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PACSPeripheral.cpp
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PACSPeripheral.cpp
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/*
Copyright (C) 2014 Axis Communications
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "PACSPeripheral.h"
/*
* Constructors.
*/
PACSPeripheral::PACSPeripheral() {}
PACSPeripheral::PACSPeripheral(char* pId, PACSPeripheralType_t pType, uint8_t pPin,
uint8_t pActiveLevel) {
strcpy(id, pId);
pin = pPin;
type = pType;
activeLevel = pActiveLevel;
}
/*
* Initializes the peripheral.
*/
void PACSPeripheral::initialize() {
/* Door and REX pins should be outputs.
* The reader feedback pins should be inputs.
* The lock pin is an input.
*
* We set them to inactive to avoid any issues if the pin
* is not actually connected to anything.
*/
int initialLevel = ((activeLevel == HIGH) ? LOW : HIGH);
currentLevel = previousLevel = initialLevel;
levelChanged = false;
switch (type) {
case DOORMONITOR:
case REX:
pinMode(pin, OUTPUT);
digitalWrite(pin, initialLevel);
break;
case GREENLED:
case BEEPER:
case LOCK:
pinMode(pin, INPUT);
digitalWrite(pin, initialLevel);
break;
default:
break;
}
}
/*
* Checks the current level of the peripheral against its previous value,
* and determines if a state change has occured.
*/
void PACSPeripheral::updateLevels() {
float voltage;
switch (type) {
case DOORMONITOR:
case REX:
case GREENLED:
case BEEPER:
case LOCK:
currentLevel = digitalRead(pin);
break;
default:
break;
}
if (currentLevel != previousLevel)
levelChanged = true;
else
levelChanged = false;
previousLevel = currentLevel;
}
/*
* Checks if the peripheral is currently active or not.
*/
bool PACSPeripheral::isActive() {
return (currentLevel == activeLevel) ? true : false;
}