A digital input/output, used for setting or reading a bi-directional pin. More...

#include <DigitalInOut.h>

Public Member Functions
	DigitalInOut (PinName pin)
	Create a DigitalInOut connected to the specified pin. More...

	DigitalInOut (PinName pin, PinDirection direction, PinMode mode, int value)
	Create a DigitalInOut connected to the specified pin. More...

void	write (int value)
	Set the output, specified as 0 or 1 (int) More...

int	read ()
	Return the output setting, represented as 0 or 1 (int) More...

void	output ()
	Set as an output. More...

void	input ()
	Set as an input. More...

void	mode (PinMode pull)
	Set the input pin mode. More...

int	is_connected ()
	Return the output setting, represented as 0 or 1 (int) More...

DigitalInOut &	operator= (int value)
	A shorthand for write() More...

DigitalInOut &	operator= (DigitalInOut &rhs)
	A shorthand for write() using the assignment operator which copies the state from the DigitalInOut argument. More...

	operator int ()
	A shorthand for read() More...

Detailed Description

A digital input/output, used for setting or reading a bi-directional pin.

Note: Synchronization level: Interrupt safe

Definition at line 35 of file DigitalInOut.h.

Constructor & Destructor Documentation

DigitalInOut ( PinName pin )

Create a DigitalInOut connected to the specified pin.

Parameters

pin	DigitalInOut pin to connect to

Definition at line 42 of file DigitalInOut.h.

DigitalInOut	(	PinName	pin,
		PinDirection	direction,
		PinMode	mode,
		int	value
	)

Create a DigitalInOut connected to the specified pin.

Parameters

pin	DigitalInOut pin to connect to
direction	the initial direction of the pin
mode	the initial mode of the pin
value	the initial value of the pin if is an output

Definition at line 55 of file DigitalInOut.h.

Member Function Documentation

void input ( )

Set as an input.

int is_connected ( )

Return the output setting, represented as 0 or 1 (int)

Returns: Non zero value if pin is connected to uc GPIO 0 if gpio object was initialized with NC

Definition at line 104 of file DigitalInOut.h.

void mode ( PinMode pull )

Set the input pin mode.

Parameters

pull	PullUp, PullDown, PullNone, OpenDrain

operator int ( )

A shorthand for read()

See also: DigitalInOut::read()
DigitalInOut inout(PIN);
DigitalOut led(LED1);
inout.input();
led = inout; // Equivalent to led.write(inout.read())

Definition at line 143 of file DigitalInOut.h.

DigitalInOut& operator= ( int value )

A shorthand for write()

See also: DigitalInOut::write()
DigitalInOut inout(PIN);
DigitalIn button(BUTTON1);
inout.output();
inout = button; // Equivalent to inout.write(button.read())

Definition at line 120 of file DigitalInOut.h.

DigitalInOut& operator= ( DigitalInOut & rhs )

A shorthand for write() using the assignment operator which copies the state from the DigitalInOut argument.

See also: DigitalInOut::write()

void output ( )

Set as an output.

int read ( )

Return the output setting, represented as 0 or 1 (int)

Returns: an integer representing the output setting of the pin if it is an output, or read the input if set as an input

Definition at line 78 of file DigitalInOut.h.

void write ( int value )

Set the output, specified as 0 or 1 (int)

Parameters

value An integer specifying the pin output value, 0 for logical 0, 1 (or any other non-zero value) for logical 1

Definition at line 66 of file DigitalInOut.h.

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Important Information for this Arm website