GY-63_MS5611/libraries/PIR/PIR.cpp

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//
// FILE: PIR.cpp
// AUTHOR: Rob Tillaart
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// VERSION: 0.1.2
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// DATE: 2022-08-13
// PURPOSE: PIR library for Arduino.
// URL: https://github.com/RobTillaart/PIR
#include "PIR.h"
PIR::PIR()
{
for (int i = 0; i < 8; i++)
{
_pins[i] = 0;
}
_count = 0;
_lastValue = 0;
}
uint8_t PIR::add(uint8_t pin)
{
if (_count >= 8) return PIR_ERR_ARRAY_FULL;
_pins[_count++] = pin;
pinMode(pin, INPUT_PULLUP);
return _count - 1;
}
uint8_t PIR::count()
{
return _count;
}
uint8_t PIR::read()
{
if (_count == 0) return 0;
uint8_t rv = 0x00;
int i = _count -1;
uint8_t mask = 1 << i;
for (; i >= 0; i--)
{
if (digitalRead(_pins[i]) == HIGH)
{
rv |= mask;
}
mask >>= 1;
}
_lastValue = rv;
return rv;
}
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uint8_t PIR::changed()
{
uint8_t prev = _lastValue;
read();
return prev ^ _lastValue;
}
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uint8_t PIR::read(uint8_t index)
{
if (_count == 0) return PIR_ERR_NO_SENSOR;
if (_count <= index) return PIR_ERR_INDEX;
return digitalRead(_pins[index]) == HIGH; // 0 or 1
}
uint8_t PIR::lastValue()
{
return _lastValue;
}
// -- END OF FILE --