https://github.com/ionux/mc14051b

https://github.com/ionux/mc14051b

Last synced: 6 days ago
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• Host: GitHub
• URL: https://github.com/ionux/mc14051b
• Owner: ionux
• License: gpl-3.0
• Created: 2015-11-29T21:39:50.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2015-12-17T01:26:43.000Z (about 9 years ago)
• Last Synced: 2023-08-11T18:01:32.472Z (over 1 year ago)
• Language: C++
• Size: 16.6 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# The MC14051B Arduino Library

## Introduction

The [M14051b](http://www.onsemi.com/pub_link/Collateral/MC14051B-D.PDF) is a popular and cheap analogue multiplexer that can be used to add 8 more analogue ports to your Arduino.

However, writing reading and writing to the MC14051B's ports makes sketches long and tedious, hence this driver.

## Modules

### MC14051B(int controlPin, int ABCPin[3], int X)

The constructor takes 3 parameters:

1. `controlPin` the Arduino's pin number you connect to the MC14051B's inhibitor.

2. `ABCPin` is three item array that contains the Arduino pin numbers for MC14051B's A, B, & C ports.

3. `X` is the Arduino analogue pin connected to the MC14051B X (I/O) pin.

### mcAnalogRead(char pin)

Returns the analogue input from one of the MC14051B's ports. You set which port you want to read from with the `pin` parameter shown above, where `0` reads from port `X0`, `1` reads from port `X1`, `2` reads from port `X2`, and so on.

### mcAnalogWrite(char pin, int value)

Is the same as `mcAnalogRead()` shown above, except that it pushes a number (`value`) to the MC14051B `pin`you want to write to.

### reset()

Resets the MC14051B.      

## Example

This example reads in values from an analogue sensor connected to the MC14051B port 3:

### With the library

```

#include 

#include "Wire.h"

int ABCpins[] = {8, 9, 10};

MC14051B expander(7, ABCpins, A0);

void setup ()

{

  Serial.begin(9600);

}

void loop ()

{

  Serial.println(expander.mcAnalogRead(3));

  expander.reset();

}

```

### Without the library

```

#include "Wire.h"

int controlPin=7;

int A=8;

int B=9;

int C=10;

int X=A0;

void setup ()

{

  pinMode(controlPin, OUTPUT);

  pinMode(A, OUTPUT);

  pinMode(B, OUTPUT);

  pinMode(C, OUTPUT);

  pinMode(X, INPUT);

  

  Serial.begin(9600);

}

void loop ()

{

  digitalWrite(A, 1);

  digitalWrite(B, 1);

  digitalWrite(C, 0);

  Serial.println(analogRead(X));

  

  reset();

}

void reset()

{

  digitalWrite(controlPin, HIGH);

  delay(10);

  digitalWrite(controlPin, LOW);

}

```