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98 lines
1.5 KiB
C++
98 lines
1.5 KiB
C++
#pragma once
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//
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// FILE: HC4052.h
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// AUTHOR: Rob Tillaart
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// DATE: 2023-01-25
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// VERSION: 0.2.0
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// PURPOSE: Arduino library for HC4052 2 x 4 channel multiplexer and compatibles.
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// URL: https://github.com/RobTillaart/HC4052
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#include "Arduino.h"
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#define HC4052_LIB_VERSION (F("0.2.0"))
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class HC4052
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{
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public:
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explicit HC4052(uint8_t A, uint8_t B, uint8_t enablePin = 255)
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{
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_pins[0] = A;
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_pins[1] = B;
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uint8_t i = 2;
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while (i--)
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{
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pinMode(_pins[i], OUTPUT);
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digitalWrite(_pins[i], LOW);
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}
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_channel = 0;
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if (enablePin != 255)
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{
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_enablePin = enablePin;
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pinMode(_enablePin, OUTPUT);
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digitalWrite(_enablePin, HIGH);
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}
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}
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bool setChannel(uint8_t channel)
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{
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if (channel > 0x03) return false;
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if (channel != _channel)
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{
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disable(); // prevent ghost channels.
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digitalWrite(_pins[0], channel & 0x01);
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digitalWrite(_pins[1], channel & 0x02);
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enable();
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_channel = channel;
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}
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return true;
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}
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uint8_t getChannel()
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{
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return _channel;
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}
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void enable()
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{
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if (_enablePin != 255)
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{
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digitalWrite(_enablePin, LOW);
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}
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}
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void disable()
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{
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if (_enablePin != 255)
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{
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digitalWrite(_enablePin, HIGH);
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}
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}
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bool isEnabled()
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{
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if (_enablePin != 255)
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{
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return (digitalRead(_enablePin) == LOW);
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}
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return true;
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}
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private:
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uint8_t _pins[3];
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uint8_t _enablePin = 255;
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uint8_t _channel = 0;
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};
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// -- END OF FILE --
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