#include <wiringPi/wiringPi.h>
#include <time.h>
#include <unistd.h>

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Functions
int	wiringPiSetup (void)
	Must be called once at the start of your program execution. More...

int	wiringPiSetupGpio (void)
	Must be called once at the start of your program execution. More...

int	wiringPiSetupPhys (void)
	Must be called once at the start of your program execution. More...

int	wiringPiSetupSys (void)
	Must be called once at the start of your program execution. More...

int	wiringPiISR (int pin, int edgeType, void(*function)(void))
	Register a Interrupt Service Routine (ISR) - Pi Specific. More...

void	pinMode (int pin, int mode)
	Sets the mode of a pin to be input, output or PWM output. More...

void	pullUpDnControl (int pin, int pud)
	Control the internal pull-up/down resistors on a GPIO pin. More...

void	digitalWrite (int pin, int value)
	Set an output bit. More...

void	pwmWrite (int pin, int value)
	Set an output PWM value. More...

int	digitalRead (int pin)
	Read the value of a given Pin. More...

int	analogRead (int pin)
	Read the analogue value of a given Pin. More...

void	analogWrite (int pin, int value)
	Write the analog value to the given Pin. More...

int	waitForInterrupt (int pin, int timeOut, int mode)
	When called, it will wait for an interrupt event to happen on that pin and your program will be stalled.. More...

void	wiringpi_helper_timespec_diff (struct timespec start, struct timespec stop, struct timespec *result)

unsigned int	millis (void)
	Get time in milliseconds. More...

unsigned int	micros (void)
	Get time in microseconds. More...

void	delay (unsigned int howLongMillis)
	Wait for an amount of milliseconds. More...

void	delayMicroseconds (unsigned int howLongMicros)
	Wait for an amount of microseconds. More...

void	wiringPiVersion (int major, int minor)
	Get the current major and minor version number. More...

Variables
struct timespec	wiring_pi_setup_time

Function Documentation

◆ analogRead()

int analogRead ( int pin )

Read the analogue value of a given Pin.

There is no on-board Pi analog hardware, so this needs to go to a new node.

Parameters

pin	Pin number

Returns: LOW or HIGH

◆ analogWrite()

void analogWrite	(	int	pin,
		int	value
	)

Write the analog value to the given Pin.

There is no on-board Pi analog hardware, so this needs to go to a new node.

Parameters

pin	Pin number
value	Value

◆ delay()

void delay ( unsigned int howLong )

Wait for an amount of milliseconds.

Parameters

howLong Milliseconds to wait

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◆ delayMicroseconds()

void delayMicroseconds ( unsigned int howLong )

Wait for an amount of microseconds.

Parameters

howLong Microseconds to wait

◆ digitalRead()

int digitalRead ( int pin )

Read the value of a given Pin.

Parameters

pin	Pin number

Returns: LOW or HIGH

◆ digitalWrite()

void digitalWrite	(	int	pin,
		int	value
	)

Set an output bit.

Parameters

pin	Pin number
value	PWM value

◆ micros()

unsigned int micros ( void )

Get time in microseconds.

Wraps after 71 minutes.

Returns: Microseconds

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◆ millis()

unsigned int millis ( void )

Get time in milliseconds.

Wraps after 49 days.

Returns: Milliseconds

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◆ pinMode()

void pinMode	(	int	pin,
		int	mode
	)

Sets the mode of a pin to be input, output or PWM output.

Parameters

pin	Pin number
mode	Pin type (INPUT, OUTPUT, PWM_OUTPUT, etc.)

◆ pullUpDnControl()

void pullUpDnControl	(	int	pin,
		int	pud
	)

Control the internal pull-up/down resistors on a GPIO pin.

Parameters

pin	Pin number
mode	PUD_OFF, PUD_DOWN, or PUD_UP

◆ pwmWrite()

void pwmWrite	(	int	pin,
		int	value
	)

Set an output PWM value.

Parameters

pin	Pin number
value	LOW or HIGH

◆ waitForInterrupt()

int waitForInterrupt	(	int	pin,
		int	timeOut,
		int	mode
	)

When called, it will wait for an interrupt event to happen on that pin and your program will be stalled..

The timeOut parameter is given in milliseconds, or can be -1 which means to wait forever.

Parameters

pin	Pin number
timeout	Timeout (milliseconds)
mode	INT_EDGE_SETUP, INT_EDGE_FALLING, INT_EDGE_RISING, INT_EDGE_BOTH

Returns: The return value is -1 if an error occurred (and errno will be set appropriately), 0 if it timed out, or 1 on a successful interrupt event.

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◆ wiringpi_helper_timespec_diff()

void wiringpi_helper_timespec_diff	(	struct timespec *	start,
		struct timespec *	stop,
		struct timespec *	result
	)

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◆ wiringPiISR()

int wiringPiISR	(	int	pin,
		int	edgeType,
		void(*)(void)	function
	)

Register a Interrupt Service Routine (ISR) - Pi Specific.

Parameters

pin	Pin number
edgeType	INT_EDGE_SETUP, INT_EDGE_FALLING, INT_EDGE_RISING, INT_EDGE_BOTH
function	The ISR callback function

Returns: int Exit code.

◆ wiringPiSetup()

int wiringPiSetup ( void )

Must be called once at the start of your program execution.

Default setup: Initialises the system into wiringPi Pin mode and uses the memory mapped hardware directly.

Todo:: Actually enforce this.

Returns: int Exit code.

◆ wiringPiSetupGpio()

int wiringPiSetupGpio ( void )

Must be called once at the start of your program execution.

GPIO setup: Initialises the system into GPIO Pin mode and uses the memory mapped hardware directly.

Todo:: Actually enforce this.

Returns: int Exit code.

◆ wiringPiSetupPhys()

int wiringPiSetupPhys ( void )

Must be called once at the start of your program execution.

Phys setup: Initialises the system into Physical Pin mode and uses the memory mapped hardware directly.

Todo:: Actually enforce this.

Returns: int Exit code.

◆ wiringPiSetupSys()

int wiringPiSetupSys ( void )

Must be called once at the start of your program execution.

Initialisation (again), however this time we are using the /sys/class/gpio interface to the GPIO systems - slightly slower, but always usable as a non-root user, assuming the devices are already exported and setup correctly.

Todo:: Actually enforce this.

Returns: int Exit code.

◆ wiringPiVersion()

void wiringPiVersion	(	int *	major,
		int *	minor
	)

Get the current major and minor version number.

Parameters

[out]	major	Major version number
[out]	minor	Minor version number

Variable Documentation

◆ wiring_pi_setup_time

struct timespec wiring_pi_setup_time

Functions

Variables

Function Documentation

◆ analogRead()

◆ analogWrite()

◆ delay()

◆ delayMicroseconds()

◆ digitalRead()

◆ digitalWrite()

◆ micros()

◆ millis()

◆ pinMode()

◆ pullUpDnControl()

◆ pwmWrite()

◆ waitForInterrupt()

◆ wiringpi_helper_timespec_diff()

◆ wiringPiISR()

◆ wiringPiSetup()

◆ wiringPiSetupGpio()

◆ wiringPiSetupPhys()

◆ wiringPiSetupSys()

◆ wiringPiVersion()

Variable Documentation

◆ wiring_pi_setup_time