MUX_74HC40520 Class Reference

Defines a firmware interface for the 74HC40520 multiplexer. More...

#include <74HC40520.hpp>

Public Types
enum	Mux_Channel { X , Y }
	Defines the two MUX signal channels X and Y. More...

Public Member Functions
void	setPins (int mux_inh, int mux_a, int mux_b)
	Sets the output level of the two selector pins (A&B) and the inhibitor pin and stores the pin values.
void	select (int channel)
	Select the channels to connect to the X and Y output pins.
int	readChannel (int pin)
	Reads the analog value at the channel.
void	writeChannel (int pin, int value)
	Writes a channel.

Private Attributes
uint8_t	mux_inh
uint8_t	mux_a
uint8_t	mux_b

Detailed Description

Defines a firmware interface for the 74HC40520 multiplexer.

Chip Pin Truth Table

MUX_INH	B	A	Selected Channels
L	L	L	0X, 0Y
L	L	H	1X, 1Y
L	H	L	2X, 2Y
L	H	H	3X, 3Y
H	X	X	XXXXXX

Member Enumeration Documentation

Mux_Channel

enum MUX_74HC40520::Mux_Channel

Defines the two MUX signal channels X and Y.

Use these channesl to select which channel you want to write or read a value to/from.

Enumerator
X	X channel.
Y	Y channel.

Member Function Documentation

readChannel()

int MUX_74HC40520::readChannel ( int  pin )

inline

Reads the analog value at the channel.

Parameters

[in]

outputChannel

The output channel, can be enum Mux_Channel

select()

void MUX_74HC40520::select ( int  channel )

inline

Select the channels to connect to the X and Y output pins.

Parameters

[in]

channel

The channel

setPins()

void MUX_74HC40520::setPins ( int  mux_inh, int  mux_a, int  mux_b  )

inline

Sets the output level of the two selector pins (A&B) and the inhibitor pin and stores the pin values.

Parameters

[in]	mux_inh	The multiplexer inhibitor pin, if HIGH no channel is connected to X/Y pins.
[in]	mux_a	The multiplexer a selector pin
[in]	mux_b	The multiplexer b selector pin

writeChannel()

void MUX_74HC40520::writeChannel ( int  pin, int  value  )

inline

Writes a channel.

Parameters

[in]	inputChannel	The input channel
[in]	value	The integer value to write to the pin, HIGH or LOW.

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The documentation for this class was generated from the following file:

• lib/74HC40520/74HC40520.hpp