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89 lines
1.8 KiB
C++
89 lines
1.8 KiB
C++
//
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// FILE: HeartBeat.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.1
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// PURPOSE: Arduino library for HeartBeat with frequency and dutyCycle
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// DATE: 2019-06-12
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// URL: https://github.com/RobTillaart/HeartBeat
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//
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// HISTORY:
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// 0.1.0 2019-06-12 initial version
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// 0.1.1 2020-12-24 arduino-CI
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// 0.1.2 2021-01-15 renamed all to HeartBeat
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// added dutyCycle
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// 0.1.3 2021-05-27 fix arduino-lint
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// 0.2.0 2021-11-02 update Build-CI, add badges
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// add getFrequency(), getDutyCycle();
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// add getState().
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// removed set()
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// 0.2.1 2021-12-18 update library.json, license, minor edits
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#include "HeartBeat.h"
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HeartBeat::HeartBeat()
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{
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}
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void HeartBeat::begin(const uint8_t pin, float frequency)
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{
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_pin = pin;
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pinMode(_pin, OUTPUT);
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setFrequency(frequency);
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enable();
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}
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void HeartBeat::setFrequency(float frequency)
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{
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_frequency = frequency;
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if (_frequency < 0) _frequency = -frequency;
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if (_frequency < 0.001) _frequency = 0.001;
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_setFreqDuty();
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}
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void HeartBeat::setDutyCycle(float dutyCycle)
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{
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_dutyCycle = constrain(dutyCycle, 0, 100); // percentage
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_setFreqDuty();
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}
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void HeartBeat::beat()
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{
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if (_running == false)
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{
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_state = LOW;
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}
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else
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{
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uint32_t now = micros();
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if ((_state == LOW) && (now - _lastHeartBeat) < _dutyCycleLow) return;
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if ((_state == HIGH) && (now - _lastHeartBeat) < _dutyCycleHigh) return;
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_lastHeartBeat = now;
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_state = !_state;
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}
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digitalWrite(_pin, _state);
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}
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/////////////////////////////////
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//
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// PRIVATE
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//
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void HeartBeat::_setFreqDuty()
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{
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float time = 10000.0/_frequency;
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_dutyCycleHigh = round(_dutyCycle * time);
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_dutyCycleLow = round((100 - _dutyCycle) * time);
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}
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// -- END OF FILE --
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