ExErrorMessage((boost::format("unknown pull mode: %1%")%pull_mode_s).str()));
if(allocatedPins.find(pinNumber)!=allocatedPins.end())
BOOST_THROW_EXCEPTION(ConfigException()<<ExErrorMessage((boost::format("pin %1% already in use")%pinNumber).str()));
allocatedPins.insert(pinNumber);
pinMode(pinNumber,getIsInput()?INPUT:OUTPUT);
if(getIsInput())
pullUpDnControl(pinNumber, pull_mode);
}
bool EndpointRaspberry::updatesAvailable()
{
if(!getIsInput())
return false;
bool v=digitalRead(pinNumber)==HIGH;
if((cachedValue==1)!=v)
{
cachedValue=v?1:0;
return true;
}
return false;
}
/// mode changed handler
void SignalItem::onParentModeChanged(int) {
isOutputChanged(getIsOutput());
isInputChanged(getIsInput());
}