mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
115 lines
1.9 KiB
C++
115 lines
1.9 KiB
C++
#pragma once
|
|
//
|
|
// FILE: HC4067.h
|
|
// AUTHOR: Rob Tillaart
|
|
// DATE: 2023-01-25
|
|
// VERSION: 0.2.1
|
|
// PURPOSE: Arduino library for CD74HC4067 1 x 16 channel multiplexer and compatibles.
|
|
// URL: https://github.com/RobTillaart/HC4067
|
|
|
|
|
|
|
|
#include "Arduino.h"
|
|
|
|
#define HC4067_LIB_VERSION (F("0.2.1"))
|
|
|
|
|
|
class HC4067
|
|
{
|
|
public:
|
|
explicit HC4067(uint8_t s0, uint8_t s1, uint8_t s2, uint8_t s3, uint8_t enablePin = 255)
|
|
{
|
|
_pins[0] = s0;
|
|
_pins[1] = s1;
|
|
_pins[2] = s2;
|
|
_pins[3] = s3;
|
|
uint8_t i = 4;
|
|
while (i--)
|
|
{
|
|
pinMode(_pins[i], OUTPUT);
|
|
digitalWrite(_pins[i], LOW);
|
|
}
|
|
_channel = 0;
|
|
|
|
if (enablePin != 255)
|
|
{
|
|
_enablePin = enablePin;
|
|
pinMode(_enablePin, OUTPUT);
|
|
digitalWrite(_enablePin, HIGH);
|
|
}
|
|
}
|
|
|
|
|
|
bool setChannel(uint8_t channel, bool disable = true)
|
|
{
|
|
if (channel > 15) return false;
|
|
uint8_t _new = channel;
|
|
if (_new != _channel)
|
|
{
|
|
uint8_t _changed = _new ^ _channel;
|
|
uint8_t mask = 0x08;
|
|
uint8_t i = 3;
|
|
if (disable)
|
|
{
|
|
this->disable(); // prevent ghost channels.
|
|
}
|
|
while (mask)
|
|
{
|
|
// only write changed pins. // AVR only?
|
|
if (mask & _changed)
|
|
{
|
|
digitalWrite(_pins[i--], (mask & _new));
|
|
}
|
|
mask >>= 1;
|
|
}
|
|
enable();
|
|
_channel = _new;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
uint8_t getChannel()
|
|
{
|
|
return _channel;
|
|
}
|
|
|
|
|
|
void enable()
|
|
{
|
|
if (_enablePin != 255)
|
|
{
|
|
digitalWrite(_enablePin, LOW);
|
|
}
|
|
}
|
|
|
|
|
|
void disable()
|
|
{
|
|
if (_enablePin != 255)
|
|
{
|
|
digitalWrite(_enablePin, HIGH);
|
|
}
|
|
}
|
|
|
|
|
|
bool isEnabled()
|
|
{
|
|
if (_enablePin != 255)
|
|
{
|
|
return (digitalRead(_enablePin) == LOW);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
private:
|
|
uint8_t _pins[4];
|
|
uint8_t _enablePin = 255;
|
|
uint8_t _channel = 0;
|
|
};
|
|
|
|
|
|
// -- END OF FILE --
|
|
|