Gpio Class Reference

Public Types
enum	Direction { INPUT , OUTPUT }

Public Member Functions
int	open (unsigned int pin, Direction direction, bool unexport=true)
void	close ()
bool	read ()
void	set ()
void	clear ()
void	write (bool value)
bool	enabled ()

Static Public Member Functions
static uint32_t	getBankAddress (unsigned int bank)

Detailed Description

Examples

Extras/cape-test/render.cpp, and synchronous-gpio/render.cpp.

Member Function Documentation

open()

int Gpio::open	(	unsigned int	pin,
		Direction	direction,
		bool	unexport = true )

Opens a GPIO pin.

Parameters

pin	the GPIO pin ( 0 <= pin < 128)
direction	one of INPUT or OUTPUT
unexport	if false, it will not try to unexport the pin when calling close()

Returns

0 if success, -1 otherwise;

Examples

Extras/cape-test/render.cpp, and synchronous-gpio/render.cpp.

close()

void Gpio::close

(

)

Closes a currently open GPIO

read()

bool Gpio::read ( )

inline

Read the GPIO value.

Returns

the GPIO value

set()

void Gpio::set ( )

inline

Set the output to 1.

clear()

void Gpio::clear ( )

inline

Clear the output

write()

void Gpio::write ( bool value )

inline

Write an output value

Parameters

value

the value to write

enabled()

bool Gpio::enabled ( )

inline

Check if the GPIO is enabled.

Returns

true if enabled, false otherwise

getBankAddress()

uint32_t Gpio::getBankAddress ( unsigned int bank )

static

A utility function to return the base address of a Gpio bank.

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

• include/Gpio.h