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